Source/Terrain.cpp

   1 /*
   2 Copyright (C) 2003, 2010 - Wolfire Games
   3
   4 This file is part of Lugaru.
   5
   6 Lugaru is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 Lugaru is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with Lugaru.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "Game.h"
  21 #include "Terrain.h"
  22 #include "Objects.h"
  23 extern XYZ viewer;
  24 extern float viewdistance;
  25 extern float fadestart;
  26 extern int environment;
  27 extern float texscale;
  28 extern Light light;
  29 extern float multiplier;
  30 extern FRUSTUM frustum;
  31 extern float texdetail;
  32 extern int detail;
  33 extern bool decals;
  34 extern float blurness;
  35 extern float targetblurness;
  36 extern Objects objects;
  37 extern TGAImageRec texture;
  38 extern bool visibleloading;
  39 extern bool skyboxtexture;
  40 extern int tutoriallevel;
  41
  42 //Functions
  43
  44 int Terrain::lineTerrain(XYZ p1, XYZ p2, XYZ *p)
  45 {
  46     static int i, j, k;
  47     static float distance;
  48     static float olddistance;
  49     static int intersecting;
  50     static int firstintersecting;
  51     static XYZ point;
  52     static int startx, starty;
  53     static int endx, endy;
  54     static float highest, lowest;
  55
  56     firstintersecting = -1;
  57     olddistance = 10000;
  58     distance = 1;
  59
  60     XYZ triangles[3];
  61
  62     p1 /= scale;
  63     p2 /= scale;
  64
  65     startx = p1.x;
  66     starty = p1.z;
  67     endx = p2.x;
  68     endy = p2.z;
  69
  70     if (startx > endx) {
  71         i = endx;
  72         endx = startx;
  73         startx = i;
  74     }
  75     if (starty > endy) {
  76         i = endy;
  77         endy = starty;
  78         starty = i;
  79     }
  80
  81     if (startx < 0)
  82         startx = 0;
  83     if (starty < 0)
  84         starty = 0;
  85     if (endx > size - 1)
  86         endx = size - 1;
  87     if (endy > size - 1)
  88         endy = size - 1;
  89
  90     for (i = startx; i <= endx; i++) {
  91         for (j = starty; j <= endy; j++) {
  92             highest = -1000;
  93             lowest = 1000;
  94             for (k = 0; k < 2; k++) {
  95                 if (heightmap[i + k][j] > highest)
  96                     highest = heightmap[i + k][j];
  97                 if (heightmap[i + k][j] < lowest)
  98                     lowest = heightmap[i + k][j];
  99                 if (heightmap[i + k][j + 1] > highest)
 100                     highest = heightmap[i + k][j + 1];
 101                 if (heightmap[i + k][j + 1] < lowest)
 102                     lowest = heightmap[i + k][j + 1];
 103             }
 104             if ((p1.y <= highest || p2.y <= highest) && (p1.y >= lowest || p2.y >= lowest)) {
 105                 triangles[0].x = i;
 106                 triangles[0].y = heightmap[i][j];
 107                 triangles[0].z = j;
 108
 109                 triangles[1].x = i;
 110                 triangles[1].y = heightmap[i][j + 1];
 111                 triangles[1].z = j + 1;
 112
 113                 triangles[2].x = i + 1;
 114                 triangles[2].y = heightmap[i + 1][j];
 115                 triangles[2].z = j;
 116
 117                 intersecting = LineFacet(p1, p2, triangles[0], triangles[1], triangles[2], &point);
 118                 distance = distsq(&p1, &point);
 119                 if ((distance < olddistance || firstintersecting == -1) && intersecting == 1) {
 120                     olddistance = distance;
 121                     firstintersecting = 1;
 122                     *p = point;
 123                 }
 124
 125                 triangles[0].x = i + 1;
 126                 triangles[0].y = heightmap[i + 1][j];
 127                 triangles[0].z = j;
 128
 129                 triangles[1].x = i;
 130                 triangles[1].y = heightmap[i][j + 1];
 131                 triangles[1].z = j + 1;
 132
 133                 triangles[2].x = i + 1;
 134                 triangles[2].y = heightmap[i + 1][j + 1];
 135                 triangles[2].z = j + 1;
 136
 137                 intersecting = LineFacet(p1, p2, triangles[0], triangles[1], triangles[2], &point);
 138                 distance = distsq(&p1, &point);
 139                 if ((distance < olddistance || firstintersecting == -1) && intersecting == 1) {
 140                     olddistance = distance;
 141                     firstintersecting = 1;
 142                     *p = point;
 143                 }
 144             }
 145         }
 146     }
 147     return firstintersecting;
 148 }
 149
 150 void Terrain::UpdateTransparency(int whichx, int whichy)
 151 {
 152     static XYZ vertex;
 153     static int i, j, a, b, c, d, patch_size, stepsize;
 154     static float distance;
 155
 156     static float viewdistsquared;
 157
 158     viewdistsquared = viewdistance * viewdistance;
 159     patch_size = size / subdivision;
 160
 161     stepsize = 1;
 162     c = whichx * patch_elements + whichy * patch_elements * subdivision;
 163
 164     for (i = patch_size * whichx; i < patch_size * (whichx + 1) + 1; i += stepsize) {
 165         for (j = patch_size * whichy; j < patch_size * (whichy + 1) + 1; j += stepsize) {
 166             if (i < size && j < size) {
 167                 vertex.x = i * scale;
 168                 vertex.z = j * scale;
 169                 vertex.y = heightmap[i][j] * scale;
 170                 distance = distsq(&viewer, &vertex);
 171                 if (distance > viewdistsquared)
 172                     distance = viewdistsquared;
 173                 colors[i][j][3] = (viewdistsquared - (distance - (viewdistsquared * fadestart)) * (1 / (1 - fadestart))) / viewdistsquared;
 174             }
 175         }
 176     }
 177
 178     for (i = patch_size * whichx; i < patch_size * (whichx + 1); i += stepsize) {
 179         for (j = patch_size * whichy; j < patch_size * (whichy + 1); j += stepsize) {
 180             a = (i - (patch_size * whichx)) / stepsize;
 181             b = (j - (patch_size * whichy)) / stepsize;
 182             d = (a * 54) + (b * 54 * patch_size / stepsize);
 183             vArray[d + c + 6] = colors[i][j][3];
 184
 185             vArray[d + c + 15] = colors[i][j + stepsize][3];
 186
 187             vArray[d + c + 24] = colors[i + stepsize][j][3];
 188
 189             vArray[d + c + 33] = colors[i + stepsize][j][3];
 190
 191             vArray[d + c + 42] = colors[i][j + stepsize][3];
 192
 193             vArray[d + c + 51] = colors[i + stepsize][j + stepsize][3];
 194         }
 195     }
 196 }
 197
 198 void Terrain::UpdateTransparencyother(int whichx, int whichy)
 199 {
 200     static XYZ vertex;
 201     static int i, j, a, b, c, d, patch_size, stepsize;
 202
 203     patch_size = size / subdivision;
 204
 205     stepsize = 1;
 206     c = whichx * patch_elements + whichy * patch_elements * subdivision;
 207
 208     for (i = patch_size * whichx; i < patch_size * (whichx + 1); i += stepsize) {
 209         for (j = patch_size * whichy; j < patch_size * (whichy + 1); j += stepsize) {
 210             a = (i - (patch_size * whichx)) / stepsize;
 211             b = (j - (patch_size * whichy)) / stepsize;
 212             d = (a * 54) + (b * 54 * patch_size / stepsize);
 213             vArray[d + c + 6] = colors[i][j][3] * opacityother[i][j];
 214
 215             vArray[d + c + 15] = colors[i][j + stepsize][3] * opacityother[i][j + stepsize];
 216
 217             vArray[d + c + 24] = colors[i + stepsize][j][3] * opacityother[i + stepsize][j];
 218
 219             vArray[d + c + 33] = colors[i + stepsize][j][3] * opacityother[i + stepsize][j];
 220
 221             vArray[d + c + 42] = colors[i][j + stepsize][3] * opacityother[i][j + stepsize];
 222
 223             vArray[d + c + 51] = colors[i + stepsize][j + stepsize][3] * opacityother[i + stepsize][j + stepsize];
 224         }
 225     }
 226 }
 227
 228 void Terrain::UpdateTransparencyotherother(int whichx, int whichy)
 229 {
 230     static XYZ vertex;
 231     static int i, j, a, b, c, d, patch_size, stepsize;
 232     static float distance;
 233
 234     static float viewdistsquared;
 235
 236     viewdistsquared = viewdistance * viewdistance;
 237     patch_size = size / subdivision;
 238
 239     stepsize = 1;
 240     c = whichx * patch_elements + whichy * patch_elements * subdivision;
 241
 242     for (i = patch_size * whichx; i < patch_size * (whichx + 1) + 1; i += stepsize) {
 243         for (j = patch_size * whichy; j < patch_size * (whichy + 1) + 1; j += stepsize) {
 244             if (i < size && j < size) {
 245                 vertex.x = i * scale;
 246                 vertex.z = j * scale;
 247                 vertex.y = heightmap[i][j] * scale;
 248                 distance = distsq(&viewer, &vertex);
 249                 if (distance > viewdistsquared)
 250                     distance = viewdistsquared;
 251                 colors[i][j][3] = (viewdistsquared - (distance - (viewdistsquared * fadestart)) * (1 / (1 - fadestart))) / viewdistsquared;
 252             }
 253         }
 254     }
 255
 256     for (i = patch_size * whichx; i < patch_size * (whichx + 1); i += stepsize) {
 257         for (j = patch_size * whichy; j < patch_size * (whichy + 1); j += stepsize) {
 258             a = (i - (patch_size * whichx)) / stepsize;
 259             b = (j - (patch_size * whichy)) / stepsize;
 260             d = (a * 54) + (b * 54 * patch_size / stepsize);
 261             vArray[d + c + 6] = colors[i][j][3];
 262
 263             vArray[d + c + 15] = colors[i][j + stepsize][3];
 264
 265             vArray[d + c + 24] = colors[i + stepsize][j][3];
 266
 267             vArray[d + c + 33] = colors[i + stepsize][j][3];
 268
 269             vArray[d + c + 42] = colors[i][j + stepsize][3];
 270
 271             vArray[d + c + 51] = colors[i + stepsize][j + stepsize][3];
 272         }
 273     }
 274 }
 275
 276 void Terrain::UpdateVertexArray(int whichx, int whichy)
 277 {
 278     static int i, j, a, b, c, patch_size, stepsize;
 279
 280
 281     numtris[whichx][whichy] = 0;
 282
 283     patch_size = size / subdivision;
 284
 285     stepsize = 1;
 286     c = whichx * patch_elements + whichy * patch_elements * subdivision;
 287     for (i = patch_size * whichx; i < patch_size * (whichx + 1); i += stepsize) {
 288         for (j = patch_size * whichy; j < patch_size * (whichy + 1); j += stepsize) {
 289             a = (i - ((float)size / subdivision * (float)whichx)) / stepsize;
 290             b = (j - ((float)size / subdivision * (float)whichy)) / stepsize;
 291             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 0] = i * scale;
 292             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 1] = heightmap[i][j] * scale;
 293             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 2] = j * scale;
 294             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 3] = colors[i][j][0];
 295             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 4] = colors[i][j][1];
 296             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 5] = colors[i][j][2];
 297             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 6] = colors[i][j][3];
 298             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 7] = i * scale * texscale + texoffsetx[i][j];
 299             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 8] = j * scale * texscale + texoffsety[i][j];
 300
 301             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 9] = i * scale;
 302             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 10] = heightmap[i][j + stepsize] * scale;
 303             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 11] = j * scale + stepsize * scale;
 304             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 12] = colors[i][j + stepsize][0];
 305             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 13] = colors[i][j + stepsize][1];
 306             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 14] = colors[i][j + stepsize][2];
 307             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 15] = colors[i][j + stepsize][3];
 308             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 16] = i * scale * texscale + texoffsetx[i][j + stepsize];
 309             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 17] = j * scale * texscale + stepsize * scale * texscale + texoffsety[i][j + stepsize];
 310
 311             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 18] = i * scale + stepsize * scale;
 312             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 19] = heightmap[i + stepsize][j] * scale;
 313             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 20] = j * scale;
 314             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 21] = colors[i + stepsize][j][0];
 315             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 22] = colors[i + stepsize][j][1];
 316             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 23] = colors[i + stepsize][j][2];
 317             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 24] = colors[i + stepsize][j][3];
 318             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 25] = i * scale * texscale + stepsize * scale * texscale + texoffsetx[i + stepsize][j];
 319             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 26] = j * scale * texscale + texoffsety[i + stepsize][j];
 320
 321             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 27] = i * scale + stepsize * scale;
 322             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 28] = heightmap[i + stepsize][j] * scale;
 323             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 29] = j * scale;
 324             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 30] = colors[i + stepsize][j][0];
 325             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 31] = colors[i + stepsize][j][1];
 326             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 32] = colors[i + stepsize][j][2];
 327             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 33] = colors[i + stepsize][j][3];
 328             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 34] = i * scale * texscale + stepsize * scale * texscale + texoffsetx[i + stepsize][j];
 329             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 35] = j * scale * texscale + texoffsety[i + stepsize][j];
 330
 331             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 36] = i * scale;
 332             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 37] = heightmap[i][j + stepsize] * scale;
 333             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 38] = j * scale + stepsize * scale;
 334             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 39] = colors[i][j + stepsize][0];
 335             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 40] = colors[i][j + stepsize][1];
 336             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 41] = colors[i][j + stepsize][2];
 337             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 42] = colors[i][j + stepsize][3];
 338             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 43] = i * scale * texscale + texoffsetx[i][j + stepsize];
 339             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 44] = j * scale * texscale + stepsize * scale * texscale + texoffsety[i][j + stepsize];
 340
 341             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 45] = i * scale + stepsize * scale;
 342             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 46] = heightmap[i + stepsize][j + stepsize] * scale;
 343             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 47] = j * scale + stepsize * scale;
 344             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 48] = colors[i + stepsize][j + stepsize][0];
 345             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 49] = colors[i + stepsize][j + stepsize][1];
 346             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 50] = colors[i + stepsize][j + stepsize][2];
 347             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 51] = colors[i + stepsize][j + stepsize][3];
 348             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 52] = i * scale * texscale + stepsize * scale * texscale + texoffsetx[i + stepsize][j + stepsize];
 349             vArray[(a * 54) + (b * 54 * patch_size / stepsize) + c + 53] = j * scale * texscale + stepsize * scale * texscale + texoffsety[i + stepsize][j + stepsize];
 350             numtris[whichx][whichy] += 2;
 351         }
 352     }
 353
 354     maxypatch[whichx][whichy] = -10000;
 355     minypatch[whichx][whichy] = 10000;
 356     for (a = 0; a < size / subdivision; a++) {
 357         for (b = 0; b < size / subdivision; b++) {
 358             if (heightmap[(size / subdivision)*whichx + a][(size / subdivision)*whichy + b]*scale > maxypatch[whichx][whichy])
 359                 maxypatch[whichx][whichy] = heightmap[(size / subdivision) * whichx + a][(size / subdivision) * whichy + b] * scale;
 360             if (heightmap[(size / subdivision)*whichx + a][(size / subdivision)*whichy + b]*scale < minypatch[whichx][whichy])
 361                 minypatch[whichx][whichy] = heightmap[(size / subdivision) * whichx + a][(size / subdivision) * whichy + b] * scale;
 362         }
 363     }
 364     heightypatch[whichx][whichy] = (maxypatch[whichx][whichy] - minypatch[whichx][whichy]);
 365     if (heightypatch[whichx][whichy] < size / subdivision * scale)
 366         heightypatch[whichx][whichy] = size / subdivision * scale;
 367     avgypatch[whichx][whichy] = (minypatch[whichx][whichy] + maxypatch[whichx][whichy]) / 2;
 368
 369     for (i = whichx * size / subdivision; i < (whichx + 1)*size / subdivision - 1; i++) {
 370         for (j = whichy * size / subdivision; j < (whichy + 1)*size / subdivision - 1; j++) {
 371             triangles[(i * (size - 1) * 2) + (j * 2)][0].x = i * scale;
 372             triangles[(i * (size - 1) * 2) + (j * 2)][0].y = heightmap[i][j] * scale;
 373             triangles[(i * (size - 1) * 2) + (j * 2)][0].z = j * scale;
 374
 375             triangles[(i * (size - 1) * 2) + (j * 2)][1].x = i * scale;
 376             triangles[(i * (size - 1) * 2) + (j * 2)][1].y = heightmap[i][j + 1] * scale;
 377             triangles[(i * (size - 1) * 2) + (j * 2)][1].z = j * scale + scale;
 378
 379             triangles[(i * (size - 1) * 2) + (j * 2)][2].x = i * scale + 1 * scale;
 380             triangles[(i * (size - 1) * 2) + (j * 2)][2].y = heightmap[i + 1][j] * scale;
 381             triangles[(i * (size - 1) * 2) + (j * 2)][2].z = j * scale;
 382
 383             triangles[(i * (size - 1) * 2) + (j * 2) + 1][0].x = i * scale + 1 * scale;
 384             triangles[(i * (size - 1) * 2) + (j * 2) + 1][0].y = heightmap[i + 1][j] * scale;
 385             triangles[(i * (size - 1) * 2) + (j * 2) + 1][0].z = j * scale;
 386
 387             triangles[(i * (size - 1) * 2) + (j * 2) + 1][1].x = i * scale;
 388             triangles[(i * (size - 1) * 2) + (j * 2) + 1][1].y = heightmap[i][j + 1] * scale;
 389             triangles[(i * (size - 1) * 2) + (j * 2) + 1][1].z = j * scale + 1 * scale;
 390
 391             triangles[(i * (size - 1) * 2) + (j * 2) + 1][2].x = i * scale + 1 * scale;
 392             triangles[(i * (size - 1) * 2) + (j * 2) + 1][2].y = heightmap[i + 1][j + 1] * scale;
 393             triangles[(i * (size - 1) * 2) + (j * 2) + 1][2].z = j * scale + 1 * scale;
 394         }
 395     }
 396
 397 }
 398
 399
 400 bool Terrain::load(const char *fileName)
 401 {
 402     static long i, j;
 403     static long x, y;
 404     static float patch_size;
 405
 406     float temptexdetail = texdetail;
 407     //LoadTGA( fileName );
 408
 409     // Fixing filename so that it works with its own os
 410     char * FixedFN = ConvertFileName(fileName);
 411
 412     unsigned char fileNamep[256];
 413     CopyCStringToPascal(FixedFN, fileNamep);
 414     //Load Image
 415     upload_image( fileNamep , 0);
 416
 417     //Is it valid?
 418     if (texture.bpp > 24) {
 419         int bytesPerPixel = texture.bpp / 8;
 420
 421         int tempnum = 0;
 422         for (i = 0; i < (long)(texture.sizeY * texture.sizeX * bytesPerPixel); i++) {
 423             if ((i + 1) % 4) {
 424                 texture.data[tempnum] = texture.data[i];
 425                 tempnum++;
 426             }
 427         }
 428     }
 429     texture.bpp = 24;
 430     if (visibleloading)
 431         Game::LoadingScreen();
 432
 433     texdetail = temptexdetail;
 434
 435     size = texture.sizeX;
 436
 437     for (i = 0; i < size; i++) {
 438         for (j = 0; j < size; j++) {
 439             heightmap[size - 1 - i][j] = (float)((texture.data[(i + (j * size)) * texture.bpp / 8])) / 5;
 440         }
 441     }
 442
 443     if (visibleloading)
 444         Game::LoadingScreen();
 445
 446     float slopeness;
 447
 448     for (i = 0; i < subdivision; i++) {
 449         for (j = 0; j < subdivision; j++) {
 450             textureness[i][j] = -1;
 451         }
 452     }
 453     if (visibleloading)
 454         Game::LoadingScreen();
 455
 456
 457     for (i = 0; i < size; i++) {
 458         for (j = 0; j < size; j++) {
 459             heightmap[i][j] *= .5;
 460
 461             texoffsetx[i][j] = (float)abs(Random() % 100) / 1200 / scale * 3;
 462             texoffsety[i][j] = (float)abs(Random() % 100) / 1200 / scale * 3;
 463
 464             slopeness = 0;
 465             if (environment == snowyenvironment) {
 466                 if (j != 0 && heightmap[i][j] - heightmap[i][j - 1] > slopeness) {
 467                     slopeness = heightmap[i][j] - heightmap[i][j - 1];
 468                 }
 469                 opacityother[i][j] = slopeness * slopeness * 2;
 470                 if (opacityother[i][j] > 1)
 471                     opacityother[i][j] = 1;
 472                 opacityother[i][j] -= (float)abs(Random() % 100) / 300;
 473             }
 474             if (environment == desertenvironment) {
 475                 if (j != 0 && heightmap[i][j] - heightmap[i][j - 1] > slopeness) {
 476                     slopeness = heightmap[i][j] - heightmap[i][j - 1];
 477                 }
 478                 opacityother[i][j] = slopeness * slopeness * 2;
 479                 if (opacityother[i][j] > 1)
 480                     opacityother[i][j] = 1;
 481                 opacityother[i][j] -= (float)abs(Random() % 100) / 300;
 482             }
 483             if (environment == grassyenvironment) {
 484                 if (i != 0 && heightmap[i][j] - heightmap[i - 1][j] > slopeness) {
 485                     slopeness = heightmap[i][j] - heightmap[i - 1][j];
 486                 }
 487                 if (j != 0 && heightmap[i][j] - heightmap[i][j - 1] > slopeness) {
 488                     slopeness = heightmap[i][j] - heightmap[i][j - 1];
 489                 }
 490                 if (i < size - 1 && heightmap[i][j] - heightmap[i + 1][j] > slopeness) {
 491                     slopeness = heightmap[i][j] - heightmap[i + 1][j];
 492                 }
 493                 if (j < size - 1 && heightmap[i][j] - heightmap[i][j + 1] > slopeness) {
 494                     slopeness = heightmap[i][j] - heightmap[i][j + 1];
 495                 }
 496                 opacityother[i][j] = slopeness * slopeness * 10;
 497                 if (opacityother[i][j] > 1)
 498                     opacityother[i][j] = 1;
 499                 opacityother[i][j] -= (float)abs(Random() % 100) / 100;
 500             }
 501         }
 502     }
 503     if (visibleloading)
 504         Game::LoadingScreen();
 505
 506     for (i = 0; i < size; i++) {
 507         for (j = 0; j < size; j++) {
 508             if (environment == snowyenvironment) {
 509                 heightmap[i][j] -= opacityother[i][j];
 510             }
 511             if (environment == desertenvironment) {
 512                 heightmap[i][j] -= opacityother[i][j];
 513             }
 514         }
 515     }
 516     if (visibleloading)
 517         Game::LoadingScreen();
 518
 519     /*float total;
 520     int todivide;
 521     //Smooth opacityother
 522     for(i=0;i<size;i++){
 523     for(j=0;j<size;j++){
 524     total=0;
 525     todivide=0;
 526     if(i!=0){total+=opacityother[j][i-1]; todivide++;}
 527     if(i!=size-1){total+=opacityother[j][i+1]; todivide++;}
 528     if(j!=0){total+=opacityother[j-1][i]; todivide++;}
 529     if(j!=size-1){total+=opacityother[j+1][i]; todivide++;}
 530     if(i!=0&&j!=0){total+=opacityother[j-1][i-1]; todivide++;}
 531     if(i!=size-1&&j!=0){total+=opacityother[j-1][i+1]; todivide++;}
 532     if(j!=size-1&&i!=size-1){total+=opacityother[j+1][i+1]; todivide++;}
 533     if(j!=size-1&&i!=0){total+=opacityother[j+1][i-1]; todivide++;}
 534     total+=opacityother[j][i]; todivide++;
 535
 536     opacityother[j][i]=total/(float)todivide;
 537     }
 538     }*/
 539
 540
 541     for (i = 0; i < size; i++) {
 542         for (j = 0; j < size; j++) {
 543             if (opacityother[i][j] < .1)
 544                 opacityother[i][j] = 0;
 545             if (textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == -1) {
 546                 if (!opacityother[i][j])
 547                     textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = allfirst;
 548                 if (opacityother[i][j] == 1)
 549                     textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = allsecond;
 550             }
 551             if (opacityother[i][j] && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allfirst)
 552                 textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 553             if (opacityother[i][j] != 1 && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allsecond)
 554                 textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 555
 556             x = i;
 557             y = j;
 558             if (i > 0) {
 559                 i--;
 560                 if (opacityother[x][y] && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allfirst)
 561                     textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 562                 if (opacityother[x][y] != 1 && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allsecond)
 563                     textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 564                 if (opacityother[i][j] && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allfirst)
 565                     textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 566                 if (opacityother[i][j] != 1 && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allsecond)
 567                     textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 568
 569                 if (j > 0) {
 570                     j--;
 571                     if (opacityother[x][y] && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allfirst)
 572                         textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 573                     if (opacityother[x][y] != 1 && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allsecond)
 574                         textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 575                     if (opacityother[i][j] && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allfirst)
 576                         textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 577                     if (opacityother[i][j] != 1 && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allsecond)
 578                         textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 579                     j++;
 580                 }
 581
 582                 if (j < size - 1) {
 583                     j++;
 584                     if (opacityother[x][y] && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allfirst)
 585                         textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 586                     if (opacityother[x][y] != 1 && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allsecond)
 587                         textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 588                     if (opacityother[i][j] && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allfirst)
 589                         textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 590                     if (opacityother[i][j] != 1 && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allsecond)
 591                         textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 592                     j--;
 593                 }
 594                 i++;
 595             }
 596
 597             if (i < size - 1) {
 598                 i++;
 599                 if (opacityother[x][y] && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allfirst)
 600                     textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 601                 if (opacityother[x][y] != 1 && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allsecond)
 602                     textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 603                 if (opacityother[i][j] && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allfirst)
 604                     textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 605                 if (opacityother[i][j] != 1 && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allsecond)
 606                     textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 607
 608                 if (j > 0) {
 609                     j--;
 610                     if (opacityother[x][y] && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allfirst)
 611                         textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 612                     if (opacityother[x][y] != 1 && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allsecond)
 613                         textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 614                     if (opacityother[i][j] && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allfirst)
 615                         textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 616                     if (opacityother[i][j] != 1 && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allsecond)
 617                         textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 618                     j++;
 619                 }
 620
 621                 if (j < size - 1) {
 622                     j++;
 623                     if (opacityother[x][y] && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allfirst)
 624                         textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 625                     if (opacityother[x][y] != 1 && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allsecond)
 626                         textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 627                     if (opacityother[i][j] && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allfirst)
 628                         textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 629                     if (opacityother[i][j] != 1 && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allsecond)
 630                         textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 631                     j--;
 632                 }
 633                 i--;
 634             }
 635
 636             if (j > 0) {
 637                 j--;
 638                 if (opacityother[x][y] && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allfirst)
 639                     textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 640                 if (opacityother[x][y] != 1 && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allsecond)
 641                     textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 642                 if (opacityother[i][j] && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allfirst)
 643                     textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 644                 if (opacityother[i][j] != 1 && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allsecond)
 645                     textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 646                 j++;
 647             }
 648
 649             if (j < size - 1) {
 650                 j++;
 651                 if (opacityother[x][y] && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allfirst)
 652                     textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 653                 if (opacityother[x][y] != 1 && textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] == allsecond)
 654                     textureness[(int)(i * subdivision / size)][(int)(j * subdivision / size)] = mixed;
 655                 if (opacityother[i][j] && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allfirst)
 656                     textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 657                 if (opacityother[i][j] != 1 && textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] == allsecond)
 658                     textureness[(int)(x * subdivision / size)][(int)(y * subdivision / size)] = mixed;
 659                 j--;
 660
 661             }
 662         }
 663     }
 664     if (visibleloading)
 665         Game::LoadingScreen();
 666
 667     patch_size = size / subdivision;
 668     patch_elements = (patch_size) * (patch_size) * 54;
 669     CalculateNormals();
 670     /*DoShadows();
 671
 672     for(i=0;i<subdivision;i++){
 673     for(j=0;j<subdivision;j++){
 674     UpdateVertexArray(i,j);
 675     }
 676     }*/
 677
 678     return 1;
 679 }
 680
 681 void Terrain::CalculateNormals()
 682 {
 683     static int i, j;
 684     static XYZ facenormal;
 685     static XYZ p, q, a, b, c;
 686
 687     for (i = 0; i < size; i++) {
 688         for (j = 0; j < size; j++) {
 689             normals[i][j].x = 0;
 690             normals[i][j].y = 0;
 691             normals[i][j].z = 0;
 692         }
 693     }
 694
 695     for (i = 0; i < size - 1; i++) {
 696         for (j = 0; j < size - 1; j++) {
 697             a.x = i;
 698             a.y = heightmap[i][j];
 699             a.z = j;
 700             b.x = i;
 701             b.y = heightmap[i][j + 1];
 702             b.z = j + 1;
 703             c.x = i + 1;
 704             c.y = heightmap[i + 1][j];
 705             c.z = j;
 706
 707             p.x = b.x - a.x;
 708             p.y = b.y - a.y;
 709             p.z = b.z - a.z;
 710             q.x = c.x - a.x;
 711             q.y = c.y - a.y;
 712             q.z = c.z - a.z;
 713
 714             CrossProduct(&p, &q, &facenormal);
 715
 716             facenormals[i][j] = facenormal;
 717
 718             normals[i][j] = normals[i][j] + facenormal;
 719             normals[i][j + 1] = normals[i][j + 1] + facenormal;
 720             normals[i + 1][j] = normals[i + 1][j] + facenormal;
 721
 722
 723             a.x = i + 1;
 724             a.y = heightmap[i + 1][j];
 725             a.z = j;
 726             b.x = i;
 727             b.y = heightmap[i][j + 1];
 728             b.z = j + 1;
 729             c.x = i + 1;
 730             c.y = heightmap[i + 1][j + 1];
 731             c.z = j + 1;
 732
 733             p.x = b.x - a.x;
 734             p.y = b.y - a.y;
 735             p.z = b.z - a.z;
 736             q.x = c.x - a.x;
 737             q.y = c.y - a.y;
 738             q.z = c.z - a.z;
 739
 740             CrossProduct(&p, &q, &facenormal);
 741
 742             normals[i + 1][j + 1] = normals[i + 1][j + 1] + facenormal;
 743             normals[i][j + 1] = normals[i][j + 1] + facenormal;
 744             normals[i + 1][j] = normals[i + 1][j] + facenormal;
 745
 746             Normalise(&facenormals[i][j]);
 747         }
 748     }
 749
 750     for (i = 0; i < size; i++) {
 751         for (j = 0; j < size; j++) {
 752             Normalise(&normals[i][j]);
 753         }
 754     }
 755 }
 756
 757 void Terrain::drawpatch(int whichx, int whichy, float opacity)
 758 {
 759     if (opacity >= 1)
 760         glDisable(GL_BLEND);
 761     if (opacity < 1) {
 762         glEnable(GL_BLEND);
 763         UpdateTransparency(whichx, whichy);
 764     }
 765     glColor4f(1, 1, 1, 1);
 766     //Set up vertex array
 767     glEnableClientState(GL_VERTEX_ARRAY);
 768     glEnableClientState(GL_COLOR_ARRAY);
 769     glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 770     glVertexPointer(3, GL_FLOAT, 9 * sizeof(GLfloat), &vArray[0 + whichx * patch_elements + whichy * patch_elements * subdivision]);
 771     glColorPointer(4, GL_FLOAT, 9 * sizeof(GLfloat), &vArray[3 + whichx * patch_elements + whichy * patch_elements * subdivision]);
 772     glTexCoordPointer(2, GL_FLOAT, 9 * sizeof(GLfloat), &vArray[7 + whichx * patch_elements + whichy * patch_elements * subdivision]);
 773
 774     //Draw
 775     glDrawArrays(GL_TRIANGLES, 0, numtris[whichx][whichy] * 3);
 776
 777     glDisableClientState(GL_VERTEX_ARRAY);
 778     glDisableClientState(GL_COLOR_ARRAY);
 779     glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 780 }
 781
 782 void Terrain::drawpatchother(int whichx, int whichy, float opacity)
 783 {
 784     glEnable(GL_BLEND);
 785     if (opacity < 1) {
 786         UpdateTransparency(whichx, whichy);
 787     }
 788     UpdateTransparencyother(whichx, whichy);
 789     glColor4f(1, 1, 1, 1);
 790     //Set up vertex array
 791     glEnableClientState(GL_VERTEX_ARRAY);
 792     glEnableClientState(GL_COLOR_ARRAY);
 793     glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 794     glVertexPointer(3, GL_FLOAT, 9 * sizeof(GLfloat), &vArray[0 + whichx * patch_elements + whichy * patch_elements * subdivision]);
 795     glColorPointer(4, GL_FLOAT, 9 * sizeof(GLfloat), &vArray[3 + whichx * patch_elements + whichy * patch_elements * subdivision]);
 796     glTexCoordPointer(2, GL_FLOAT, 9 * sizeof(GLfloat), &vArray[7 + whichx * patch_elements + whichy * patch_elements * subdivision]);
 797
 798     //Draw
 799     glDrawArrays(GL_TRIANGLES, 0, numtris[whichx][whichy] * 3);
 800
 801     glDisableClientState(GL_VERTEX_ARRAY);
 802     glDisableClientState(GL_COLOR_ARRAY);
 803     glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 804 }
 805
 806 void Terrain::drawpatchotherother(int whichx, int whichy, float opacity)
 807 {
 808     glEnable(GL_BLEND);
 809     UpdateTransparencyotherother(whichx, whichy);
 810
 811     glMatrixMode(GL_TEXTURE);
 812     glPushMatrix();
 813     glScalef(6, 6, 6);
 814
 815     glColor4f(1, 1, 1, 1);
 816
 817     //Set up vertex array
 818     glEnableClientState(GL_VERTEX_ARRAY);
 819     glEnableClientState(GL_COLOR_ARRAY);
 820     glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 821     glVertexPointer(3, GL_FLOAT, 9 * sizeof(GLfloat), &vArray[0 + whichx * patch_elements + whichy * patch_elements * subdivision]);
 822     glColorPointer(4, GL_FLOAT, 9 * sizeof(GLfloat), &vArray[3 + whichx * patch_elements + whichy * patch_elements * subdivision]);
 823     glTexCoordPointer(2, GL_FLOAT, 9 * sizeof(GLfloat), &vArray[7 + whichx * patch_elements + whichy * patch_elements * subdivision]);
 824
 825     //Draw
 826     glDrawArrays(GL_TRIANGLES, 0, numtris[whichx][whichy] * 3);
 827
 828     glDisableClientState(GL_VERTEX_ARRAY);
 829     glDisableClientState(GL_COLOR_ARRAY);
 830     glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 831
 832     glPopMatrix();
 833     glMatrixMode(GL_MODELVIEW);
 834 }
 835
 836
 837 float Terrain::getHeight(float pointx, float pointz)
 838 {
 839     static int tilex, tiley;
 840     static XYZ startpoint, endpoint, intersect, triangle[3], average;
 841
 842     pointx /= scale;
 843     pointz /= scale;
 844
 845     if (pointx >= size - 1 || pointz >= size - 1 || pointx <= 0 || pointz <= 0)
 846         return 0;
 847
 848     startpoint.x = pointx;
 849     startpoint.y = -1000;
 850     startpoint.z = pointz;
 851
 852     endpoint = startpoint;
 853     endpoint.y = 1000;
 854
 855     tilex = pointx;
 856     tiley = pointz;
 857
 858     triangle[0].x = tilex;
 859     triangle[0].z = tiley;
 860     triangle[0].y = heightmap[tilex][tiley];
 861
 862     triangle[1].x = tilex + 1;
 863     triangle[1].z = tiley;
 864     triangle[1].y = heightmap[tilex + 1][tiley];
 865
 866     triangle[2].x = tilex;
 867     triangle[2].z = tiley + 1;
 868     triangle[2].y = heightmap[tilex][tiley + 1];
 869
 870     if (!LineFacetd(&startpoint, &endpoint, &triangle[0], &triangle[1], &triangle[2], &intersect)) {
 871         triangle[0].x = tilex + 1;
 872         triangle[0].z = tiley;
 873         triangle[0].y = heightmap[tilex + 1][tiley];
 874
 875         triangle[1].x = tilex + 1;
 876         triangle[1].z = tiley + 1;
 877         triangle[1].y = heightmap[tilex + 1][tiley + 1];
 878
 879         triangle[2].x = tilex;
 880         triangle[2].z = tiley + 1;
 881         triangle[2].y = heightmap[tilex][tiley + 1];
 882         LineFacetd(&startpoint, &endpoint, &triangle[0], &triangle[1], &triangle[2], &intersect);
 883     }
 884     return intersect.y * scale + getOpacity(pointx * scale, pointz * scale) / 8;
 885
 886     //height1=heightmap[tilex][tiley]*(1-(pointx-tilex))+heightmap[tilex+1][tiley]*(pointx-tilex);
 887     //height2=heightmap[tilex][tiley+1]*(1-(pointx-tilex))+heightmap[tilex+1][tiley+1]*(pointx-tilex);
 888
 889     //return height1*(1-(pointz-tiley))*scale+height2*(pointz-tiley)*scale;
 890 }
 891
 892 float Terrain::getHeightExtrude(float pointx, float pointz, float point2x, float point2z)
 893 {
 894     static int tilex, tiley;
 895     static XYZ startpoint, endpoint, intersect, triangle[3], average;
 896
 897     pointx /= scale;
 898     pointz /= scale;
 899     point2x /= scale;
 900     point2z /= scale;
 901
 902     if (pointx >= size - 1 || pointz >= size - 1 || pointx <= 0 || pointz <= 0)
 903         return 0;
 904     if (point2x >= size - 1 || point2z >= size - 1 || point2x <= 0 || point2z <= 0)
 905         return 0;
 906
 907     startpoint.x = point2x;
 908     startpoint.y = -1000;
 909     startpoint.z = point2z;
 910
 911     endpoint = startpoint;
 912     endpoint.y = 1000;
 913
 914     tilex = pointx;
 915     tiley = pointz;
 916
 917     triangle[0].x = tilex;
 918     triangle[0].z = tiley;
 919     triangle[0].y = heightmap[tilex][tiley];
 920
 921     triangle[1].x = tilex + 1;
 922     triangle[1].z = tiley;
 923     triangle[1].y = heightmap[tilex + 1][tiley];
 924
 925     triangle[2].x = tilex;
 926     triangle[2].z = tiley + 1;
 927     triangle[2].y = heightmap[tilex][tiley + 1];
 928
 929     XYZ mid;
 930
 931     mid = (triangle[0] + triangle[1] + triangle[2]) / 2;
 932
 933     triangle[0] = mid + (triangle[0] - mid) * 10;
 934     triangle[1] = mid + (triangle[0] - mid) * 10;
 935     triangle[2] = mid + (triangle[0] - mid) * 10;
 936
 937     /*
 938     if(!LineFacetd(&startpoint,&endpoint,&triangle[0],&triangle[1],&triangle[2],&intersect)){
 939     triangle[0].x=tilex+1;
 940     triangle[0].z=tiley;
 941     triangle[0].y=heightmap[tilex+1][tiley];
 942
 943     triangle[1].x=tilex+1;
 944     triangle[1].z=tiley+1;
 945     triangle[1].y=heightmap[tilex+1][tiley+1];
 946
 947     triangle[2].x=tilex;
 948     triangle[2].z=tiley+1;
 949     triangle[2].y=heightmap[tilex][tiley+1];
 950     LineFacetd(&startpoint,&endpoint,&triangle[0],&triangle[1],&triangle[2],&intersect);
 951     }*/
 952     return intersect.y * scale + getOpacity(pointx * scale, pointz * scale) / 8;
 953
 954     //height1=heightmap[tilex][tiley]*(1-(pointx-tilex))+heightmap[tilex+1][tiley]*(pointx-tilex);
 955     //height2=heightmap[tilex][tiley+1]*(1-(pointx-tilex))+heightmap[tilex+1][tiley+1]*(pointx-tilex);
 956
 957     //return height1*(1-(pointz-tiley))*scale+height2*(pointz-tiley)*scale;
 958 }
 959
 960
 961 float Terrain::getOpacity(float pointx, float pointz)
 962 {
 963     static float height1, height2;
 964     static int tilex, tiley;
 965
 966     pointx /= scale;
 967     pointz /= scale;
 968
 969     if (pointx >= size - 1 || pointz >= size - 1 || pointx <= 0 || pointz <= 0)
 970         return 0;
 971
 972     tilex = pointx;
 973     tiley = pointz;
 974
 975     height1 = opacityother[tilex][tiley] * (1 - (pointx - tilex)) + opacityother[tilex + 1][tiley] * (pointx - tilex);
 976     height2 = opacityother[tilex][tiley + 1] * (1 - (pointx - tilex)) + opacityother[tilex + 1][tiley + 1] * (pointx - tilex);
 977
 978     return height1 * (1 - (pointz - tiley)) + height2 * (pointz - tiley);
 979 }
 980
 981 XYZ Terrain::getNormal(float pointx, float pointz)
 982 {
 983     static XYZ height1, height2, total;
 984     static int tilex, tiley;
 985
 986     pointx /= scale;
 987     pointz /= scale;
 988
 989     height1 = 0;
 990     if (pointx >= size - 1 || pointz >= size - 1 || pointx <= 0 || pointz <= 0)
 991         return height1;
 992     tilex = pointx;
 993     tiley = pointz;
 994
 995     height1 = normals[tilex][tiley] * (1 - (pointx - tilex)) + normals[tilex + 1][tiley] * (pointx - tilex);
 996     height2 = normals[tilex][tiley + 1] * (1 - (pointx - tilex)) + normals[tilex + 1][tiley + 1] * (pointx - tilex);
 997     total = height1 * (1 - (pointz - tiley)) + height2 * (pointz - tiley);
 998     Normalise(&total);
 999     return total;
1000 }
1001
1002 XYZ Terrain::getLighting(float pointx, float pointz)
1003 {
1004     static XYZ height1, height2;
1005     static int tilex, tiley;
1006
1007     pointx /= scale;
1008     pointz /= scale;
1009
1010     height1 = 0;
1011     if (pointx >= size - 1 || pointz >= size - 1 || pointx <= 0 || pointz <= 0)
1012         return height1;
1013     tilex = pointx;
1014     tiley = pointz;
1015
1016     height1.x = colors[tilex][tiley][0] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley][0] * (pointx - tilex);
1017     height1.y = colors[tilex][tiley][1] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley][1] * (pointx - tilex);
1018     height1.z = colors[tilex][tiley][2] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley][2] * (pointx - tilex);
1019     height2.x = colors[tilex][tiley + 1][0] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley + 1][0] * (pointx - tilex);
1020     height2.y = colors[tilex][tiley + 1][1] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley + 1][1] * (pointx - tilex);
1021     height2.z = colors[tilex][tiley + 1][2] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley + 1][2] * (pointx - tilex);
1022
1023     return height1 * (1 - (pointz - tiley)) + height2 * (pointz - tiley);
1024 }
1025
1026 void Terrain::draw(int layer)
1027 {
1028     static int i, j;
1029     static float opacity;
1030     static XYZ terrainpoint;
1031     static float distance[subdivision][subdivision];
1032
1033     static int beginx, endx;
1034     static int beginz, endz;
1035
1036     static float patch_size = size / subdivision * scale;
1037     static float viewdistsquared;
1038
1039     viewdistsquared = viewdistance * viewdistance;
1040
1041     //Only nearby blocks
1042     beginx = (viewer.x - viewdistance) / (patch_size) - 1;
1043     if (beginx < 0)
1044         beginx = 0;
1045     beginz = (viewer.z - viewdistance) / (patch_size) - 1;
1046     if (beginz < 0)
1047         beginz = 0;
1048
1049     endx = (viewer.x + viewdistance) / (patch_size) + 1;
1050     if (endx > subdivision)
1051         endx = subdivision;
1052     endz = (viewer.z + viewdistance) / (patch_size) + 1;
1053     if (endz > subdivision)
1054         endz = subdivision;
1055
1056     if (!layer) {
1057         for (i = beginx; i < endx; i++) {
1058             for (j = beginz; j < endz; j++) {
1059                 terrainpoint.x = i * patch_size + (patch_size) / 2;
1060                 terrainpoint.y = viewer.y; //heightmap[i][j]*scale;
1061                 terrainpoint.z = j * patch_size + (patch_size) / 2;
1062                 distance[i][j] = distsq(&viewer, &terrainpoint);
1063             }
1064         }
1065     }
1066     for (i = beginx; i < endx; i++) {
1067         for (j = beginz; j < endz; j++) {
1068             if (distance[i][j] < (viewdistance + patch_size) * (viewdistance + patch_size)) {
1069                 opacity = 1;
1070                 if (distance[i][j] > viewdistsquared * fadestart - viewdistsquared)
1071                     opacity = 0;
1072                 if (opacity == 1 && i != subdivision)
1073                     if (distance[i + 1][j] > viewdistsquared * fadestart - viewdistsquared)
1074                         opacity = 0;
1075                 if (opacity == 1 && j != subdivision)
1076                     if (distance[i][j + 1] > viewdistsquared * fadestart - viewdistsquared)
1077                         opacity = 0;
1078                 if (opacity == 1 && j != subdivision && i != subdivision)
1079                     if (distance[i + 1][j + 1] > viewdistsquared * fadestart - viewdistsquared)
1080                         opacity = 0;
1081                 glMatrixMode(GL_MODELVIEW);
1082                 glPushMatrix();
1083                 if (frustum.CubeInFrustum(i * patch_size + patch_size * .5, avgypatch[i][j], j * patch_size + patch_size * .5, heightypatch[i][j] / 2)) {
1084                     if (environment == desertenvironment && distance[i][j] > viewdistsquared / 4)
1085                         glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, blurness);
1086                     else if (environment == desertenvironment)
1087                         glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, 0 );
1088                     if (!layer && textureness[i][j] != allsecond)
1089                         drawpatch(i, j, opacity);
1090                     if (layer == 1 && textureness[i][j] != allfirst)
1091                         drawpatchother(i, j, opacity);
1092                     if (layer == 2 && textureness[i][j] != allfirst)
1093                         drawpatchotherother(i, j, opacity);
1094                 }
1095                 glPopMatrix();
1096             }
1097         }
1098     }
1099     if (environment == desertenvironment)
1100         glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, 0 );
1101 }
1102
1103 void Terrain::drawdecals()
1104 {
1105     if (decals) {
1106         static int i;
1107         static float distancemult;
1108         static int lasttype;
1109
1110         static float viewdistsquared;
1111         static bool blend;
1112
1113         viewdistsquared = viewdistance * viewdistance;
1114         blend = 1;
1115
1116         lasttype = -1;
1117         glEnable(GL_BLEND);
1118         glDisable(GL_LIGHTING);
1119         glDisable(GL_CULL_FACE);
1120         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1121         glDepthMask(0);
1122         for (i = 0; i < numdecals; i++) {
1123             if (decaltype[i] == blooddecalfast && decalalivetime[i] < 2)
1124                 decalalivetime[i] = 2;
1125             if ((decaltype[i] == shadowdecal || decaltype[i] == shadowdecalpermanent) && decaltype[i] != lasttype) {
1126                 shadowtexture.bind();
1127                 if (!blend) {
1128                     blend = 1;
1129                     glAlphaFunc(GL_GREATER, 0.0001);
1130                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1131                 }
1132             }
1133             if (decaltype[i] == footprintdecal && decaltype[i] != lasttype) {
1134                 footprinttexture.bind();
1135                 if (!blend) {
1136                     blend = 1;
1137                     glAlphaFunc(GL_GREATER, 0.0001);
1138                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1139                 }
1140             }
1141             if (decaltype[i] == bodyprintdecal && decaltype[i] != lasttype) {
1142                 bodyprinttexture.bind();
1143                 if (!blend) {
1144                     blend = 1;
1145                     glAlphaFunc(GL_GREATER, 0.0001);
1146                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1147                 }
1148             }
1149             if ((decaltype[i] == blooddecal || decaltype[i] == blooddecalslow) && decaltype[i] != lasttype) {
1150                 bloodtexture.bind();
1151                 if (blend) {
1152                     blend = 0;
1153                     glAlphaFunc(GL_GREATER, 0.15);
1154                     glBlendFunc(GL_ONE, GL_ZERO);
1155                 }
1156             }
1157             if ((decaltype[i] == blooddecalfast) && decaltype[i] != lasttype) {
1158                 bloodtexture2.bind();
1159                 if (blend) {
1160                     blend = 0;
1161                     glAlphaFunc(GL_GREATER, 0.15);
1162                     glBlendFunc(GL_ONE, GL_ZERO);
1163                 }
1164             }
1165             if (decaltype[i] == shadowdecal || decaltype[i] == shadowdecalpermanent) {
1166                 distancemult = (viewdistsquared - (distsq(&viewer, &decalposition[i]) - (viewdistsquared * fadestart)) * (1 / (1 - fadestart))) / viewdistsquared;
1167                 if (distancemult >= 1)
1168                     glColor4f(1, 1, 1, decalopacity[i]);
1169                 if (distancemult < 1)
1170                     glColor4f(1, 1, 1, decalopacity[i]*distancemult);
1171             }
1172             if (decaltype[i] == footprintdecal || decaltype[i] == bodyprintdecal) {
1173                 distancemult = (viewdistsquared - (distsq(&viewer, &decalposition[i]) - (viewdistsquared * fadestart)) * (1 / (1 - fadestart))) / viewdistsquared;
1174                 if (distancemult >= 1) {
1175                     glColor4f(1, 1, 1, decalopacity[i]);
1176                     if (decalalivetime[i] > 3)
1177                         glColor4f(1, 1, 1, decalopacity[i] * (5 - decalalivetime[i]) / 2);
1178                 }
1179                 if (distancemult < 1) {
1180                     glColor4f(1, 1, 1, decalopacity[i]*distancemult);
1181                     if (decalalivetime[i] > 3)
1182                         glColor4f(1, 1, 1, decalopacity[i] * (5 - decalalivetime[i]) / 2 * distancemult);
1183                 }
1184             }
1185             if ((decaltype[i] == blooddecal || decaltype[i] == blooddecalfast || decaltype[i] == blooddecalslow)) {
1186                 distancemult = (viewdistsquared - (distsq(&viewer, &decalposition[i]) - (viewdistsquared * fadestart)) * (1 / (1 - fadestart))) / viewdistsquared;
1187                 if (distancemult >= 1) {
1188                     glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i]);
1189                     if (decalalivetime[i] < 4)
1190                         glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i]*decalalivetime[i]*.25);
1191                     if (decalalivetime[i] > 58)
1192                         glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i] * (60 - decalalivetime[i]) / 2);
1193                 }
1194                 if (distancemult < 1) {
1195                     glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i]*distancemult);
1196                     if (decalalivetime[i] < 4)
1197                         glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i]*decalalivetime[i]*distancemult * .25);
1198                     if (decalalivetime[i] > 58)
1199                         glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i] * (60 - decalalivetime[i]) / 2 * distancemult);
1200                 }
1201             }
1202             lasttype = decaltype[i];
1203             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
1204             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
1205
1206             glMatrixMode(GL_MODELVIEW);
1207             glPushMatrix();
1208             glBegin(GL_TRIANGLES);
1209             for (int j = 0; j < 3; j++) {
1210                 glTexCoord2f(decaltexcoords[i][j][0], decaltexcoords[i][j][1]);
1211                 glVertex3f(decalvertex[i][j].x, decalvertex[i][j].y, decalvertex[i][j].z);
1212             }
1213             glEnd();
1214             glPopMatrix();
1215         }
1216         for (i = numdecals - 1; i >= 0; i--) {
1217             decalalivetime[i] += multiplier;
1218             if (decaltype[i] == blooddecalslow)
1219                 decalalivetime[i] -= multiplier * 2 / 3;
1220             if (decaltype[i] == blooddecalfast)
1221                 decalalivetime[i] += multiplier * 4;
1222             if (decaltype[i] == shadowdecal)
1223                 DeleteDecal(i);
1224             if (decaltype[i] == footprintdecal && decalalivetime[i] >= 5)
1225                 DeleteDecal(i);
1226             if (decaltype[i] == bodyprintdecal && decalalivetime[i] >= 5)
1227                 DeleteDecal(i);
1228             if ((decaltype[i] == blooddecal || decaltype[i] == blooddecalfast || decaltype[i] == blooddecalslow) && decalalivetime[i] >= 60)
1229                 DeleteDecal(i);
1230         }
1231         glAlphaFunc(GL_GREATER, 0.0001);
1232     }
1233 }
1234
1235 void Terrain::AddObject(XYZ where, float radius, int id)
1236 {
1237     bool done;
1238     int i, j;
1239     XYZ points[4];
1240     if (id >= 0 && id < 10000)
1241         for (i = 0; i < subdivision; i++) {
1242             for (j = 0; j < subdivision; j++) {
1243                 if (patchobjectnum[i][j] < 300 - 1) {
1244                     done = 0;
1245                     points[0].x = (size / subdivision) * i;
1246                     points[0].z = (size / subdivision) * j;
1247                     points[0].y = heightmap[(int)points[0].x][(int)points[0].z];
1248                     points[1].x = (size / subdivision) * (i + 1);
1249                     points[1].z = (size / subdivision) * j;
1250                     points[1].y = heightmap[(int)points[1].x][(int)points[1].z];
1251                     points[2].x = (size / subdivision) * (i + 1);
1252                     points[2].z = (size / subdivision) * (j + 1);
1253                     points[2].y = heightmap[(int)points[2].x][(int)points[2].z];
1254                     points[3].x = (size / subdivision) * i;
1255                     points[3].z = (size / subdivision) * (j + 1);
1256                     points[3].y = heightmap[(int)points[3].x][(int)points[3].z];
1257                     points[0] *= scale;
1258                     points[1] *= scale;
1259                     points[2] *= scale;
1260                     points[3] *= scale;
1261                     if (!done && where.x + radius > points[0].x && where.x - radius < points[2].x && where.z + radius > points[0].z && where.z - radius < points[2].z) {
1262                         patchobjects[i][j][patchobjectnum[i][j]] = id;
1263                         patchobjectnum[i][j]++;
1264                         done = 1;
1265                     }
1266                 }
1267             }
1268         }
1269 }
1270
1271 void Terrain::DeleteDecal(int which)
1272 {
1273     if (decals) {
1274         decaltype[which] = decaltype[numdecals - 1];
1275         decalposition[which] = decalposition[numdecals - 1];
1276         for (int i = 0; i < 3; i++) {
1277             decalvertex[which][i] = decalvertex[numdecals - 1][i];
1278             decaltexcoords[which][i][0] = decaltexcoords[numdecals - 1][i][0];
1279             decaltexcoords[which][i][1] = decaltexcoords[numdecals - 1][i][1];
1280         }
1281         decalrotation[which] = decalrotation[numdecals - 1];
1282         decalalivetime[which] = decalalivetime[numdecals - 1];
1283         decalopacity[which] = decalopacity[numdecals - 1];
1284         decalbrightness[which] = decalbrightness[numdecals - 1];
1285         numdecals--;
1286     }
1287 }
1288
1289 void Terrain::MakeDecal(int type, XYZ where, float size, float opacity, float rotation)
1290 {
1291     if (decals) {
1292         if (opacity > 0 && size > 0) {
1293             static int patchx[4];
1294             static int patchy[4];
1295
1296             decaltexcoords[numdecals][0][0] = 1;
1297             decaltexcoords[numdecals][0][1] = 0;
1298
1299             patchx[0] = (where.x + size) / scale;
1300             patchx[1] = (where.x - size) / scale;
1301             patchx[2] = (where.x - size) / scale;
1302             patchx[3] = (where.x + size) / scale;
1303
1304             patchy[0] = (where.z - size) / scale;
1305             patchy[1] = (where.z - size) / scale;
1306             patchy[2] = (where.z + size) / scale;
1307             patchy[3] = (where.z + size) / scale;
1308
1309             /*if(patchx[1]<subdivision-1&&patchy[1]<subdivision-1&&patchx[1]>0&&patchy[1]>0)
1310             if(patchx[2]<subdivision-1&&patchy[2]<subdivision-1&&patchx[2]>0&&patchy[2]>0)
1311             if(patchx[3]<subdivision-1&&patchy[3]<subdivision-1&&patchx[3]>0&&patchy[3]>0)
1312             if(patchx[0]<subdivision-1&&patchy[0]<subdivision-1&&patchx[0]>0&&patchy[0]>0){
1313             */
1314             if ((patchx[0] != patchx[1] || patchy[0] != patchy[1]) && (patchx[0] != patchx[2] || patchy[0] != patchy[2]) && (patchx[0] != patchx[3] || patchy[0] != patchy[3])) {
1315                 MakeDecalLock(type, where, patchx[0], patchy[0], size, opacity, rotation);
1316             }
1317
1318             if ((patchx[1] != patchx[2] || patchy[1] != patchy[2]) && (patchx[1] != patchx[3] || patchy[1] != patchy[3])) {
1319                 MakeDecalLock(type, where, patchx[1], patchy[1], size, opacity, rotation);
1320             }
1321
1322             if ((patchx[2] != patchx[3] || patchy[2] != patchy[3])) {
1323                 MakeDecalLock(type, where, patchx[2], patchy[2], size, opacity, rotation);
1324             }
1325             MakeDecalLock(type, where, patchx[3], patchy[3], size, opacity, rotation);
1326         }
1327     }
1328     //}
1329 }
1330
1331 void Terrain::MakeDecalLock(int type, XYZ where, int whichx, int whichy, float size, float opacity, float rotation)
1332 {
1333     if (decals) {
1334         static float placex, placez;
1335         static XYZ rot;
1336
1337         float decalbright;
1338
1339         rot = getLighting(where.x, where.z);
1340         decalbrightness[numdecals] = (rot.x + rot.y + rot.z) / 3;
1341         if (decalbrightness[numdecals] < .4)
1342             decalbrightness[numdecals] = .4;
1343
1344         if (environment == grassyenvironment) {
1345             decalbrightness[numdecals] *= .6;
1346         }
1347
1348         if (decalbrightness[numdecals] > 1)
1349             decalbrightness[numdecals] = 1;
1350         decalbright = decalbrightness[numdecals];
1351
1352         decalposition[numdecals] = where;
1353         decaltype[numdecals] = type;
1354         decalopacity[numdecals] = opacity;
1355         decalrotation[numdecals] = rotation;
1356         decalalivetime[numdecals] = 0;
1357
1358         placex = (float)whichx * scale + scale;
1359         placez = (float)whichy * scale;
1360
1361         decaltexcoords[numdecals][0][0] = (placex - where.x) / size / 2 + .5;
1362         decaltexcoords[numdecals][0][1] = (placez - where.z) / size / 2 + .5;
1363
1364         decalvertex[numdecals][0].x = placex;
1365         decalvertex[numdecals][0].z = placez;
1366         decalvertex[numdecals][0].y = heightmap[whichx + 1][whichy] * scale + .01;
1367
1368
1369         placex = (float)whichx * scale + scale;
1370         placez = (float)whichy * scale + scale;
1371
1372         decaltexcoords[numdecals][1][0] = (placex - where.x) / size / 2 + .5;
1373         decaltexcoords[numdecals][1][1] = (placez - where.z) / size / 2 + .5;
1374
1375         decalvertex[numdecals][1].x = placex;
1376         decalvertex[numdecals][1].z = placez;
1377         decalvertex[numdecals][1].y = heightmap[whichx + 1][whichy + 1] * scale + .01;
1378
1379
1380         placex = (float)whichx * scale;
1381         placez = (float)whichy * scale + scale;
1382
1383         decaltexcoords[numdecals][2][0] = (placex - where.x) / size / 2 + .5;
1384         decaltexcoords[numdecals][2][1] = (placez - where.z) / size / 2 + .5;
1385
1386         decalvertex[numdecals][2].x = placex;
1387         decalvertex[numdecals][2].z = placez;
1388         decalvertex[numdecals][2].y = heightmap[whichx][whichy + 1] * scale + .01;
1389
1390         if (decalrotation[numdecals]) {
1391             for (int i = 0; i < 3; i++) {
1392                 rot.y = 0;
1393                 rot.x = decaltexcoords[numdecals][i][0] - .5;
1394                 rot.z = decaltexcoords[numdecals][i][1] - .5;
1395                 rot = DoRotation(rot, 0, -decalrotation[numdecals], 0);
1396                 decaltexcoords[numdecals][i][0] = rot.x + .5;
1397                 decaltexcoords[numdecals][i][1] = rot.z + .5;
1398             }
1399         }
1400
1401         if (!(decaltexcoords[numdecals][0][0] < 0 && decaltexcoords[numdecals][1][0] < 0 && decaltexcoords[numdecals][2][0] < 0))
1402             if (!(decaltexcoords[numdecals][0][1] < 0 && decaltexcoords[numdecals][1][1] < 0 && decaltexcoords[numdecals][2][1] < 0))
1403                 if (!(decaltexcoords[numdecals][0][0] > 1 && decaltexcoords[numdecals][1][0] > 1 && decaltexcoords[numdecals][2][0] > 1))
1404                     if (!(decaltexcoords[numdecals][0][1] > 1 && decaltexcoords[numdecals][1][1] > 1 && decaltexcoords[numdecals][2][1] > 1))
1405                         if (numdecals < max_decals - 1)
1406                             numdecals++;
1407
1408         decalbrightness[numdecals] = decalbright;
1409
1410         decalposition[numdecals] = where;
1411         decaltype[numdecals] = type;
1412         decalopacity[numdecals] = opacity;
1413         decalrotation[numdecals] = rotation;
1414         decalalivetime[numdecals] = 0;
1415
1416         placex = (float)whichx * scale + scale;
1417         placez = (float)whichy * scale;
1418
1419         decaltexcoords[numdecals][0][0] = (placex - where.x) / size / 2 + .5;
1420         decaltexcoords[numdecals][0][1] = (placez - where.z) / size / 2 + .5;
1421
1422         decalvertex[numdecals][0].x = placex;
1423         decalvertex[numdecals][0].z = placez;
1424         decalvertex[numdecals][0].y = heightmap[whichx + 1][whichy] * scale + .01;
1425
1426
1427         placex = (float)whichx * scale;
1428         placez = (float)whichy * scale;
1429
1430         decaltexcoords[numdecals][1][0] = (placex - where.x) / size / 2 + .5;
1431         decaltexcoords[numdecals][1][1] = (placez - where.z) / size / 2 + .5;
1432
1433         decalvertex[numdecals][1].x = placex;
1434         decalvertex[numdecals][1].z = placez;
1435         decalvertex[numdecals][1].y = heightmap[whichx][whichy] * scale + .01;
1436
1437
1438         placex = (float)whichx * scale;
1439         placez = (float)whichy * scale + scale;
1440
1441         decaltexcoords[numdecals][2][0] = (placex - where.x) / size / 2 + .5;
1442         decaltexcoords[numdecals][2][1] = (placez - where.z) / size / 2 + .5;
1443
1444         decalvertex[numdecals][2].x = placex;
1445         decalvertex[numdecals][2].z = placez;
1446         decalvertex[numdecals][2].y = heightmap[whichx][whichy + 1] * scale + .01;
1447
1448         if (decalrotation[numdecals]) {
1449             for (int i = 0; i < 3; i++) {
1450                 rot.y = 0;
1451                 rot.x = decaltexcoords[numdecals][i][0] - .5;
1452                 rot.z = decaltexcoords[numdecals][i][1] - .5;
1453                 rot = DoRotation(rot, 0, -decalrotation[numdecals], 0);
1454                 decaltexcoords[numdecals][i][0] = rot.x + .5;
1455                 decaltexcoords[numdecals][i][1] = rot.z + .5;
1456             }
1457         }
1458
1459         if (!(decaltexcoords[numdecals][0][0] < 0 && decaltexcoords[numdecals][1][0] < 0 && decaltexcoords[numdecals][2][0] < 0))
1460             if (!(decaltexcoords[numdecals][0][1] < 0 && decaltexcoords[numdecals][1][1] < 0 && decaltexcoords[numdecals][2][1] < 0))
1461                 if (!(decaltexcoords[numdecals][0][0] > 1 && decaltexcoords[numdecals][1][0] > 1 && decaltexcoords[numdecals][2][0] > 1))
1462                     if (!(decaltexcoords[numdecals][0][1] > 1 && decaltexcoords[numdecals][1][1] > 1 && decaltexcoords[numdecals][2][1] > 1))
1463                         if (numdecals < max_decals - 1)
1464                             numdecals++;
1465     }
1466 }
1467
1468 void Terrain::DoLighting()
1469 {
1470     static int i, j, k, todivide;
1471     static float brightness, total;
1472     static XYZ blank, terrainpoint, lightloc;
1473     lightloc = light.location;
1474     Normalise(&lightloc);
1475     //Calculate shadows
1476     for (i = 0; i < size; i++) {
1477         for (j = 0; j < size; j++) {
1478             terrainpoint.x = (float)i * scale;
1479             terrainpoint.z = (float)j * scale;
1480             terrainpoint.y = heightmap[i][j] * scale + .1;
1481             /*brightness=0;
1482             if(lineTerrain(lightlocation*10+terrainpoint,terrainpoint,&blank)==-1)
1483             */
1484             brightness = dotproduct(&lightloc, &normals[i][j]);
1485
1486             if (brightness > 1)
1487                 brightness = 1;
1488             if (brightness < 0)
1489                 brightness = 0;
1490
1491             colors[i][j][0] = light.color[0] * brightness + light.ambient[0];
1492             colors[i][j][1] = light.color[1] * brightness + light.ambient[1];
1493             colors[i][j][2] = light.color[2] * brightness + light.ambient[2];
1494
1495             if (colors[i][j][0] > 1) colors[i][j][0] = 1;
1496             if (colors[i][j][1] > 1) colors[i][j][1] = 1;
1497             if (colors[i][j][2] > 1) colors[i][j][2] = 1;
1498             if (colors[i][j][0] < 0) colors[i][j][0] = 0;
1499             if (colors[i][j][1] < 0) colors[i][j][1] = 0;
1500             if (colors[i][j][2] < 0) colors[i][j][2] = 0;
1501         }
1502     }
1503
1504     //Smooth shadows
1505     for (i = 0; i < size; i++) {
1506         for (j = 0; j < size; j++) {
1507             for (k = 0; k < 3; k++) {
1508                 total = 0;
1509                 todivide = 0;
1510                 if (i != 0) {
1511                     total += colors[j][i - 1][k];
1512                     todivide++;
1513                 }
1514                 if (i != size - 1) {
1515                     total += colors[j][i + 1][k];
1516                     todivide++;
1517                 }
1518                 if (j != 0) {
1519                     total += colors[j - 1][i][k];
1520                     todivide++;
1521                 }
1522                 if (j != size - 1) {
1523                     total += colors[j + 1][i][k];
1524                     todivide++;
1525                 }
1526                 if (i != 0 && j != 0) {
1527                     total += colors[j - 1][i - 1][k];
1528                     todivide++;
1529                 }
1530                 if (i != size - 1 && j != 0) {
1531                     total += colors[j - 1][i + 1][k];
1532                     todivide++;
1533                 }
1534                 if (j != size - 1 && i != size - 1) {
1535                     total += colors[j + 1][i + 1][k];
1536                     todivide++;
1537                 }
1538                 if (j != size - 1 && i != 0) {
1539                     total += colors[j + 1][i - 1][k];
1540                     todivide++;
1541                 }
1542                 total += colors[j][i][k];
1543                 todivide++;
1544
1545                 colors[j][i][k] = total / todivide;
1546             }
1547         }
1548     }
1549 }
1550
1551 void Terrain::DoShadows()
1552 {
1553     static int i, j, k, l, todivide;
1554     static float brightness, total;
1555     static XYZ testpoint, testpoint2, terrainpoint, lightloc, col;
1556     lightloc = light.location;
1557     if (!skyboxtexture) {
1558         lightloc.x = 0;
1559         lightloc.z = 0;
1560     }
1561     if (skyboxtexture && tutoriallevel) {
1562         lightloc.x *= .4;
1563         lightloc.z *= .4;
1564     }
1565     int patchx, patchz;
1566     float shadowed;
1567     Normalise(&lightloc);
1568     //Calculate shadows
1569     for (i = 0; i < size; i++) {
1570         for (j = 0; j < size; j++) {
1571             terrainpoint.x = (float)(i) * scale;
1572             terrainpoint.z = (float)(j) * scale;
1573             terrainpoint.y = heightmap[i][j] * scale;
1574
1575             shadowed = 0;
1576             patchx = (float)(i) * subdivision / size;
1577             patchz = (float)(j) * subdivision / size;
1578             if (patchobjectnum[patchx][patchz]) {
1579                 for (k = 0; k < patchobjectnum[patchx][patchz]; k++) {
1580                     l = patchobjects[patchx][patchz][k];
1581                     if (objects.type[l] != treetrunktype) {
1582                         testpoint = terrainpoint;
1583                         testpoint2 = terrainpoint + lightloc * 50 * (1 - shadowed);
1584                         if (objects.model[l].LineCheck(&testpoint, &testpoint2, &col, &objects.position[l], &objects.yaw[l]) != -1) {
1585                             shadowed = 1 - (findDistance(&terrainpoint, &col) / 50);
1586                         }
1587                     }
1588                 }
1589                 if (visibleloading)
1590                     Game::LoadingScreen();
1591             }
1592             brightness = dotproduct(&lightloc, &normals[i][j]);
1593             if (shadowed)
1594                 brightness *= 1 - shadowed;
1595
1596             if (brightness > 1)
1597                 brightness = 1;
1598             if (brightness < 0)
1599                 brightness = 0;
1600
1601             colors[i][j][0] = light.color[0] * brightness + light.ambient[0];
1602             colors[i][j][1] = light.color[1] * brightness + light.ambient[1];
1603             colors[i][j][2] = light.color[2] * brightness + light.ambient[2];
1604
1605             if (colors[i][j][0] > 1) colors[i][j][0] = 1;
1606             if (colors[i][j][1] > 1) colors[i][j][1] = 1;
1607             if (colors[i][j][2] > 1) colors[i][j][2] = 1;
1608             if (colors[i][j][0] < 0) colors[i][j][0] = 0;
1609             if (colors[i][j][1] < 0) colors[i][j][1] = 0;
1610             if (colors[i][j][2] < 0) colors[i][j][2] = 0;
1611         }
1612     }
1613
1614     if (visibleloading)
1615         Game::LoadingScreen();
1616
1617     //Smooth shadows
1618     for (i = 0; i < size; i++) {
1619         for (j = 0; j < size; j++) {
1620             for (k = 0; k < 3; k++) {
1621                 total = 0;
1622                 todivide = 0;
1623                 if (i != 0) {
1624                     total += colors[j][i - 1][k];
1625                     todivide++;
1626                 }
1627                 if (i != size - 1) {
1628                     total += colors[j][i + 1][k];
1629                     todivide++;
1630                 }
1631                 if (j != 0) {
1632                     total += colors[j - 1][i][k];
1633                     todivide++;
1634                 }
1635                 if (j != size - 1) {
1636                     total += colors[j + 1][i][k];
1637                     todivide++;
1638                 }
1639                 if (i != 0 && j != 0) {
1640                     total += colors[j - 1][i - 1][k];
1641                     todivide++;
1642                 }
1643                 if (i != size - 1 && j != 0) {
1644                     total += colors[j - 1][i + 1][k];
1645                     todivide++;
1646                 }
1647                 if (j != size - 1 && i != size - 1) {
1648                     total += colors[j + 1][i + 1][k];
1649                     todivide++;
1650                 }
1651                 if (j != size - 1 && i != 0) {
1652                     total += colors[j + 1][i - 1][k];
1653                     todivide++;
1654                 }
1655                 total += colors[j][i][k];
1656                 todivide++;
1657
1658                 colors[j][i][k] = total / todivide;
1659             }
1660         }
1661     }
1662
1663     for (i = 0; i < subdivision; i++) {
1664         for (j = 0; j < subdivision; j++) {
1665             UpdateVertexArray(i, j);
1666         }
1667     }
1668 }
1669
1670 Terrain::Terrain()
1671 {
1672     size = 0;
1673
1674     memset(patchobjectnum, 0, sizeof(patchobjectnum));
1675     memset(patchobjects, 0, sizeof(patchobjects));
1676
1677     scale = 1.0f;
1678     type = 0;
1679     memset(heightmap, 0, sizeof(heightmap));
1680     memset(normals, 0, sizeof(normals));
1681     memset(facenormals, 0, sizeof(facenormals));
1682     memset(triangles, 0, sizeof(triangles));
1683     memset(colors, 0, sizeof(colors));
1684     memset(opacityother, 0, sizeof(opacityother));
1685     memset(texoffsetx, 0, sizeof(texoffsetx));
1686     memset(texoffsety, 0, sizeof(texoffsety));
1687     memset(numtris, 0, sizeof(numtris));
1688     memset(textureness, 0, sizeof(textureness));
1689
1690     memset(vArray, 0, sizeof(vArray));
1691
1692     memset(visible, 0, sizeof(visible));
1693     memset(avgypatch, 0, sizeof(avgypatch));
1694     memset(maxypatch, 0, sizeof(maxypatch));
1695     memset(minypatch, 0, sizeof(minypatch));
1696     memset(heightypatch, 0, sizeof(heightypatch));
1697
1698     patch_elements = 0;
1699
1700     memset(decaltexcoords, 0, sizeof(decaltexcoords));
1701     memset(decalvertex, 0, sizeof(decalvertex));
1702     memset(decaltype, 0, sizeof(decaltype));
1703     memset(decalopacity, 0, sizeof(decalopacity));
1704     memset(decalrotation, 0, sizeof(decalrotation));
1705     memset(decalalivetime, 0, sizeof(decalalivetime));
1706     memset(decalbrightness, 0, sizeof(decalbrightness));
1707     memset(decalposition, 0, sizeof(decalposition));
1708     numdecals = 0;
1709 }
1710 Terrain::~Terrain()
1711 {
1712     terraintexture.destroy();
1713     shadowtexture.destroy();
1714     bodyprinttexture.destroy();
1715     footprinttexture.destroy();
1716     bloodtexture.destroy();
1717     bloodtexture2.destroy();
1718     breaktexture.destroy();
1719 }
1720