godotengine/godot
1
0
Fork 0
mirror of https://github.com/godotengine/godot.git synced 2025-11-06 12:20:30 +00:00
Code Releases Wiki Activity

Evaluate specular reflections using specular dominant direction instead of assuming mirror reflections

Browse Source
This commit is contained in:
clayjohn
2022-06-29 23:36:18 -07:00
parent ce6c4ab86a
commit 93c82ab4b9
4 changed files with 38 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl
View File

@@ -988,8 +988,10 @@ void fragment_shader(in SceneData scene_data) {
vec3 anisotropic_normal = cross(anisotropic_tangent, anisotropic_direction);
vec3 bent_normal = normalize(mix(normal, anisotropic_normal, abs(anisotropy) * clamp(5.0 * roughness, 0.0, 1.0)));
vec3 ref_vec = reflect(-view, bent_normal);
ref_vec = mix(ref_vec, bent_normal, roughness * roughness);
#else
vec3 ref_vec = reflect(-view, normal);
ref_vec = mix(ref_vec, normal, roughness * roughness);
#endif
float horizon = min(1.0 + dot(ref_vec, normal), 1.0);
@@ -1046,6 +1048,7 @@ void fragment_shader(in SceneData scene_data) {
ambient_light *= attenuation;
specular_light *= attenuation;
ref_vec = mix(ref_vec, n, clearcoat_roughness * clearcoat_roughness);
float horizon = min(1.0 + dot(ref_vec, normal), 1.0);
ref_vec = scene_data.radiance_inverse_xform * ref_vec;
float roughness_lod = mix(0.001, 0.1, clearcoat_roughness) * MAX_ROUGHNESS_LOD;
@@ -1203,6 +1206,7 @@ void fragment_shader(in SceneData scene_data) {
uint index1 = instances.data[instance_index].gi_offset & 0xFFFF;
vec3 ref_vec = normalize(reflect(-view, normal));
ref_vec = mix(ref_vec, normal, roughness * roughness);
//find arbitrary tangent and bitangent, then build a matrix
vec3 v0 = abs(normal.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(0.0, 1.0, 0.0);
vec3 tangent = normalize(cross(v0, normal));
@@ -1302,6 +1306,18 @@ void fragment_shader(in SceneData scene_data) {
item_to = subgroupBroadcastFirst(subgroupMax(item_to));
#endif
#ifdef LIGHT_ANISOTROPY_USED
// https://google.github.io/filament/Filament.html#lighting/imagebasedlights/anisotropy
vec3 anisotropic_direction = anisotropy >= 0.0 ? binormal : tangent;
vec3 anisotropic_tangent = cross(anisotropic_direction, view);
vec3 anisotropic_normal = cross(anisotropic_tangent, anisotropic_direction);
vec3 bent_normal = normalize(mix(normal, anisotropic_normal, abs(anisotropy) * clamp(5.0 * roughness, 0.0, 1.0)));
#else
vec3 bent_normal = normal;
#endif
vec3 ref_vec = normalize(reflect(-view, bent_normal));
ref_vec = mix(ref_vec, bent_normal, roughness * roughness);
for (uint i = item_from; i < item_to; i++) {
uint mask = cluster_buffer.data[cluster_reflection_offset + i];
mask &= cluster_get_range_clip_mask(i, item_min, item_max);
@@ -1324,16 +1340,8 @@ void fragment_shader(in SceneData scene_data) {
if (!bool(reflections.data[reflection_index].mask & instances.data[instance_index].layer_mask)) {
continue; //not masked
}
#ifdef LIGHT_ANISOTROPY_USED
// https://google.github.io/filament/Filament.html#lighting/imagebasedlights/anisotropy
vec3 anisotropic_direction = anisotropy >= 0.0 ? binormal : tangent;
vec3 anisotropic_tangent = cross(anisotropic_direction, view);
vec3 anisotropic_normal = cross(anisotropic_tangent, anisotropic_direction);
vec3 bent_normal = normalize(mix(normal, anisotropic_normal, abs(anisotropy) * clamp(5.0 * roughness, 0.0, 1.0)));
#else
vec3 bent_normal = normal;
#endif
reflection_process(reflection_index, view, vertex, bent_normal, roughness, ambient_light, specular_light, ambient_accum, reflection_accum);
reflection_process(reflection_index, vertex, ref_vec, normal, roughness, ambient_light, specular_light, ambient_accum, reflection_accum);
}
}