Initial import of KREngine

--HG--
extra : convert_revision : svn%3A7752d6cf-9f14-4ad2-affc-04f1e67b81a5/trunk%404

objview/Classes/krengine/Shaders/ShadowShader.vsh

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+const mediump vec3		LightPos = vec3(40, 20.0, -90.0);
+
+attribute highp vec3	myVertex, myNormal;
+attribute highp vec3    myTangent;
+attribute mediump vec2	myUV;
+uniform highp mat4      myMVPMatrix, myModelView; // mvpmatrix is the result of multiplying the model, view, and projection matrices 
+uniform highp mat3      myModelViewIT;
+uniform lowp vec3       material_ambient, material_diffuse, material_specular;
+
+varying mediump vec2	texCoord;
+/*
+ varying mediump vec3    lightVec;
+ varying mediump vec3    halfVec;
+ */
+
+
+//varying mediump vec3    eyeVec;
+
+void main()
+{
+    // Transform position
+    gl_Position = myMVPMatrix * vec4(myVertex,1.0);
+    
+    // Pass UV co-ordinates
+    texCoord = myUV.st;
+    
+    /*
+     
+     // Building the matrix Eye Space -> Tangent Space
+     vec3 n = normalize(vec3(myModelView * vec4(myNormal, 1.0)));
+     vec3 t = normalize(vec3(myModelView * vec4(myTangent, 1.0)));
+     vec3 b = cross(n, t);
+     
+     vec3 vertexPosition = vec3(myMVPMatrix * vec4(myVertex, 1.0));
+     vec3 lightDir = normalize(LightPos - vertexPosition);
+     
+     // transform light and half angle vectors by tangent basis
+     vec3 v;
+     v.x = dot(lightDir, t);
+     v.y = dot(lightDir, b);
+     v.z = dot(lightDir, n);
+     lightVec = normalize(v);
+     
+     //  v.x = dot(vertexPosition, t);
+     //	v.y = dot(vertexPosition, b);
+     //	v.z = dot(vertexPosition, n);
+     //	eyeVec = normalize(v);
+     
+     vertexPosition = normalize(vertexPosition);
+     
+     // Normalize the halfVector to pass it to the fragment shader
+     vec3 halfVector = normalize((vertexPosition + lightDir) / 2.0);
+     v.x = dot (halfVector, t);
+     v.y = dot (halfVector, b);
+     v.z = dot (halfVector, n);
+     halfVec = normalize (v);
+     */
+}