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Standard shader: Refactoring;

This commit is contained in:
bjorn 2019-08-11 18:15:43 -07:00
parent 3d8313a7f1
commit 51b4064801
1 changed files with 18 additions and 18 deletions
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36
src/resources/shaders.c
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@ -119,8 +119,8 @@ const char* lovrUnlitFragmentShader = ""
"}";
const char* lovrStandardVertexShader = ""
"out vec3 vWorldPosition; \n"
"out vec3 vCameraPosition; \n"
"out vec3 vVertexPositionWorld; \n"
"out vec3 vCameraPositionWorld; \n"
"#ifdef FLAG_normalTexture \n"
"out mat3 vTangentMatrix; \n"
"#else \n"
@ -128,8 +128,8 @@ const char* lovrStandardVertexShader = ""
"#endif \n"
"vec4 position(mat4 projection, mat4 transform, vec4 vertex) { \n"
" vWorldPosition = vec3(lovrModel * vertex); \n"
" vCameraPosition = -lovrView[3].xyz * mat3(lovrView); \n"
" vVertexPositionWorld = vec3(lovrModel * vertex); \n"
" vCameraPositionWorld = -lovrView[3].xyz * mat3(lovrView); \n"
"#ifdef FLAG_normalTexture \n"
" vec3 normal = normalize(mat3(lovrModel) * lovrNormal); // TODO non-uniform scale \n"
" vec3 tangent = normalize(mat3(lovrModel) * lovrTangent.xyz); \n"
@ -143,8 +143,8 @@ const char* lovrStandardVertexShader = ""
const char* lovrStandardFragmentShader = ""
"#define PI 3.14159265358979 \n"
"in vec3 vWorldPosition; \n"
"in vec3 vCameraPosition; \n"
"in vec3 vVertexPositionWorld; \n"
"in vec3 vCameraPositionWorld; \n"
"#ifdef FLAG_normalTexture \n"
"in mat3 vTangentMatrix; \n"
"#else \n"
@ -153,8 +153,8 @@ const char* lovrStandardFragmentShader = ""
"uniform vec3 lovrLightDirection; \n"
"uniform vec4 lovrLightColor; \n"
"uniform samplerCube lovrSpecularIrradianceTexture; \n"
"uniform vec3 lovrIrradiance[9]; \n"
"uniform samplerCube lovrEnvironmentMap; \n"
"uniform vec3 lovrSphericalHarmonics[9]; \n"
"uniform float lovrExposure; \n"
"float D_GGX(float NoH, float roughness); \n"
@ -165,7 +165,7 @@ const char* lovrStandardFragmentShader = ""
"vec3 tonemap_ACES(vec3 color); \n"
"vec4 color(vec4 graphicsColor, sampler2D image, vec2 uv) { \n"
" vec3 color = vec3(0.); \n"
" vec3 result = vec3(0.); \n"
// Parameters
" vec3 baseColor = texture(lovrDiffuseTexture, uv).rgb * lovrDiffuseColor.rgb; \n"
@ -176,7 +176,7 @@ const char* lovrStandardFragmentShader = ""
"#else \n"
" vec3 N = normalize(vNormal); \n"
"#endif \n"
" vec3 V = normalize(vCameraPosition - vWorldPosition); \n"
" vec3 V = normalize(vCameraPositionWorld - vVertexPositionWorld); \n"
" vec3 L = normalize(-lovrLightDirection); \n"
" vec3 H = normalize(V + L); \n"
" vec3 R = normalize(reflect(-V, N)); \n"
@ -192,31 +192,31 @@ const char* lovrStandardFragmentShader = ""
" vec3 F = F_Schlick(F0, VoH); \n"
" vec3 specularDirect = vec3(D * G * F); \n"
" vec3 diffuseDirect = (vec3(1.) - F) * (1. - metalness) * baseColor; \n"
" color += (diffuseDirect / PI + specularDirect) * NoL * lovrLightColor.rgb * lovrLightColor.a; \n"
" result += (diffuseDirect / PI + specularDirect) * NoL * lovrLightColor.rgb * lovrLightColor.a; \n"
// Indirect lighting
"#ifdef FLAG_indirectLighting \n"
" vec2 lookup = prefilteredBRDF(NoV, roughness); \n"
" float mipmapCount = log2(textureSize(lovrSpecularIrradianceTexture, 0).x); \n"
" vec3 specularIndirect = (F0 * lookup.r + lookup.g) * textureLod(lovrSpecularIrradianceTexture, R, roughness * mipmapCount).rgb; \n"
" vec3 diffuseIndirect = diffuseDirect * E_SphericalHarmonics(lovrIrradiance, N); \n"
" float mipmapCount = log2(textureSize(lovrEnvironmentMap, 0).x); \n"
" vec3 specularIndirect = (F0 * lookup.r + lookup.g) * textureLod(lovrEnvironmentMap, R, roughness * mipmapCount).rgb; \n"
" vec3 diffuseIndirect = diffuseDirect * E_SphericalHarmonics(lovrSphericalHarmonics, N); \n"
"#ifdef FLAG_occlusion \n" // Occlusion only affects indirect diffuse light
" diffuseIndirect *= texture(lovrOcclusionTexture, uv).r; \n"
"#endif \n"
" color += diffuseIndirect + specularIndirect; \n"
" result += diffuseIndirect + specularIndirect; \n"
"#endif \n"
// Emissive
"#ifdef FLAG_emissive \n" // Currently emissive texture and color have to be used together
" color += texture(lovrEmissiveTexture, uv).rgb * lovrEmissiveColor.rgb; \n"
" result += texture(lovrEmissiveTexture, uv).rgb * lovrEmissiveColor.rgb; \n"
"#endif \n"
// Tonemap
"#ifdef FLAG_tonemap \n"
" color = tonemap_ACES(color * lovrExposure); \n"
" result = tonemap_ACES(result * lovrExposure); \n"
"#endif \n"
" return vec4(color, 1.); \n"
" return vec4(result, 1.); \n"
"}"
// Helpers