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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTDxInteractorStyleCamera.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm 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 "vtkTDxInteractorStyleCamera.h"
#include "vtkTransform.h"
#include <cassert>
#include "vtkCamera.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkTDxMotionEventInfo.h"
#include "vtkObjectFactory.h"
#include "vtkTDxInteractorStyleSettings.h"
vtkStandardNewMacro(vtkTDxInteractorStyleCamera);
// ----------------------------------------------------------------------------
vtkTDxInteractorStyleCamera::vtkTDxInteractorStyleCamera()
{
this->Transform=vtkTransform::New();
// this->DebugOn();
}
// ----------------------------------------------------------------------------
vtkTDxInteractorStyleCamera::~vtkTDxInteractorStyleCamera()
{
this->Transform->Delete();
}
// ----------------------------------------------------------------------------
void vtkTDxInteractorStyleCamera::OnMotionEvent(
vtkTDxMotionEventInfo *motionInfo)
{
assert("pre: motionInfo_exist" && motionInfo!=0);
vtkDebugMacro(<<"vtkTDxInteractorStyleCamera::OnMotionEvent()");
if(this->Renderer==0 || this->Settings==0)
{
vtkDebugMacro(<<"vtkTDxInteractorStyleCamera::OnMotionEvent() no renderer or no settings");
return;
}
vtkCamera *c=this->Renderer->GetActiveCamera();
vtkRenderWindow *w=this->Renderer->GetRenderWindow();
vtkRenderWindowInteractor *i=w->GetInteractor();
vtkDebugMacro(<< "x=" << motionInfo->X << " y=" << motionInfo->Y << " z="
<< motionInfo->Z
<< " angle=" << motionInfo->Angle << " rx="
<< motionInfo->AxisX << " ry="
<< motionInfo->AxisY << " rz="<< motionInfo->AxisZ);
vtkTransform *eyeToWorld=c->GetViewTransformObject();
double axisEye[3];
double axisWorld[3];
// As we want to rotate the camera, the incoming data are expressed in
// eye coordinates.
if(this->Settings->GetUseRotationX())
{
axisEye[0]=motionInfo->AxisX;
}
else
{
axisEye[0]=0.0;
}
if(this->Settings->GetUseRotationY())
{
axisEye[1]=motionInfo->AxisY;
}
else
{
axisEye[1]=0.0;
}
if(this->Settings->GetUseRotationZ())
{
axisEye[2]=motionInfo->AxisZ;
}
else
{
axisEye[2]=0.0;
}
// Get the rotation axis in world coordinates.
this->Transform->Identity();
this->Transform->Concatenate(eyeToWorld);
this->Transform->Inverse();
this->Transform->TransformVector(axisEye,axisWorld);
// Get the translation vector in world coordinates. Used at the end.
double translationEye[3];
double translationWorld[3];
translationEye[0]=motionInfo->X*this->Settings->GetTranslationXSensitivity();
translationEye[1]=motionInfo->Y*this->Settings->GetTranslationYSensitivity();
translationEye[2]=motionInfo->Z*this->Settings->GetTranslationZSensitivity();
this->Transform->TransformVector(translationEye,translationWorld);
this->Transform->Identity();
// default multiplication is "pre" which means applied to the "right" of
// the current matrix, which follows the OpenGL multiplication convention.
// 2. translate (affect position and focalPoint)
this->Transform->Translate(translationWorld);
// 1. build the displacement (aka affine rotation) with the axis
// passing through the focal point.
double *p=c->GetFocalPoint();
this->Transform->Translate(p[0],p[1],p[2]);
this->Transform->RotateWXYZ(motionInfo->Angle*
this->Settings->GetAngleSensitivity(),
axisWorld[0],axisWorld[1],axisWorld[2]);
this->Transform->Translate(-p[0],-p[1],-p[2]);
// Apply the transform to the camera position
double *pos=c->GetPosition();
double newPosition[3];
this->Transform->TransformPoint(pos,newPosition);
// Apply the vector part of the transform to the camera view up vector
double *up=c->GetViewUp();
double newUp[3];
this->Transform->TransformVector(up,newUp);
// Apply the transform to the camera position
double newFocalPoint[3];
this->Transform->TransformPoint(p,newFocalPoint);
// Set the new view up vector and position of the camera.
c->SetViewUp(newUp);
c->SetPosition(newPosition);
c->SetFocalPoint(newFocalPoint);
this->Renderer->ResetCameraClippingRange();
// Display the result.
i->Render();
}
//----------------------------------------------------------------------------
void vtkTDxInteractorStyleCamera::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
}
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