16 lines
583 B
GLSL
16 lines
583 B
GLSL
|
void node_wavelength(float wavelength,
|
||
|
|
sampler1DArray spectrummap,
|
||
|
|
float layer,
|
||
|
|
vec3 xyz_to_r,
|
||
|
|
vec3 xyz_to_g,
|
||
|
|
vec3 xyz_to_b,
|
||
|
|
out vec4 color)
|
||
|
|
{
|
||
|
|
mat3 xyz_to_rgb = mat3(xyz_to_r, xyz_to_g, xyz_to_b);
|
||
|
|
float t = (wavelength - 380.0) / (780.0 - 380.0);
|
||
|
|
vec3 xyz = texture(spectrummap, vec2(t, layer)).rgb;
|
||
|
|
vec3 rgb = xyz * xyz_to_rgb;
|
||
|
|
rgb *= 1.0 / 2.52; /* Empirical scale from lg to make all comps <= 1. */
|
||
|
|
color = vec4(clamp(rgb, 0.0, 1.0), 1.0);
|
||
|
|
}
|