Atlas - SDL_d3dmath.h
Home / ext / SDL / src / render
Lines: 1 | Size: 5121 bytes
[Download] [Show on GitHub] [Search similar files] [Raw] [Raw (proxy)] 
[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21#include "SDL_internal.h"
22
23#if defined(SDL_VIDEO_RENDER_D3D) || \
24    defined(SDL_VIDEO_RENDER_D3D11) || \
25    defined(SDL_VIDEO_RENDER_D3D12) || \
26    defined(SDL_VIDEO_RENDER_GPU) || \
27    defined(SDL_VIDEO_RENDER_VULKAN)
28
29// Set up for C function definitions, even when using C++
30#ifdef __cplusplus
31extern "C" {
32#endif
33
34// Direct3D matrix math functions
35
36typedef struct
37{
38    float x;
39    float y;
40} Float2;
41
42typedef struct
43{
44    float x;
45    float y;
46    float z;
47} Float3;
48
49typedef struct
50{
51    float x;
52    float y;
53    float z;
54    float w;
55} Float4;
56
57typedef struct
58{
59    union
60    {
61        struct
62        {
63            float _11, _12, _13, _14;
64            float _21, _22, _23, _24;
65            float _31, _32, _33, _34;
66            float _41, _42, _43, _44;
67        } v;
68        float m[4][4];
69    };
70} Float4X4;
71
72static inline Float4X4 MatrixIdentity(void)
73{
74    Float4X4 m;
75    SDL_zero(m);
76    m.v._11 = 1.0f;
77    m.v._22 = 1.0f;
78    m.v._33 = 1.0f;
79    m.v._44 = 1.0f;
80    return m;
81}
82
83static inline Float4X4 MatrixMultiply(Float4X4 M1, Float4X4 M2)
84{
85    Float4X4 m;
86    m.v._11 = M1.v._11 * M2.v._11 + M1.v._12 * M2.v._21 + M1.v._13 * M2.v._31 + M1.v._14 * M2.v._41;
87    m.v._12 = M1.v._11 * M2.v._12 + M1.v._12 * M2.v._22 + M1.v._13 * M2.v._32 + M1.v._14 * M2.v._42;
88    m.v._13 = M1.v._11 * M2.v._13 + M1.v._12 * M2.v._23 + M1.v._13 * M2.v._33 + M1.v._14 * M2.v._43;
89    m.v._14 = M1.v._11 * M2.v._14 + M1.v._12 * M2.v._24 + M1.v._13 * M2.v._34 + M1.v._14 * M2.v._44;
90    m.v._21 = M1.v._21 * M2.v._11 + M1.v._22 * M2.v._21 + M1.v._23 * M2.v._31 + M1.v._24 * M2.v._41;
91    m.v._22 = M1.v._21 * M2.v._12 + M1.v._22 * M2.v._22 + M1.v._23 * M2.v._32 + M1.v._24 * M2.v._42;
92    m.v._23 = M1.v._21 * M2.v._13 + M1.v._22 * M2.v._23 + M1.v._23 * M2.v._33 + M1.v._24 * M2.v._43;
93    m.v._24 = M1.v._21 * M2.v._14 + M1.v._22 * M2.v._24 + M1.v._23 * M2.v._34 + M1.v._24 * M2.v._44;
94    m.v._31 = M1.v._31 * M2.v._11 + M1.v._32 * M2.v._21 + M1.v._33 * M2.v._31 + M1.v._34 * M2.v._41;
95    m.v._32 = M1.v._31 * M2.v._12 + M1.v._32 * M2.v._22 + M1.v._33 * M2.v._32 + M1.v._34 * M2.v._42;
96    m.v._33 = M1.v._31 * M2.v._13 + M1.v._32 * M2.v._23 + M1.v._33 * M2.v._33 + M1.v._34 * M2.v._43;
97    m.v._34 = M1.v._31 * M2.v._14 + M1.v._32 * M2.v._24 + M1.v._33 * M2.v._34 + M1.v._34 * M2.v._44;
98    m.v._41 = M1.v._41 * M2.v._11 + M1.v._42 * M2.v._21 + M1.v._43 * M2.v._31 + M1.v._44 * M2.v._41;
99    m.v._42 = M1.v._41 * M2.v._12 + M1.v._42 * M2.v._22 + M1.v._43 * M2.v._32 + M1.v._44 * M2.v._42;
100    m.v._43 = M1.v._41 * M2.v._13 + M1.v._42 * M2.v._23 + M1.v._43 * M2.v._33 + M1.v._44 * M2.v._43;
101    m.v._44 = M1.v._41 * M2.v._14 + M1.v._42 * M2.v._24 + M1.v._43 * M2.v._34 + M1.v._44 * M2.v._44;
102    return m;
103}
104
105static inline Float4X4 MatrixScaling(float x, float y, float z)
106{
107    Float4X4 m;
108    SDL_zero(m);
109    m.v._11 = x;
110    m.v._22 = y;
111    m.v._33 = z;
112    m.v._44 = 1.0f;
113    return m;
114}
115
116static inline Float4X4 MatrixTranslation(float x, float y, float z)
117{
118    Float4X4 m;
119    SDL_zero(m);
120    m.v._11 = 1.0f;
121    m.v._22 = 1.0f;
122    m.v._33 = 1.0f;
123    m.v._44 = 1.0f;
124    m.v._41 = x;
125    m.v._42 = y;
126    m.v._43 = z;
127    return m;
128}
129
130static inline Float4X4 MatrixRotationX(float r)
131{
132    float sinR = SDL_sinf(r);
133    float cosR = SDL_cosf(r);
134    Float4X4 m;
135    SDL_zero(m);
136    m.v._11 = 1.0f;
137    m.v._22 = cosR;
138    m.v._23 = sinR;
139    m.v._32 = -sinR;
140    m.v._33 = cosR;
141    m.v._44 = 1.0f;
142    return m;
143}
144
145static inline Float4X4 MatrixRotationY(float r)
146{
147    float sinR = SDL_sinf(r);
148    float cosR = SDL_cosf(r);
149    Float4X4 m;
150    SDL_zero(m);
151    m.v._11 = cosR;
152    m.v._13 = -sinR;
153    m.v._22 = 1.0f;
154    m.v._31 = sinR;
155    m.v._33 = cosR;
156    m.v._44 = 1.0f;
157    return m;
158}
159
160static inline Float4X4 MatrixRotationZ(float r)
161{
162    float sinR = SDL_sinf(r);
163    float cosR = SDL_cosf(r);
164    Float4X4 m;
165    SDL_zero(m);
166    m.v._11 = cosR;
167    m.v._12 = sinR;
168    m.v._21 = -sinR;
169    m.v._22 = cosR;
170    m.v._33 = 1.0f;
171    m.v._44 = 1.0f;
172    return m;
173}
174
175// Ends C function definitions when using C++
176#ifdef __cplusplus
177}
178#endif
179
180#endif // SDL_VIDEO_RENDER_D3D || SDL_VIDEO_RENDER_D3D11 || SDL_VIDEO_RENDER_D3D12 || SDL_VIDEO_RENDER_VULKAN
181
[FILE END]
(C) 2025 0x4248
(C) 2025 4248 Media and 4248 Systems, All part of 0x4248
See LICENCE files for more information. Not all files are by 0x4248 always check Licencing.