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Colour Temperature Shader

This commit is contained in:
LoafyLemon 2022-09-15 22:35:43 +01:00
parent 82c54c0b57
commit 76048a5278
1 changed files with 27 additions and 0 deletions
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27
game/scripts/shaders.rpy
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@ -15,3 +15,30 @@ init python:
gl_FragColor = col;
}
""")
renpy.register_shader("color_temperature_shader", variables="""
uniform float u_factor;
uniform float u_strength;
""", fragment_functions="""
vec3 CBT(float ctemp) {
mat3 m = (ctemp <= 6500.0) ? mat3(vec3(0.0, -2902.1955373783176, -8257.7997278925690),
vec3(0.0, 1669.5803561666639, 2575.2827530017594),
vec3(1.0, 1.3302673723350029, 1.8993753891711275)) :
mat3(vec3(1745.0425298314172, 1216.6168361476490, -8257.7997278925690),
vec3(-2666.3474220535695, -2173.1012343082230, 2575.2827530017594),
vec3(0.55995389139931482, 0.70381203140554553, 1.8993753891711275));
return mix(clamp(vec3(m[0] / (vec3(clamp(ctemp, 1000.0, 40000.0)) + m[1]) + m[2]), vec3(0.0), vec3(1.0)), vec3(1.0), smoothstep(1000.0, 0.0, ctemp));
}
""", fragment_300="""
const float PI2 = 6.2831853071;
float ctemp = mix(1000.0, 40000.0, u_factor);
gl_FragColor = vec4(mix(gl_FragColor.xyz, gl_FragColor.xyz * CBT(ctemp), u_strength), 1.0);
""")
transform color_temperature(factor=1.0, strength=1.0):
mesh True
shader "color_temperature_shader"
u_factor factor
u_strength strength