144 lines
4.1 KiB
GLSL
144 lines
4.1 KiB
GLSL
#version 330
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// A struct is used for what would normally be attributes from the vert/geom shader.
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struct VertexAttributes
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{
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vec3 objectPosition;
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vec2 texCoord;
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vec2 texCoord2;
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vec2 texCoord3;
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vec4 vertexColor;
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vec3 normal;
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vec3 viewNormal;
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vec3 tangent;
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vec3 bitangent;
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};
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uniform mat4 sphereMatrix;
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uniform sampler2D SphereMap;
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uniform samplerCube specularIbl;
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uniform int HasSphereMap;
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uniform int hasTangents;
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// Defined in Utility.frag.
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float Luminance(vec3 rgb);
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vec3 SpecularPass(vec3 I, vec3 normal, int HasSpecularMap, sampler2D SpecularMap, vec3 SpecColor, VertexAttributes vert, float texcoord2, int UseSpecularColor)
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{
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float specBrdf = max(dot(I, normal), 0);
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float exponent = 8;
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if (SpecColor == vec3(0)) //Color shouldn't be black unless it's not set
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SpecColor = vec3(1);
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if (HasSpecularMap == 0)
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{
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return 0.1 * SpecColor * pow(specBrdf, exponent);
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}
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vec2 SpecTexCoord = vert.texCoord;
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if (texcoord2 == 1)
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SpecTexCoord = vert.texCoord2;
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vec3 Specular = texture(SpecularMap, SpecTexCoord).rgb;
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if (UseSpecularColor == 0)
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Specular = texture(SpecularMap, SpecTexCoord).rrr;
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// TODO: Different games use the channels for separate textures.
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vec3 result = Specular * SpecColor * pow(specBrdf, exponent);
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result *= SpecColor.rgb;
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float intensity = 0.3;
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return result * intensity;
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}
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vec3 EmissionPass(sampler2D EmissionMap, float emission_intensity, VertexAttributes vert, float texCoordIndex, vec3 emission_color)
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{
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vec3 result = vec3(0);
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// BOTW somtimes uses second uv channel for emission map
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vec3 emission = vec3(1);
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if (texCoordIndex == 1)
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emission = texture2D(EmissionMap, vert.texCoord2).rgb;
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else
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emission = texture2D(EmissionMap, vert.texCoord).rgb;
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// If tex is empty then use full brightness.
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//Some emissive mats have emission but no texture
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// if (Luminance(emission.rgb) < 0.01)
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// result += vec3(emission_intensity) * emission_color;
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result += emission.rgb;
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return result;
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}
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vec3 SphereMapColor(vec3 viewNormal, sampler2D spheremap) {
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// Calculate UVs based on view space normals.
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vec2 sphereTexcoord = vec2(viewNormal.x, (1 - viewNormal.y));
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return texture(spheremap, sphereTexcoord * 0.5 + 0.5).rgb;
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}
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vec3 ReflectionPass(vec3 N, vec3 I, vec4 diffuseMap, vec3 Specular, float aoBlend, vec3 tintColor, VertexAttributes vert) {
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vec3 reflectionPass = vec3(0);
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// cubemap reflection
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vec3 R = reflect(-I, N);
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int maxSpecularLod = 8;
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vec3 cubeColor = textureLod(specularIbl, R, maxSpecularLod).rgb;
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reflectionPass += cubeColor * Specular;
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vec3 viewNormal = mat3(sphereMatrix) * normalize(N.xyz);
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vec3 sphereMapColor = SphereMapColor(vert.viewNormal, SphereMap);
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reflectionPass += sphereMapColor * HasSphereMap;
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reflectionPass = max(reflectionPass, vec3(0));
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return reflectionPass;
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}
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float AmbientOcclusionBlend(sampler2D BakeShadowMap, VertexAttributes vert, float ao_density)
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{
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float aoMap = texture(BakeShadowMap, vert.texCoord2).r;
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return mix(aoMap, 1, ao_density);
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}
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vec3 CalculateTangent()
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{
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vec3 tangent = vec3(0);
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return tangent;
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}
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vec3 CalcBumpedNormal(vec3 inputNormal, sampler2D normalMap, VertexAttributes vert, float texCoordIndex)
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{
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float normalIntensity = 1;
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//if (normal_map_weight != 0) //MK8 and splatoon 1/2 uses this param
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// normalIntensity = normal_map_weight;
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// Calculate the resulting normal map and intensity.
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vec3 normalMapColor = vec3(1);
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if (texCoordIndex == 1)
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normalMapColor = vec3(texture(normalMap, vert.texCoord2).rg, 1);
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else
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normalMapColor = vec3(texture(normalMap, vert.texCoord).rg, 1);
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normalMapColor = mix(vec3(0.5, 0.5, 1), normalMapColor, normalIntensity);
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// Remap the normal map to the correct range.
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vec3 normalMapNormal = 2.0 * normalMapColor - vec3(1);
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// TBN Matrix.
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vec3 T = vert.tangent;
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vec3 B = vert.bitangent;
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if (Luminance(B) < 0.01)
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B = normalize(cross(T, vert.normal));
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mat3 tbnMatrix = mat3(T, B, vert.normal);
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vec3 newNormal = tbnMatrix * normalMapNormal;
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return normalize(newNormal);
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} |