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Updated all the libs, added citro3d, added ctr.swkbd (WIP, untested)

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Firew0lf 2016-08-05 17:30:24 +02:00
parent 68a44645f7
commit 49c87e5526
97 changed files with 7341 additions and 944 deletions
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46
libs/citro3d/source/maths/mtx_persptilt.c Normal file
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#include <c3d/maths.h>
void Mtx_PerspTilt(C3D_Mtx* mtx, float fovx, float invaspect, float near, float far, bool isLeftHanded)
{
// Notes:
// We are passed "fovy" and the "aspect ratio". However, the 3DS screens are sideways,
// and so are these parameters -- in fact, they are actually the fovx and the inverse
// of the aspect ratio. Therefore the formula for the perspective projection matrix
// had to be modified to be expressed in these terms instead.
// Notes:
// Includes adjusting depth range from [-1,1] to [-1,0]
// Includes rotation of the matrix one quarter of a turn clockwise in order to fix the 3DS screens' orientation
// Notes:
// fovx = 2 atan(tan(fovy/2)*w/h)
// fovy = 2 atan(tan(fovx/2)*h/w)
// invaspect = h/w
// a0,0 = h / (w*tan(fovy/2)) =
// = h / (w*tan(2 atan(tan(fovx/2)*h/w) / 2)) =
// = h / (w*tan( atan(tan(fovx/2)*h/w) )) =
// = h / (w * tan(fovx/2)*h/w) =
// = 1 / tan(fovx/2)
// a1,1 = 1 / tan(fovy/2) = (...) = w / (h*tan(fovx/2))
float fovx_tan = tanf(fovx/2.0f);
Mtx_Zeros(mtx);
mtx->r[0].y = 1.0f / fovx_tan;
mtx->r[1].x = -1.0f / (fovx_tan*invaspect);
mtx->r[2].w = far*near / (near - far);
if (isLeftHanded)
{
mtx->r[2].z = 0.5f*(far + near) / (far - near) - 0.5f;
mtx->r[3].z = 1.0f;
}
else
{
mtx->r[2].z = 0.5f*(far + near) / (near - far) + 0.5f;
mtx->r[3].z = -1.0f;
}
}