forked from 0ad/0ad
76 lines
2.5 KiB
C++
Executable File
76 lines
2.5 KiB
C++
Executable File
// BoundingObjects.h
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//
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// Mark Thompson mot20@cam.ac.uk / mark@wildfiregames.com
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//
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// Bounding circle and object-aligned bounding box. 2D, for simulation code.
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//
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// Note: object-aligned bounding boxes are often referred to as oriented bounding boxes (OBBs)
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#ifndef BOUNDING_OBJECTS_INCLUDED
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#define BOUNDING_OBJECTS_INCLUDED
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#include "Vector2D.h"
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class CBoundingBox;
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class CBoundingCircle;
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class CBoundingObject
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{
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public:
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CBoundingObject() {}
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enum EBoundingType
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{
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BOUND_NONE,
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BOUND_CIRCLE,
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BOUND_OABB
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};
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EBoundingType m_type;
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CVector2D m_pos;
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float m_radius;
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float m_height;
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void setPosition( float x, float y );
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void setHeight( float height );
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bool intersects( CBoundingObject* obj );
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bool contains( const CVector2D& point );
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virtual bool _intersects( CBoundingObject* obj, const CVector2D& delta ) = 0;
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virtual bool _contains( const CVector2D& point, const CVector2D& delta ) = 0;
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virtual void render( float height ) = 0; // Temporary
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};
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class CBoundingCircle : public CBoundingObject
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{
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public:
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CBoundingCircle() { m_type = BOUND_OABB; }
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CBoundingCircle( float x, float y, float radius, float height );
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CBoundingCircle( float x, float y, CBoundingCircle* copy );
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void setRadius( float radius );
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bool _intersects( CBoundingObject* obj, const CVector2D& delta );
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bool _contains( const CVector2D& point, const CVector2D& delta );
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void render( float height ); // Temporary
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};
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class CBoundingBox : public CBoundingObject
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{
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public:
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CBoundingBox() { m_type = BOUND_OABB; }
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CVector2D m_u; // Unit vector along the direction of this box's depth.
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CVector2D m_v; // Unit vector along the direction of this box's width.
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float m_d; // Half this box's depth.
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float m_w; // Half this box's width.
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CBoundingBox( float x, float y, float orientation, float width, float depth, float height );
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CBoundingBox( float x, float y, const CVector2D& orientation, float width, float depth, float height );
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CBoundingBox( float x, float y, float orientation, CBoundingBox* copy );
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CBoundingBox( float x, float y, const CVector2D& orientation, CBoundingBox* copy );
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void setDimensions( float width, float depth );
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void setOrientation( float orientation );
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void setOrientation( const CVector2D& orientation );
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float getWidth() const { return( 2.0f * m_w ); };
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float getDepth() const { return( 2.0f * m_d ); };
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bool _intersects( CBoundingObject* obj, const CVector2D& delta );
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bool _contains( const CVector2D& point, const CVector2D& delta );
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void render( float height ); // Temporary
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};
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#endif
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