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initial commit. This is icculus version 5542b94cae02a6333845854bbbd1abe0a259f1a4

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fgenesis 2011-08-03 22:05:33 +02:00
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BBGE/Interpolator.cpp Normal file
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/*
Copyright (C) 2007, 2010 - Bit-Blot
This file is part of Aquaria.
Aquaria 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
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "Interpolator.h"
void Interpolator::stop ()
{
interpolating = false;
}
void Interpolator::setUpdatee (float *u)
{
updatee = u;
}
void Interpolator::interpolateTo (float interTo, float time, int ltype)
{
if (!updatee)
{
errorLog ("No updatee set for interpolator!");
return;
}
loopType = ltype;
to = interTo;
timePeriod = time;
from = *updatee;
interpolating = true;
timePassed = 0.0f;
fakeTimePassed = 0.0f;
useSpeed = false;
}
void Interpolator::interpolateBySpeed (float interTo, float speed, int ltype)
{
this->speed = speed;
loopType = ltype;
to = interTo;
from = *updatee;
timePassed = 0.0f;
useSpeed = false;
timePeriod = fabsf(to-from) / speed;
interpolating = true;
}
void Interpolator::setSpeed (float s)
{
useSpeed = true;
interpolating = true;
speed = s;
}
void Interpolator::update (float dt)
{
if (interpolating)
{
if (initialDelay > 0)
{
initialDelay -= dt;
}
else
{
if (!useSpeed)
{
timePassed += dt*timeMultiplier;
if (timePassed >= timePeriod)
{
*updatee = to;
interpolating = false;
if (loopType != 0)
{
if (loopType > 0)
loopType -= 1;
if (pingPong)
interpolateTo (from, timePeriod, loopType);
else
{
*updatee = from;
interpolateTo (to, timePeriod, loopType);
}
}
}
else
{
*updatee = (to - from) * (timePassed / timePeriod);
*updatee += from;
}
}
else
{
*updatee += speed * dt;
if(*updatee > 255) *updatee = 0;
if(*updatee < 0) *updatee = 255;
/*
timePassed += speed *dt;
if (timePassed >= timePeriod)
{
*updatee = to;
interpolating = false;
if (loopType != 0)
{
if (loopType > 0)
loopType -= 1;
if (pingPong)
interpolateTo (from, timePeriod, loopType);
else
{
*updatee = from;
interpolateTo (to, timePeriod, loopType);
}
}
}
else
{
*updatee = (to - from) * (timePassed / timePeriod);
*updatee += from;
}
*/
/*
if (updatee >= to)
{
if (pingPong)
{
interpolateTo (from, timePeriod, loopType);
//if(*updatee > to) *updatee = 0;
//if(*updatee < from) *updatee = 255;
}
else
{
*updatee = from;
interpolateTo (to, timePeriod, loopType);
}
}
*/
}
}
}
}