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Eevee: Volumetrics: Update/fix the lamp power convertion.

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Include a better fit for area lights.
This commit is contained in:
Clément Foucault
2018-01-18 21:52:16 +01:00
parent 03e432bcdb
commit 59989fd4e0
1 changed files with 6 additions and 3 deletions
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9
source/blender/draw/engines/eevee/shaders/volumetric_lib.glsl
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@@ -71,14 +71,17 @@ vec3 light_volume(LightData ld, vec4 l_vector)
/* TODO : Area lighting ? */
/* XXX : Removing Area Power. */
/* TODO : put this out of the shader. */
/* See eevee_light_setup(). */
if (ld.l_type == AREA) {
power = 0.0962 * (ld.l_sizex * ld.l_sizey * 4.0 * M_PI);
power = (ld.l_sizex * ld.l_sizey * 4.0 * M_PI) * (1.0 / 80.0);
power *= 20.0 * max(0.0, dot(-ld.l_forward, l_vector.xyz / l_vector.w)); /* XXX ad hoc, empirical */
}
else if (ld.l_type == SUN) {
power = 1.0;
power = (4.0f * ld.l_radius * ld.l_radius * M_2PI) * (1.0 / 12.5); /* Removing area light power*/
power *= M_2PI * 0.78; /* Matching cycles with point light. */
}
else {
power = 0.0248 * (4.0 * ld.l_radius * ld.l_radius * M_PI * M_PI);
power = (4.0 * ld.l_radius * ld.l_radius) * (1.0 /10.0);
}
/* OPTI: find a better way than calculating this on the fly */