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::getOpacity(float pointx, float pointz)
 893 {
 894     static float height1, height2;
 895     static int tilex, tiley;
 896
 897     pointx /= scale;
 898     pointz /= scale;
 899
 900     if (pointx >= size - 1 || pointz >= size - 1 || pointx <= 0 || pointz <= 0)
 901         return 0;
 902
 903     tilex = pointx;
 904     tiley = pointz;
 905
 906     height1 = opacityother[tilex][tiley] * (1 - (pointx - tilex)) + opacityother[tilex + 1][tiley] * (pointx - tilex);
 907     height2 = opacityother[tilex][tiley + 1] * (1 - (pointx - tilex)) + opacityother[tilex + 1][tiley + 1] * (pointx - tilex);
 908
 909     return height1 * (1 - (pointz - tiley)) + height2 * (pointz - tiley);
 910 }
 911
 912 XYZ Terrain::getNormal(float pointx, float pointz)
 913 {
 914     static XYZ height1, height2, total;
 915     static int tilex, tiley;
 916
 917     pointx /= scale;
 918     pointz /= scale;
 919
 920     height1 = 0;
 921     if (pointx >= size - 1 || pointz >= size - 1 || pointx <= 0 || pointz <= 0)
 922         return height1;
 923     tilex = pointx;
 924     tiley = pointz;
 925
 926     height1 = normals[tilex][tiley] * (1 - (pointx - tilex)) + normals[tilex + 1][tiley] * (pointx - tilex);
 927     height2 = normals[tilex][tiley + 1] * (1 - (pointx - tilex)) + normals[tilex + 1][tiley + 1] * (pointx - tilex);
 928     total = height1 * (1 - (pointz - tiley)) + height2 * (pointz - tiley);
 929     Normalise(&total);
 930     return total;
 931 }
 932
 933 XYZ Terrain::getLighting(float pointx, float pointz)
 934 {
 935     static XYZ height1, height2;
 936     static int tilex, tiley;
 937
 938     pointx /= scale;
 939     pointz /= scale;
 940
 941     height1 = 0;
 942     if (pointx >= size - 1 || pointz >= size - 1 || pointx <= 0 || pointz <= 0)
 943         return height1;
 944     tilex = pointx;
 945     tiley = pointz;
 946
 947     height1.x = colors[tilex][tiley][0] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley][0] * (pointx - tilex);
 948     height1.y = colors[tilex][tiley][1] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley][1] * (pointx - tilex);
 949     height1.z = colors[tilex][tiley][2] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley][2] * (pointx - tilex);
 950     height2.x = colors[tilex][tiley + 1][0] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley + 1][0] * (pointx - tilex);
 951     height2.y = colors[tilex][tiley + 1][1] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley + 1][1] * (pointx - tilex);
 952     height2.z = colors[tilex][tiley + 1][2] * (1 - (pointx - tilex)) + colors[tilex + 1][tiley + 1][2] * (pointx - tilex);
 953
 954     return height1 * (1 - (pointz - tiley)) + height2 * (pointz - tiley);
 955 }
 956
 957 void Terrain::draw(int layer)
 958 {
 959     static int i, j;
 960     static float opacity;
 961     static XYZ terrainpoint;
 962     static float distance[subdivision][subdivision];
 963
 964     static int beginx, endx;
 965     static int beginz, endz;
 966
 967     static float patch_size = size / subdivision * scale;
 968     static float viewdistsquared;
 969
 970     viewdistsquared = viewdistance * viewdistance;
 971
 972     //Only nearby blocks
 973     beginx = (viewer.x - viewdistance) / (patch_size) - 1;
 974     if (beginx < 0)
 975         beginx = 0;
 976     beginz = (viewer.z - viewdistance) / (patch_size) - 1;
 977     if (beginz < 0)
 978         beginz = 0;
 979
 980     endx = (viewer.x + viewdistance) / (patch_size) + 1;
 981     if (endx > subdivision)
 982         endx = subdivision;
 983     endz = (viewer.z + viewdistance) / (patch_size) + 1;
 984     if (endz > subdivision)
 985         endz = subdivision;
 986
 987     if (!layer) {
 988         for (i = beginx; i < endx; i++) {
 989             for (j = beginz; j < endz; j++) {
 990                 terrainpoint.x = i * patch_size + (patch_size) / 2;
 991                 terrainpoint.y = viewer.y; //heightmap[i][j]*scale;
 992                 terrainpoint.z = j * patch_size + (patch_size) / 2;
 993                 distance[i][j] = distsq(&viewer, &terrainpoint);
 994             }
 995         }
 996     }
 997     for (i = beginx; i < endx; i++) {
 998         for (j = beginz; j < endz; j++) {
 999             if (distance[i][j] < (viewdistance + patch_size) * (viewdistance + patch_size)) {
1000                 opacity = 1;
1001                 if (distance[i][j] > viewdistsquared * fadestart - viewdistsquared)
1002                     opacity = 0;
1003                 if (opacity == 1 && i != subdivision)
1004                     if (distance[i + 1][j] > viewdistsquared * fadestart - viewdistsquared)
1005                         opacity = 0;
1006                 if (opacity == 1 && j != subdivision)
1007                     if (distance[i][j + 1] > viewdistsquared * fadestart - viewdistsquared)
1008                         opacity = 0;
1009                 if (opacity == 1 && j != subdivision && i != subdivision)
1010                     if (distance[i + 1][j + 1] > viewdistsquared * fadestart - viewdistsquared)
1011                         opacity = 0;
1012                 glMatrixMode(GL_MODELVIEW);
1013                 glPushMatrix();
1014                 if (frustum.CubeInFrustum(i * patch_size + patch_size * .5, avgypatch[i][j], j * patch_size + patch_size * .5, heightypatch[i][j] / 2)) {
1015                     if (environment == desertenvironment && distance[i][j] > viewdistsquared / 4)
1016                         glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, blurness);
1017                     else if (environment == desertenvironment)
1018                         glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, 0 );
1019                     if (!layer && textureness[i][j] != allsecond)
1020                         drawpatch(i, j, opacity);
1021                     if (layer == 1 && textureness[i][j] != allfirst)
1022                         drawpatchother(i, j, opacity);
1023                     if (layer == 2 && textureness[i][j] != allfirst)
1024                         drawpatchotherother(i, j, opacity);
1025                 }
1026                 glPopMatrix();
1027             }
1028         }
1029     }
1030     if (environment == desertenvironment)
1031         glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, 0 );
1032 }
1033
1034 void Terrain::drawdecals()
1035 {
1036     if (decals) {
1037         static int i;
1038         static float distancemult;
1039         static int lasttype;
1040
1041         static float viewdistsquared;
1042         static bool blend;
1043
1044         viewdistsquared = viewdistance * viewdistance;
1045         blend = 1;
1046
1047         lasttype = -1;
1048         glEnable(GL_BLEND);
1049         glDisable(GL_LIGHTING);
1050         glDisable(GL_CULL_FACE);
1051         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1052         glDepthMask(0);
1053         for (i = 0; i < numdecals; i++) {
1054             if (decaltype[i] == blooddecalfast && decalalivetime[i] < 2)
1055                 decalalivetime[i] = 2;
1056             if ((decaltype[i] == shadowdecal || decaltype[i] == shadowdecalpermanent) && decaltype[i] != lasttype) {
1057                 shadowtexture.bind();
1058                 if (!blend) {
1059                     blend = 1;
1060                     glAlphaFunc(GL_GREATER, 0.0001);
1061                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1062                 }
1063             }
1064             if (decaltype[i] == footprintdecal && decaltype[i] != lasttype) {
1065                 footprinttexture.bind();
1066                 if (!blend) {
1067                     blend = 1;
1068                     glAlphaFunc(GL_GREATER, 0.0001);
1069                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1070                 }
1071             }
1072             if (decaltype[i] == bodyprintdecal && decaltype[i] != lasttype) {
1073                 bodyprinttexture.bind();
1074                 if (!blend) {
1075                     blend = 1;
1076                     glAlphaFunc(GL_GREATER, 0.0001);
1077                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1078                 }
1079             }
1080             if ((decaltype[i] == blooddecal || decaltype[i] == blooddecalslow) && decaltype[i] != lasttype) {
1081                 bloodtexture.bind();
1082                 if (blend) {
1083                     blend = 0;
1084                     glAlphaFunc(GL_GREATER, 0.15);
1085                     glBlendFunc(GL_ONE, GL_ZERO);
1086                 }
1087             }
1088             if ((decaltype[i] == blooddecalfast) && decaltype[i] != lasttype) {
1089                 bloodtexture2.bind();
1090                 if (blend) {
1091                     blend = 0;
1092                     glAlphaFunc(GL_GREATER, 0.15);
1093                     glBlendFunc(GL_ONE, GL_ZERO);
1094                 }
1095             }
1096             if (decaltype[i] == shadowdecal || decaltype[i] == shadowdecalpermanent) {
1097                 distancemult = (viewdistsquared - (distsq(&viewer, &decalposition[i]) - (viewdistsquared * fadestart)) * (1 / (1 - fadestart))) / viewdistsquared;
1098                 if (distancemult >= 1)
1099                     glColor4f(1, 1, 1, decalopacity[i]);
1100                 if (distancemult < 1)
1101                     glColor4f(1, 1, 1, decalopacity[i]*distancemult);
1102             }
1103             if (decaltype[i] == footprintdecal || decaltype[i] == bodyprintdecal) {
1104                 distancemult = (viewdistsquared - (distsq(&viewer, &decalposition[i]) - (viewdistsquared * fadestart)) * (1 / (1 - fadestart))) / viewdistsquared;
1105                 if (distancemult >= 1) {
1106                     glColor4f(1, 1, 1, decalopacity[i]);
1107                     if (decalalivetime[i] > 3)
1108                         glColor4f(1, 1, 1, decalopacity[i] * (5 - decalalivetime[i]) / 2);
1109                 }
1110                 if (distancemult < 1) {
1111                     glColor4f(1, 1, 1, decalopacity[i]*distancemult);
1112                     if (decalalivetime[i] > 3)
1113                         glColor4f(1, 1, 1, decalopacity[i] * (5 - decalalivetime[i]) / 2 * distancemult);
1114                 }
1115             }
1116             if ((decaltype[i] == blooddecal || decaltype[i] == blooddecalfast || decaltype[i] == blooddecalslow)) {
1117                 distancemult = (viewdistsquared - (distsq(&viewer, &decalposition[i]) - (viewdistsquared * fadestart)) * (1 / (1 - fadestart))) / viewdistsquared;
1118                 if (distancemult >= 1) {
1119                     glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i]);
1120                     if (decalalivetime[i] < 4)
1121                         glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i]*decalalivetime[i]*.25);
1122                     if (decalalivetime[i] > 58)
1123                         glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i] * (60 - decalalivetime[i]) / 2);
1124                 }
1125                 if (distancemult < 1) {
1126                     glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i]*distancemult);
1127                     if (decalalivetime[i] < 4)
1128                         glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i]*decalalivetime[i]*distancemult * .25);
1129                     if (decalalivetime[i] > 58)
1130                         glColor4f(decalbrightness[i], decalbrightness[i], decalbrightness[i], decalopacity[i] * (60 - decalalivetime[i]) / 2 * distancemult);
1131                 }
1132             }
1133             lasttype = decaltype[i];
1134             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
1135             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
1136
1137             glMatrixMode(GL_MODELVIEW);
1138             glPushMatrix();
1139             glBegin(GL_TRIANGLES);
1140             for (int j = 0; j < 3; j++) {
1141                 glTexCoord2f(decaltexcoords[i][j][0], decaltexcoords[i][j][1]);
1142                 glVertex3f(decalvertex[i][j].x, decalvertex[i][j].y, decalvertex[i][j].z);
1143             }
1144             glEnd();
1145             glPopMatrix();
1146         }
1147         for (i = numdecals - 1; i >= 0; i--) {
1148             decalalivetime[i] += multiplier;
1149             if (decaltype[i] == blooddecalslow)
1150                 decalalivetime[i] -= multiplier * 2 / 3;
1151             if (decaltype[i] == blooddecalfast)
1152                 decalalivetime[i] += multiplier * 4;
1153             if (decaltype[i] == shadowdecal)
1154                 DeleteDecal(i);
1155             if (decaltype[i] == footprintdecal && decalalivetime[i] >= 5)
1156                 DeleteDecal(i);
1157             if (decaltype[i] == bodyprintdecal && decalalivetime[i] >= 5)
1158                 DeleteDecal(i);
1159             if ((decaltype[i] == blooddecal || decaltype[i] == blooddecalfast || decaltype[i] == blooddecalslow) && decalalivetime[i] >= 60)
1160                 DeleteDecal(i);
1161         }
1162         glAlphaFunc(GL_GREATER, 0.0001);
1163     }
1164 }
1165
1166 void Terrain::AddObject(XYZ where, float radius, int id)
1167 {
1168     bool done;
1169     int i, j;
1170     XYZ points[4];
1171     if (id >= 0 && id < 10000)
1172         for (i = 0; i < subdivision; i++) {
1173             for (j = 0; j < subdivision; j++) {
1174                 if (patchobjectnum[i][j] < 300 - 1) {
1175                     done = 0;
1176                     points[0].x = (size / subdivision) * i;
1177                     points[0].z = (size / subdivision) * j;
1178                     points[0].y = heightmap[(int)points[0].x][(int)points[0].z];
1179                     points[1].x = (size / subdivision) * (i + 1);
1180                     points[1].z = (size / subdivision) * j;
1181                     points[1].y = heightmap[(int)points[1].x][(int)points[1].z];
1182                     points[2].x = (size / subdivision) * (i + 1);
1183                     points[2].z = (size / subdivision) * (j + 1);
1184                     points[2].y = heightmap[(int)points[2].x][(int)points[2].z];
1185                     points[3].x = (size / subdivision) * i;
1186                     points[3].z = (size / subdivision) * (j + 1);
1187                     points[3].y = heightmap[(int)points[3].x][(int)points[3].z];
1188                     points[0] *= scale;
1189                     points[1] *= scale;
1190                     points[2] *= scale;
1191                     points[3] *= scale;
1192                     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) {
1193                         patchobjects[i][j][patchobjectnum[i][j]] = id;
1194                         patchobjectnum[i][j]++;
1195                         done = 1;
1196                     }
1197                 }
1198             }
1199         }
1200 }
1201
1202 void Terrain::DeleteDecal(int which)
1203 {
1204     if (decals) {
1205         decaltype[which] = decaltype[numdecals - 1];
1206         decalposition[which] = decalposition[numdecals - 1];
1207         for (int i = 0; i < 3; i++) {
1208             decalvertex[which][i] = decalvertex[numdecals - 1][i];
1209             decaltexcoords[which][i][0] = decaltexcoords[numdecals - 1][i][0];
1210             decaltexcoords[which][i][1] = decaltexcoords[numdecals - 1][i][1];
1211         }
1212         decalrotation[which] = decalrotation[numdecals - 1];
1213         decalalivetime[which] = decalalivetime[numdecals - 1];
1214         decalopacity[which] = decalopacity[numdecals - 1];
1215         decalbrightness[which] = decalbrightness[numdecals - 1];
1216         numdecals--;
1217     }
1218 }
1219
1220 void Terrain::MakeDecal(int type, XYZ where, float size, float opacity, float rotation)
1221 {
1222     if (decals) {
1223         if (opacity > 0 && size > 0) {
1224             static int patchx[4];
1225             static int patchy[4];
1226
1227             decaltexcoords[numdecals][0][0] = 1;
1228             decaltexcoords[numdecals][0][1] = 0;
1229
1230             patchx[0] = (where.x + size) / scale;
1231             patchx[1] = (where.x - size) / scale;
1232             patchx[2] = (where.x - size) / scale;
1233             patchx[3] = (where.x + size) / scale;
1234
1235             patchy[0] = (where.z - size) / scale;
1236             patchy[1] = (where.z - size) / scale;
1237             patchy[2] = (where.z + size) / scale;
1238             patchy[3] = (where.z + size) / scale;
1239
1240             /*if(patchx[1]<subdivision-1&&patchy[1]<subdivision-1&&patchx[1]>0&&patchy[1]>0)
1241             if(patchx[2]<subdivision-1&&patchy[2]<subdivision-1&&patchx[2]>0&&patchy[2]>0)
1242             if(patchx[3]<subdivision-1&&patchy[3]<subdivision-1&&patchx[3]>0&&patchy[3]>0)
1243             if(patchx[0]<subdivision-1&&patchy[0]<subdivision-1&&patchx[0]>0&&patchy[0]>0){
1244             */
1245             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])) {
1246                 MakeDecalLock(type, where, patchx[0], patchy[0], size, opacity, rotation);
1247             }
1248
1249             if ((patchx[1] != patchx[2] || patchy[1] != patchy[2]) && (patchx[1] != patchx[3] || patchy[1] != patchy[3])) {
1250                 MakeDecalLock(type, where, patchx[1], patchy[1], size, opacity, rotation);
1251             }
1252
1253             if ((patchx[2] != patchx[3] || patchy[2] != patchy[3])) {
1254                 MakeDecalLock(type, where, patchx[2], patchy[2], size, opacity, rotation);
1255             }
1256             MakeDecalLock(type, where, patchx[3], patchy[3], size, opacity, rotation);
1257         }
1258     }
1259     //}
1260 }
1261
1262 void Terrain::MakeDecalLock(int type, XYZ where, int whichx, int whichy, float size, float opacity, float rotation)
1263 {
1264     if (decals) {
1265         static float placex, placez;
1266         static XYZ rot;
1267
1268         float decalbright;
1269
1270         rot = getLighting(where.x, where.z);
1271         decalbrightness[numdecals] = (rot.x + rot.y + rot.z) / 3;
1272         if (decalbrightness[numdecals] < .4)
1273             decalbrightness[numdecals] = .4;
1274
1275         if (environment == grassyenvironment) {
1276             decalbrightness[numdecals] *= .6;
1277         }
1278
1279         if (decalbrightness[numdecals] > 1)
1280             decalbrightness[numdecals] = 1;
1281         decalbright = decalbrightness[numdecals];
1282
1283         decalposition[numdecals] = where;
1284         decaltype[numdecals] = type;
1285         decalopacity[numdecals] = opacity;
1286         decalrotation[numdecals] = rotation;
1287         decalalivetime[numdecals] = 0;
1288
1289         placex = (float)whichx * scale + scale;
1290         placez = (float)whichy * scale;
1291
1292         decaltexcoords[numdecals][0][0] = (placex - where.x) / size / 2 + .5;
1293         decaltexcoords[numdecals][0][1] = (placez - where.z) / size / 2 + .5;
1294
1295         decalvertex[numdecals][0].x = placex;
1296         decalvertex[numdecals][0].z = placez;
1297         decalvertex[numdecals][0].y = heightmap[whichx + 1][whichy] * scale + .01;
1298
1299
1300         placex = (float)whichx * scale + scale;
1301         placez = (float)whichy * scale + scale;
1302
1303         decaltexcoords[numdecals][1][0] = (placex - where.x) / size / 2 + .5;
1304         decaltexcoords[numdecals][1][1] = (placez - where.z) / size / 2 + .5;
1305
1306         decalvertex[numdecals][1].x = placex;
1307         decalvertex[numdecals][1].z = placez;
1308         decalvertex[numdecals][1].y = heightmap[whichx + 1][whichy + 1] * scale + .01;
1309
1310
1311         placex = (float)whichx * scale;
1312         placez = (float)whichy * scale + scale;
1313
1314         decaltexcoords[numdecals][2][0] = (placex - where.x) / size / 2 + .5;
1315         decaltexcoords[numdecals][2][1] = (placez - where.z) / size / 2 + .5;
1316
1317         decalvertex[numdecals][2].x = placex;
1318         decalvertex[numdecals][2].z = placez;
1319         decalvertex[numdecals][2].y = heightmap[whichx][whichy + 1] * scale + .01;
1320
1321         if (decalrotation[numdecals]) {
1322             for (int i = 0; i < 3; i++) {
1323                 rot.y = 0;
1324                 rot.x = decaltexcoords[numdecals][i][0] - .5;
1325                 rot.z = decaltexcoords[numdecals][i][1] - .5;
1326                 rot = DoRotation(rot, 0, -decalrotation[numdecals], 0);
1327                 decaltexcoords[numdecals][i][0] = rot.x + .5;
1328                 decaltexcoords[numdecals][i][1] = rot.z + .5;
1329             }
1330         }
1331
1332         if (!(decaltexcoords[numdecals][0][0] < 0 && decaltexcoords[numdecals][1][0] < 0 && decaltexcoords[numdecals][2][0] < 0))
1333             if (!(decaltexcoords[numdecals][0][1] < 0 && decaltexcoords[numdecals][1][1] < 0 && decaltexcoords[numdecals][2][1] < 0))
1334                 if (!(decaltexcoords[numdecals][0][0] > 1 && decaltexcoords[numdecals][1][0] > 1 && decaltexcoords[numdecals][2][0] > 1))
1335                     if (!(decaltexcoords[numdecals][0][1] > 1 && decaltexcoords[numdecals][1][1] > 1 && decaltexcoords[numdecals][2][1] > 1))
1336                         if (numdecals < max_decals - 1)
1337                             numdecals++;
1338
1339         decalbrightness[numdecals] = decalbright;
1340
1341         decalposition[numdecals] = where;
1342         decaltype[numdecals] = type;
1343         decalopacity[numdecals] = opacity;
1344         decalrotation[numdecals] = rotation;
1345         decalalivetime[numdecals] = 0;
1346
1347         placex = (float)whichx * scale + scale;
1348         placez = (float)whichy * scale;
1349
1350         decaltexcoords[numdecals][0][0] = (placex - where.x) / size / 2 + .5;
1351         decaltexcoords[numdecals][0][1] = (placez - where.z) / size / 2 + .5;
1352
1353         decalvertex[numdecals][0].x = placex;
1354         decalvertex[numdecals][0].z = placez;
1355         decalvertex[numdecals][0].y = heightmap[whichx + 1][whichy] * scale + .01;
1356
1357
1358         placex = (float)whichx * scale;
1359         placez = (float)whichy * scale;
1360
1361         decaltexcoords[numdecals][1][0] = (placex - where.x) / size / 2 + .5;
1362         decaltexcoords[numdecals][1][1] = (placez - where.z) / size / 2 + .5;
1363
1364         decalvertex[numdecals][1].x = placex;
1365         decalvertex[numdecals][1].z = placez;
1366         decalvertex[numdecals][1].y = heightmap[whichx][whichy] * scale + .01;
1367
1368
1369         placex = (float)whichx * scale;
1370         placez = (float)whichy * scale + scale;
1371
1372         decaltexcoords[numdecals][2][0] = (placex - where.x) / size / 2 + .5;
1373         decaltexcoords[numdecals][2][1] = (placez - where.z) / size / 2 + .5;
1374
1375         decalvertex[numdecals][2].x = placex;
1376         decalvertex[numdecals][2].z = placez;
1377         decalvertex[numdecals][2].y = heightmap[whichx][whichy + 1] * scale + .01;
1378
1379         if (decalrotation[numdecals]) {
1380             for (int i = 0; i < 3; i++) {
1381                 rot.y = 0;
1382                 rot.x = decaltexcoords[numdecals][i][0] - .5;
1383                 rot.z = decaltexcoords[numdecals][i][1] - .5;
1384                 rot = DoRotation(rot, 0, -decalrotation[numdecals], 0);
1385                 decaltexcoords[numdecals][i][0] = rot.x + .5;
1386                 decaltexcoords[numdecals][i][1] = rot.z + .5;
1387             }
1388         }
1389
1390         if (!(decaltexcoords[numdecals][0][0] < 0 && decaltexcoords[numdecals][1][0] < 0 && decaltexcoords[numdecals][2][0] < 0))
1391             if (!(decaltexcoords[numdecals][0][1] < 0 && decaltexcoords[numdecals][1][1] < 0 && decaltexcoords[numdecals][2][1] < 0))
1392                 if (!(decaltexcoords[numdecals][0][0] > 1 && decaltexcoords[numdecals][1][0] > 1 && decaltexcoords[numdecals][2][0] > 1))
1393                     if (!(decaltexcoords[numdecals][0][1] > 1 && decaltexcoords[numdecals][1][1] > 1 && decaltexcoords[numdecals][2][1] > 1))
1394                         if (numdecals < max_decals - 1)
1395                             numdecals++;
1396     }
1397 }
1398
1399 void Terrain::DoShadows()
1400 {
1401     static int i, j, k, l, todivide;
1402     static float brightness, total;
1403     static XYZ testpoint, testpoint2, terrainpoint, lightloc, col;
1404     lightloc = light.location;
1405     if (!skyboxtexture) {
1406         lightloc.x = 0;
1407         lightloc.z = 0;
1408     }
1409     if (skyboxtexture && tutoriallevel) {
1410         lightloc.x *= .4;
1411         lightloc.z *= .4;
1412     }
1413     int patchx, patchz;
1414     float shadowed;
1415     Normalise(&lightloc);
1416     //Calculate shadows
1417     for (i = 0; i < size; i++) {
1418         for (j = 0; j < size; j++) {
1419             terrainpoint.x = (float)(i) * scale;
1420             terrainpoint.z = (float)(j) * scale;
1421             terrainpoint.y = heightmap[i][j] * scale;
1422
1423             shadowed = 0;
1424             patchx = (float)(i) * subdivision / size;
1425             patchz = (float)(j) * subdivision / size;
1426             if (patchobjectnum[patchx][patchz]) {
1427                 for (k = 0; k < patchobjectnum[patchx][patchz]; k++) {
1428                     l = patchobjects[patchx][patchz][k];
1429                     if (objects.type[l] != treetrunktype) {
1430                         testpoint = terrainpoint;
1431                         testpoint2 = terrainpoint + lightloc * 50 * (1 - shadowed);
1432                         if (objects.model[l].LineCheck(&testpoint, &testpoint2, &col, &objects.position[l], &objects.yaw[l]) != -1) {
1433                             shadowed = 1 - (findDistance(&terrainpoint, &col) / 50);
1434                         }
1435                     }
1436                 }
1437                 if (visibleloading)
1438                     Game::LoadingScreen();
1439             }
1440             brightness = dotproduct(&lightloc, &normals[i][j]);
1441             if (shadowed)
1442                 brightness *= 1 - shadowed;
1443
1444             if (brightness > 1)
1445                 brightness = 1;
1446             if (brightness < 0)
1447                 brightness = 0;
1448
1449             colors[i][j][0] = light.color[0] * brightness + light.ambient[0];
1450             colors[i][j][1] = light.color[1] * brightness + light.ambient[1];
1451             colors[i][j][2] = light.color[2] * brightness + light.ambient[2];
1452
1453             if (colors[i][j][0] > 1) colors[i][j][0] = 1;
1454             if (colors[i][j][1] > 1) colors[i][j][1] = 1;
1455             if (colors[i][j][2] > 1) colors[i][j][2] = 1;
1456             if (colors[i][j][0] < 0) colors[i][j][0] = 0;
1457             if (colors[i][j][1] < 0) colors[i][j][1] = 0;
1458             if (colors[i][j][2] < 0) colors[i][j][2] = 0;
1459         }
1460     }
1461
1462     if (visibleloading)
1463         Game::LoadingScreen();
1464
1465     //Smooth shadows
1466     for (i = 0; i < size; i++) {
1467         for (j = 0; j < size; j++) {
1468             for (k = 0; k < 3; k++) {
1469                 total = 0;
1470                 todivide = 0;
1471                 if (i != 0) {
1472                     total += colors[j][i - 1][k];
1473                     todivide++;
1474                 }
1475                 if (i != size - 1) {
1476                     total += colors[j][i + 1][k];
1477                     todivide++;
1478                 }
1479                 if (j != 0) {
1480                     total += colors[j - 1][i][k];
1481                     todivide++;
1482                 }
1483                 if (j != size - 1) {
1484                     total += colors[j + 1][i][k];
1485                     todivide++;
1486                 }
1487                 if (i != 0 && j != 0) {
1488                     total += colors[j - 1][i - 1][k];
1489                     todivide++;
1490                 }
1491                 if (i != size - 1 && j != 0) {
1492                     total += colors[j - 1][i + 1][k];
1493                     todivide++;
1494                 }
1495                 if (j != size - 1 && i != size - 1) {
1496                     total += colors[j + 1][i + 1][k];
1497                     todivide++;
1498                 }
1499                 if (j != size - 1 && i != 0) {
1500                     total += colors[j + 1][i - 1][k];
1501                     todivide++;
1502                 }
1503                 total += colors[j][i][k];
1504                 todivide++;
1505
1506                 colors[j][i][k] = total / todivide;
1507             }
1508         }
1509     }
1510
1511     for (i = 0; i < subdivision; i++) {
1512         for (j = 0; j < subdivision; j++) {
1513             UpdateVertexArray(i, j);
1514         }
1515     }
1516 }
1517
1518 Terrain::Terrain()
1519 {
1520     size = 0;
1521
1522     memset(patchobjectnum, 0, sizeof(patchobjectnum));
1523     memset(patchobjects, 0, sizeof(patchobjects));
1524
1525     scale = 1.0f;
1526     type = 0;
1527     memset(heightmap, 0, sizeof(heightmap));
1528     memset(normals, 0, sizeof(normals));
1529     memset(facenormals, 0, sizeof(facenormals));
1530     memset(triangles, 0, sizeof(triangles));
1531     memset(colors, 0, sizeof(colors));
1532     memset(opacityother, 0, sizeof(opacityother));
1533     memset(texoffsetx, 0, sizeof(texoffsetx));
1534     memset(texoffsety, 0, sizeof(texoffsety));
1535     memset(numtris, 0, sizeof(numtris));
1536     memset(textureness, 0, sizeof(textureness));
1537
1538     memset(vArray, 0, sizeof(vArray));
1539
1540     memset(visible, 0, sizeof(visible));
1541     memset(avgypatch, 0, sizeof(avgypatch));
1542     memset(maxypatch, 0, sizeof(maxypatch));
1543     memset(minypatch, 0, sizeof(minypatch));
1544     memset(heightypatch, 0, sizeof(heightypatch));
1545
1546     patch_elements = 0;
1547
1548     memset(decaltexcoords, 0, sizeof(decaltexcoords));
1549     memset(decalvertex, 0, sizeof(decalvertex));
1550     memset(decaltype, 0, sizeof(decaltype));
1551     memset(decalopacity, 0, sizeof(decalopacity));
1552     memset(decalrotation, 0, sizeof(decalrotation));
1553     memset(decalalivetime, 0, sizeof(decalalivetime));
1554     memset(decalbrightness, 0, sizeof(decalbrightness));
1555     memset(decalposition, 0, sizeof(decalposition));
1556     numdecals = 0;
1557 }
1558 Terrain::~Terrain()
1559 {
1560     terraintexture.destroy();
1561     shadowtexture.destroy();
1562     bodyprinttexture.destroy();
1563     footprinttexture.destroy();
1564     bloodtexture.destroy();
1565     bloodtexture2.destroy();
1566     breaktexture.destroy();
1567 }
1568