vrshoot

annotate src/psyspp.cc @ 0:b2f14e535253

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initial commit
author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 01 Feb 2014 19:58:19 +0200
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rev   line source
nuclear@0 1 #include <limits.h>
nuclear@0 2 #include "psyspp.h"
nuclear@0 3 #include "sdrman.h"
nuclear@0 4 #include "logger.h"
nuclear@0 5 #include "mesh.h" // just for the attrib enums
nuclear@0 6 #include "unistate.h"
nuclear@0 7 #include "datapath.h"
nuclear@0 8 #include "texman.h"
nuclear@0 9 #include "texgen.h"
nuclear@0 10 #include "image.h"
nuclear@0 11
nuclear@0 12 static void pdraw_start(const psys_emitter *em, void *cls);
nuclear@0 13 static void pdraw(const psys_emitter *em, const psys_particle *part, void *cls);
nuclear@0 14 static void pdraw_end(const psys_emitter *em, void *cls);
nuclear@0 15
nuclear@0 16 static unsigned int psys_load_texture(const char *fname, void *cls);
nuclear@0 17
nuclear@0 18 ParticleSystemAttributes::ParticleSystemAttributes()
nuclear@0 19 {
nuclear@0 20 tex = 0;
nuclear@0 21 own_psattr = true;
nuclear@0 22 psattr = new psys_attributes;
nuclear@0 23 psys_init_attr(psattr);
nuclear@0 24 }
nuclear@0 25
nuclear@0 26 ParticleSystemAttributes::ParticleSystemAttributes(psys_attributes *psattr)
nuclear@0 27 {
nuclear@0 28 tex = 0;
nuclear@0 29 own_psattr = false;
nuclear@0 30 this->psattr = psattr;
nuclear@0 31 }
nuclear@0 32
nuclear@0 33 ParticleSystemAttributes::~ParticleSystemAttributes()
nuclear@0 34 {
nuclear@0 35 if(own_psattr) {
nuclear@0 36 psys_destroy_attr(psattr);
nuclear@0 37 delete psattr;
nuclear@0 38 }
nuclear@0 39 }
nuclear@0 40
nuclear@0 41 ParticleSystemAttributes::ParticleSystemAttributes(const ParticleSystemAttributes &rhs)
nuclear@0 42 {
nuclear@0 43 own_psattr = true;
nuclear@0 44 tex = rhs.tex;
nuclear@0 45 psattr = new psys_attributes;
nuclear@0 46 psys_init_attr(psattr);
nuclear@0 47
nuclear@0 48 psys_copy_attr(psattr, rhs.psattr);
nuclear@0 49 }
nuclear@0 50
nuclear@0 51 ParticleSystemAttributes &ParticleSystemAttributes::operator =(const ParticleSystemAttributes &rhs)
nuclear@0 52 {
nuclear@0 53 if(&rhs != this) {
nuclear@0 54 tex = rhs.tex;
nuclear@0 55 psys_copy_attr(psattr, rhs.psattr);
nuclear@0 56 }
nuclear@0 57 return *this;
nuclear@0 58 }
nuclear@0 59
nuclear@0 60 bool ParticleSystemAttributes::load(const char *fname)
nuclear@0 61 {
nuclear@0 62 psys_texture_loader(psys_load_texture, 0, this);
nuclear@0 63 return psys_load_attr(psattr, datafile_path(fname).c_str()) != -1;
nuclear@0 64 }
nuclear@0 65
nuclear@0 66 bool ParticleSystemAttributes::load(FILE *fp)
nuclear@0 67 {
nuclear@0 68 psys_texture_loader(psys_load_texture, 0, this);
nuclear@0 69 return psys_load_attr_stream(psattr, fp) != -1;
nuclear@0 70 }
nuclear@0 71
nuclear@0 72 bool ParticleSystemAttributes::save(const char *fname) const
nuclear@0 73 {
nuclear@0 74 return psys_save_attr(psattr, fname) != -1;
nuclear@0 75 }
nuclear@0 76
nuclear@0 77 bool ParticleSystemAttributes::save(FILE *fp) const
nuclear@0 78 {
nuclear@0 79 return psys_save_attr_stream(psattr, fp) != -1;
nuclear@0 80 }
nuclear@0 81
nuclear@0 82 void ParticleSystemAttributes::set_part_color(const Vector3 &color, float t)
nuclear@0 83 {
nuclear@0 84 psys_set_value3(&psattr->part_attr.color, (anm_time_t)(t * 1000.0), v3_cons(color.x, color.y, color.z));
nuclear@0 85 }
nuclear@0 86
nuclear@0 87 void ParticleSystemAttributes::set_part_alpha(float alpha, float t)
nuclear@0 88 {
nuclear@0 89 psys_set_value(&psattr->part_attr.alpha, (anm_time_t)(t * 1000.0), alpha);
nuclear@0 90 }
nuclear@0 91
nuclear@0 92 void ParticleSystemAttributes::set_part_scale(float size, float t)
nuclear@0 93 {
nuclear@0 94 psys_set_value(&psattr->part_attr.size, (anm_time_t)(t * 1000.0), size);
nuclear@0 95 }
nuclear@0 96
nuclear@0 97
nuclear@0 98 // emmiter attributes
nuclear@0 99 void ParticleSystemAttributes::set_texture(Texture *tex)
nuclear@0 100 {
nuclear@0 101 this->tex = tex;
nuclear@0 102 psattr->tex = tex->get_id();
nuclear@0 103 }
nuclear@0 104
nuclear@0 105 Texture *ParticleSystemAttributes::get_texture() const
nuclear@0 106 {
nuclear@0 107 return tex;
nuclear@0 108 }
nuclear@0 109
nuclear@0 110 void ParticleSystemAttributes::set_spawn_range(const Vector3 &range, long tm)
nuclear@0 111 {
nuclear@0 112 psys_set_value3(&psattr->spawn_range, ANM_MSEC2TM(tm), v3_cons(range.x, range.y, range.z));
nuclear@0 113 }
nuclear@0 114
nuclear@0 115 void ParticleSystemAttributes::set_spawn_rate(float rate, long tm)
nuclear@0 116 {
nuclear@0 117 psys_set_value(&psattr->rate, ANM_MSEC2TM(tm), rate);
nuclear@0 118 }
nuclear@0 119
nuclear@0 120 float ParticleSystemAttributes::get_spawn_rate(long tm) const
nuclear@0 121 {
nuclear@0 122 return psys_get_value(&psattr->rate, ANM_MSEC2TM(tm));
nuclear@0 123 }
nuclear@0 124
nuclear@0 125 void ParticleSystemAttributes::set_life(float life, float range, long tm)
nuclear@0 126 {
nuclear@0 127 psys_set_anm_rnd(&psattr->life, ANM_MSEC2TM(tm), life, range);
nuclear@0 128 }
nuclear@0 129
nuclear@0 130 void ParticleSystemAttributes::set_size(float sz, float range, long tm)
nuclear@0 131 {
nuclear@0 132 psys_set_anm_rnd(&psattr->size, ANM_MSEC2TM(tm), sz, range);
nuclear@0 133 }
nuclear@0 134
nuclear@0 135 void ParticleSystemAttributes::set_spawn_dir(const Vector3 &dir, const Vector3 &range, long tm)
nuclear@0 136 {
nuclear@0 137 psys_set_anm_rnd3(&psattr->dir, ANM_MSEC2TM(tm), v3_cons(dir.x, dir.y, dir.z), v3_cons(range.x, range.y, range.z));
nuclear@0 138 }
nuclear@0 139
nuclear@0 140 void ParticleSystemAttributes::set_gravity(const Vector3 &grav, long tm)
nuclear@0 141 {
nuclear@0 142 psys_set_value3(&psattr->grav, ANM_MSEC2TM(tm), v3_cons(grav.x, grav.y, grav.z));
nuclear@0 143 }
nuclear@0 144
nuclear@0 145 void ParticleSystemAttributes::set_drag(float drag)
nuclear@0 146 {
nuclear@0 147 psattr->drag = drag;
nuclear@0 148 }
nuclear@0 149
nuclear@0 150 void ParticleSystemAttributes::set_particle_limit(int lim)
nuclear@0 151 {
nuclear@0 152 psattr->max_particles = lim;
nuclear@0 153 }
nuclear@0 154
nuclear@0 155
nuclear@0 156 // ---- ParticleSystem ----
nuclear@0 157
nuclear@0 158 ParticleSystem::ParticleSystem()
nuclear@0 159 : attr(&psys.attr)
nuclear@0 160 {
nuclear@0 161 psys_init(&psys);
nuclear@0 162 psys_draw_func(&psys, pdraw, pdraw_start, pdraw_end, (void*)this);
nuclear@0 163 start_time = LONG_MIN;
nuclear@0 164 last_upd_time = LONG_MIN;
nuclear@0 165 }
nuclear@0 166
nuclear@0 167 ParticleSystem::~ParticleSystem()
nuclear@0 168 {
nuclear@0 169 psys_destroy(&psys);
nuclear@0 170 }
nuclear@0 171
nuclear@0 172 void ParticleSystem::set_start_time(long tm)
nuclear@0 173 {
nuclear@0 174 start_time = tm;
nuclear@0 175 }
nuclear@0 176
nuclear@0 177 bool ParticleSystem::is_active() const
nuclear@0 178 {
nuclear@0 179 float rate = attr.get_spawn_rate(last_upd_time);
nuclear@0 180 return psys.pcount > 0 || last_upd_time == 0;// || rate > 0.0;
nuclear@0 181 }
nuclear@0 182
nuclear@0 183 ParticleSystemAttributes *ParticleSystem::get_attr()
nuclear@0 184 {
nuclear@0 185 return &attr;
nuclear@0 186 }
nuclear@0 187
nuclear@0 188 const ParticleSystemAttributes *ParticleSystem::get_attr() const
nuclear@0 189 {
nuclear@0 190 return &attr;
nuclear@0 191 }
nuclear@0 192
nuclear@0 193 void ParticleSystem::set_attr(const ParticleSystemAttributes &pattr)
nuclear@0 194 {
nuclear@0 195 attr = pattr;
nuclear@0 196 }
nuclear@0 197
nuclear@0 198 bool ParticleSystem::load(const char *fname)
nuclear@0 199 {
nuclear@0 200 psys_texture_loader(psys_load_texture, 0, &attr);
nuclear@0 201 return attr.load(fname);
nuclear@0 202 }
nuclear@0 203
nuclear@0 204 bool ParticleSystem::save(const char *fname) const
nuclear@0 205 {
nuclear@0 206 return attr.save(fname);
nuclear@0 207 }
nuclear@0 208
nuclear@0 209 void ParticleSystem::update(long tm)
nuclear@0 210 {
nuclear@0 211 if(start_time > LONG_MIN) {
nuclear@0 212 tm -= start_time;
nuclear@0 213 }
nuclear@0 214
nuclear@0 215 Matrix4x4 xform;
nuclear@0 216 get_xform(tm, &xform);
nuclear@0 217
nuclear@0 218 Vector3 pos = Vector3(0, 0, 0).transformed(xform);
nuclear@0 219
nuclear@0 220 psys_set_pos(&psys, v3_cons(pos.x, pos.y, pos.z), 0);
nuclear@0 221 psys_update(&psys, (double)tm / 1000.0);
nuclear@0 222
nuclear@0 223 last_upd_time = tm;
nuclear@0 224 }
nuclear@0 225
nuclear@0 226 void ParticleSystem::draw() const
nuclear@0 227 {
nuclear@0 228 psys_draw(&psys);
nuclear@0 229 }
nuclear@0 230
nuclear@0 231 // ---- particle drawing ----
nuclear@0 232 struct PVertex {
nuclear@0 233 Vector4 color;
nuclear@0 234 Vector3 pos;
nuclear@0 235 Vector2 texcoord;
nuclear@0 236 };
nuclear@0 237
nuclear@0 238
nuclear@0 239 #define USE_VBO
nuclear@0 240 #define USE_IBO
nuclear@0 241
nuclear@0 242
nuclear@0 243 #define MAX_DRAW_PART 256
nuclear@0 244 #define MAX_PVERTS (MAX_DRAW_PART * 4)
nuclear@0 245 static PVertex *pvarr, *pvptr;
nuclear@0 246
nuclear@0 247 // double-buffered vbo set, write on one, while drawing from the other
nuclear@0 248
nuclear@0 249 #ifdef USE_VBO
nuclear@0 250 static unsigned int vbo[2];
nuclear@0 251 static int cur_buf; // current write vbo
nuclear@0 252 #endif
nuclear@0 253 static int num_buffered; // number of particles bufferd, will flush when >= MAX_DRAW_PART
nuclear@0 254
nuclear@0 255 // ok so the index array is constant, regardless of the particle system
nuclear@0 256 // so this is a static index buffer created in init_particle_draw which should
nuclear@0 257 // be called once.
nuclear@0 258 #define MAX_PVIDX (MAX_DRAW_PART * 6)
nuclear@0 259 #ifdef USE_IBO
nuclear@0 260 static unsigned int ibo;
nuclear@0 261 #endif
nuclear@0 262 unsigned int *pvidx;
nuclear@0 263
nuclear@0 264 static ShaderProg *psdr; // particle shader
nuclear@0 265 static Texture2D *blank_tex;
nuclear@0 266
nuclear@0 267 static inline void init_particle_draw()
nuclear@0 268 {
nuclear@0 269 static bool done_init;
nuclear@0 270 if(done_init) {
nuclear@0 271 return; // once
nuclear@0 272 }
nuclear@0 273
nuclear@0 274 pvidx = new unsigned int[MAX_PVIDX];
nuclear@0 275 unsigned int *ptr = pvidx;
nuclear@0 276
nuclear@0 277 static const unsigned int idxoffs[] = { 0, 1, 2, 0, 2, 3 };
nuclear@0 278
nuclear@0 279 for(int i=0; i<MAX_DRAW_PART; i++) {
nuclear@0 280 for(int j=0; j<6; j++) {
nuclear@0 281 *ptr++ = i * 4 + idxoffs[j];
nuclear@0 282 }
nuclear@0 283 }
nuclear@0 284
nuclear@0 285 #ifdef USE_IBO
nuclear@0 286 glGenBuffers(1, &ibo);
nuclear@0 287 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
nuclear@0 288 glBufferData(GL_ELEMENT_ARRAY_BUFFER, MAX_PVIDX * sizeof *pvidx, pvidx, GL_STATIC_DRAW);
nuclear@0 289 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
nuclear@0 290
nuclear@0 291 delete [] pvidx;
nuclear@0 292 #endif
nuclear@0 293
nuclear@0 294 #ifdef USE_VBO
nuclear@0 295 // create the stream vertex buffers (double buffering)
nuclear@0 296 glGenBuffers(2, vbo);
nuclear@0 297 for(int i=0; i<2; i++) {
nuclear@0 298 glBindBuffer(GL_ARRAY_BUFFER, vbo[i]);
nuclear@0 299 glBufferData(GL_ARRAY_BUFFER, MAX_PVERTS * sizeof(PVertex), 0, GL_STREAM_DRAW);
nuclear@0 300 }
nuclear@0 301 glBindBuffer(GL_ARRAY_BUFFER, 0);
nuclear@0 302 #else
nuclear@0 303 pvarr = new PVertex[MAX_PVERTS];
nuclear@0 304 pvptr = pvarr;
nuclear@0 305 #endif
nuclear@0 306
nuclear@0 307 // load shader program
nuclear@0 308 if(!(psdr = get_sdrprog("psdr.v.glsl", "psdr.p.glsl"))) {
nuclear@0 309 error_log("failed to load particle shader!\n");
nuclear@0 310 }
nuclear@0 311
nuclear@0 312 // create empty texture
nuclear@0 313 Image *img = texgen_solid(8, 8, Vector4(1, 1, 1, 1));
nuclear@0 314 blank_tex = new Texture2D;
nuclear@0 315 blank_tex->set_image(*img);
nuclear@0 316 delete img;
nuclear@0 317
nuclear@0 318 done_init = true;
nuclear@0 319 }
nuclear@0 320
nuclear@0 321 static void pdraw_flush()
nuclear@0 322 {
nuclear@0 323 #ifdef USE_VBO
nuclear@0 324 // assuming vbo[cur_buf] is bound
nuclear@0 325 glUnmapBuffer(GL_ARRAY_BUFFER);
nuclear@0 326 #endif
nuclear@0 327
nuclear@0 328 // draw from the bound buffer 6 indices per particle
nuclear@0 329 #ifdef USE_IBO
nuclear@0 330 glDrawElements(GL_TRIANGLES, num_buffered * 6, GL_UNSIGNED_INT, 0);
nuclear@0 331 #else
nuclear@0 332 glDrawElements(GL_TRIANGLES, num_buffered * 6, GL_UNSIGNED_INT, pvidx);
nuclear@0 333 #endif
nuclear@0 334 num_buffered = 0;
nuclear@0 335
nuclear@0 336 #ifdef USE_VBO
nuclear@0 337 // map the next buffer (write buffer) while the previous is drawing
nuclear@0 338 cur_buf = (cur_buf + 1) & 1;
nuclear@0 339 glBindBuffer(GL_ARRAY_BUFFER, vbo[cur_buf]);
nuclear@0 340 pvarr = (PVertex*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
nuclear@0 341 #endif
nuclear@0 342 pvptr = pvarr;
nuclear@0 343 }
nuclear@0 344
nuclear@0 345 static void pdraw_start(const psys_emitter *em, void *cls)
nuclear@0 346 {
nuclear@0 347 ParticleSystem *ps = (ParticleSystem*)cls;
nuclear@0 348
nuclear@0 349 init_particle_draw();
nuclear@0 350
nuclear@0 351 num_buffered = 0;
nuclear@0 352
nuclear@0 353 #ifdef USE_IBO
nuclear@0 354 // bind the particle index buffer which is static
nuclear@0 355 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
nuclear@0 356 #endif
nuclear@0 357
nuclear@0 358 #ifdef USE_VBO
nuclear@0 359 // map the current write buffer
nuclear@0 360 glBindBuffer(GL_ARRAY_BUFFER, vbo[cur_buf]);
nuclear@0 361 pvarr = (PVertex*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
nuclear@0 362 #endif
nuclear@0 363 pvptr = pvarr;
nuclear@0 364
nuclear@0 365 Texture *tex = ps->get_attr()->get_texture();
nuclear@0 366 if(tex) {
nuclear@0 367 tex->bind();
nuclear@0 368 } else {
nuclear@0 369 blank_tex->bind();
nuclear@0 370 }
nuclear@0 371 psdr->bind();
nuclear@0 372
nuclear@0 373 glDisable(GL_DEPTH_TEST);
nuclear@0 374 glDisable(GL_CULL_FACE);
nuclear@0 375 glEnable(GL_BLEND);
nuclear@0 376 glBlendFunc(GL_SRC_ALPHA, GL_ONE);
nuclear@0 377 glDepthMask(0);
nuclear@0 378
nuclear@0 379 glEnableVertexAttribArray(MESH_ATTR_VERTEX);
nuclear@0 380 glEnableVertexAttribArray(MESH_ATTR_COLOR);
nuclear@0 381 glEnableVertexAttribArray(MESH_ATTR_TEXCOORD);
nuclear@0 382
nuclear@0 383 #ifdef USE_VBO
nuclear@0 384 glVertexAttribPointer(MESH_ATTR_VERTEX, 3, GL_FLOAT, GL_FALSE, sizeof *pvarr, (void*)((char*)&pvarr->pos - (char*)pvarr));
nuclear@0 385 glVertexAttribPointer(MESH_ATTR_COLOR, 4, GL_FLOAT, GL_TRUE, sizeof *pvarr, (void*)((char*)&pvarr->color - (char*)pvarr));
nuclear@0 386 glVertexAttribPointer(MESH_ATTR_TEXCOORD, 2, GL_FLOAT, GL_FALSE, sizeof *pvarr, (void*)((char*)&pvarr->texcoord - (char*)pvarr));
nuclear@0 387 #else
nuclear@0 388 glVertexAttribPointer(MESH_ATTR_VERTEX, 3, GL_FLOAT, GL_FALSE, sizeof *pvarr, (void*)&pvarr->pos);
nuclear@0 389 glVertexAttribPointer(MESH_ATTR_COLOR, 4, GL_FLOAT, GL_TRUE, sizeof *pvarr, (void*)&pvarr->color);
nuclear@0 390 glVertexAttribPointer(MESH_ATTR_TEXCOORD, 2, GL_FLOAT, GL_FALSE, sizeof *pvarr, (void*)&pvarr->texcoord);
nuclear@0 391 #endif
nuclear@0 392 }
nuclear@0 393
nuclear@0 394 static void pdraw(const psys_emitter *em, const psys_particle *part, void *cls)
nuclear@0 395 {
nuclear@0 396 ParticleSystem *ps = (ParticleSystem*)cls;
nuclear@0 397
nuclear@0 398 static const Vector3 pv[] = {
nuclear@0 399 Vector3(-0.5, -0.5, 0),
nuclear@0 400 Vector3(0.5, -0.5, 0),
nuclear@0 401 Vector3(0.5, 0.5, 0),
nuclear@0 402 Vector3(-0.5, 0.5, 0)
nuclear@0 403 };
nuclear@0 404 static const Vector2 tex[] = {
nuclear@0 405 Vector2(0, 0), Vector2(0, 1), Vector2(1, 1), Vector2(1, 0)
nuclear@0 406 };
nuclear@0 407 Vector4 color = Vector4(part->color.x, part->color.y, part->color.z, part->alpha);
nuclear@0 408
nuclear@0 409 for(int i=0; i<4; i++) {
nuclear@0 410 pvptr->color = color;
nuclear@0 411 pvptr->pos = pv[i] * part->size + part->pos;
nuclear@0 412 pvptr->texcoord = tex[i];
nuclear@0 413 pvptr++;
nuclear@0 414 }
nuclear@0 415 // XXX we don't need billboarding for this game, so don't bother
nuclear@0 416
nuclear@0 417 // if we reached the maximum number of buffered particles, draw them
nuclear@0 418 if(++num_buffered >= MAX_DRAW_PART) {
nuclear@0 419 pdraw_flush(); // this will reset the counter
nuclear@0 420 }
nuclear@0 421 }
nuclear@0 422
nuclear@0 423 static void pdraw_end(const psys_emitter *em, void *cls)
nuclear@0 424 {
nuclear@0 425 // if we have leftover particles buffered, draw them before returning
nuclear@0 426 if(num_buffered) {
nuclear@0 427 pdraw_flush();
nuclear@0 428 }
nuclear@0 429
nuclear@0 430 // cleanup
nuclear@0 431 glDisableVertexAttribArray(MESH_ATTR_VERTEX);
nuclear@0 432 glDisableVertexAttribArray(MESH_ATTR_COLOR);
nuclear@0 433 glDisableVertexAttribArray(MESH_ATTR_TEXCOORD);
nuclear@0 434
nuclear@0 435 #ifdef USE_VBO
nuclear@0 436 glUnmapBuffer(GL_ARRAY_BUFFER);
nuclear@0 437 glBindBuffer(GL_ARRAY_BUFFER, 0);
nuclear@0 438 #endif
nuclear@0 439 #ifdef USE_IBO
nuclear@0 440 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
nuclear@0 441 #endif
nuclear@0 442
nuclear@0 443 glDepthMask(1);
nuclear@0 444 glDisable(GL_BLEND);
nuclear@0 445
nuclear@0 446 glEnable(GL_DEPTH_TEST);
nuclear@0 447 glEnable(GL_CULL_FACE);
nuclear@0 448 }
nuclear@0 449
nuclear@0 450 static unsigned int psys_load_texture(const char *fname, void *cls)
nuclear@0 451 {
nuclear@0 452 ParticleSystemAttributes *attr = (ParticleSystemAttributes*)cls;
nuclear@0 453
nuclear@0 454 Texture *tex = texset.get(fname);
nuclear@0 455 if(tex) {
nuclear@0 456 attr->set_texture(tex);
nuclear@0 457 return tex->get_id();
nuclear@0 458 }
nuclear@0 459 return 0;
nuclear@0 460 }