1 files changed, 38 insertions, 0 deletions
diff --git a/src/extras/shaders/es2/normaldiffusemap.vert b/src/extras/shaders/es2/normaldiffusemap.vert
new file mode 100644
index 000000000..ecc689f69
--- /dev/null
+++ b/src/extras/shaders/es2/normaldiffusemap.vert
@@ -0,0 +1,38 @@
+attribute vec3 vertexPosition;
+attribute vec3 vertexNormal;
+attribute vec2 vertexTexCoord;
+attribute vec4 vertexTangent;
+
+varying vec3 worldPosition;
+varying vec2 texCoord;
+varying mat3 tangentMatrix;
+
+uniform mat4 modelMatrix;
+uniform mat3 modelNormalMatrix;
+uniform mat4 projectionMatrix;
+uniform mat4 mvp;
+
+uniform float texCoordScale;
+
+void main()
+{
+    // Pass through texture coordinates
+    texCoord = vertexTexCoord * texCoordScale;
+
+    // Transform position, normal, and tangent to world coords
+    vec3 normal = normalize( modelNormalMatrix * vertexNormal );
+    vec3 tangent = normalize( modelNormalMatrix * vertexTangent.xyz );
+    worldPosition = vec3( modelMatrix * vec4( vertexPosition, 1.0 ) );
+
+    // Calculate binormal vector
+    vec3 binormal = normalize( cross( normal, tangent ) );
+
+    // Construct matrix to transform from eye coords to tangent space
+    tangentMatrix = mat3 (
+                tangent.x, binormal.x, normal.x,
+                tangent.y, binormal.y, normal.y,
+                tangent.z, binormal.z, normal.z );
+
+    // Calculate vertex position in clip coordinates
+    gl_Position = mvp * vec4( vertexPosition, 1.0 );
+}