#include "common_vs_fxc.h"

float2 screenSize;
float viewAspect;
float tanHalfFov;

struct VS_INPUT
{
    float4 position : POSITION0;
};

struct VS_OUTPUT
{
    float4 position : POSITION0;
    float2 texCoord : TEXCOORD0;
    float3 cameraEye : TEXCOORD1;
};

VS_OUTPUT main( const VS_INPUT v )
{
	VS_OUTPUT o = ( VS_OUTPUT )0;

    o.position = v.position;
    o.texCoord = v.position.xy * float2(0.5, -0.5) + float2(0.5, 0.5) + 0.5 / screenSize;
    o.cameraEye = float3(v.position.x * tanHalfFov * viewAspect, v.position.y * tanHalfFov, 1);

	return o;
}