flat colorperface modification

include/Utils/Shaders/shaderFlatColorPerFace.geom

@@ -6,7 +6,7 @@ uniform mat4 ModelViewMatrix;
 uniform vec3 lightPosition;
 uniform vec4 ambient;
 
-VARYING_IN vec3 colorVertex[];
+VARYING_IN vec3 colorVertex[3]; // input is triangles -> 3
 VARYING_OUT vec4 ColorFS;
 
 void main(void)
@@ -20,26 +20,37 @@ void main(void)
 	vec4 newPos =  ModelViewMatrix * vec4(center,0.0);
 	vec3 L =  normalize (lightPosition - newPos.xyz);
 	float lambertTerm = dot(N,L);
-		
+
+#ifdef AVERGAGE_COLOR		
 	int i;
 	vec3 averageColor=vec3(0.,0.,0.);
-	for(i=0; i< NBVERTS_IN; i++)
-	{
+	for(i=0; i< 3; i++)
 		averageColor +=colorVertex[i];
-	}
-
-	averageColor /= float(NBVERTS_IN);
+	averageColor /= 3.0;
 	
 	ColorFS = ambient;
 	if(lambertTerm > 0.0)
 		ColorFS += vec4(averageColor,1.0) * lambertTerm;
 			
-	for(i=0; i< NBVERTS_IN; i++)
+	for(i=0; i< 3; i++)
+	{
+		vec4 pos =  explode * POSITION_IN(i) + (1.0-explode)* vec4(center,1.0);
+		gl_Position = ModelViewProjectionMatrix *  pos;	
+		EmitVertex();
+	}
+	EndPrimitive();
+#else
+	int i;
+	for(i=0; i< 3; i++)
 	{
 		vec4 pos =  explode * POSITION_IN(i) + (1.0-explode)* vec4(center,1.0);
+		ColorFS = ambient;
+		if(lambertTerm > 0.0)
+			ColorFS += vec4(colorVertex[i],1.0) * lambertTerm;
 		gl_Position = ModelViewProjectionMatrix *  pos;
-			
 		EmitVertex();
 	}
 	EndPrimitive();
+#endif
+
 }