1 files changed, 107 insertions, 0 deletions
diff --git a/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.vert b/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.vert
new file mode 100644
index 0000000..a3a1cc2
--- /dev/null
+++ b/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.vert
@@ -0,0 +1,107 @@
+uniform mat4 g_WorldViewProjectionMatrix;
+uniform mat4 g_WorldViewMatrix;
+uniform mat3 g_NormalMatrix;
+uniform mat4 g_ViewMatrix;
+
+uniform vec4 g_LightColor;
+uniform vec4 g_LightPosition;
+uniform vec4 g_AmbientLightColor;
+
+uniform float m_Shininess;
+
+attribute vec3 inPosition;
+attribute vec3 inNormal;
+attribute vec2 inTexCoord;
+attribute vec4 inTangent;
+
+varying vec3 vNormal;
+varying vec2 texCoord;
+varying vec3 vPosition;
+varying vec3 vnPosition;
+varying vec3 vViewDir;
+varying vec3 vnViewDir;
+varying vec4 vLightDir;
+varying vec4 vnLightDir;
+
+varying vec3 lightVec;
+
+varying vec4 AmbientSum;
+varying vec4 DiffuseSum;
+varying vec4 SpecularSum;
+
+#ifdef TRI_PLANAR_MAPPING
+  varying vec4 wVertex;
+  varying vec3 wNormal;
+#endif
+
+// JME3 lights in world space
+void lightComputeDir(in vec3 worldPos, in vec4 color, in vec4 position, out vec4 lightDir){
+    float posLight = step(0.5, color.w);
+    vec3 tempVec = position.xyz * sign(posLight - 0.5) - (worldPos * posLight);
+    lightVec.xyz = tempVec;  
+    float dist = length(tempVec);
+    lightDir.w = clamp(1.0 - position.w * dist * posLight, 0.0, 1.0);
+    lightDir.xyz = tempVec / vec3(dist);
+}
+
+
+void main(){
+    vec4 pos = vec4(inPosition, 1.0);
+    gl_Position = g_WorldViewProjectionMatrix * pos;
+    #ifdef TERRAIN_GRID
+    texCoord = inTexCoord * 2.0;
+    #else
+    texCoord = inTexCoord;
+    #endif
+
+    vec3 wvPosition = (g_WorldViewMatrix * pos).xyz;
+    vec3 wvNormal  = normalize(g_NormalMatrix * inNormal);
+    vec3 viewDir = normalize(-wvPosition);
+
+    vec4 wvLightPos = (g_ViewMatrix * vec4(g_LightPosition.xyz,clamp(g_LightColor.w,0.0,1.0)));
+    wvLightPos.w = g_LightPosition.w;
+    vec4 lightColor = g_LightColor;
+
+    //--------------------------
+    // specific to normal maps:
+    //--------------------------
+    #if defined(NORMALMAP) || defined(NORMALMAP_1) || defined(NORMALMAP_2) || defined(NORMALMAP_3) || defined(NORMALMAP_4) || defined(NORMALMAP_5) || defined(NORMALMAP_6) || defined(NORMALMAP_7) || defined(NORMALMAP_8) || defined(NORMALMAP_9) || defined(NORMALMAP_10) || defined(NORMALMAP_11)
+      vec3 wvTangent = normalize(g_NormalMatrix * inTangent.xyz);
+      vec3 wvBinormal = cross(wvNormal, wvTangent);
+
+      mat3 tbnMat = mat3(wvTangent, wvBinormal * -inTangent.w,wvNormal);
+
+      vPosition = wvPosition * tbnMat;
+      vViewDir  = viewDir * tbnMat;
+      lightComputeDir(wvPosition, lightColor, wvLightPos, vLightDir);
+      vLightDir.xyz = (vLightDir.xyz * tbnMat).xyz;
+    #else
+
+    //-------------------------
+    // general to all lighting
+    //-------------------------
+    vNormal = wvNormal;
+
+    vPosition = wvPosition;
+    vViewDir = viewDir;
+
+    lightComputeDir(wvPosition, lightColor, wvLightPos, vLightDir);
+
+    #endif
+   
+      //computing spot direction in view space and unpacking spotlight cos
+  // spotVec=(g_ViewMatrix *vec4(g_LightDirection.xyz,0.0) );
+  // spotVec.w=floor(g_LightDirection.w)*0.001;
+  // lightVec.w = fract(g_LightDirection.w);
+
+    AmbientSum  = vec4(0.2, 0.2, 0.2, 1.0) * g_AmbientLightColor; // Default: ambient color is dark gray
+    DiffuseSum  = lightColor;
+    SpecularSum = lightColor;
+
+
+#ifdef TRI_PLANAR_MAPPING
+    wVertex = vec4(inPosition,0.0);
+    wNormal = inNormal;
+#endif
+
+}
+\ No newline at end of file