44 lines
1.8 KiB
C++
Executable File
44 lines
1.8 KiB
C++
Executable File
// Collision.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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// Collision detection functions
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//
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// Usage: Fairly trivial; getCollisionObject( CEntity* entity ) will return the first entity colliding with the given entity.
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// The version with (x, y) parameters is just a helper; it temporarily moves the entity's collision bounds to the given
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// position before transferring to the other function.
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// Notes: getCollisionObject will only return the /first/ entity it finds in collision. This /may/ need a rethink when
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// multiple-entity (pileup) collisions become possible, I don't know.
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//
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// Mark Thompson mot20@cam.ac.uk / mark@wildfiregames.com
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#ifndef COLLISION_INCLUDED
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#define COLLISION_INCLUDED
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#include "BoundingObjects.h"
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#include "Entity.h"
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struct rayIntersectionResults
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{
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CEntity* Entity;
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CBoundingObject* boundingObject;
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CVector2D position;
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float closestApproach;
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float distance;
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};
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typedef std::vector<CEntity*> RayIntersects;
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HEntity getCollisionObject( CEntity* entity );
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HEntity getCollisionObject( CEntity* entity, float x, float y );
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CBoundingObject* getCollisionObject( CBoundingObject* bounds );
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CBoundingObject* getContainingObject( const CVector2D& point );
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CEntity* GetCollisionObject( float x, float y ); // Point collision
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bool getRayIntersection( const CVector2D& source, const CVector2D& forward, const CVector2D& right, float length, float maxDistance, CBoundingObject* destinationCollisionObject, rayIntersectionResults* results );
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// Assumes zero width, also includes moving units (other one doesn't).
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void GetProjectileIntersection( const CVector2D& position, const CVector2D& axis, float length, RayIntersects& results );
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// Stores results in shared area
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RayIntersects& GetProjectileIntersection( const CVector2D& position, const CVector2D& axis, float length );
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#endif
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