float4x4 WorldViewProj : WorldViewProjection;
float4x4 World : World;
float3 CameraPos : CameraPosition;

texture m_texture : DIFFUSE;

sampler texSampler = sampler_state
{
	Texture = <m_texture>;
	FILTER = MIN_MAG_MIP_LINEAR;
};

float4 diffuseColor
<
	string UIName = "Diffuse Color";
	string UIWidget = "Color";
> = (1,1,1,1);

float4 ambientColor
<
	string UIName = "Ambient Color";
	string UIWidget = "Color";
> = (1,1,1,1);

float3 Lamp0Pos : POSITION
<
	string Object = "DirectionalLight0";
	string UIName = "Directional Light";
	string Space = "World";
> = (0,0,0);

float phongExp
<
	string UIName= "PhongExponent";
> = (1);

struct VertexInput
{
	float4 pos : POSITION;
	float2 uvCor : TEXCOORD0;
	float4 nor : NORMAL;
};

struct VertexOutput
{
	float4 pos : POSITION;
	float2 uvCor : TEXCOORD0;
	float4 lightColor : COLOR0;
};

VertexOutput mainVS(VertexInput IN)
{
	VertexOutput vOUT = (VertexOutput) 0;
	vOUT.pos = mul(float4(IN.pos.xyz, 1.0), WorldViewProj);
	vOUT.uvCor = IN.uvCor;

	float4 worldPos = mul(IN.pos, World);
	float4 worldNor = mul(IN.nor, World);

	//Specular
	float3 reflectedLight = normalize(reflect((Lamp0Pos-worldPos), worldNor));
	float3 viewVec = normalize(CameraPos-worldPos);
	float specIntensity = pow(clamp(dot(reflectedLight, viewVec), 0, 1), phongExp);

	float lightIntensity = max(dot(normalize(Lamp0Pos-worldPos), normalize(worldNor)), 0);

	vOUT.lightColor = lightIntensity * diffuseColor + ambientColor + specIntensity;

	return vOUT;
}

float4 mainPS(VertexOutput IN) : COLOR
{
	return tex2D(texSampler, IN.uvCor) * IN.lightColor;
}

technique technique0
{
	pass p0
	{
		VertexShader = compile vs_3_0 mainVS();
		PixelShader = compile ps_3_0 mainPS();
	}
}