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[vulkan] Implement linear falloff

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It's possibly too bright, but it might be the lights themselves. Still,
it looks better than the no-falloff implementation.
This commit is contained in:
Bill Currie 2021-02-25 16:11:47 +09:00
parent 33575f93d5
commit fd97bb1456
1 changed files with 3 additions and 3 deletions
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6
libs/video/renderer/vulkan/shader/lighting.frag
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@ -29,12 +29,12 @@ calc_light (LightData light, vec3 position, vec3 normal)
vec3 incoming = normalize (dist); vec3 incoming = normalize (dist);
float spotdot = -dot (incoming, light.direction); float spotdot = -dot (incoming, light.direction);
float lightdot = dot (incoming, normal); float lightdot = dot (incoming, normal);
float d = dot (dist, dist); float d = sqrt (dot (dist, dist));
float r = light.radius; float r = light.radius;
float intensity = light.intensity * step (d, r * r); float intensity = light.intensity * step (d, r);
intensity *= step (spotdot, light.cone) * clamp (lightdot, 0, 1); intensity *= step (spotdot, light.cone) * clamp (lightdot, 0, 1);
return light.color * intensity; return light.color * intensity * (r - d);
} }
void void