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#pragma once
#include "config/types.h"
#include "ray.h"
#include <glm/geometric.hpp>
#include <glm/gtx/intersect.hpp>
#include <glm/vec3.hpp>
#include <optional>
class GeometricPlane {
public:
enum class PlaneRelation { Above, Below, On };
static bool isIntersect(PlaneRelation a, PlaneRelation b);
};
template<typename PositionType> class GeometricPlaneT : public GeometricPlane {
public:
GeometricPlaneT() = default;
GeometricPlaneT(PositionType origin, Normal3D normal) : origin(std::move(origin)), normal(normal) { }
struct DistAndPosition {
PositionType::value_type dist;
PositionType position;
};
PositionType origin {};
Normal3D normal {};
[[nodiscard]] inline PlaneRelation
getRelation(PositionType point) const
{
const auto d = glm::dot(normal, RelativePosition3D(point - origin));
return d < 0.F ? PlaneRelation::Below : d > 0.F ? PlaneRelation::Above : PlaneRelation::On;
}
[[nodiscard]] inline std::optional<DistAndPosition>
getRayIntersectPosition(const Ray<PositionType> & 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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