diff options
Diffstat (limited to 'drivers/gles3/shaders/scene.glsl')
| -rw-r--r-- | drivers/gles3/shaders/scene.glsl | 65 |
1 files changed, 40 insertions, 25 deletions
diff --git a/drivers/gles3/shaders/scene.glsl b/drivers/gles3/shaders/scene.glsl index 7750fd6293..4fc33acf7c 100644 --- a/drivers/gles3/shaders/scene.glsl +++ b/drivers/gles3/shaders/scene.glsl @@ -596,7 +596,6 @@ float contact_shadow_compute(vec3 pos, vec3 dir, float max_distance) { return 1.0; } - // GGX Specular // Source: http://www.filmicworlds.com/images/ggx-opt/optimized-ggx.hlsl float G1V(float dotNV, float k) @@ -622,7 +621,7 @@ float GTR1(float NdotH, float a) -void light_compute(vec3 N, vec3 L,vec3 V,vec3 B, vec3 T,vec3 light_color,vec3 diffuse_color, vec3 specular_color, float specular_blob_intensity, float roughness, float rim,float rim_tint, float clearcoat, float clearcoat_gloss,float anisotropy,inout vec3 diffuse, inout vec3 specular) { +void light_compute(vec3 N, vec3 L,vec3 V,vec3 B, vec3 T,vec3 light_color,vec3 diffuse_color, float specular_blob_intensity, float roughness, float rim,float rim_tint, float clearcoat, float clearcoat_gloss,float anisotropy,inout vec3 diffuse, inout vec3 specular) { float dotNL = max(dot(N,L), 0.0 ); float dotNV = max(dot(N,V), 0.0 ); @@ -674,7 +673,7 @@ void light_compute(vec3 N, vec3 L,vec3 V,vec3 B, vec3 T,vec3 light_color,vec3 di float speci = dotNL * D * F * vis; - specular += speci * light_color /* specular_color*/ * specular_blob_intensity; + specular += speci * light_color * specular_blob_intensity; #if defined(LIGHT_USE_CLEARCOAT) float Dr = GTR1(dotNH, mix(.1,.001,clearcoat_gloss)); @@ -733,6 +732,8 @@ in highp float dp_clip; #endif + + #if 0 //need to save texture depth for this @@ -762,7 +763,7 @@ vec3 light_transmittance(float translucency,vec3 light_vec, vec3 normal, vec3 po } #endif -void light_process_omni(int idx, vec3 vertex, vec3 eye_vec,vec3 normal,vec3 binormal, vec3 tangent, vec3 albedo, vec3 specular, float roughness, float rim, float rim_tint, float clearcoat, float clearcoat_gloss,float anisotropy,inout vec3 diffuse_light, inout vec3 specular_light) { +void light_process_omni(int idx, vec3 vertex, vec3 eye_vec,vec3 normal,vec3 binormal, vec3 tangent, vec3 albedo, float roughness, float rim, float rim_tint, float clearcoat, float clearcoat_gloss,float anisotropy,inout vec3 diffuse_light, inout vec3 specular_light) { vec3 light_rel_vec = omni_lights[idx].light_pos_inv_radius.xyz-vertex; float light_length = length( light_rel_vec ); @@ -813,11 +814,11 @@ void light_process_omni(int idx, vec3 vertex, vec3 eye_vec,vec3 normal,vec3 bino light_attenuation*=mix(omni_lights[idx].shadow_color_contact.rgb,vec3(1.0),shadow); } - light_compute(normal,normalize(light_rel_vec),eye_vec,binormal,tangent,omni_lights[idx].light_color_energy.rgb*light_attenuation,albedo,specular,omni_lights[idx].light_params.z,roughness,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); + light_compute(normal,normalize(light_rel_vec),eye_vec,binormal,tangent,omni_lights[idx].light_color_energy.rgb*light_attenuation,albedo,omni_lights[idx].light_params.z,roughness,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); } -void light_process_spot(int idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 binormal, vec3 tangent,vec3 albedo, vec3 specular, float roughness, float rim,float rim_tint, float clearcoat, float clearcoat_gloss,float anisotropy, inout vec3 diffuse_light, inout vec3 specular_light) { +void light_process_spot(int idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 binormal, vec3 tangent,vec3 albedo, float roughness, float rim,float rim_tint, float clearcoat, float clearcoat_gloss,float anisotropy, inout vec3 diffuse_light, inout vec3 specular_light) { vec3 light_rel_vec = spot_lights[idx].light_pos_inv_radius.xyz-vertex; float light_length = length( light_rel_vec ); @@ -846,11 +847,11 @@ void light_process_spot(int idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 bi light_attenuation*=mix(spot_lights[idx].shadow_color_contact.rgb,vec3(1.0),shadow); } - light_compute(normal,normalize(light_rel_vec),eye_vec,binormal,tangent,spot_lights[idx].light_color_energy.rgb*light_attenuation,albedo,specular,spot_lights[idx].light_params.z,roughness,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); + light_compute(normal,normalize(light_rel_vec),eye_vec,binormal,tangent,spot_lights[idx].light_color_energy.rgb*light_attenuation,albedo,spot_lights[idx].light_params.z,roughness,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); } -void reflection_process(int idx, vec3 vertex, vec3 normal,vec3 binormal, vec3 tangent,float roughness,float anisotropy,vec3 ambient,vec3 skybox,vec2 brdf, inout highp vec4 reflection_accum,inout highp vec4 ambient_accum) { +void reflection_process(int idx, vec3 vertex, vec3 normal,vec3 binormal, vec3 tangent,float roughness,float anisotropy,vec3 ambient,vec3 skybox, inout highp vec4 reflection_accum,inout highp vec4 ambient_accum) { vec3 ref_vec = normalize(reflect(vertex,normal)); vec3 local_pos = (reflections[idx].local_matrix * vec4(vertex,1.0)).xyz; @@ -906,7 +907,7 @@ void reflection_process(int idx, vec3 vertex, vec3 normal,vec3 binormal, vec3 ta splane.xy = clamp(splane.xy,clamp_rect.xy,clamp_rect.xy+clamp_rect.zw); highp vec4 reflection; - reflection.rgb = textureLod(reflection_atlas,splane.xy,roughness*5.0).rgb * brdf.x + brdf.y; + reflection.rgb = textureLod(reflection_atlas,splane.xy,roughness*5.0).rgb; if (reflections[idx].params.z < 0.5) { reflection.rgb = mix(skybox,reflection.rgb,blend); @@ -1160,7 +1161,8 @@ void main() { //lay out everything, whathever is unused is optimized away anyway highp vec3 vertex = vertex_interp; vec3 albedo = vec3(0.8,0.8,0.8); - vec3 specular = vec3(0.2,0.2,0.2); + float metallic = 0.0; + float specular = 0.5; vec3 emission = vec3(0.0,0.0,0.0); float roughness = 1.0; float rim = 0.0; @@ -1275,13 +1277,7 @@ FRAGMENT_SHADER_CODE vec3 eye_vec = -normalize( vertex_interp ); -#ifndef RENDER_DEPTH - float ndotv = clamp(dot(normal,eye_vec),0.0,1.0); - vec2 brdf = texture(brdf_texture, vec2(roughness, ndotv)).xy; - brdf.x=1.0; - brdf.y=0.0; -#endif #ifdef USE_RADIANCE_MAP @@ -1299,7 +1295,7 @@ FRAGMENT_SHADER_CODE vec3 ref_vec = reflect(-eye_vec,normal); //2.0 * ndotv * normal - view; // reflect(v, n); ref_vec=normalize((radiance_inverse_xform * vec4(ref_vec,0.0)).xyz); vec3 radiance = textureDualParabolod(radiance_map,ref_vec,lod) * bg_energy; - specular_light = radiance * brdf.x + brdf.y; + specular_light = radiance; } //no longer a cubemap @@ -1467,7 +1463,7 @@ FRAGMENT_SHADER_CODE #endif //LIGHT_DIRECTIONAL_SHADOW - light_compute(normal,-light_direction_attenuation.xyz,eye_vec,binormal,tangent,light_color_energy.rgb*light_attenuation,albedo,specular,light_params.z,roughness,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); + light_compute(normal,-light_direction_attenuation.xyz,eye_vec,binormal,tangent,light_color_energy.rgb*light_attenuation,albedo,light_params.z,roughness,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); #endif //#USE_LIGHT_DIRECTIONAL @@ -1485,7 +1481,7 @@ FRAGMENT_SHADER_CODE for(int i=0;i<reflection_count;i++) { - reflection_process(reflection_indices[i],vertex,normal,binormal,tangent,roughness,anisotropy,ambient_light,specular_light,brdf,reflection_accum,ambient_accum); + reflection_process(reflection_indices[i],vertex,normal,binormal,tangent,roughness,anisotropy,ambient_light,specular_light,reflection_accum,ambient_accum); } if (reflection_accum.a>0.0) { @@ -1496,11 +1492,11 @@ FRAGMENT_SHADER_CODE } for(int i=0;i<omni_light_count;i++) { - light_process_omni(omni_light_indices[i],vertex,eye_vec,normal,binormal,tangent,albedo,specular,roughness,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); + light_process_omni(omni_light_indices[i],vertex,eye_vec,normal,binormal,tangent,albedo,roughness,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); } for(int i=0;i<spot_light_count;i++) { - light_process_spot(spot_light_indices[i],vertex,eye_vec,normal,binormal,tangent,albedo,specular,roughness,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); + light_process_spot(spot_light_indices[i],vertex,eye_vec,normal,binormal,tangent,albedo,roughness,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); } @@ -1530,10 +1526,29 @@ LIGHT_SHADER_CODE ambient_light*=ao; #endif - //energy conservation - diffuse_light=mix(diffuse_light,vec3(0.0),specular); - ambient_light=mix(ambient_light,vec3(0.0),specular); - specular_light *= max(vec3(0.04),specular); + + + + + + //energu conservation + diffuse_light=mix(diffuse_light,vec3(0.0),metallic); + ambient_light=mix(ambient_light,vec3(0.0),metallic); + { + //brdf approximation (Lazarov 2013) + float ndotv = clamp(dot(normal,eye_vec),0.0,1.0); + + //energy conservation + vec3 dielectric = vec3(0.034) * 0.5 * 2.0; + vec3 f0 = mix(dielectric, albedo, metallic); + const vec4 c0 = vec4(-1.0, -0.0275, -0.572, 0.022); + const vec4 c1 = vec4( 1.0, 0.0425, 1.04, -0.04); + vec4 r = roughness * c0 + c1; + float a004 = min( r.x * r.x, exp2( -9.28 * ndotv ) ) * r.x + r.y; + vec2 brdf = vec2( -1.04, 1.04 ) * a004 + r.zw; + + specular_light *= min(1.0,50.0 * f0.g) * brdf.y + brdf.x * f0; + } #ifdef USE_MULTIPLE_RENDER_TARGETS |