precision highp float;
precision mediump float;


uniform mat4 u_mat4_ads;

varying vec3 vEyeNormal;
varying vec3 vPosition3;

void main()
{
	vec4 amb = u_mat4_ads[0];//vec4 (0.0, 0.0, 0.0, 1.0);
	vec4 diff = u_mat4_ads[1];//vec4 (1.0, 1.0, 1.0, 1.0);
	vec4 spcl = u_mat4_ads[2];//vec4 (1.0, 1.0, 1.0, 1.0);
	vec3 lpos = u_mat4_ads[3].xyz;//vec3(-10.0, 10.0, 10.0);
	
	vec3 vLightDir = normalize(lpos - vPosition3);

	float tdiff = max(0.0, dot(vEyeNormal, vLightDir));

	vec4 v_v4_clr = tdiff * diff;

	v_v4_clr += amb;
	vec3 vReflection = normalize(reflect(-vLightDir, vEyeNormal));
	float spec = max(0.0, dot(vEyeNormal, vReflection));
	
	float fSpec = pow(spec, 128.0);
	v_v4_clr.rgb += vec3(fSpec, fSpec, fSpec);
	
	v_v4_clr.rgba *= u_mat4_ads[3].w;
	
	gl_FragColor = v_v4_clr;
}