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Make particle texture slightly higher quality

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This commit is contained in:
Magnus Norddahl 2017-01-13 16:12:43 +01:00
commit ca046d26c5
5 changed files with 18 additions and 16 deletions
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17
src/swrenderer/drawers/r_draw.cpp
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@ -65,7 +65,7 @@ namespace swrenderer
int fuzzpos;
int fuzzviewheight;
uint32_t particle_texture[16 * 16];
uint32_t particle_texture[PARTICLE_TEXTURE_SIZE * PARTICLE_TEXTURE_SIZE];
short zeroarray[MAXWIDTH];
short screenheightarray[MAXWIDTH];
@ -237,16 +237,17 @@ namespace swrenderer
void R_InitParticleTexture()
{
for (int y = 0; y < 16; y++)
float center = PARTICLE_TEXTURE_SIZE * 0.5f;
for (int y = 0; y < PARTICLE_TEXTURE_SIZE; y++)
{
for (int x = 0; x < 16; x++)
for (int x = 0; x < PARTICLE_TEXTURE_SIZE; x++)
{
float dx = (8 - x) / 8.0f;
float dy = (8 - y) / 8.0f;
float dist = sqrt(dx * dx + dy * dy);
float alpha = clamp(3.0f - dist * 3.0f, 0.0f, 1.0f);
float dx = (center - x - 0.5f) / center;
float dy = (center - y - 0.5f) / center;
float dist2 = dx * dx + dy * dy;
float alpha = clamp(1.1f - dist2 * 1.1f, 0.0f, 1.0f);
particle_texture[x + y * 16] = (int)(alpha * 64.0f + 0.5f);
particle_texture[x + y * PARTICLE_TEXTURE_SIZE] = (int)(alpha * 128.0f + 0.5f);
}
}
}