screen_savers/flurry/Smoke.cpp

85 UpdateSmoke_ScalarBase(flurry_info_t* info, SmokeV* s)
87 	float sx = info->star->position[0];
88 	float sy = info->star->position[1];
89 	float sz = info->star->position[2];
97 		if (info->fTime - s->lastParticleTime >= 1.0f / 121.0f) {
115 			for(int i=0; i < info->numStreams; i++) {
130 					- info->spark[i]->position[0];
132 					- info->spark[i]->position[1];
134 					- info->spark[i]->position[2];
147 					= info->spark[i]->color[0] * (1.0f
150 					= info->spark[i]->color[1] * (1.0f
153 					= info->spark[i]->color[2] * (1.0f
157 				s->p[s->nextParticle].time.f[s->nextSubParticle] = info->fTime;
172 			s->lastParticleTime = info->fTime;
175 		s->lastParticleTime = info->fTime;
180 		s->old[i] = info->star->position[i];
182 	frameRate = ((double) info->dframe) / (info->fTime);
204 			for(int j = 0; j < info->numStreams; j++) {
205 				dx = s->p[i].position[0].f[k] - info->spark[j]->position[0];
206 				dy = s->p[i].position[1].f[k] - info->spark[j]->position[1];
207 				dz = s->p[i].position[2].f[k] - info->spark[j]->position[2];
212 				if ((((i * 4) + k) % info->numStreams) == j)
222 			// slow this particle down by info->drag
223 			deltax *= info->drag;
224 			deltay *= info->drag;
225 			deltaz *= info->drag;
240 					+= (s->p[i].delta[j].f[k]) * info->fDeltaTime;
248 DrawSmoke_Scalar(flurry_info_t* info, SmokeV* s, float brightness)
263 	float screenRatio = info->sys_glWidth / 1024.0f;
264 	float hslash2 = info->sys_glHeight * 0.5f;
265 	float wslash2 = info->sys_glWidth * 0.5f;
267 	width = (streamSize + 2.5f * info->streamExpansion) * screenRatio;
277 			thisWidth = (streamSize + (info->fTime - s->p[i].time.f[k])
278 				* info->streamExpansion) * screenRatio;
284 			sx = s->p[i].position[0].f[k] * info->sys_glWidth / z + wslash2;
285 			sy = s->p[i].position[1].f[k] * info->sys_glWidth / z + hslash2;
287 			if (sx > info->sys_glWidth + 50.0f || sx < -50.0f
288 				|| sy > info->sys_glHeight + 50.0f || sy < -50.0f || z < 25.0f
297 				float oldscreenx = (oldx * info->sys_glWidth / oldz) + wslash2;
298 				float oldscreeny = (oldy * info->sys_glWidth / oldz) + hslash2;