1 files changed, 86 insertions, 0 deletions
diff --git a/engine/src/core-data/Common/MatDefs/Light/GBuf.frag b/engine/src/core-data/Common/MatDefs/Light/GBuf.frag
new file mode 100644
index 0000000..3970624
--- /dev/null
+++ b/engine/src/core-data/Common/MatDefs/Light/GBuf.frag
@@ -0,0 +1,86 @@
+#import "Common/ShaderLib/Optics.glsllib"
+
+uniform float m_Shininess;
+
+varying vec2 texCoord;
+varying vec4 AmbientSum;
+varying vec4 DiffuseSum;
+varying vec4 SpecularSum;
+
+varying float vDepth;
+varying vec3 vNormal;
+
+#ifdef DIFFUSEMAP
+  uniform sampler2D m_DiffuseMap;
+#endif
+
+#ifdef SPECULARMAP
+  uniform sampler2D m_SpecularMap;
+#endif
+
+#ifdef PARALLAXMAP
+  uniform sampler2D m_ParallaxMap;
+#endif
+
+#ifdef NORMALMAP
+  uniform sampler2D m_NormalMap;
+  varying mat3 tbnMat;
+#endif
+
+vec2 encodeNormal(in vec3 n){
+    vec2 enc = normalize(n.xy) * (sqrt(-n.z*0.5+0.5));
+    enc = enc*vec2(0.5)+vec2(0.5);
+    return enc;
+}
+
+void main(){
+    vec2 newTexCoord = texCoord;
+    float height = 0.0;
+    #if defined(PARALLAXMAP) || defined(NORMALMAP_PARALLAX)
+       #ifdef PARALLAXMAP
+          height = texture2D(m_ParallaxMap, texCoord).r;
+       #else
+          height = texture2D(m_NormalMap, texCoord).a;
+       #endif
+       float heightScale = 0.05;
+       float heightBias = heightScale * -0.5;
+       height = (height * heightScale + heightBias);
+    #endif
+
+
+    // ***********************
+    // Read from textures
+    // ***********************
+    #if defined(NORMALMAP) && !defined(VERTEX_LIGHTING)
+      vec4 normalHeight = texture2D(m_NormalMap, newTexCoord);
+      vec3 normal = (normalHeight.xyz * vec3(2.0) - vec3(1.0));
+      normal.y = -normal.y;
+
+      normal = tbnMat * normal;
+    #else
+      vec3 normal = vNormal;
+      #if !defined(LOW_QUALITY) && !defined(V_TANGENT)
+         normal = normalize(normal);
+      #endif
+    #endif
+
+    #ifdef DIFFUSEMAP
+      vec4 diffuseColor = texture2D(m_DiffuseMap, newTexCoord);
+    #else
+      vec4 diffuseColor = vec4(1.0);
+    #endif
+
+    #ifdef SPECULARMAP
+      vec4 specularColor = texture2D(m_SpecularMap, newTexCoord);
+    #else
+      vec4 specularColor = vec4(1.0);
+    #endif
+
+    diffuseColor.rgb  *= DiffuseSum.rgb;
+    specularColor.rgb *= SpecularSum.rgb;
+
+    gl_FragData[0] = vec4(diffuseColor.rgb, 1.0);
+    gl_FragData[1] = vec4(encodeNormal(normal), 0.0, 0.0);
+                          /*encodeNormal(vNormal));*/
+    gl_FragData[2] = vec4(specularColor.rgb, m_Shininess / 128.0);
+}