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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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23
libs/citro3d/source/maths/quat_pow.c Normal file
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#include <float.h>
#include <c3d/maths.h>
C3D_FQuat Quat_Pow(C3D_FQuat q, float p)
{
// if the power is very near to zero, return the identity quaternion to avoid blowing up with division
if (p > -FLT_EPSILON && p < FLT_EPSILON)
return Quat_Identity();
float mag = FVec4_Magnitude(q);
// if the magnitude is very near to one, this is equivalent to raising the real component by the power
// also, acosf(1) == 0 and sinf(0) == 0 so you would get a divide-by-zero anyway
if (fabsf(q.r / mag) > 1.0f - FLT_EPSILON && fabsf(q.r / mag) < 1.0f + FLT_EPSILON)
return Quat_New(0.0f, 0.0f, 0.0f, powf(q.r, p));
float angle = acosf(q.r / mag);
float newAngle = angle * p;
float div = sinf(newAngle) / sinf(angle);
float Mag = powf(mag, p - 1.0f);
return Quat_New(q.i*div*Mag, q.j*div*Mag, q.k*div*Mag, cosf(newAngle)*mag*Mag);
}