mirror of https://github.com/axmolengine/axmol.git
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
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#ifndef __CC_FRUSTUM_H__
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#define __CC_FRUSTUM_H__
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#include "CCPlatformMacros.h"
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#include "math/kazmath/include/kazmath/kazmath.h"
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NS_CC_BEGIN
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class ViewTransform
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{
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public:
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ViewTransform();
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~ViewTransform();
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void Init(const kmVec3& pos, const kmVec3& focus, const kmVec3& up);
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const kmVec3& getPosition() const { return _position; }
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const kmVec3& getFocus() const { return _focus; }
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const kmVec3& getDirection() const;
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const kmVec3& getRight() const;
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const kmVec3& getUp() const;
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private:
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void LazyAdjust() const;
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private:
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kmVec3 _position;
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kmVec3 _focus;
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kmVec3 _up;
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mutable bool _dirty;
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mutable kmMat4 _matrix;
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mutable kmVec3 _adjustDir;
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mutable kmVec3 _adjustRight;
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mutable kmVec3 _adjustUp;
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};
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class AABB
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{
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public:
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AABB(const kmVec3& min, const kmVec3& max);
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~AABB();
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kmVec3 getCenter() const;
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float getDimensionX() const;
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float getDimensionY() const;
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float getDimensionZ() const;
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kmVec3 getPositivePoint(const kmVec3& direction) const;
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kmVec3 getNegativePoint(const kmVec3& direction) const;
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const AABB& expand(const kmVec3& point);
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private:
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kmVec3 _min;
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kmVec3 _max;
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};
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class Frustum
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{
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public:
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enum class IntersectResult
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{
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OUTSIDE = 0,
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INTERSECT = 1,
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INSIDE = 2
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};
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public:
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Frustum();
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~Frustum();
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void setupProjectionOrthogonal(const ViewTransform& view, float width, float height, float near, float far);
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void setupProjectionPerspective(const ViewTransform& view, float left, float right, float top, float bottom, float near, float far);
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void setupProjectionPerspectiveFov(const ViewTransform& view, float fov, float ratio, float near, float far);
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void setupFromMatrix(const kmMat4& view, const kmMat4& projection);
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IntersectResult intersectPoint(const kmVec3& point) const;
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IntersectResult intersectAABB(const AABB& aabb) const;
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IntersectResult intersectSphere(const kmVec3& center, float radius) const;
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private:
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enum FrustumPlane
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{
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NEAR = 0,
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FAR = 1,
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BOTTOM = 2,
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TOP = 3,
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LEFT = 4,
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RIGHT = 5,
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NUMBER = 6
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};
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kmPlane _frustumPlanes[FrustumPlane::NUMBER];
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};
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NS_CC_END
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#endif
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