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#include "geometricPlane.h"
#include "ray.hpp"
#include <glm/geometric.hpp>
#include <glm/gtx/intersect.hpp>
GeometricPlane::PlaneRelation
GeometricPlane::getRelation(glm::vec3 p) const
{
const auto d = glm::dot(normal, p - origin);
return d < 0.f ? PlaneRelation::Below : d > 0.f ? PlaneRelation::Above : PlaneRelation::On;
}
bool
GeometricPlane::isIntersect(PlaneRelation a, PlaneRelation b)
{
return ((a == PlaneRelation::Above && b == PlaneRelation::Below)
|| (a == PlaneRelation::Below && b == PlaneRelation::Above));
}
std::optional<GeometricPlane::DistAndPosition>
GeometricPlane::getRayIntersectPosition(const Ray & ray) const
{
float dist {};
if (!glm::intersectRayPlane(ray.start, ray.direction, origin, normal, dist)) {
return {};
}
return DistAndPosition {dist, ray.start + (ray.direction * dist)};
}
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