42 lines
835 B
C
42 lines
835 B
C
#include <BH/Math.h>
|
|
#include <string.h>
|
|
|
|
|
|
#define EPSILON 0.00001f
|
|
#define PI 3.14159265358979323846f
|
|
|
|
|
|
int BH_LineFromPoints(const float *a,
|
|
const float *b,
|
|
float *out)
|
|
{
|
|
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,
|
|
const float *point)
|
|
{
|
|
return BH_Vec2fDot(line, point) - line[2];
|
|
}
|
|
|
|
|
|
void BH_LineClosestPoint(const float *line,
|
|
const float *point,
|
|
float *out)
|
|
{
|
|
float tmp[2];
|
|
|
|
BH_Vec2fScale(line, BH_LineDistance(line, point), tmp);
|
|
BH_Vec2fSub(point, tmp, out);
|
|
}
|