diff options
Diffstat (limited to 'src/renderergl2/glsl/lightall_fp.glsl')
| -rw-r--r-- | src/renderergl2/glsl/lightall_fp.glsl | 44 |
1 files changed, 26 insertions, 18 deletions
diff --git a/src/renderergl2/glsl/lightall_fp.glsl b/src/renderergl2/glsl/lightall_fp.glsl index c0d2bc80..6c8977e1 100644 --- a/src/renderergl2/glsl/lightall_fp.glsl +++ b/src/renderergl2/glsl/lightall_fp.glsl @@ -150,11 +150,11 @@ float RayIntersectDisplaceMap(vec2 dp, vec2 ds, sampler2D normalMap) } #endif -vec3 CalcDiffuse(vec3 diffuseAlbedo, float EH, float NH, float r) +vec3 CalcDiffuse(vec3 diffuseAlbedo, float EH, float NH, float roughness) { #if defined(USE_BURLEY) // modified from https://disney-animation.s3.amazonaws.com/library/s2012_pbs_disney_brdf_notes_v2.pdf - float fd90 = -0.5 + EH * EH * r; + float fd90 = -0.5 + EH * EH * roughness; float burley = 1.0 + fd90 * 0.04 / NH; burley *= burley; return diffuseAlbedo * burley; @@ -163,21 +163,21 @@ vec3 CalcDiffuse(vec3 diffuseAlbedo, float EH, float NH, float r) #endif } -vec3 EnvironmentBRDF(float r, float NE, vec3 specular) +vec3 EnvironmentBRDF(float roughness, float NE, vec3 specular) { // from http://community.arm.com/servlet/JiveServlet/download/96891546-19496/siggraph2015-mmg-renaldas-slides.pdf - float v = 1.0 - max(r, NE); + float v = 1.0 - max(roughness, NE); v *= v * v; return vec3(v) + specular; } -vec3 CalcSpecular(vec3 specular, float NH, float NL, float NE, float EH, float r) +vec3 CalcSpecular(vec3 specular, float NH, float NL, float NE, float EH, float roughness) { // from http://community.arm.com/servlet/JiveServlet/download/96891546-19496/siggraph2015-mmg-renaldas-slides.pdf - float rr = r*r; + float rr = roughness*roughness; float rrrr = rr*rr; float d = (NH * NH) * (rrrr - 1.0) + 1.0; - float v = (EH * EH) * (r + 0.5); + float v = (EH * EH) * (roughness + 0.5); return specular * (rrrr / (4.0 * d * d * v)); } @@ -276,6 +276,11 @@ void main() attenuation = 1.0; #endif + #if defined(r_lightGamma) + lightColor = pow(lightColor, vec3(r_lightGamma)); + ambientColor = pow(ambientColor, vec3(r_lightGamma)); + #endif + #if defined(USE_NORMALMAP) #if defined(SWIZZLE_NORMALMAP) N.xy = texture2D(u_NormalMap, texCoords).ag - vec2(0.5); @@ -304,11 +309,6 @@ void main() #endif #endif - #if defined(r_lightGamma) - lightColor = pow(lightColor, vec3(r_lightGamma)); - ambientColor = pow(ambientColor, vec3(r_lightGamma)); - #endif - #if defined(USE_LIGHTMAP) || defined(USE_LIGHT_VERTEX) ambientColor = lightColor; float surfNL = clamp(dot(var_Normal.xyz, L), 0.0, 1.0); @@ -343,7 +343,11 @@ void main() #endif float gloss = specular.a; - float r = exp2(-3.0 * gloss); + #if defined(GLOSS_IS_ROUGHNESS) + float roughness = gloss; + #else + float roughness = exp2(-3.0 * gloss); + #endif #if defined(SPECULAR_IS_METALLIC) // diffuse is actually base color, and green of specular is metallicness @@ -356,20 +360,20 @@ void main() diffuse.rgb *= vec3(1.0) - specular.rgb; #endif - reflectance = CalcDiffuse(diffuse.rgb, EH, NH, r); + reflectance = CalcDiffuse(diffuse.rgb, EH, NH, roughness); #if defined(USE_SHADOWMAP) && defined(SHADOWMAP_MODULATE) // bit of a hack, with modulated shadowmaps, add specular to sunlight H = normalize(var_PrimaryLightDir.xyz + E); EH = clamp(dot(E, H), 0.0, 1.0); NH = clamp(dot(N, H), 0.0, 1.0); - reflectance += shadowValue * CalcSpecular(specular.rgb, NH, NL, NE, EH, r); + reflectance += shadowValue * CalcSpecular(specular.rgb, NH, NL, NE, EH, roughness); #endif gl_FragColor.rgb = lightColor * reflectance * (attenuation * NL); gl_FragColor.rgb += ambientColor * (diffuse.rgb + specular.rgb); #if defined(USE_CUBEMAP) - reflectance = EnvironmentBRDF(r, NE, specular.rgb); + reflectance = EnvironmentBRDF(roughness, NE, specular.rgb); vec3 R = reflect(E, N); @@ -377,7 +381,11 @@ void main() // from http://seblagarde.wordpress.com/2012/09/29/image-based-lighting-approaches-and-parallax-corrected-cubemap/ vec3 parallax = u_CubeMapInfo.xyz + u_CubeMapInfo.w * viewDir; + #if defined(GLOSS_IS_ROUGHNESS) + vec3 cubeLightColor = textureCubeLod(u_CubeMap, R + parallax, roughness).rgb * u_EnableTextures.w; + #else vec3 cubeLightColor = textureCubeLod(u_CubeMap, R + parallax, 7.0 - gloss * 7.0).rgb * u_EnableTextures.w; + #endif // normalize cubemap based on lowest mip (~diffuse) // multiplying cubemap values by lighting below depends on either this or the cubemap being normalized at generation @@ -411,8 +419,8 @@ void main() EH2 = clamp(dot(E, H2), 0.0, 1.0); NH2 = clamp(dot(N, H2), 0.0, 1.0); - reflectance = CalcDiffuse(diffuse.rgb, EH2, NH2, r); - reflectance += CalcSpecular(specular.rgb, NH2, NL2, NE, EH2, r); + reflectance = CalcDiffuse(diffuse.rgb, EH2, NH2, roughness); + reflectance += CalcSpecular(specular.rgb, NH2, NL2, NE, EH2, roughness); lightColor = u_PrimaryLightColor * var_Color.rgb; |