mirror of
https://github.com/tanema/light_world.lua.git
synced 2024-12-24 20:24:19 +00:00
20 lines
574 B
GLSL
20 lines
574 B
GLSL
extern Image glowImage;
|
|
|
|
extern float glowTime;
|
|
|
|
vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords) {
|
|
vec3 glowInfo = Texel(glowImage, texture_coords).rgb;
|
|
|
|
if(glowInfo.r != glowInfo.g) {
|
|
float glowStrength = glowTime + glowInfo.b;
|
|
if(mod(glowStrength, 2.0) < 1.0) {
|
|
glowInfo.b = mod(glowStrength, 1.0);
|
|
} else {
|
|
glowInfo.b = 1.0 - mod(glowStrength, 1.0);
|
|
}
|
|
|
|
return Texel(texture, texture_coords) * (glowInfo.g + glowInfo.b * (glowInfo.r - glowInfo.g));
|
|
}
|
|
|
|
return vec4(Texel(texture, texture_coords).rgb * glowInfo.r, 1.0);
|
|
} |