105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// NoesisGUI - http://www.noesisengine.com
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// Copyright (c) 2013 Noesis Technologies S.L. All Rights Reserved.
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////////////////////////////////////////////////////////////////////////////////////////////////////
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#ifndef __MATH_AABBOX_H__
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#define __MATH_AABBOX_H__
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#include <NsCore/Noesis.h>
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#include <NsMath/Vector.h>
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#include <NsMath/Transform.h>
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namespace Noesis
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{
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////////////////////////////////////////////////////////////////////////////////////////////////////
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/// 2D Axis Aligned Bounding Box
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////////////////////////////////////////////////////////////////////////////////////////////////////
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class AABBox2
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{
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public:
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/// Constructors
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AABBox2();
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AABBox2(const AABBox2& v) = default;
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AABBox2(float minX, float minY, float maxX, float maxY);
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AABBox2(const Vector2& min, const Vector2& max);
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AABBox2(const Vector2& center, float halfSide);
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// Copy operator
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AABBox2& operator=(const AABBox2& box) = default;
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/// Resets to empty bounding box
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void Reset();
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/// Returns ith corner point
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/// X Y
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/// [0] : (min,min)
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/// [1] : (max,min)
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/// [2] : (min,max)
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/// [3] : (max,max)
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Vector2 operator[](uint32_t i) const;
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/// Returns the minimal extents of the box
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Vector2& Min();
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const Vector2& Min() const;
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/// Returns the maximal extents of the box
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Vector2& Max();
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const Vector2& Max() const;
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/// Returns the center position of the box
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Vector2 Center() const;
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/// Returns the diagonal vector of the box
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inline Vector2 Diagonal() const;
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/// Expands bounding box to fit a given box
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AABBox2& operator+=(const AABBox2& box);
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/// Expands bounding box to fit the given point
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AABBox2& operator+=(const Vector2& point);
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/// Scales the box. The origin of the scale if the center of the box.
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AABBox2& Scale(float s);
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/// Logic operators
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bool operator==(const AABBox2& box) const;
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bool operator!=(const AABBox2& box) const;
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/// Checks if the bounding box is empty
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bool Empty() const;
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private:
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Vector2 mMin, mMax;
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};
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/// Operators
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const AABBox2 operator+(const AABBox2& box0, const AABBox2& box1);
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const AABBox2 operator+(const AABBox2& box, const Vector2& point);
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const AABBox2 operator+(const Vector2& point, const AABBox2& box);
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const AABBox2 operator*(const AABBox2& box, const Transform2& mtx);
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const AABBox2 operator*(const AABBox2& box, float s);
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const AABBox2 operator*(float s, const AABBox2& box);
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/// Checks if specified point is inside the bounding box
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bool Inside(const AABBox2& box, const Vector2& p);
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/// Checks if b0 is fully inside b1
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bool BoxInside(const AABBox2& b0, const AABBox2& b1);
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/// Checks if given bounding boxes overlap
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bool BoxesIntersect(const AABBox2& box0, const AABBox2& box1);
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/// Returns the intersection of given boxes
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AABBox2 Intersect(const AABBox2& box0, const AABBox2& box1);
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}
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#include <NsMath/AABBox.inl>
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#endif
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