ASM header

////////////////////////////////////////////////////////////////////////////////////////////////////
// file:    Black Paw Collision
//
// summary: some basic collision checking mechanics
//          they are written in asm to provide a fast frame
//          work for collision detection
////////////////////////////////////////////////////////////////////////////////////////////////////

#ifndef BP_COLLISION_H
#define BP_COLLISION_H

#include "BP_ToolSet.h"

////////////////////////////////////////////////////////////////////////////////////////////////////
// <summary>    Collision Type structures. </summary>
//
// <remarks>    Chris, 07/06/2012. </remarks>
////////////////////////////////////////////////////////////////////////////////////////////////////

//Cube/Rectangle collision type
typedef struct Ccube
{
    unsigned short x;
    unsigned short y;
    unsigned short width;
    unsigned short height;
}Ccube;

//Circle collision type
typedef struct Ccircle
{
    unsigned short x;
    unsigned short y;
    unsigned short Radius;
}ALIGN(4) Ccircle;



//This is most likely the wrong method to do this but I need a
//data store for the map collision function and with only 8
//registers it starts to get a little cramped
//this struct just stores the x and y of where the collison was triggered
typedef struct  Cpos
{
    unsigned short bottom;
    unsigned short BoolBottom; //not sure what data size a bool is and also to lazy to manage the change in data size
    unsigned short Top;
    unsigned short BoolTop;
    unsigned short Left;
    unsigned short BoolLeft;
    unsigned short Right;
    unsigned short BoolRight;
}Cpos;

Cpos CollisionPos;

////////////////////////////////////////////////////////////////////////////////////////////////////
// <summary>    Collision Detection between two Ccube objects
//              Uses AABB collision formula and written in ARM Thumb. </summary>
//
// <remarks>    Chris, 07/06/2012. </remarks>
////////////////////////////////////////////////////////////////////////////////////////////////////

bool BP_CIntersectBox(Ccube* a, Ccube* b);

////////////////////////////////////////////////////////////////////////////////////////////////////
// <summary>    Collision Detection between two Ccircle type
//              objects. </summary>
//
// <remarks>    Chris, 07/06/2012. </remarks>
////////////////////////////////////////////////////////////////////////////////////////////////////

bool BP_CIntersectCircle(Ccircle* a, Ccircle* b);

////////////////////////////////////////////////////////////////////////////////////////////////////
// <summary>    Collision Detection between The map and a Ccube object. </summary>
//
// <remarks>    Chris, 08/06/2012. </remarks>
////////////////////////////////////////////////////////////////////////////////////////////////////

bool BP_CMapBox(MapAtt* MapData, Ccube* Obj);

#endif