// ---------------------------------------------------------------------------
//  Project:  NintendoWare
//  File:     CalcHemiSphereLighting.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        半球ライティングを計算し TEMP_COLO に結果を加えます。
//-----------------------------------------------------------------------------
l_calc_hemisphere_lighting:
    dp3     TEMP1,      TEMP_NORM,                  nw_hemi_sphere_direction._XYZW
    mov     TEMP2,      nw_hemi_sphere_direction._W
    mad     TEMP1,      TEMP1,                      TEMP2,         TEMP2
    mov     TEMP3,      nw_hemi_sphere_ground._XYZW
    sub     TEMP2,      nw_hemi_sphere_sky._XYZW,         TEMP3
    mad     TEMP4,      TEMP2,                      TEMP1,         TEMP3
    ifb     nw_is_hemi_sphere_occlusion
        mul     TEMP4,  TEMP4,  TEMP_COLO.wwww
    endif
    mad     TEMP_COLO.xyz,     TEMP4,     nw_material_diffuse._XYZW,     TEMP_COLO
    mov     TEMP_STUS.x,        CONST_1
    ret