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