diff options
Diffstat (limited to 'servers/rendering/renderer_rd/shaders/giprobe.glsl')
| -rw-r--r-- | servers/rendering/renderer_rd/shaders/giprobe.glsl | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/servers/rendering/renderer_rd/shaders/giprobe.glsl b/servers/rendering/renderer_rd/shaders/giprobe.glsl index 4f4753d147..b931461b31 100644 --- a/servers/rendering/renderer_rd/shaders/giprobe.glsl +++ b/servers/rendering/renderer_rd/shaders/giprobe.glsl @@ -51,10 +51,10 @@ struct Light { float attenuation; vec3 color; - float spot_angle_radians; + float cos_spot_angle; vec3 position; - float spot_attenuation; + float inv_spot_attenuation; vec3 direction; bool has_shadow; @@ -233,13 +233,15 @@ bool compute_light_vector(uint light, vec3 pos, out float attenuation, out vec3 if (lights.data[light].type == LIGHT_TYPE_SPOT) { vec3 rel = normalize(pos - light_pos); - float angle = acos(dot(rel, lights.data[light].direction)); - if (angle > lights.data[light].spot_angle_radians) { + float cos_spot_angle = lights.data[light].cos_spot_angle; + float cos_angle = dot(rel, lights.data[light].direction); + if (cos_angle < cos_spot_angle) { return false; } - float d = clamp(angle / lights.data[light].spot_angle_radians, 0, 1); - attenuation *= pow(1.0 - d, lights.data[light].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[light].inv_spot_attenuation); } } |