Source/Sprite.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
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program 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.
  14
  15 See the GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20 */
  21
  22 #include "Sprite.h"
  23 #include "Person.h"
  24 #include "Game.h"
  25 extern XYZ viewer;
  26 extern float viewdistance;
  27 extern float fadestart;
  28 extern int environment;
  29 extern float texscale;
  30 extern Light light;
  31 extern float multiplier;
  32 extern float gravity;
  33 extern Terrain terrain;
  34 extern Objects objects;
  35 extern int detail;
  36 extern XYZ viewerfacing;
  37 extern int bloodtoggle;
  38 extern XYZ windvector;
  39
  40 // init statics
  41 Texture Sprite::cloudtexture;
  42 Texture Sprite::cloudimpacttexture;
  43 Texture Sprite::bloodtexture;
  44 Texture Sprite::flametexture;
  45 Texture Sprite::bloodflametexture;
  46 Texture Sprite::smoketexture;
  47 Texture Sprite::snowflaketexture;
  48 Texture Sprite::shinetexture;
  49 Texture Sprite::splintertexture;
  50 Texture Sprite::leaftexture;
  51 Texture Sprite::toothtexture;
  52
  53 float Sprite::checkdelay = 0;
  54
  55 vector<Sprite*> Sprite::sprites = vector<Sprite*>();
  56
  57 //Functions
  58 void Sprite::Draw()
  59 {
  60     int i, j, k;
  61     static float M[16];
  62     static XYZ point;
  63     static float distancemult;
  64     static int lasttype;
  65     static int lastspecial;
  66     static int whichpatchx, whichpatchz;
  67     static XYZ start, end, colpoint;
  68     static bool check;
  69     static bool blend;
  70     static float tempmult;
  71     static XYZ difference;
  72     static float lightcolor[3];
  73     static float viewdistsquared = viewdistance * viewdistance;
  74     static XYZ tempviewer;
  75
  76     tempviewer = viewer + viewerfacing * 6;
  77     check = 0;
  78
  79     lightcolor[0] = light.color[0] * .5 + light.ambient[0];
  80     lightcolor[1] = light.color[1] * .5 + light.ambient[1];
  81     lightcolor[2] = light.color[2] * .5 + light.ambient[2];
  82
  83     checkdelay -= multiplier * 10;
  84
  85     if (checkdelay <= 0) {
  86         check = 1;
  87         checkdelay = 1;
  88     }
  89
  90     lasttype = -1;
  91     lastspecial = -1;
  92     glEnable(GL_BLEND);
  93     glDisable(GL_LIGHTING);
  94     glDisable(GL_CULL_FACE);
  95     glEnable(GL_TEXTURE_2D);
  96     blend = 1;
  97     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  98     glDepthMask(0);
  99     glAlphaFunc(GL_GREATER, 0.0001);
 100     for (i = 0; i < sprites.size(); i++) {
 101         if (lasttype != sprites[i]->type) {
 102             switch (sprites[i]->type) {
 103             case cloudsprite:
 104                 cloudtexture.bind();
 105                 if (!blend) {
 106                     blend = 1;
 107                     glAlphaFunc(GL_GREATER, 0.0001);
 108                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 109                 }
 110                 break;
 111             case cloudimpactsprite:
 112                 cloudimpacttexture.bind();
 113                 if (!blend) {
 114                     blend = 1;
 115                     glAlphaFunc(GL_GREATER, 0.0001);
 116                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 117                 }
 118                 break;
 119             case breathsprite:
 120                 cloudimpacttexture.bind();
 121                 if (!blend) {
 122                     blend = 1;
 123                     glAlphaFunc(GL_GREATER, 0.0001);
 124                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 125                 }
 126                 break;
 127             case smoketype:
 128                 smoketexture.bind();
 129                 if (!blend) {
 130                     blend = 1;
 131                     glAlphaFunc(GL_GREATER, 0.0001);
 132                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 133                 }
 134                 break;
 135             case bloodsprite:
 136                 bloodtexture.bind();
 137                 if (!blend) {
 138                     blend = 1;
 139                     glAlphaFunc(GL_GREATER, 0.0001);
 140                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 141                 }
 142                 break;
 143             case splintersprite :
 144                 if (lastspecial != sprites[i]->special) {
 145                     if (sprites[i]->special == 0)
 146                         splintertexture.bind();
 147                     if (sprites[i]->special == 1)
 148                         leaftexture.bind();
 149                     if (sprites[i]->special == 2)
 150                         snowflaketexture.bind();
 151                     if (sprites[i]->special == 3)
 152                         toothtexture.bind();
 153                     if (!blend) {
 154                         blend = 1;
 155                         glAlphaFunc(GL_GREATER, 0.0001);
 156                         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 157                     }
 158                 }
 159                 break;
 160             case snowsprite:
 161                 snowflaketexture.bind();
 162                 if (!blend) {
 163                     blend = 1;
 164                     glAlphaFunc(GL_GREATER, 0.0001);
 165                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 166                 }
 167                 break;
 168             case weaponshinesprite:
 169                 shinetexture.bind();
 170                 if (blend) {
 171                     blend = 0;
 172                     glAlphaFunc(GL_GREATER, 0.001);
 173                     glBlendFunc(GL_SRC_ALPHA, GL_ONE);
 174                 }
 175                 break;
 176             case flamesprite:
 177             case weaponflamesprite:
 178                 flametexture.bind();
 179                 if (blend || lasttype == bloodflamesprite) {
 180                     blend = 0;
 181                     glAlphaFunc(GL_GREATER, 0.3);
 182                     glBlendFunc(GL_SRC_ALPHA, GL_ONE);
 183                 }
 184                 break;
 185             case bloodflamesprite:
 186                 bloodflametexture.bind();
 187                 if (blend) {
 188                     blend = 0;
 189                     glAlphaFunc(GL_GREATER, 0.3);
 190                     glBlendFunc(GL_ONE, GL_ZERO);
 191                 }
 192                 break;
 193             }
 194         }
 195         if (sprites[i]->type == snowsprite)
 196             distancemult = (144 - (distsq(&tempviewer, &sprites[i]->position) - (144 * fadestart)) * (1 / (1 - fadestart))) / 144;
 197         else
 198             distancemult = (viewdistsquared - (distsq(&viewer, &sprites[i]->position) - (viewdistsquared * fadestart)) * (1 / (1 - fadestart))) / viewdistsquared;
 199         if (sprites[i]->type == flamesprite) {
 200             if (distancemult >= 1)
 201                 glColor4f(sprites[i]->color[0], sprites[i]->color[1], sprites[i]->color[2], sprites[i]->opacity);
 202             else
 203                 glColor4f(sprites[i]->color[0], sprites[i]->color[1], sprites[i]->color[2], sprites[i]->opacity * distancemult);
 204         } else {
 205             if (distancemult >= 1)
 206                 glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], sprites[i]->opacity);
 207             else
 208                 glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], sprites[i]->opacity * distancemult);
 209         }
 210         lasttype = sprites[i]->type;
 211         lastspecial = sprites[i]->special;
 212         glMatrixMode(GL_MODELVIEW);
 213         glPushMatrix();
 214         glTranslatef(sprites[i]->position.x, sprites[i]->position.y, sprites[i]->position.z);
 215         if ((sprites[i]->type == flamesprite || sprites[i]->type == weaponflamesprite || sprites[i]->type == weaponshinesprite)) {
 216             difference = viewer - sprites[i]->position;
 217             Normalise(&difference);
 218             glTranslatef(difference.x * sprites[i]->size / 4, difference.y * sprites[i]->size / 4, difference.z * sprites[i]->size / 4);
 219         }
 220         if (sprites[i]->type == snowsprite) {
 221             glRotatef(sprites[i]->rotation * .2, 0, .3, 1);
 222             glTranslatef(1, 0, 0);
 223         }
 224         glGetFloatv(GL_MODELVIEW_MATRIX, M);
 225         point.x = M[12];
 226         point.y = M[13];
 227         point.z = M[14];
 228         glLoadIdentity();
 229         glTranslatef(point.x, point.y, point.z);
 230
 231         glRotatef(sprites[i]->rotation, 0, 0, 1);
 232
 233         if ((sprites[i]->type == flamesprite || sprites[i]->type == weaponflamesprite || sprites[i]->type == weaponshinesprite || sprites[i]->type == bloodflamesprite)) {
 234             if (sprites[i]->alivetime < .14)
 235                 glScalef(sprites[i]->alivetime / .14, sprites[i]->alivetime / .14, sprites[i]->alivetime / .14);
 236         }
 237         if (sprites[i]->type == smoketype || sprites[i]->type == snowsprite || sprites[i]->type == weaponshinesprite || sprites[i]->type == breathsprite) {
 238             if (sprites[i]->alivetime < .3) {
 239                 if (distancemult >= 1)
 240                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], sprites[i]->opacity * sprites[i]->alivetime / .3);
 241                 if (distancemult < 1)
 242                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], sprites[i]->opacity * distancemult * sprites[i]->alivetime / .3);
 243             }
 244         }
 245         if (sprites[i]->type == splintersprite && sprites[i]->special > 0 && sprites[i]->special != 3) {
 246             if (sprites[i]->alivetime < .2) {
 247                 if (distancemult >= 1)
 248                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], sprites[i]->alivetime / .2);
 249                 else
 250                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], distancemult * sprites[i]->alivetime / .2);
 251             } else {
 252                 if (distancemult >= 1)
 253                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], 1);
 254                 else
 255                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], 1);
 256             }
 257         }
 258         if (sprites[i]->type == splintersprite && (sprites[i]->special == 0 || sprites[i]->special == 3)) {
 259             if (distancemult >= 1)
 260                 glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], 1);
 261             else
 262                 glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], 1);
 263         }
 264
 265         glBegin(GL_TRIANGLES);
 266         glTexCoord2f(1.0f, 1.0f);
 267         glVertex3f( .5 * sprites[i]->size, .5 * sprites[i]->size, 0.0f);
 268         glTexCoord2f(0.0f, 1.0f);
 269         glVertex3f(-.5 * sprites[i]->size, .5 * sprites[i]->size, 0.0f);
 270         glTexCoord2f(1.0f, 0.0f);
 271         glVertex3f( .5 * sprites[i]->size, -.5 * sprites[i]->size, 0.0f);
 272         glTexCoord2f(0.0f, 0.0f);
 273         glVertex3f(-.5 * sprites[i]->size, -.5 * sprites[i]->size, 0.0f);
 274         glTexCoord2f(1.0f, 0.0f);
 275         glVertex3f( .5 * sprites[i]->size, -.5 * sprites[i]->size, 0.0f);
 276         glTexCoord2f(0.0f, 1.0f);
 277         glVertex3f(-.5 * sprites[i]->size, .5 * sprites[i]->size, 0.0f);
 278         glEnd();
 279         glPopMatrix();
 280     }
 281     tempmult = multiplier;
 282     for (i = sprites.size() - 1; i >= 0; i--) {
 283         multiplier = tempmult;
 284         if (sprites[i]->type != snowsprite) {
 285             sprites[i]->position += sprites[i]->velocity * multiplier;
 286             sprites[i]->velocity += windvector * multiplier;
 287         }
 288         if (sprites[i]->type == flamesprite || sprites[i]->type == smoketype)
 289             sprites[i]->position += windvector * multiplier / 2;
 290         if ((sprites[i]->type == flamesprite || sprites[i]->type == weaponflamesprite || sprites[i]->type == weaponshinesprite || sprites[i]->type == bloodflamesprite))
 291             multiplier *= sprites[i]->speed * .7;
 292         sprites[i]->alivetime += multiplier;
 293
 294         if (sprites[i]->type == cloudsprite || sprites[i]->type == cloudimpactsprite) {
 295             sprites[i]->opacity -= multiplier / 2;
 296             sprites[i]->size += multiplier / 2;
 297             sprites[i]->velocity.y += gravity * multiplier * .25;
 298         }
 299         if (sprites[i]->type == breathsprite) {
 300             sprites[i]->opacity -= multiplier / 2;
 301             sprites[i]->size += multiplier / 2;
 302             if (findLength(&sprites[i]->velocity) <= multiplier) {
 303                 sprites[i]->velocity = 0;
 304             } else {
 305                 XYZ slowdown;
 306                 slowdown = sprites[i]->velocity * -1;
 307                 Normalise(&slowdown);
 308                 slowdown *= multiplier;
 309                 sprites[i]->velocity += slowdown;
 310             }
 311         }
 312         if (sprites[i]->type == snowsprite) {
 313             sprites[i]->size -= multiplier / 120;
 314             sprites[i]->rotation += multiplier * 360;
 315             sprites[i]->position.y -= multiplier;
 316             sprites[i]->position += windvector * multiplier;
 317             if (sprites[i]->position.y < tempviewer.y - 6) sprites[i]->position.y += 12;
 318             if (sprites[i]->position.y > tempviewer.y + 6) sprites[i]->position.y -= 12;
 319             if (sprites[i]->position.z < tempviewer.z - 6) sprites[i]->position.z += 12;
 320             if (sprites[i]->position.z > tempviewer.z + 6) sprites[i]->position.z -= 12;
 321             if (sprites[i]->position.x < tempviewer.x - 6) sprites[i]->position.x += 12;
 322             if (sprites[i]->position.x > tempviewer.x + 6) sprites[i]->position.x -= 12;
 323         }
 324         if (sprites[i]->type == bloodsprite) {
 325             bool spritehit = 0;
 326             sprites[i]->rotation += multiplier * 100;
 327             sprites[i]->velocity.y += gravity * multiplier;
 328             if (check) {
 329                 XYZ where, startpoint, endpoint, movepoint, footpoint;
 330                 float rotationpoint;
 331                 int whichtri;
 332
 333                 for (j = 0; j < numplayers; j++) {
 334                     if (!spritehit && player[j].dead && sprites[i]->alivetime > .1) {
 335                         where = sprites[i]->oldposition;
 336                         where -= player[j].coords;
 337                         if (!player[j].skeleton.free)
 338                             where = DoRotation(where, 0, -player[j].yaw, 0);
 339                         startpoint = where;
 340                         where = sprites[i]->position;
 341                         where -= player[j].coords;
 342                         if (!player[j].skeleton.free)
 343                             where = DoRotation(where, 0, -player[j].yaw, 0);
 344                         endpoint = where;
 345
 346                         movepoint = 0;
 347                         rotationpoint = 0;
 348                         whichtri = player[j].skeleton.drawmodel.LineCheck(&startpoint, &endpoint, &footpoint, &movepoint, &rotationpoint);
 349                         if (whichtri != -1) {
 350                             spritehit = 1;
 351                             player[j].DoBloodBigWhere(0, 160, sprites[i]->oldposition);
 352                             DeleteSprite(i);
 353                         }
 354                     }
 355                 }
 356
 357                 whichpatchx = sprites[i]->position.x / (terrain.size / subdivision * terrain.scale);
 358                 whichpatchz = sprites[i]->position.z / (terrain.size / subdivision * terrain.scale);
 359                 if (whichpatchx > 0 && whichpatchz > 0 && whichpatchx < subdivision && whichpatchz < subdivision)
 360                     if (terrain.patchobjectnum[whichpatchx][whichpatchz]) {
 361                         if (!spritehit)
 362                             for (j = 0; j < terrain.patchobjectnum[whichpatchx][whichpatchz]; j++) {
 363                                 k = terrain.patchobjects[whichpatchx][whichpatchz][j];
 364                                 start = sprites[i]->oldposition;
 365                                 end = sprites[i]->position;
 366                                 if (!spritehit)
 367                                     if (objects.model[k].LineCheck(&start, &end, &colpoint, &objects.position[k], &objects.yaw[k]) != -1) {
 368                                         if (detail == 2 || (detail == 1 && abs(Random() % 4) == 0) || (detail == 0 && abs(Random() % 8) == 0))
 369                                             objects.model[k].MakeDecal(blooddecalfast, DoRotation(colpoint - objects.position[k], 0, -objects.yaw[k], 0), sprites[i]->size * 1.6/*+abs((float)(Random()%100))/2400*/, .5, Random() % 360);
 370                                         DeleteSprite(i);
 371                                         spritehit = 1;
 372                                     }
 373                             }
 374                     }
 375                 if (!spritehit)
 376                     if (sprites[i]->position.y < terrain.getHeight(sprites[i]->position.x, sprites[i]->position.z)) {
 377                         terrain.MakeDecal(blooddecalfast, sprites[i]->position, sprites[i]->size * 1.6/*+abs((float)(Random()%100))/2400*/, .6, Random() % 360);
 378                         DeleteSprite(i);
 379                     }
 380             }
 381         }
 382         if (sprites[i]->type == splintersprite) {
 383             sprites[i]->rotation += sprites[i]->rotatespeed * multiplier;
 384             sprites[i]->opacity -= multiplier / 2;
 385             if (sprites[i]->special == 0 || sprites[i]->special == 2 || sprites[i]->special == 3)
 386                 sprites[i]->velocity.y += gravity * multiplier;
 387             if (sprites[i]->special == 1)
 388                 sprites[i]->velocity.y += gravity * multiplier * .5;
 389         }
 390         if (sprites[i]->type == flamesprite || sprites[i]->type == weaponflamesprite || sprites[i]->type == weaponshinesprite || sprites[i]->type == bloodflamesprite) {
 391             sprites[i]->rotation += multiplier * sprites[i]->rotatespeed;
 392             sprites[i]->opacity -= multiplier * 5 / 4;
 393             if (sprites[i]->type != weaponshinesprite && sprites[i]->type != bloodflamesprite)
 394                 if (sprites[i]->opacity < .5 && sprites[i]->opacity + multiplier * 5 / 4 >= .5 && (abs(Random() % 4) == 0 || (sprites[i]->initialsize > 2 && Random() % 2 == 0)))
 395                     MakeSprite(smoketype, sprites[i]->position, sprites[i]->velocity, .9, .9, .6, sprites[i]->size * 1.2, .4);
 396             if (sprites[i]->alivetime > .14 && (sprites[i]->type == flamesprite)) {
 397                 sprites[i]->velocity = 0;
 398                 sprites[i]->velocity.y = 1.5;
 399             }
 400         }
 401         if (sprites[i]->type == smoketype) {
 402             sprites[i]->opacity -= multiplier / 3 / sprites[i]->initialsize;
 403             sprites[i]->color[0] -= multiplier;
 404             sprites[i]->color[1] -= multiplier;
 405             sprites[i]->color[2] -= multiplier;
 406             if (sprites[i]->color[0] < .6)
 407                 sprites[i]->color[0] = .6;
 408             if (sprites[i]->color[1] < .6)
 409                 sprites[i]->color[1] = .6;
 410             if (sprites[i]->color[2] < .6)
 411                 sprites[i]->color[2] = .6;
 412             sprites[i]->size += multiplier;
 413             sprites[i]->velocity = 0;
 414             sprites[i]->velocity.y = 1.5;
 415             sprites[i]->rotation += multiplier * sprites[i]->rotatespeed / 5;
 416         }
 417         if (sprites[i]->opacity <= 0 || sprites[i]->size <= 0)
 418             DeleteSprite(i);
 419     }
 420     if (check)
 421         for (i = sprites.size() - 1; i >= 0; i--) {
 422             sprites[i]->oldposition = sprites[i]->position;
 423         }
 424     glAlphaFunc(GL_GREATER, 0.0001);
 425     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 426 }
 427
 428 void Sprite::DeleteSprite(int i)
 429 {
 430     sprites.erase(sprites.begin() + i);
 431 }
 432
 433 void Sprite::MakeSprite(int atype, XYZ where, XYZ avelocity, float red, float green, float blue, float asize, float aopacity)
 434 {
 435     if (sprites.size() < max_sprites - 1) {
 436         sprites.push_back(new Sprite());
 437         if ((atype != bloodsprite && atype != bloodflamesprite) || bloodtoggle) {
 438             sprites.back()->special = 0;
 439             sprites.back()->type = atype;
 440             sprites.back()->position = where;
 441             sprites.back()->oldposition = where;
 442             sprites.back()->velocity = avelocity;
 443             sprites.back()->alivetime = 0;
 444             sprites.back()->opacity = aopacity;
 445             sprites.back()->size = asize;
 446             sprites.back()->initialsize = asize;
 447             sprites.back()->color[0] = red;
 448             sprites.back()->color[1] = green;
 449             sprites.back()->color[2] = blue;
 450             sprites.back()->rotatespeed = abs(Random() % 720) - 360;
 451             sprites.back()->speed = float(abs(Random() % 100)) / 200 + 1.5;
 452         }
 453     }
 454 }
 455
 456 Sprite::Sprite()
 457 {
 458     oldposition = 0;
 459     position = 0;
 460     velocity = 0;
 461     size = 0;
 462     initialsize = 0;
 463     type = 0;
 464     special = 0;
 465     memset(color, 0, sizeof(color));
 466     opacity = 0;
 467     rotation = 0;
 468     alivetime = 0;
 469     speed = 0;
 470     rotatespeed = 0;
 471 }
 472
 473 void Sprite::clearTextures()
 474 {
 475     toothtexture.destroy();
 476     cloudtexture.destroy();
 477     cloudimpacttexture.destroy();
 478     bloodtexture.destroy();
 479     flametexture.destroy();
 480     bloodflametexture.destroy();
 481     smoketexture.destroy();
 482     snowflaketexture.destroy();
 483     shinetexture.destroy();
 484     splintertexture.destroy();
 485     leaftexture.destroy();
 486 }
 487