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#include <BH/Math/Line.h>
#include <BH/Math/Vec2f.h>
#include <string.h>
#define EPSILON 0.00001f
#define PI 3.14159265358979323846f
int BH_LineFromPoints(const float a[2],
const float b[2],
float out[3])
{
float tmp[2];
tmp[0] = a[1] - b[1];
tmp[1] = b[0] - a[0];
if (BH_Vec2fNormalEx(tmp, tmp) < EPSILON)
return BH_ERROR;
out[2] = BH_Vec2fDot(tmp, a);
memcpy(out, tmp, sizeof(tmp));
return BH_OK;
}
float BH_LineDistance(const float line[3],
const float point[2])
{
return BH_Vec2fDot(line, point) - line[2];
}
void BH_LineClosestPoint(const float line[3],
const float point[2],
float out[2])
{
float tmp[2];
BH_Vec2fScale(line, BH_LineDistance(line, point), tmp);
BH_Vec2fSub(point, tmp, out);
}
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