Added vertex attributes.

assets/shaders/singleDiffuseLight/singleDiffuseLight_frag.glsl

@@ -2,16 +2,9 @@
 precision mediump float;
 #endif
 
-// Light color.
-uniform vec3 u_lightColor;
-// Diffuse surface color.
-uniform vec3 u_diffColor;
-// Specular color.
-uniform vec3 u_specColor;
-// Ambient light color.
-uniform vec3 u_ambColor;
+// Fragment color received from the vertex shader.
+varying vec4 v_color;
 
 void main(){
-	// TODO: Implement per pixel diffuse lighting.
-	gl_FragColor = vec4(u_diffColor, 1.0);
+	gl_FragColor = v_color;
 }