Implemented specular reflective lighting for OpenGL 3.x, everything looks shiny (will add APIs to make it less shiny ;-)

Remove roof from kitchens/1.sdf, otherwise shadows and shinyness won't work (light is outside the room, bouncing against roof-top)
Make kuka_iiwa/model.urdf more smooth, use .obj for per-vertex normals (using Blender, import STL, export OBJ, enable triangles, normals and Z-UP, Y forward)

examples/OpenGLWindow/Shaders/useShadowMapInstancingVS.glsl

@@ -15,7 +15,12 @@ uniform mat4 ModelViewMatrix;
 uniform mat4 ProjectionMatrix;
 uniform mat4 DepthBiasModelViewProjectionMatrix;
 uniform mat4 MVP;
-uniform vec3 lightDirIn;
+uniform vec3 lightPosIn;
+uniform vec3 cameraPositionIn;
+uniform mat4 ViewMatrixInverse;
+uniform float materialShininessIn;
+uniform vec3 lightSpecularIntensityIn;
+uniform vec3 materialSpecularColorIn;
 
 out vec4 ShadowCoord;
 
@@ -60,7 +65,13 @@ vec4 quatRotate ( in vec4 p, in vec4 q )
     return quatMul ( temp, vec4 ( -q.x, -q.y, -q.z, q.w ) );
 }
 
-out vec3 lightDir,normal,ambient;
+out vec3 lightPos,normal,ambient;
+out vec4 vertexPos;
+out vec3 cameraPosition;
+out float materialShininess;
+out vec3 lightSpecularIntensity;
+out vec3 materialSpecularColor;
+
 
 void main(void)
 {
@@ -69,15 +80,19 @@ void main(void)
 			
 	vec4 worldNormal = (quatRotate3( vertexnormal,q));
 	
-	normal = normalize(worldNormal).xyz;
+	normal = worldNormal.xyz;
 
-	lightDir = lightDirIn;
-		
+	lightPos = lightPosIn;
+	cameraPosition = cameraPositionIn;
+	materialShininess = materialShininessIn;
+	lightSpecularIntensity = lightSpecularIntensityIn;
+	materialSpecularColor = materialSpecularColorIn;
 	
 	vec4 localcoord = quatRotate3( position.xyz*instance_scale,q);
-	vec4 vertexPos = MVP* vec4((instance_position+localcoord).xyz,1);
-
-	gl_Position = vertexPos;
+	vertexPos = vec4((instance_position+localcoord).xyz,1);
+	
+	vec4 vertexLoc = MVP* vec4((instance_position+localcoord).xyz,1);
+	gl_Position = vertexLoc;
 	ShadowCoord = DepthBiasModelViewProjectionMatrix * vec4((instance_position+localcoord).xyz,1);
 
 	fragment.color = instance_color;