source: orxonox.OLD/branches/bsp_model/src/lib/collision_reaction/cr_physics_ground_walk.cc @ 8538

/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: Patrick Boenzli
   co-programmer: ...
*/

#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_COLLISION_REACTION

#include "collision.h"
#include "collision_event.h"

#include "physics_interface.h"

#include "world_entity.h"
#include "cr_physics_ground_walk.h"

#include <vector>

using namespace std;


/**
 *  standard constructor
 */
CRPhysicsGroundWalk::CRPhysicsGroundWalk ()
  : CollisionReaction()
{
  this->setClassID(CL_CR_PHYSICS_GROUND_WALK, "CRPhysicsGroundWalk");
}


/**
 *  standard deconstructor
 */
CRPhysicsGroundWalk::~CRPhysicsGroundWalk ()
{
}


/**
 * caluculates and applys the reaction to a specific collision
 *  @param collision the collision
 */
void CRPhysicsGroundWalk::reactToCollision(Collision* collision)
{
  CollisionEvent* ce = collision->getCollisionEvents().front();
  Vector normal = ce->getGroundNormal();
  // normal.normalize();

  // put it back
//   PRINTF(0)("putting it back to lastPos: \n");
//   this->lastPositions[0].debug();
//   PRINTF(0)("current pos:\n");
//   collision->getEntityB()->getAbsCoor().debug();
  
  
  Vector height = ce->getCollisionPosition() - collision->getEntityB()->getAbsCoor();
  if(ce->getGroundNormal().len() <= 0.1f)
  {
    collision->getEntityB()->setAbsCoor(collision->getEntityB()->getLastAbsCoor());
    return;
  }
  if(height.y < -3.6)
  {
    downspeed++;
    collision->getEntityB()->setAbsCoor(collision->getEntityB()->getAbsCoor() + Vector(0.0,-0.03*downspeed,0.0));
    
  }
  else
  {
    if(height.y > -3.5  && height.y <    3.9)
    {
      //if(downspeed <= 0) downspeed =1;
      collision->getEntityB()->setAbsCoor(collision->getEntityB()->getAbsCoor() + Vector(0.0,height.y+3.55,0.0));   
      //collision->getEntityB()->setVelocity(Vector(0.0,0.0,0.0));    
    }
      downspeed = 0;
  }
  

  /*
  PRINTF(0)("Collision with Ground: \n");
  collision->getEntityB()->getAbsCoor().debug();
  collision->getEntityB()->setVelocity(Vector());
  collision->getEntityB()->setAbsCoor(this->lastPositions[1]);
  
  */
}




/**
 * use this to do some collision offline calculations, only called for bContinuousPoll == true
 */
void CRPhysicsGroundWalk::update(WorldEntity* owner)
{
  for( int i = 9; i > 0; i--) {
    this->lastPositions[i] = this->lastPositions[i-1];
//     PRINTF(0)("lastPosition[%i]: %f, %f, %f\n", i, lastPositions[i].x, lastPositions[i].y, lastPositions[i].z);
  }
  this->lastPositions[0] = owner->getAbsCoor();
}