// ---------------------------------------------------------------------------
//  Project:  NintendoWare
//  File:     GenTexcoordReflection.vsh
//
//  Copyright (C)2009-2010 Nintendo Co., Ltd.  All rights reserved.
//
//  These coded instructions, statements, and computer programs contain
//  proprietary information of Nintendo of America Inc. and/or Nintendo
//  Company Ltd., and are protected by Federal copyright law.  They may
//  not be disclosed to third parties or copied or duplicated in any form,
//  in whole or in part, without the prior written consent of Nintendo.
//
//  $Revision:$
// ---------------------------------------------------------------------------

#include "ShaderConfig.h"
#include "VertexShader.h"

//-----------------------------------------------------------------------------
// @brief        視点座標系での反射ベクトルを求めて TEMP_TEX に格納します。
//-----------------------------------------------------------------------------
l_gen_texcoord_reflection:
    mov     TEMP2,             -TEMP_POSI
    dp3     TEMP2.w,            TEMP2,          TEMP2
    rsq     TEMP2.w,            TEMP2.w
    mul     TEMP2,              TEMP2,          TEMP2.w
    dp3     TEMP1,              TEMP2,          TEMP_NORM
    add     TEMP1,              TEMP1,          TEMP1
    mad     TEMP_TEX,           TEMP1,          TEMP_NORM,          -TEMP2
    ret