diff options
Diffstat (limited to 'source/blender/draw/engines/eevee/eevee_lights.c')
| -rw-r--r-- | source/blender/draw/engines/eevee/eevee_lights.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/source/blender/draw/engines/eevee/eevee_lights.c b/source/blender/draw/engines/eevee/eevee_lights.c index dff69bcdd52..cba86d058ea 100644 --- a/source/blender/draw/engines/eevee/eevee_lights.c +++ b/source/blender/draw/engines/eevee/eevee_lights.c @@ -243,11 +243,27 @@ void EEVEE_lights_cache_add(EEVEE_ViewLayerData *sldata, Object *ob) linfo->num_light++; } -void EEVEE_lights_cache_finish(EEVEE_ViewLayerData *sldata, EEVEE_Data *UNUSED(vedata)) +void EEVEE_lights_cache_finish(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata) { EEVEE_LightsInfo *linfo = sldata->lights; sldata->common_data.la_num_light = linfo->num_light; + /* Clamp volume lights power. */ + float upper_bound = vedata->stl->effects->volume_light_clamp; + for (int i = 0; i < linfo->num_light; i++) { + EEVEE_Light *evli = linfo->light_data + i; + + float power = max_fff(UNPACK3(evli->color)) * evli->volume; + if (power > 0.0f && evli->light_type != LA_SUN) { + /* The limit of the power attenuation function when the distance to the light goes to 0 is + * 2 / r² where r is the light radius. We need to find the right radius that emits at most + * the volume light upper bound. Inverting the function we get: */ + float min_radius = 1.0f / sqrtf(0.5f * upper_bound / power); + /* Square it here to avoid a multiplication inside the shader. */ + evli->volume_radius = square_f(max_ff(min_radius, evli->radius)); + } + } + GPU_uniformbuf_update(sldata->light_ubo, &linfo->light_data); } |