1// ---------------------------------------------------------------------------
2//  Project:  NintendoWare
3//  File:     UserRenderCommandShader.vsh
4//
5//  Copyright (C)2009-2011 Nintendo Co., Ltd.  All rights reserved.
6//
7//  These coded instructions, statements, and computer programs contain
8//  proprietary information of Nintendo of America Inc. and/or Nintendo
9//  Company Ltd., and are protected by Federal copyright law.  They may
10//  not be disclosed to third parties or copied or duplicated in any form,
11//  in whole or in part, without the prior written consent of Nintendo.
12//
13//  $Revision:$
14// ---------------------------------------------------------------------------
15
16
17// Input registers map
18#define InputPos        v0
19#define InputColor      v1
20#define InputNormal     v2
21
22// Output registers map
23#define OutputPosition         o0
24#define OutputColor            o1
25#define OutputQuaternion       o2
26#define OutputView             o3
27
28// Constant registers map
29#define WRLD_MAT            c8
30#define PROJ_MAT            c86
31#define VIEW_MAT            c90
32
33#define TEMP_VEC1           r10
34#define TEMP_VEC2           r11
35#define TEMP_SRC_Z          r12
36#define TEMP_QUATE          r13
37#define TEMP_POS            r14
38#define TEMP_VIEW           r15
39
40#define ConstVec            c93
41#define ConstZero           ConstVec.xxxx
42#define ConstHalf           ConstVec.yyyy
43#define ConstOne            ConstVec.zzzz
44#define ConstInit           ConstVec.xxxz
45
46// Constant registers
47def     ConstVec,           0.0, 0.5, 1.0, 3.0
48
49// uniform
50#pragma bind_symbol(world,    c8, c10)
51
52// 以下の 2 つのユニフォームは NintendoWare のレジスタ番号と一致させる必要があります
53#pragma bind_symbol(proj,    c86, c89)
54#pragma bind_symbol(view,    c90, c92)
55
56// input
57#pragma bind_symbol(Position.xyz,   v0,v0)
58#pragma bind_symbol(Color.xyzw,     v1,v1)
59#pragma bind_symbol(Normal,         v2,v2)
60
61// output
62#pragma output_map (position,   o0)
63#pragma output_map (color,      o1)
64#pragma output_map (quaternion, o2 )
65#pragma output_map (view,       o3 )
66
67main:
68    mov     TEMP_POS,           ConstInit
69    mov     TEMP_VIEW,          ConstInit
70    mov     TEMP_POS.xyz,       InputPos.xyz
71    m4x3    TEMP_VIEW.xyz,      TEMP_POS,           WRLD_MAT
72    m4x3    TEMP_POS.xyz,       TEMP_VIEW,          VIEW_MAT
73    m4x4    OutputPosition,     TEMP_POS,           PROJ_MAT
74    mov     OutputView,        -TEMP_POS
75
76    m3x3    TEMP_VIEW.xyz,      InputNormal,        WRLD_MAT
77    m3x3    TEMP_SRC_Z.xyz,     TEMP_VIEW.xyz,      VIEW_MAT
78
79    mov     OutputColor,        InputColor
80
81    dp3     r0.x,               TEMP_SRC_Z,      TEMP_SRC_Z
82    rsq     r0.x,               r0.x
83    mul     TEMP_SRC_Z.xyz,     TEMP_SRC_Z.xyz,  r0.x
84
85    mov     TEMP_QUATE,         ConstZero
86    cmp     0,   0,             TEMP_SRC_Z.z,      -ConstOne        // z == -1.0
87    ifc 0, 1, 2
88        add     TEMP_VEC1,      TEMP_SRC_Z.z,       ConstOne        // normal.z + 1.0
89        mul     TEMP_VEC1,      TEMP_VEC1,          ConstHalf       // 0.5 * (normal.z + 1.0)
90        rsq     TEMP_VEC1,      TEMP_VEC1.z                         // 1 / sqrt(0.5*(normal.z + 1.0))
91        mul     TEMP_VEC2.xy,   TEMP_SRC_Z,         ConstHalf       // 0.5 * normal
92        rcp     TEMP_QUATE.z,   TEMP_VEC1.z                         // sqrt(0.5*(normal.z + 1.0))
93        mul     TEMP_QUATE.xy,  TEMP_VEC2.xy,       TEMP_VEC1.x     // 0.5*normal / quaternion.z （クォータニオンからの展開時にきちんと、nrm = (mtx.31, mtx.32, mtx33) になる）
94    else
95        mov     TEMP_QUATE.x,   ConstOne                            // これで展開時に 0, 0, -1 になる
96    endif
97
98    mov    OutputQuaternion,       TEMP_QUATE
99    end
100endmain:
101