80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
#ifndef slic3r_Frustum_hpp_
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#define slic3r_Frustum_hpp_
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#include "Point.hpp"
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#include "BoundingBox.hpp"
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namespace Slic3r {
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class Frustum
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{
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public:
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Frustum()=default;
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~Frustum() = default;
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class Plane {
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public:
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enum PlaneIntersects { Intersects_Cross = 0, Intersects_Tangent = 1, Intersects_Front = 2, Intersects_Back = 3 };
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void set(const Vec3f &n, const Vec3f &pt)
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{
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normal_ = n.normalized();
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center_ = pt;
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d_ = -normal_.dot(pt);
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}
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float distance(const Vec3f &pt) const { return normal_.dot(pt) + d_; }
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inline const Vec3f &getNormal() const { return normal_; }
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const Vec3f & getCenter() const { return center_; }
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Plane::PlaneIntersects intersects(const BoundingBoxf3 &box) const;
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//// check intersect with point (world space)
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Plane::PlaneIntersects intersects(const Vec3f &p0) const;
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// check intersect with line segment (world space)
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Plane::PlaneIntersects intersects(const Vec3f &p0, const Vec3f &p1) const;
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// check intersect with triangle (world space)
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Plane::PlaneIntersects intersects(const Vec3f &p0, const Vec3f &p1, const Vec3f &p2) const;
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private:
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Vec3f normal_;
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Vec3f center_;
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float d_ = 0;
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};
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bool intersects(const BoundingBoxf3 &box, bool is_perspective) const;
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// check intersect with point (world space)
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bool intersects(const Vec3f &p0) const;
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// check intersect with line segment (world space)
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bool intersects(const Vec3f &p0, const Vec3f &p1) const;
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// check intersect with triangle (world space)
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bool intersects(const Vec3f &p0, const Vec3f &p1, const Vec3f &p2) const;
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Plane planes[6];
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/* corners[0]: nearTopLeft;
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* corners[1]: nearTopRight;
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* corners[2]: nearBottomLeft;
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* corners[3]: nearBottomRight;
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* corners[4]: farTopLeft;
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* corners[5]: farTopRight;
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* corners[6]: farBottomLeft;
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* corners[7]: farBottomRight;
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*/
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Vec3f corners[8];
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BoundingBoxf3 bbox;
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};
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enum FrustumClipMask {
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POSITIVE_X = 1 << 0,
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NEGATIVE_X = 1 << 1,
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POSITIVE_Y = 1 << 2,
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NEGATIVE_Y = 1 << 3,
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POSITIVE_Z = 1 << 4,
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NEGATIVE_Z = 1 << 5,
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};
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const int FrustumClipMaskArray[6] = {
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FrustumClipMask::POSITIVE_X, FrustumClipMask::NEGATIVE_X, FrustumClipMask::POSITIVE_Y, FrustumClipMask::NEGATIVE_Y, FrustumClipMask::POSITIVE_Z, FrustumClipMask::NEGATIVE_Z,
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};
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const Vec4f FrustumClipPlane[6] = {{-1, 0, 0, 1}, {1, 0, 0, 1}, {0, -1, 0, 1}, {0, 1, 0, 1}, {0, 0, -1, 1}, {0, 0, 1, 1}};
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}
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#endif
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