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/*=========================================================================
Program: ParaView
Module: vtkSequenceAnimationPlayer.cxx
Copyright (c) Kitware, Inc.
All rights reserved.
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkSequenceAnimationPlayer.h"
#include "vtkObjectFactory.h"
vtkStandardNewMacro(vtkSequenceAnimationPlayer);
//----------------------------------------------------------------------------
vtkSequenceAnimationPlayer::vtkSequenceAnimationPlayer()
{
this->NumberOfFrames = 10;
this->FrameNo = 0;
}
//----------------------------------------------------------------------------
vtkSequenceAnimationPlayer::~vtkSequenceAnimationPlayer()
{
}
//----------------------------------------------------------------------------
void vtkSequenceAnimationPlayer::StartLoop(double starttime, double endtime,
double* playbackWindow)
{
// the frame index is inited to 0 ONLY when an animation is not resumed from
// an intermediate frame
this->FrameNo = 0;
this->StartTime = starttime;
this->EndTime = endtime;
// currenttime, which might be the 'scene time' (usually unequal to
// starttime) upon the previous pause / stop operation (if any), is used to
// determine the actual frame index from which to resume the animation
if (playbackWindow[0] > starttime)
{
// let's resume from the frame NEXT to the one on which the animation WAS
// paused / stopped
this->FrameNo = static_cast<int>( (playbackWindow[0] - this->StartTime) *
(this->NumberOfFrames - 1) /
(this->EndTime - this->StartTime) + 0.5
) + 1;
// Let's compute the upper bounds in Frame unit
this->MaxFrameWindow = static_cast<int>( (playbackWindow[1] - this->StartTime) *
(this->NumberOfFrames - 1) /
(this->EndTime - this->StartTime) + 0.5
) + 1;
}
}
//----------------------------------------------------------------------------
double vtkSequenceAnimationPlayer::GetNextTime(double curtime)
{
if(this->FrameNo == 0 && curtime > this->StartTime)
{
// Invalid Frame No, compute it correctly
this->FrameNo = static_cast<int>( (curtime - this->StartTime) *
(this->NumberOfFrames - 1) /
(this->EndTime - this->StartTime) + 0.5
) + 1;
}
this->FrameNo++;
if (this->StartTime >= this->EndTime && this->FrameNo >= this->MaxFrameWindow)
{
return VTK_DOUBLE_MAX;
}
double time = this->StartTime +
((this->EndTime - this->StartTime)*this->FrameNo)/(this->NumberOfFrames-1);
return time;
}
//----------------------------------------------------------------------------
double vtkSequenceAnimationPlayer::GoToNext(double start, double end, double curtime)
{
double delta = static_cast<double>(end-start)/(this->NumberOfFrames-1);
return (curtime + delta);
}
//----------------------------------------------------------------------------
double vtkSequenceAnimationPlayer::GoToPrevious(double start, double end, double curtime)
{
double delta = static_cast<double>(end-start)/(this->NumberOfFrames-1);
return (curtime - delta);
}
//----------------------------------------------------------------------------
void vtkSequenceAnimationPlayer::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
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