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/*=========================================================================
Program: Visualization Toolkit
Module: TestSprites.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.
=========================================================================*/
// .SECTION Thanks
// <verbatim>
//
// This file is based loosely on the PointSprites plugin developed
// and contributed by
//
// Copyright (c) CSCS - Swiss National Supercomputing Centre
// EDF - Electricite de France
//
// John Biddiscombe, Ugo Varetto (CSCS)
// Stephane Ploix (EDF)
//
// </verbatim>
#include "vtkActor.h"
#include "vtkCamera.h"
#include "vtkColorTransferFunction.h"
#include "vtkDataObject.h"
#include "vtkDataSetAttributes.h"
#include "vtkNew.h"
#include "vtkPiecewiseFunction.h"
#include "vtkPointGaussianMapper.h"
#include "vtkPointSource.h"
#include "vtkProperty.h"
#include "vtkRandomAttributeGenerator.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkSphereSource.h"
#include "vtkTimerLog.h"
#include "vtkTestUtilities.h"
#include "vtkRegressionTestImage.h"
int TestPointGaussianMapperOpacity(int argc, char *argv[])
{
int desiredPoints = 1.0e4;
vtkNew<vtkPointSource> points;
points->SetNumberOfPoints(desiredPoints);
points->SetRadius(pow(desiredPoints,0.33)*10.0);
points->Update();
vtkNew<vtkRandomAttributeGenerator> randomAttr;
randomAttr->SetInputConnection(points->GetOutputPort());
vtkNew<vtkPointGaussianMapper> mapper;
vtkNew<vtkRenderer> renderer;
renderer->SetBackground(0.0, 0.0, 0.0);
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->SetSize(300, 300);
renderWindow->SetMultiSamples(0);
renderWindow->AddRenderer(renderer.Get());
vtkNew<vtkRenderWindowInteractor> iren;
iren->SetRenderWindow(renderWindow.Get());
vtkNew<vtkActor> actor;
actor->SetMapper(mapper.Get());
renderer->AddActor(actor.Get());
randomAttr->SetDataTypeToFloat();
randomAttr->GeneratePointScalarsOn();
randomAttr->GeneratePointVectorsOn();
randomAttr->GeneratePointArrayOn();
randomAttr->Update();
mapper->SetInputConnection(randomAttr->GetOutputPort());
mapper->SetColorModeToMapScalars();
mapper->SetScalarModeToUsePointFieldData();
mapper->SelectColorArray("RandomPointVectors");
mapper->SetInterpolateScalarsBeforeMapping(0);
mapper->SetScaleArray("RandomPointScalars");
mapper->SetOpacityArray("RandomPointArray");
mapper->EmissiveOff();
// show other shader examples
// the fragment that is rendered is that of a triangle
// large enough to encompass a circle of radius 3
mapper->SetSplatShaderCode(
// this first line keeps the default color opacity calcs
// which you can then modify with additional code below
"//VTK::Color::Impl\n"
// example of a circle with black edges
// " float dist = sqrt(dot(offsetVCVSOutput.xy,offsetVCVSOutput.xy));\n"
// " if (dist > 1.1) { discard; }\n"
// " if (dist < 0.5) { discard; }\n"
// // apply a black edge around the circle
// " if (dist > 1.0 || dist < 0.6) { diffuseColor = vec3(0,0,0); ambientColor = vec3(0,0,0); }\n"
// example for a square
" if (abs(offsetVCVSOutput.x) > 1.0 || abs(offsetVCVSOutput.y) > 1.0) { discard; }\n"
" if (abs(offsetVCVSOutput.x) < 0.6 && abs(offsetVCVSOutput.y) < 0.6) { discard; }\n"
);
// since this shader only uses a radus of sqrt(2) we will adjust the mapper
// to render a smaller area than the default radius of 3.0
mapper->SetTriangleScale(1.5);
vtkNew<vtkColorTransferFunction> ctf;
ctf->AddHSVPoint(0.0,0.1,0.7,1.0);
ctf->AddHSVPoint(1.0,0.9,0.7,1.0);
ctf->SetColorSpaceToHSV();
ctf->HSVWrapOff();
mapper->SetLookupTable(ctf.Get());
vtkNew<vtkPiecewiseFunction> otf;
otf->AddPoint(0.0,0.3);
otf->AddPoint(1.0,1.0);
mapper->SetScalarOpacityFunction(otf.Get());
vtkNew<vtkTimerLog> timer;
timer->StartTimer();
renderWindow->Render();
timer->StopTimer();
double firstRender = timer->GetElapsedTime();
cerr << "first render time: " << firstRender << endl;
timer->StartTimer();
int numRenders = 85;
for (int i = 0; i < numRenders; ++i)
{
renderer->GetActiveCamera()->Azimuth(1);
renderer->GetActiveCamera()->Elevation(1);
renderWindow->Render();
}
timer->StopTimer();
double elapsed = timer->GetElapsedTime();
int numPts = mapper->GetInput()->GetPoints()->GetNumberOfPoints();
cerr << "interactive render time: " << elapsed / numRenders << endl;
cerr << "number of points: " << numPts << endl;
cerr << "points per second: " << numPts*(numRenders/elapsed) << endl;
renderer->GetActiveCamera()->SetPosition(0,0,1);
renderer->GetActiveCamera()->SetFocalPoint(0,0,0);
renderer->GetActiveCamera()->SetViewUp(0,1,0);
renderer->ResetCamera();
// renderer->GetActiveCamera()->Print(cerr);
renderer->GetActiveCamera()->Zoom(10.0);
renderWindow->Render();
int retVal = vtkRegressionTestImage( renderWindow.Get() );
if ( retVal == vtkRegressionTester::DO_INTERACTOR)
{
iren->Start();
}
return !retVal;
}
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