TestChartDoubleColors.cxx 3.57 KB
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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    TestChartDoubleColors.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 "vtkRenderWindow.h"
#include "vtkChartXY.h"
#include "vtkPlotPoints.h"
#include "vtkPlotBar.h"
#include "vtkPlotLine.h"
#include "vtkLookupTable.h"
#include "vtkTable.h"
#include "vtkDoubleArray.h"
#include "vtkContextView.h"
#include "vtkContextScene.h"
#include "vtkPen.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkNew.h"
#include "vtkAxis.h"
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#include "vtkMath.h"
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//----------------------------------------------------------------------------
int TestChartDoubleColors(int, char *[])
{
  // Set up a 2D scene, add an XY chart to it
  vtkNew<vtkContextView> view;
  view->GetRenderWindow()->SetSize(400, 300);
  vtkNew<vtkChartXY> chart;
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  view->GetScene()->AddItem(chart);
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  // Create a table with some points in it...
  vtkNew<vtkTable> table;
  vtkNew<vtkDoubleArray> arrX;
  arrX->SetName("X");
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  table->AddColumn(arrX);
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  vtkNew<vtkDoubleArray> arrC;
  arrC->SetName("f1");
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  table->AddColumn(arrC);
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  vtkNew<vtkDoubleArray> arrS;
  arrS->SetName("f2");
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  table->AddColumn(arrS);
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  vtkNew<vtkDoubleArray> arrS2;
  arrS2->SetName("f3");
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  table->AddColumn(arrS2);
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  vtkNew<vtkDoubleArray> arrColor;
  arrColor->SetName("color");
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  table->AddColumn(arrColor);
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  // Test charting with a few more points...
  int numPoints = 69;
  float inc = 7.5 / (numPoints - 1);
  table->SetNumberOfRows(numPoints);
  for (int i = 0; i < numPoints; ++i)
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  {
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    double x(i * inc + 0.2);
    table->SetValue(i, 0, x);
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    table->SetValue(i, 1, 1.0e-80 * (cos(x - 1.0) + sin(x - vtkMath::Pi() / 4.0)));
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    table->SetValue(i, 2, 1.0e-80 * sin(x) * 1e-12);
    table->SetValue(i, 3, 1.0e-80 * sin(x - 1.0));
    table->SetValue(i, 4, cos(i * inc));
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  }
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  vtkNew<vtkLookupTable> lut;
  lut->SetValueRange(0.0, 1.0);
  lut->SetSaturationRange(1.0, 1.0);
  lut->SetHueRange(0.4, 0.9);
  lut->SetAlphaRange(0.2, 0.8);
  lut->SetRange(-1.0, 1.0);
  lut->SetRampToLinear();
  lut->Build();

  // Add multiple line plots, setting the colors etc
  vtkNew<vtkPlotPoints> points;
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  chart->AddPlot(points);
  points->SetInputData(table, 0, 1);
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  points->SetMarkerSize(10.0);
  points->ScalarVisibilityOn();
  points->SelectColorArray("color");
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  points->SetLookupTable(lut);
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  vtkNew<vtkPlotLine> line;
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  chart->AddPlot(line);
  line->SetInputData(table, 0, 2);
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  line->SetColor(1.0, 0.0, 0.0);
  // Put this plot in a different corner - it is orders of magnitude smaller.
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  chart->SetPlotCorner(line, 1);
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  vtkNew<vtkPlotBar> bar;
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  chart->AddPlot(bar);
  bar->SetInputData(table, 0, 3);
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  bar->ScalarVisibilityOn();
  bar->SelectColorArray("color");
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  bar->SetLookupTable(lut);
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  bar->GetPen()->SetLineType(vtkPen::NO_PEN);

  chart->GetAxis(vtkAxis::LEFT)->SetTitle("A tiny range");
  chart->GetAxis(vtkAxis::BOTTOM)->SetTitle("A normal range");
  chart->GetAxis(vtkAxis::RIGHT)->SetTitle("An even tinier range");
  chart->SetBarWidthFraction(1.0f);

  // Render the scene and compare the image to a reference image
  view->GetRenderWindow()->SetMultiSamples(0);
  view->GetInteractor()->Initialize();
  view->GetInteractor()->Start();

  return EXIT_SUCCESS;
}