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Added Mtx_Diagonal(). (#27)

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Thompson Lee 2016-09-11 17:40:10 -04:00 committed by fincs
parent b32275ee94
commit 7960e832de
2 changed files with 26 additions and 16 deletions
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32
include/c3d/maths.h
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@ -283,12 +283,6 @@ static inline void Mtx_Copy(C3D_Mtx* out, const C3D_Mtx* in)
*out = *in;
}
/**
* @brief Identity matrix
* @param[out] out Matrix to fill
*/
void Mtx_Identity(C3D_Mtx* out);
/**
* @brief Multiply two matrices
* @param[out] out Output matrix
@ -495,6 +489,32 @@ void Mtx_LookAt(C3D_Mtx* out, C3D_FVec cameraPosition, C3D_FVec cameraTarget, C3
*@param[in,out] out Output matrix.
*/
void Mtx_Transpose(C3D_Mtx* out);
/**
* @brief Creates a matrix with the diagonal using the given parameters.
* @param[out] out Output matrix.
* @param[in] x The X component.
* @param[in] y The Y component.
* @param[in] z The Z component.
* @param[in] w The W component.
*/
static inline void Mtx_Diagonal(C3D_Mtx* out, float x, float y, float z, float w)
{
Mtx_Zeros(out);
out->r[0].x = x;
out->r[1].y = y;
out->r[2].z = z;
out->r[3].w = w;
}
/**
* @brief Identity matrix
* @param[out] out Matrix to fill
*/
static inline void Mtx_Identity(C3D_Mtx* out)
{
Mtx_Diagonal(out, 1.0f, 1.0f, 1.0f, 1.0f);
}
///@}
///@name Quaternion Math

10
source/maths/mtx_identity.c
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@ -1,10 +0,0 @@
#include <c3d/maths.h>
void Mtx_Identity(C3D_Mtx* out)
{
// http://www.wolframalpha.com/input/?i={{1,0,0,0},{0,1,0,0},{0,0,1,0},{0,0,0,1}}
int i;
for (i = 0; i < 16; ++i)
out->m[i] = 0.0f;
out->r[0].x = out->r[1].y = out->r[2].z = out->r[3].w = 1.0f;
}