source: orxonox.OLD/orxonox/trunk/src/lib/graphics/particles/quick_animation.cc @ 4415

/* 
   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: ...
   co-programmer: ...
*/

//#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_

#include "quick_animation.h"

#include "compiler.h"
#include "debug.h"
#ifndef NULL
#define NULL 0
#endif


using namespace std;


/**
   \brief standard constructor
*/
QuickAnimation::QuickAnimation (float rangeStart, float valueStart, float rangeEnd, float valueEnd)
{
   this->setClassName("QuickAnimation");

   this->first = this->current = new QuickKeyFrame;
   this->current->positionStart = rangeStart;
   this->current->positionEnd = rangeEnd;
   this->current->valueStart = valueStart;
   this->current->valueEnd = valueEnd;
   this->current->next = NULL;
}


/**
   \brief standard deconstructor

*/
QuickAnimation::~QuickAnimation () 
{
  this->current = this->first;
  QuickKeyFrame delKF;
  
  while (this->current != NULL)
    {
      this->first = this->current->next;
      delete this->current;
      this->current = this->first;
    }

}


void QuickAnimation::addEntry(float position, float value)
{
  this->current = this->first;
  if (position < this->current->positionStart)
    {
      this->current = new QuickKeyFrame;

      this->current->positionStart = position;
      this->current->positionEnd = this->first->positionStart;

      this->current->valueStart = value;
      this->current->valueEnd = this->first->valueStart;
      
      this->current->next = this->first;
      this->first = this->current;
    }
  
  while(this->current != NULL)
    {
      if (this->current->positionStart < position)
        {
          QuickKeyFrame* tmpKey = new QuickKeyFrame;
          tmpKey->positionStart = position;
          tmpKey->positionEnd = this->current->positionEnd;
          tmpKey->valueStart = value;
          tmpKey->valueEnd = this->current->valueEnd;
          tmpKey->next = this->current->next;
          
          this->current->positionEnd = tmpKey->positionStart;
          this->current->valueEnd = tmpKey->valueStart;
        }
    }
}


float QuickAnimation::getValue(float position)
{
  while (likely (this->current->positionStart > position || this->current->positionEnd < position))
    {
      if (likely(this->current->next != NULL))
        this->current = this->current->next;
      else
        {
          if (unlikely(this->first->positionStart > position))
            {
              PRINTF(2)("Position out of range. chose %f, min is: %f, max is\n", position, this->first->positionStart, this->current->positionEnd);
              return 0;
            }
          this->current = this->first;
        }
    }
  return this->current->valueStart + (this->current->positionEnd - position) *
    (this->current->valueEnd - this->current->valueStart) /
    (this->current->positionEnd - this->current->positionStart);
}