Source/Graphic/Sprite.cpp

   1 /*
   2 Copyright (C) 2003, 2010 - Wolfire Games
   3 Copyright (C) 2010-2016 - Lugaru contributors (see AUTHORS file)
   4
   5 This file is part of Lugaru.
   6
   7 Lugaru is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 Lugaru is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with Lugaru.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "Graphic/Sprite.hpp"
  22
  23 #include "Game.hpp"
  24 #include "Objects/Person.hpp"
  25
  26 extern XYZ viewer;
  27 extern float viewdistance;
  28 extern float fadestart;
  29 extern int environment;
  30 extern float texscale;
  31 extern Light light;
  32 extern float multiplier;
  33 extern float gravity;
  34 extern Terrain terrain;
  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 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 (unsigned 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 breathsprite:
 112                 case cloudimpactsprite:
 113                     cloudimpacttexture.bind();
 114                     if (!blend) {
 115                         blend = 1;
 116                         glAlphaFunc(GL_GREATER, 0.0001);
 117                         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 118                     }
 119                     break;
 120                 case smoketype:
 121                     smoketexture.bind();
 122                     if (!blend) {
 123                         blend = 1;
 124                         glAlphaFunc(GL_GREATER, 0.0001);
 125                         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 126                     }
 127                     break;
 128                 case bloodsprite:
 129                     bloodtexture.bind();
 130                     if (!blend) {
 131                         blend = 1;
 132                         glAlphaFunc(GL_GREATER, 0.0001);
 133                         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 134                     }
 135                     break;
 136                 case splintersprite:
 137                     if (lastspecial != sprites[i]->special) {
 138                         if (sprites[i]->special == 0)
 139                             splintertexture.bind();
 140                         if (sprites[i]->special == 1)
 141                             leaftexture.bind();
 142                         if (sprites[i]->special == 2)
 143                             snowflaketexture.bind();
 144                         if (sprites[i]->special == 3)
 145                             toothtexture.bind();
 146                         if (!blend) {
 147                             blend = 1;
 148                             glAlphaFunc(GL_GREATER, 0.0001);
 149                             glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 150                         }
 151                     }
 152                     break;
 153                 case snowsprite:
 154                     snowflaketexture.bind();
 155                     if (!blend) {
 156                         blend = 1;
 157                         glAlphaFunc(GL_GREATER, 0.0001);
 158                         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 159                     }
 160                     break;
 161                 case weaponshinesprite:
 162                     shinetexture.bind();
 163                     if (blend) {
 164                         blend = 0;
 165                         glAlphaFunc(GL_GREATER, 0.001);
 166                         glBlendFunc(GL_SRC_ALPHA, GL_ONE);
 167                     }
 168                     break;
 169                 case flamesprite:
 170                 case weaponflamesprite:
 171                     flametexture.bind();
 172                     if (blend || lasttype == bloodflamesprite) {
 173                         blend = 0;
 174                         glAlphaFunc(GL_GREATER, 0.3);
 175                         glBlendFunc(GL_SRC_ALPHA, GL_ONE);
 176                     }
 177                     break;
 178                 case bloodflamesprite:
 179                     bloodflametexture.bind();
 180                     if (blend) {
 181                         blend = 0;
 182                         glAlphaFunc(GL_GREATER, 0.3);
 183                         glBlendFunc(GL_ONE, GL_ZERO);
 184                     }
 185                     break;
 186             }
 187         }
 188         if (sprites[i]->type == snowsprite)
 189             distancemult = (144 - (distsq(&tempviewer, &sprites[i]->position) - (144 * fadestart)) * (1 / (1 - fadestart))) / 144;
 190         else
 191             distancemult = (viewdistsquared - (distsq(&viewer, &sprites[i]->position) - (viewdistsquared * fadestart)) * (1 / (1 - fadestart))) / viewdistsquared;
 192         if (sprites[i]->type == flamesprite) {
 193             if (distancemult >= 1)
 194                 glColor4f(sprites[i]->color[0], sprites[i]->color[1], sprites[i]->color[2], sprites[i]->opacity);
 195             else
 196                 glColor4f(sprites[i]->color[0], sprites[i]->color[1], sprites[i]->color[2], sprites[i]->opacity * distancemult);
 197         } else {
 198             if (distancemult >= 1)
 199                 glColor4f(sprites[i]->color[0] * lightcolor[0], sprites[i]->color[1] * lightcolor[1], sprites[i]->color[2] * lightcolor[2], sprites[i]->opacity);
 200             else
 201                 glColor4f(sprites[i]->color[0] * lightcolor[0], sprites[i]->color[1] * lightcolor[1], sprites[i]->color[2] * lightcolor[2], sprites[i]->opacity * distancemult);
 202         }
 203         lasttype = sprites[i]->type;
 204         lastspecial = sprites[i]->special;
 205         glMatrixMode(GL_MODELVIEW);
 206         glPushMatrix();
 207         glTranslatef(sprites[i]->position.x, sprites[i]->position.y, sprites[i]->position.z);
 208         if ((sprites[i]->type == flamesprite || sprites[i]->type == weaponflamesprite || sprites[i]->type == weaponshinesprite)) {
 209             difference = viewer - sprites[i]->position;
 210             Normalise(&difference);
 211             glTranslatef(difference.x * sprites[i]->size / 4, difference.y * sprites[i]->size / 4, difference.z * sprites[i]->size / 4);
 212         }
 213         if (sprites[i]->type == snowsprite) {
 214             glRotatef(sprites[i]->rotation * .2, 0, .3, 1);
 215             glTranslatef(1, 0, 0);
 216         }
 217         glGetFloatv(GL_MODELVIEW_MATRIX, M);
 218         point.x = M[12];
 219         point.y = M[13];
 220         point.z = M[14];
 221         glLoadIdentity();
 222         glTranslatef(point.x, point.y, point.z);
 223
 224         glRotatef(sprites[i]->rotation, 0, 0, 1);
 225
 226         if ((sprites[i]->type == flamesprite || sprites[i]->type == weaponflamesprite || sprites[i]->type == weaponshinesprite || sprites[i]->type == bloodflamesprite)) {
 227             if (sprites[i]->alivetime < .14)
 228                 glScalef(sprites[i]->alivetime / .14, sprites[i]->alivetime / .14, sprites[i]->alivetime / .14);
 229         }
 230         if (sprites[i]->type == smoketype || sprites[i]->type == snowsprite || sprites[i]->type == weaponshinesprite || sprites[i]->type == breathsprite) {
 231             if (sprites[i]->alivetime < .3) {
 232                 if (distancemult >= 1)
 233                     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);
 234                 if (distancemult < 1)
 235                     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);
 236             }
 237         }
 238         if (sprites[i]->type == splintersprite && sprites[i]->special > 0 && sprites[i]->special != 3) {
 239             if (sprites[i]->alivetime < .2) {
 240                 if (distancemult >= 1)
 241                     glColor4f(sprites[i]->color[0] * lightcolor[0], sprites[i]->color[1] * lightcolor[1], sprites[i]->color[2] * lightcolor[2], sprites[i]->alivetime / .2);
 242                 else
 243                     glColor4f(sprites[i]->color[0] * lightcolor[0], sprites[i]->color[1] * lightcolor[1], sprites[i]->color[2] * lightcolor[2], distancemult * sprites[i]->alivetime / .2);
 244             } else {
 245                 if (distancemult >= 1)
 246                     glColor4f(sprites[i]->color[0] * lightcolor[0], sprites[i]->color[1] * lightcolor[1], sprites[i]->color[2] * lightcolor[2], 1);
 247                 else
 248                     glColor4f(sprites[i]->color[0] * lightcolor[0], sprites[i]->color[1] * lightcolor[1], sprites[i]->color[2] * lightcolor[2], distancemult);
 249             }
 250         }
 251         if (sprites[i]->type == splintersprite && (sprites[i]->special == 0 || sprites[i]->special == 3)) {
 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], distancemult);
 256         }
 257
 258         glBegin(GL_TRIANGLES);
 259         glTexCoord2f(1.0f, 1.0f);
 260         glVertex3f(.5 * sprites[i]->size, .5 * sprites[i]->size, 0.0f);
 261         glTexCoord2f(0.0f, 1.0f);
 262         glVertex3f(-.5 * sprites[i]->size, .5 * sprites[i]->size, 0.0f);
 263         glTexCoord2f(1.0f, 0.0f);
 264         glVertex3f(.5 * sprites[i]->size, -.5 * sprites[i]->size, 0.0f);
 265         glTexCoord2f(0.0f, 0.0f);
 266         glVertex3f(-.5 * sprites[i]->size, -.5 * sprites[i]->size, 0.0f);
 267         glTexCoord2f(1.0f, 0.0f);
 268         glVertex3f(.5 * sprites[i]->size, -.5 * sprites[i]->size, 0.0f);
 269         glTexCoord2f(0.0f, 1.0f);
 270         glVertex3f(-.5 * sprites[i]->size, .5 * sprites[i]->size, 0.0f);
 271         glEnd();
 272         glPopMatrix();
 273     }
 274     tempmult = multiplier;
 275     for (int i = sprites.size() - 1; i >= 0; i--) {
 276         multiplier = tempmult;
 277         if (sprites[i]->type != snowsprite) {
 278             sprites[i]->position += sprites[i]->velocity * multiplier;
 279             sprites[i]->velocity += windvector * multiplier;
 280         }
 281         if (sprites[i]->type == flamesprite || sprites[i]->type == smoketype)
 282             sprites[i]->position += windvector * multiplier / 2;
 283         if ((sprites[i]->type == flamesprite || sprites[i]->type == weaponflamesprite || sprites[i]->type == weaponshinesprite || sprites[i]->type == bloodflamesprite))
 284             multiplier *= sprites[i]->speed * .7;
 285         sprites[i]->alivetime += multiplier;
 286
 287         if (sprites[i]->type == cloudsprite || sprites[i]->type == cloudimpactsprite) {
 288             sprites[i]->opacity -= multiplier / 2;
 289             sprites[i]->size += multiplier / 2;
 290             sprites[i]->velocity.y += gravity * multiplier * .25;
 291         }
 292         if (sprites[i]->type == breathsprite) {
 293             sprites[i]->opacity -= multiplier / 2;
 294             sprites[i]->size += multiplier / 2;
 295             if (findLength(&sprites[i]->velocity) <= multiplier) {
 296                 sprites[i]->velocity = 0;
 297             } else {
 298                 XYZ slowdown;
 299                 slowdown = sprites[i]->velocity * -1;
 300                 Normalise(&slowdown);
 301                 slowdown *= multiplier;
 302                 sprites[i]->velocity += slowdown;
 303             }
 304         }
 305         if (sprites[i]->type == snowsprite) {
 306             sprites[i]->size -= multiplier / 120;
 307             sprites[i]->rotation += multiplier * 360;
 308             sprites[i]->position.y -= multiplier;
 309             sprites[i]->position += windvector * multiplier;
 310             if (sprites[i]->position.y < tempviewer.y - 6)
 311                 sprites[i]->position.y += 12;
 312             if (sprites[i]->position.y > tempviewer.y + 6)
 313                 sprites[i]->position.y -= 12;
 314             if (sprites[i]->position.z < tempviewer.z - 6)
 315                 sprites[i]->position.z += 12;
 316             if (sprites[i]->position.z > tempviewer.z + 6)
 317                 sprites[i]->position.z -= 12;
 318             if (sprites[i]->position.x < tempviewer.x - 6)
 319                 sprites[i]->position.x += 12;
 320             if (sprites[i]->position.x > tempviewer.x + 6)
 321                 sprites[i]->position.x -= 12;
 322         }
 323         if (sprites[i]->type == bloodsprite) {
 324             bool spritehit = 0;
 325             sprites[i]->rotation += multiplier * 100;
 326             sprites[i]->velocity.y += gravity * multiplier;
 327             if (check) {
 328                 XYZ where, startpoint, endpoint, movepoint, footpoint;
 329                 float rotationpoint;
 330                 int whichtri;
 331
 332                 for (unsigned j = 0; j < Person::players.size(); j++) {
 333                     if (!spritehit && Person::players[j]->dead && sprites[i]->alivetime > .1) {
 334                         where = sprites[i]->oldposition;
 335                         where -= Person::players[j]->coords;
 336                         if (!Person::players[j]->skeleton.free)
 337                             where = DoRotation(where, 0, -Person::players[j]->yaw, 0);
 338                         startpoint = where;
 339                         where = sprites[i]->position;
 340                         where -= Person::players[j]->coords;
 341                         if (!Person::players[j]->skeleton.free)
 342                             where = DoRotation(where, 0, -Person::players[j]->yaw, 0);
 343                         endpoint = where;
 344
 345                         movepoint = 0;
 346                         rotationpoint = 0;
 347                         whichtri = Person::players[j]->skeleton.drawmodel.LineCheck(&startpoint, &endpoint, &footpoint, &movepoint, &rotationpoint);
 348                         if (whichtri != -1) {
 349                             spritehit = 1;
 350                             Person::players[j]->DoBloodBigWhere(0, 160, sprites[i]->oldposition);
 351                             DeleteSprite(i);
 352                         }
 353                     }
 354                 }
 355
 356                 whichpatchx = sprites[i]->position.x / (terrain.size / subdivision * terrain.scale);
 357                 whichpatchz = sprites[i]->position.z / (terrain.size / subdivision * terrain.scale);
 358                 if (whichpatchx > 0 && whichpatchz > 0 && whichpatchx < subdivision && whichpatchz < subdivision) {
 359                     if (!spritehit) {
 360                         for (unsigned int j = 0; j < terrain.patchobjects[whichpatchx][whichpatchz].size(); j++) {
 361                             k = terrain.patchobjects[whichpatchx][whichpatchz][j];
 362                             start = sprites[i]->oldposition;
 363                             end = sprites[i]->position;
 364                             if (!spritehit)
 365                                 if (Object::objects[k]->model.LineCheck(&start, &end, &colpoint, &Object::objects[k]->position, &Object::objects[k]->yaw) != -1) {
 366                                     if (detail == 2 || (detail == 1 && abs(Random() % 4) == 0) || (detail == 0 && abs(Random() % 8) == 0))
 367                                         Object::objects[k]->model.MakeDecal(blooddecalfast, DoRotation(colpoint - Object::objects[k]->position, 0, -Object::objects[k]->yaw, 0), sprites[i]->size * 1.6, .5, Random() % 360);
 368                                     DeleteSprite(i);
 369                                     spritehit = 1;
 370                                 }
 371                         }
 372                     }
 373                 }
 374                 if (!spritehit) {
 375                     if (sprites[i]->position.y < terrain.getHeight(sprites[i]->position.x, sprites[i]->position.z)) {
 376                         terrain.MakeDecal(blooddecalfast, sprites[i]->position, sprites[i]->size * 1.6, .6, Random() % 360);
 377                         DeleteSprite(i);
 378                     }
 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 (int 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 }