qf/quakeforge
0
0
Fork 0
mirror of https://git.code.sf.net/p/quake/quakeforge synced 2024-11-10 15:22:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

Commit experimental particle optimization. Reduces random particles from using

Browse source 
6 15 bit rand() to 2 calls, with 5 bits for each of the 6.
This is up to a 1% speedup for qf particles, and up to 2.1% for id.

It may particularly affect explosions with r_particles_style 0.
Please report any anomolies in any particle effects.
This commit is contained in:
Ragnvald Maartmann-Moe IV 2003-08-15 20:26:09 +00:00
parent 323a6182fd
commit d8068de4fa
1 changed files with 30 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

35
libs/video/renderer/gl/gl_dyn_part.c
View file

@ -102,6 +102,7 @@ particle_new (ptype_t type, int texnum, const vec3_t org, float scale,
/*
particle_new_random
note that org_fuzz & vel_fuzz should be ints greater than 0 if you are
going to bother using this function.
*/
@ -110,16 +111,40 @@ particle_new_random (ptype_t type, int texnum, const vec3_t org, int org_fuzz,
float scale, int vel_fuzz, float die, int color,
float alpha, float ramp)
{
int j;
float o_fuzz = org_fuzz, v_fuzz = vel_fuzz;
int rnd;
vec3_t porg, pvel;
for (j = 0; j < 3; j++) {
porg[j] = qfrandom (org_fuzz * 2) - org_fuzz + org[j];
pvel[j] = qfrandom (vel_fuzz * 2) - vel_fuzz;
}
rnd = rand ();
porg[0] = o_fuzz * ((rnd & 63) - 31.5) / 63.0 + org[0];
porg[1] = o_fuzz * (((rnd >> 5) & 63) - 31.5) / 63.0 + org[1];
porg[2] = o_fuzz * (((rnd >> 10) & 63) - 31.5) / 63.0 + org[2];
rnd = rand ();
pvel[0] = v_fuzz * ((rnd & 63) - 31.5) / 63.0;
pvel[1] = v_fuzz * (((rnd >> 5) & 63) - 31.5) / 63.0;
pvel[2] = v_fuzz * (((rnd >> 10) & 63) - 31.5) / 63.0;
particle_new (type, texnum, porg, scale, pvel, die, color, alpha, ramp);
}
/*
inline static void
particle_new_veryrandom (ptype_t type, int texnum, const vec3_t org,
int org_fuzz, float scale, int vel_fuzz, float die,
int color, float alpha, float ramp)
{
vec3_t porg, pvel;
porg[0] = qfrandom (org_fuzz * 2) - org_fuzz + org[0];
porg[1] = qfrandom (org_fuzz * 2) - org_fuzz + org[1];
porg[2] = qfrandom (org_fuzz * 2) - org_fuzz + org[2];
pvel[0] = qfrandom (vel_fuzz * 2) - vel_fuzz;
pvel[1] = qfrandom (vel_fuzz * 2) - vel_fuzz;
pvel[2] = qfrandom (vel_fuzz * 2) - vel_fuzz;
particle_new (type, texnum, porg, scale, pvel, die, color, alpha, ramp);
}
*/
inline void
R_ClearParticles (void)
{