/*
===========================================================================

Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").  

Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Doom 3 BFG Edition Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Doom 3 BFG Edition Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#include "global.inc"

uniform float4 rpUser0 : register( c128 ); //rpCenterScaleTex
uniform float4 rpUser1 : register( c129 ); //rpRotateTex
uniform float4 rpUser2 : register( c130 ); //rpColorFactor

struct VS_IN {
	float4 position : POSITION;
	float2 texcoord : TEXCOORD0;
	float4 normal : NORMAL;
	float4 tangent : TANGENT;
	float4 color : COLOR0;
};

struct VS_OUT {
	float4 position : POSITION;
	float2 texcoord0 : TEXCOORD0;
	float2 texcoord1 : TEXCOORD1;
	float2 texcoord2 : TEXCOORD2;
	float2 texcoord3 : TEXCOORD3;
	float2 texcoord4 : TEXCOORD4;
};

void main( VS_IN vertex, out VS_OUT result ) {
	result.position.x = dot4( vertex.position, rpMVPmatrixX );
	result.position.y = dot4( vertex.position, rpMVPmatrixY );
	result.position.z = dot4( vertex.position, rpMVPmatrixZ );
	result.position.w = dot4( vertex.position, rpMVPmatrixW );

	//_accum 1
	const float4 centerScaleTex = rpUser0;
	const float4 rotateTex = rpUser1;
	float2 tc0 = CenterScale( vertex.texcoord, centerScaleTex.xy );
	result.texcoord0 = Rotate2D( tc0, rotateTex.xy );

	// accum 2
	result.texcoord1 = Rotate2D( tc0, float2( rotateTex.z, -rotateTex.w ) );

	// accum 3
	result.texcoord2 = Rotate2D( tc0, rotateTex.zw );

	// pass through for currentrender
	result.texcoord3 = vertex.texcoord;

	// pass through the color fator
	const float4 colorFactor = rpUser2;
	result.texcoord4 = colorFactor.xx;
}