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matrix_4x4_ortho - cleanup

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This commit is contained in:
twinaphex 2016-09-09 04:02:41 +02:00
parent 8649852e18
commit 0ceffb87f2
1 changed files with 9 additions and 11 deletions
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20
libretro-common/gfx/math/matrix_4x4.c
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@ -119,20 +119,18 @@ void matrix_4x4_ortho(math_matrix_4x4 *mat,
float bottom, float top,
float znear, float zfar)
{
float tx, ty, tz;
float rl = right - left;
float tb = top - bottom;
float fn = zfar - znear;
matrix_4x4_identity(mat);
tx = -(right + left) / (right - left);
ty = -(top + bottom) / (top - bottom);
tz = -(zfar + znear) / (zfar - znear);
MAT_ELEM_4X4(*mat, 0, 0) = 2.0f / (right - left);
MAT_ELEM_4X4(*mat, 1, 1) = 2.0f / (top - bottom);
MAT_ELEM_4X4(*mat, 2, 2) = -2.0f / (zfar - znear);
MAT_ELEM_4X4(*mat, 0, 3) = tx;
MAT_ELEM_4X4(*mat, 1, 3) = ty;
MAT_ELEM_4X4(*mat, 2, 3) = tz;
MAT_ELEM_4X4(*mat, 0, 0) = 2.0f / rl;
MAT_ELEM_4X4(*mat, 1, 1) = 2.0f / tb;
MAT_ELEM_4X4(*mat, 2, 2) = -2.0f / fn;
MAT_ELEM_4X4(*mat, 0, 3) = -(left + right) / rl;
MAT_ELEM_4X4(*mat, 1, 3) = -(top + bottom) / tb;
MAT_ELEM_4X4(*mat, 2, 3) = -(zfar + znear) / fn;
}
void matrix_4x4_scale(math_matrix_4x4 *out, float x, float y,