laCollisionScenario.h

/*

Jump'n'Run Engine
http://www.atanaslaskov.com/jnr/

BSD LICENSE
Copyright (c) 2007-2013, Atanas Laskov
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL ATANAS LASKOV BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/


//
// FILE: laCollisionScenario.h
//
// This clas contains all the information deeded to describe a collision scenario and
// store the result of collision detection
//
// Copyright (C) 2007-2013 Atanas Laskov, <latanas@gmail.com>
//

class laCollisionScenario
{
public:
    // List of collision domains to be tested against
    //
    laCollisionDomain *pFirstDomain;
    unsigned long nDomains;
    unsigned nElementCount;


    laPoint2 ptPosition;        // Position of the moving object
    laPoint2 ptVector;      // Velocity of the moving object

    // Output parameters
    //
    M_BOOL bCollision;                  // Collision detected?
    laPoint2 ptModifiedVector;      // Modified velocity (avoids collision)

    // Pointer to a trap object, if a collision has occured with a trapped object,
    // otherwise NULL
    //
    rpgTrap *pTrap;

    //Constructor
    //
    laCollisionScenario()
    {
        pFirstDomain = NULL;
        nDomains = 0;
        bCollision = M_FALSE;
        pTrap = NULL;
    }

protected:
    M_BOOL     bInverted;
    laLine2  lnCollision;
    laPoint2 ptCausing;
    laPoint2 ptIntersection;

    friend class laCollider;
    friend class stageCollisionTests;
};