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Code Issues 157 Wiki Activity

Add the optional Radius, ShadeSelf, CastShadows and SoftFalloff of FreeSpotLight and make FalloffAngle 360 a point light

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Hirek
2026-10-28 16:18:03 +01:00
parent 413cebed9c
commit c4e23932bf
25 changed files with 327 additions and 72 deletions
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7
shaders/ogl46/fog_inject.comp
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@@ -147,7 +147,7 @@ vec3 lamp_light(light_s light, vec3 position)
vec3 tolight = light.pos - position;
float distance2 = dot(tolight, tolight);
float edge = clamp(1.0 - distance2 * distance2 * (light.quadratic * light.quadratic), 0.0, 1.0);
float atten = edge * edge / max(distance2, 0.01);
float atten = edge * edge * lamp_falloff(light, distance2);
if (light.type == LIGHT_SPOT)
atten *= smoothstep(light.out_cutoff, light.in_cutoff, dot(-tolight * inversesqrt(max(distance2, 1e-8)), normalize(light.dir)));
return light.color * (atten * light.intensity);
@@ -205,7 +205,8 @@ vec3 lamp_segment(light_s lamp, light_s cone, vec3 start, vec3 direction, float
vec3 sum = vec3(0.0);
float closest = dot(lamp.pos - start, direction);
vec3 nearest = start + direction * closest;
float reach = sqrt(dot(lamp.pos - nearest, lamp.pos - nearest) + width * width);
// the sphere of a lamp with a radius spreads its light as the width of the cell does
float reach = sqrt(dot(lamp.pos - nearest, lamp.pos - nearest) + width * width + lamp.ambient * lamp.ambient);
float first = atan(-closest, reach);
float last = atan(span - closest, reach);
for (int i = 0; i < 2; i++)
@@ -214,7 +215,7 @@ vec3 lamp_segment(light_s lamp, light_s cone, vec3 start, vec3 direction, float
vec3 tolight = cone.pos - position;
// the light without its falloff, which the integral holds
vec3 fromlamp = position - lamp.pos;
sum += lamp_light(cone, position) * max(dot(tolight, tolight), 0.01) * henyey_greenstein(dot(fromlamp, -direction) * inversesqrt(max(dot(fromlamp, fromlamp), 1e-8)), 0.4);
sum += lamp_light(cone, position) / lamp_falloff(cone, dot(tolight, tolight)) * henyey_greenstein(dot(fromlamp, -direction) * inversesqrt(max(dot(fromlamp, fromlamp), 1e-8)), 0.4);
}
return sum * (0.5 * (last - first) / (reach * max(span, 1e-4)));
}