void button_vsAmbGEN0(float4 position	: POSITION,
	float3 normal : NORMAL,
	float2 uv0 : TEXCOORD0,
	out float4 oPos: POSITION,
	out float2 oUv0 : TEXCOORD0,
	uniform float4x4 wvpMat
)
{
	oPos = mul(wvpMat, position);
	oUv0 = uv0;
}

float4 button_fpAmbGENDIFF0(float4 position	: POSITION,
	float2 uv0 : TEXCOORD0,
	uniform float3 ambient,
	uniform float4 matAmb,
	uniform float4 matEmissive,
	uniform sampler2D diffuseMap : register(s0)): COLOR0
{
	float4 diffuseTex = tex2D(diffuseMap, uv0);
	float4 retColor = max(matEmissive, float4(ambient, 1) * matAmb);
	retColor *= diffuseTex;
	return retColor;
}

void button_vsLightGEN0(float4 position	: POSITION,
	float3 normal : NORMAL,
	float2 uv0 : TEXCOORD0,
	out float4 oPos : POSITION,
	out float3 oNorm : TEXCOORD0,
	out float3 oSpDir : TEXCOORD1,
	out float4 oWp : TEXCOORD2,
	out float2 oUv0 : TEXCOORD3,
	uniform float4x4 wMat,
	uniform float4x4 witMat,
	uniform float4x4 wvpMat,
	uniform float4 spotlightDir)
{
	oWp = mul(wMat, position);
	oPos = mul(wvpMat, position);
	oUv0 = uv0;
	oNorm = normalize(mul((float3x3)witMat, normal));
	oSpDir = mul(wMat, spotlightDir).xyz;
}

float4 button_fpLightGENDIFF0(float4 position	: POSITION,
	float3 norm : TEXCOORD0,
	float3 spDir : TEXCOORD1,
	float4 wp : TEXCOORD2,
	float2 uv0 : TEXCOORD3,
	uniform float3 lightDif0,
	uniform float4 lightPos0,
	uniform float4 lightAtt0,
	uniform float3 lightSpec0,
	uniform float4 matDif,
	uniform float4 matSpec,
	uniform float matShininess,
	uniform float3 camPos,
	uniform float4 invSMSize,
	uniform float4 spotlightParams,
	uniform sampler2D diffuseMap : register(s0)): COLOR0
{
	float3 ld0 = normalize(lightPos0.xyz - (lightPos0.w * wp.xyz));
	// attenuation
	half lightDist = length(lightPos0.xyz - wp.xyz) / (lightAtt0.r / lightAtt0.r);
	half la = 1;
	if(lightAtt0.a > 0.0)
	{
		half ila = lightDist * lightDist; // quadratic falloff
		la = 1.0 / (lightAtt0.g + lightAtt0.b * lightDist + lightAtt0.a * ila);
	}
	float3 normal = normalize(norm);
	float3 diffuse = max(dot(normal, ld0), 0);
	// calculate the spotlight effect
	float spot = (spotlightParams.x == 1 && spotlightParams.y == 0 && spotlightParams.z == 0 && spotlightParams.w == 1 ? 1 : // if so, then it's not a spot light
	   saturate((dot(normalize(-spDir), ld0) - spotlightParams.y) / (spotlightParams.x - spotlightParams.y)));
	float3 camDir = normalize(camPos - wp.xyz);
	float3 halfVec = normalize(ld0 + camDir);
	float3 specular = pow(max(dot(normal, halfVec), 0), matShininess);
	float4 diffuseTex = tex2D(diffuseMap, uv0);
	float3 diffuseContrib = diffuse * lightDif0 * matDif.rgb;
	diffuseContrib *= diffuseTex.rgb;
	float3 specularContrib = specular * lightSpec0 * matSpec.rgb;
	float3 light0C = (diffuseContrib + specularContrib) * la * spot;
	float alpha = matDif.a;
	alpha *= diffuseTex.a;
	return float4(light0C, alpha);
}