Add the shader files.

examples/OpenGLWindow/Shaders/projectiveTextureInstancingPS.glsl

@@ -0,0 +1,72 @@
+#version 330 core
+//precision highp float;
+
+in Fragment
+{
+     vec4 color;
+} fragment;
+
+in Vert
+{
+	vec2 texcoord;
+} vert;
+
+uniform sampler2D Diffuse;
+uniform mat4 ViewMatrixInverse;
+
+in vec3 lightPos,cameraPosition, normal,ambient;
+in vec4 vertexPos;
+in float materialShininess;
+in vec3 lightSpecularIntensity;
+in vec3 materialSpecularColor;
+
+out vec4 color;
+
+
+
+void main(void)
+{
+	vec4 texel = fragment.color*texture(Diffuse,vert.texcoord.xy);
+	vec3 ct,cf;
+	float intensity,at,af;
+	if (fragment.color.w==0)
+		discard;
+	vec3 lightDir = normalize(lightPos);
+	
+	vec3 normalDir = normalize(normal);
+ 
+	intensity = 0.5+0.5*clamp( dot( normalDir,lightDir ), -1,1 );
+	
+	af = 1.0;
+		
+	ct = texel.rgb;
+	at = texel.a;
+		
+	//float bias = 0.005f;
+	
+	vec3 specularReflection;
+	
+	if (dot(normalDir, lightDir) < 0.0) 
+	{
+		specularReflection = vec3(0.0, 0.0, 0.0);
+	}
+  else // light source on the right side
+	{
+		vec3 surfaceToLight = normalize(lightPos - vertexPos.xyz);
+    vec3 surfaceToCamera = normalize(cameraPosition - vertexPos.xyz);
+    
+    
+    float specularCoefficient = 0.0;
+		specularCoefficient = pow(max(0.0, dot(surfaceToCamera, reflect(-surfaceToLight, normalDir))), materialShininess);
+    specularReflection = specularCoefficient * materialSpecularColor * lightSpecularIntensity;
+  
+	}
+    
+
+	float visibility = 1.0;
+
+	intensity = 0.7*intensity  + 0.3*intensity*visibility;
+	
+	cf = intensity*(vec3(1.0,1.0,1.0)-ambient)+ambient+specularReflection*visibility;
+	color  = vec4(ct * cf, fragment.color.w);
+}