void EdgeVP(
		float4 position		: POSITION,
		float4 normal		: NORMAL0,
		out float4 oPos		: POSITION,
		out float4 oColor	: COLOR,
		uniform float4 edgeColor,
		uniform float4 eyePosition,
		uniform float sinkScale,
		uniform float edgeScale,
		uniform float4x4 worldViewProj )
{
	float4 E = normalize(eyePosition);
	position = mul(worldViewProj, position - sinkScale*E);

	normal.w = 0;
	normal = normalize(mul(worldViewProj, normal));

	position += ((sinkScale/8.0f)+1.0) * edgeScale * float4(normal.xy, 0, 0);

	oPos=position;
	oColor=edgeColor;
}