| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "../SDL_internal.h" |
| #include "SDL_stdinc.h" |
| |
| #include "SDL_d3dmath.h" |
| |
| /* Direct3D matrix math functions */ |
| |
| Float4X4 MatrixIdentity() |
| { |
| Float4X4 m; |
| SDL_zero(m); |
| m._11 = 1.0f; |
| m._22 = 1.0f; |
| m._33 = 1.0f; |
| m._44 = 1.0f; |
| return m; |
| } |
| |
| Float4X4 MatrixMultiply(Float4X4 M1, Float4X4 M2) |
| { |
| Float4X4 m; |
| m._11 = M1._11 * M2._11 + M1._12 * M2._21 + M1._13 * M2._31 + M1._14 * M2._41; |
| m._12 = M1._11 * M2._12 + M1._12 * M2._22 + M1._13 * M2._32 + M1._14 * M2._42; |
| m._13 = M1._11 * M2._13 + M1._12 * M2._23 + M1._13 * M2._33 + M1._14 * M2._43; |
| m._14 = M1._11 * M2._14 + M1._12 * M2._24 + M1._13 * M2._34 + M1._14 * M2._44; |
| m._21 = M1._21 * M2._11 + M1._22 * M2._21 + M1._23 * M2._31 + M1._24 * M2._41; |
| m._22 = M1._21 * M2._12 + M1._22 * M2._22 + M1._23 * M2._32 + M1._24 * M2._42; |
| m._23 = M1._21 * M2._13 + M1._22 * M2._23 + M1._23 * M2._33 + M1._24 * M2._43; |
| m._24 = M1._21 * M2._14 + M1._22 * M2._24 + M1._23 * M2._34 + M1._24 * M2._44; |
| m._31 = M1._31 * M2._11 + M1._32 * M2._21 + M1._33 * M2._31 + M1._34 * M2._41; |
| m._32 = M1._31 * M2._12 + M1._32 * M2._22 + M1._33 * M2._32 + M1._34 * M2._42; |
| m._33 = M1._31 * M2._13 + M1._32 * M2._23 + M1._33 * M2._33 + M1._34 * M2._43; |
| m._34 = M1._31 * M2._14 + M1._32 * M2._24 + M1._33 * M2._34 + M1._34 * M2._44; |
| m._41 = M1._41 * M2._11 + M1._42 * M2._21 + M1._43 * M2._31 + M1._44 * M2._41; |
| m._42 = M1._41 * M2._12 + M1._42 * M2._22 + M1._43 * M2._32 + M1._44 * M2._42; |
| m._43 = M1._41 * M2._13 + M1._42 * M2._23 + M1._43 * M2._33 + M1._44 * M2._43; |
| m._44 = M1._41 * M2._14 + M1._42 * M2._24 + M1._43 * M2._34 + M1._44 * M2._44; |
| return m; |
| } |
| |
| Float4X4 MatrixScaling(float x, float y, float z) |
| { |
| Float4X4 m; |
| SDL_zero(m); |
| m._11 = x; |
| m._22 = y; |
| m._33 = z; |
| m._44 = 1.0f; |
| return m; |
| } |
| |
| Float4X4 MatrixTranslation(float x, float y, float z) |
| { |
| Float4X4 m; |
| SDL_zero(m); |
| m._11 = 1.0f; |
| m._22 = 1.0f; |
| m._33 = 1.0f; |
| m._44 = 1.0f; |
| m._41 = x; |
| m._42 = y; |
| m._43 = z; |
| return m; |
| } |
| |
| Float4X4 MatrixRotationX(float r) |
| { |
| float sinR = SDL_sinf(r); |
| float cosR = SDL_cosf(r); |
| Float4X4 m; |
| SDL_zero(m); |
| m._11 = 1.0f; |
| m._22 = cosR; |
| m._23 = sinR; |
| m._32 = -sinR; |
| m._33 = cosR; |
| m._44 = 1.0f; |
| return m; |
| } |
| |
| Float4X4 MatrixRotationY(float r) |
| { |
| float sinR = SDL_sinf(r); |
| float cosR = SDL_cosf(r); |
| Float4X4 m; |
| SDL_zero(m); |
| m._11 = cosR; |
| m._13 = -sinR; |
| m._22 = 1.0f; |
| m._31 = sinR; |
| m._33 = cosR; |
| m._44 = 1.0f; |
| return m; |
| } |
| |
| Float4X4 MatrixRotationZ(float r) |
| { |
| float sinR = SDL_sinf(r); |
| float cosR = SDL_cosf(r); |
| Float4X4 m; |
| SDL_zero(m); |
| m._11 = cosR; |
| m._12 = sinR; |
| m._21 = -sinR; |
| m._22 = cosR; |
| m._33 = 1.0f; |
| m._44 = 1.0f; |
| return m; |
| } |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |