CameraFrustum.h

Go to the documentation of this file.

#pragma once
 
#include "Maths.h"
 
#include <array>
 
class CameraFrustum
{
public:
 
    enum PlaneIndex : uint8_t
    {
        Left,
        Right,
        Bottom,
        Top,
        Near,
        Far,
 
        Count
    };
 
    glm::vec3 mPosition = {};
    glm::vec3 mBasisX = { 1.0f, 0.0f, 0.0f };
    glm::vec3 mBasisY = { 0.0f, 1.0f, 0.0f };
    glm::vec3 mBasisZ = { 0.0f, 0.0f, -1.0f };
 
    float mNearDist = 0.0f;
    float mFarDist = 0.0f;
    float mNearWidth = 0.0f;
    float mNearHeight = 0.0f;
    float mTangent = 0.0f;
    float mAspectRatio = 0.0f;
 
    float mSphereFactorX = 0.0f;
    float mSphereFactorY = 0.0f;
 
    bool mOrtho = false;
 
    std::array<glm::vec4, Count> mPlanes = {};
 
public:
 
    void SetPerspective(float angle, float ratio, float nearDist, float farDist);
    void SetOrthographic(float width, float height, float nearDist, float farDist);
    void SetViewProjection(const glm::mat4& viewProjectionMatrix);
    void SetPosition(glm::vec3 position);
    void SetBasis(glm::vec3 forward, glm::vec3 up, glm::vec3 right);
 
    bool IsPointInFrustum(glm::vec3 p) const;
    bool IsSphereInFrustum(glm::vec3 center, float radius) const;
 
    bool IsPointInFrustumOrtho(glm::vec3 p) const;
    bool IsSphereInFrustumOrtho(glm::vec3 center, float radius) const;
 
    bool IsPointInsidePlanes(glm::vec3 p) const;
    bool IsSphereInsidePlanes(glm::vec3 center, float radius) const;
};