FrustumCull.h

// inspired by http://www.lighthouse3d.com/tutorials/view-frustum-culling/
#pragma once
#include "glm/glm.hpp"
#include "FrustumPlane.h"

class FrustumCull {

public:
    enum Classification { OUTSIDE, INTERSECT, INSIDE };
    
    void setCamInternals(float angle, float ratio, float nearD, float farD);

    void setCamDef(const glm::vec3 &p, const glm::vec3 &l, const glm::vec3 &u);

    Classification pointInFrustum(const glm::vec3 &p) const;

    Classification sphereInFrustum(const glm::vec3 &p, float raio) const;

private:

    FrustumPlane pl[6];

    glm::vec3 ntl, ntr, nbl, nbr, ftl, ftr, fbl, fbr;
    float nearD, farD, ratio, angle, tang;
    float nw, nh, fw, fh;

    enum {
        TOP = 0,
        BOTTOM,
        LEFT,
        RIGHT,
        NEARP,
        FARP
    };

};