cube-game-plus-plus/client/math/Plane.cpp

#include "client/math/Plane.h"

Plane::Plane() : d(0) {
}

void Plane::set(const Vector3& va, const Vector3& vb, const Vector3& vc) {
    Vector3 h1 = vb - va;
    Vector3 h2 = vc - va;
    abc = h1.cross(h2);
    abc.normalize();
    d = -h1.dot(va);
}

float Plane::getSignedDistance(const Vector3& v) const {
    return abc.dot(v) + d;
}