primitives.h

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// SPDX-License-Identifier: Apache-2.0
// Copyright 2025-2026 Arnis Lektauers
//
// Created by Arnis Lektauers on 21.07.2025.
//
 
#pragma once
 
#include <numbers>
 
#include "matrix4.h"
#include "vector3.h"
 
namespace visutwin::canvas
{
    /*
     * A sphere primitive, representing the set of all points some distance from the origin
     */
    struct Sphere
    {
        float radius;
    };
 
    struct Frustum
    {
        Vector4 planes[6];
 
        void create(const Matrix4& viewProjection);
 
        [[nodiscard]] bool checkPoint(const Vector3&) const;
        [[nodiscard]] bool checkSphere(const Vector3&, float) const;
 
        enum class Intersect
        {
            Outside,
            Intersects,
            Inside,
        };
        //Intersect checkBox(const AABB& box) const;
        //bool checkBoxFast(const AABB& box) const;
 
        [[nodiscard]] const Vector4& getNearPlane() const { return planes[0]; };
        [[nodiscard]] const Vector4& getFarPlane() const { return planes[1]; };
        [[nodiscard]] const Vector4& getLeftPlane() const { return planes[2]; };
        [[nodiscard]] const Vector4& getRightPlane() const { return planes[3]; };
        [[nodiscard]] const Vector4& getTopPlane() const { return planes[4]; };
        [[nodiscard]] const Vector4& getBottomPlane() const { return planes[5]; };
    };
}