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#include <BH/Math.h>
#include <string.h>
#define EPSILON 0.00001f
#define PI 3.14159265358979323846f
int BH_PlaneFromPoints(const float *a,
const float *b,
const float *c,
float *out)
{
float tmp1[3], tmp2[3];
BH_Vec3fSub(b, a, tmp1);
BH_Vec3fSub(c, a, tmp2);
BH_Vec3fCross(tmp2, tmp1, tmp1);
if (BH_Vec3fNormalEx(tmp1, tmp1) < EPSILON)
return BH_ERROR;
out[3] = BH_Vec3fDot(a, tmp1);
memcpy(out, tmp1, sizeof(tmp1));
return BH_OK;
}
float BH_PlaneDistance(const float *plane,
const float *point)
{
return BH_Vec3fDot(plane, point) - plane[3];
}
void BH_PlaneClosestPoint(const float *plane,
const float *point,
float *out)
{
float tmp[3];
BH_Vec3fScale(plane, BH_PlaneDistance(plane, point), tmp);
BH_Vec3fSub(point, tmp, out);
}
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