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/*=========================================================================
Program: Visualization Toolkit
Module: vtkOSPRayCameraNode.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 "vtkOSPRayCameraNode.h"
#include "vtkCamera.h"
#include "vtkCollectionIterator.h"
#include "vtkInformation.h"
#include "vtkInformationIntegerKey.h"
#include "vtkOSPRayRendererNode.h"
#include "vtkObjectFactory.h"
#include "vtkRenderWindow.h"
#include "vtkRenderer.h"
#include "vtkWindow.h"
#include "RTWrapper/RTWrapper.h"
//============================================================================
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkOSPRayCameraNode);
//------------------------------------------------------------------------------
vtkOSPRayCameraNode::vtkOSPRayCameraNode() = default;
//------------------------------------------------------------------------------
vtkOSPRayCameraNode::~vtkOSPRayCameraNode() = default;
//------------------------------------------------------------------------------
void vtkOSPRayCameraNode::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//------------------------------------------------------------------------------
void vtkOSPRayCameraNode::Render(bool prepass)
{
if (prepass)
{
vtkOSPRayRendererNode* orn =
static_cast<vtkOSPRayRendererNode*>(this->GetFirstAncestorOfType("vtkOSPRayRendererNode"));
vtkRenderer* ren = vtkRenderer::SafeDownCast(orn->GetRenderable());
RTW::Backend* backend = orn->GetBackend();
if (backend == nullptr)
return;
vtkRenderWindow* rwin = vtkRenderWindow::SafeDownCast(ren->GetVTKWindow());
bool stereo = false;
bool right = false;
if (rwin)
{
if (rwin->GetStereoRender() == 1)
{
stereo = true;
}
}
double* vp = orn->GetViewport();
int* ts = orn->GetScale();
vtkCamera* cam = static_cast<vtkCamera*>(this->Renderable);
double myDistance = cam->GetDistance();
double myEyeSeparation = cam->GetEyeSeparation();
double myScaledEyeSeparation = myEyeSeparation * myDistance;
double shiftDistance = (myScaledEyeSeparation / 2);
double* myFocalPoint = cam->GetFocalPoint();
double myFocalDisk = cam->GetFocalDisk();
double myFocalDistance = cam->GetFocalDistance();
if (!cam->GetLeftEye())
{
right = true;
}
OSPCamera ospCamera;
if (cam->GetParallelProjection())
{
// TODO: looks like imageStart/imageEnd doesn't work in ortho mode
double height = cam->GetParallelScale() * 2 * ts[0];
ospCamera = ospNewCamera("orthographic");
ospSetFloat(ospCamera, "height", height);
}
else
{
// TODO: there's a rounding error here since TileScale is an int
double fovy = cam->GetViewAngle() * ts[0];
ospCamera = ospNewCamera("perspective");
ospSetFloat(ospCamera, "fovy", fovy);
if (myFocalDistance > 0.0)
{
ospSetFloat(ospCamera, "focusDistance", myFocalDistance);
ospSetFloat(ospCamera, "apertureRadius", 0.5 * myFocalDisk);
}
else
{
ospSetFloat(ospCamera, "focusDistance", 0.0f);
ospSetFloat(ospCamera, "apertureRadius", 0.0f);
}
}
ospSetObject(orn->GetORenderer(), "camera", ospCamera);
int tiledSize[2];
orn->GetSize(tiledSize);
ospSetFloat(ospCamera, "aspect", float(tiledSize[0]) / float(tiledSize[1]));
double* pos = cam->GetPosition();
double shiftedCamPos[3];
if (stereo)
{
// todo this is good for starters, but we should reuse the code
// or results from vtk proper to ensure 1:1 match with GL
if (!right)
{
shiftedCamPos[0] = pos[0] - shiftDistance;
}
else
{
shiftedCamPos[0] = pos[0] + shiftDistance;
}
}
else
{
shiftedCamPos[0] = pos[0];
}
shiftedCamPos[1] = pos[1];
shiftedCamPos[2] = pos[2];
ospSetVec3f(ospCamera, "position", shiftedCamPos[0], shiftedCamPos[1], shiftedCamPos[2]);
double* up = cam->GetViewUp();
ospSetVec3f(ospCamera, "up", up[0], up[1], up[2]);
// double *dop = cam->GetDirectionOfProjection();
double shiftedDOP[3];
shiftedDOP[0] = myFocalPoint[0] - shiftedCamPos[0];
shiftedDOP[1] = myFocalPoint[1] - shiftedCamPos[1];
shiftedDOP[2] = myFocalPoint[2] - shiftedCamPos[2];
// ospSet3f(ospCamera, "dir", dop[0], dop[1], dop[2]);
ospSetVec3f(ospCamera, "direction", shiftedDOP[0], shiftedDOP[1], shiftedDOP[2]);
ospSetVec2f(ospCamera, "imageStart", (float)vp[0], (float)vp[1]);
ospSetVec2f(ospCamera, "imageEnd", (float)vp[2], (float)vp[3]);
ospCommit(ospCamera);
ospRelease(ospCamera);
this->oCamera = ospCamera;
}
}
VTK_ABI_NAMESPACE_END
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