diff options
Diffstat (limited to 'modules/lightmapper_rd/lm_compute.glsl')
| -rw-r--r-- | modules/lightmapper_rd/lm_compute.glsl | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/modules/lightmapper_rd/lm_compute.glsl b/modules/lightmapper_rd/lm_compute.glsl index 56976bd623..eb9d817f99 100644 --- a/modules/lightmapper_rd/lm_compute.glsl +++ b/modules/lightmapper_rd/lm_compute.glsl @@ -249,6 +249,15 @@ float quick_hash(vec2 pos) { return fract(sin(dot(pos * 19.19, vec2(49.5791, 97.413))) * 49831.189237); } +float get_omni_attenuation(float distance, float inv_range, float decay) { + float nd = distance * inv_range; + nd *= nd; + nd *= nd; // nd^4 + nd = max(1.0 - nd, 0.0); + nd *= nd; // nd^2 + return nd * pow(max(distance, 0.0001), -decay); +} + void main() { #ifdef MODE_LIGHT_PROBES int probe_index = int(gl_GlobalInvocationID.x); @@ -300,17 +309,20 @@ void main() { d /= lights.data[i].range; - attenuation = pow(max(1.0 - d, 0.0), lights.data[i].attenuation); + attenuation = get_omni_attenuation(d, 1.0 / lights.data[i].range, lights.data[i].attenuation); if (lights.data[i].type == LIGHT_TYPE_SPOT) { vec3 rel = normalize(position - light_pos); - float angle = acos(dot(rel, lights.data[i].direction)); - if (angle > lights.data[i].spot_angle) { + float cos_spot_angle = lights.data[i].cos_spot_angle; + float cos_angle = dot(rel, lights.data[i].direction); + + if (cos_angle < cos_spot_angle) { continue; //invisible, dont try } - float d = clamp(angle / lights.data[i].spot_angle, 0, 1); - attenuation *= pow(1.0 - d, lights.data[i].spot_attenuation); + float scos = max(cos_angle, cos_spot_angle); + float spot_rim = max(0.0001, (1.0 - scos) / (1.0 - cos_spot_angle)); + attenuation *= 1.0 - pow(spot_rim, lights.data[i].inv_spot_attenuation); } } |