void HemisphericLighting_VP(
	float4 inPosition		: POSITION,
	float4 inNormal			: NORMAL,
	float4 inTex			: TEXCOORD0,
	
	uniform float4x4 worldviewproj,
	uniform float4 skyColor,
	uniform float4 groundColor,
	
	out float4 outPos		: POSITION,
	out float4 outDiff		: TEXCOORD0,
	out float2 outTex		: TEXCOORD1)
{
	// Transform the position and output the texture coordinate
	outPos = mul(worldviewproj, inPosition);
	outTex = inTex;
	
	// Determine our blending (sky/ground) factor
	float factor = dot(inNormal, float3(0,-1,0))+1.0/2.0;
	
	// Determine the final lighting color
	outDiff = lerp(skyColor, groundColor, factor);
	outDiff.a = 1.0;
}

void HemisphericLighting_FP(
	float4 inDiff		: TEXCOORD0,
	float2 inTex		: TEXCOORD1,
	
	uniform sampler2D texture,
	
	out float4 outColor	: COLOR)
{
	outColor = inDiff * tex2D(texture, inTex);
}