Test for coincident geometry with skybox floor plane

Rendering/OpenGL2/Testing/Cxx/CMakeLists.txt

@@ -27,6 +27,7 @@ vtk_add_test_cxx(vtkRenderingOpenGL2CxxTests tests
   TestBlurAndSobelPasses.cxx
   TestCameraShiftScale.cxx,NO_DATA
   TestCoincident.cxx
+  TestCoincidentFloor.cxx
   TestCompositeDataPointGaussian.cxx,NO_DATA
   TestCompositeDataPointGaussianSelection.cxx,NO_DATA
   TestCompositePolyDataMapper2.cxx,NO_DATA

Rendering/OpenGL2/Testing/Cxx/TestCoincidentFloor.cxx

+// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
+// SPDX-License-Identifier: BSD-3-Clause
+
+/**Description
+ * Tests the skybox floor projection with coincident polygonal geometry
+ */
+
+#include "vtkActor.h"
+#include "vtkCamera.h"
+#include "vtkJPEGReader.h"
+#include "vtkLight.h"
+#include "vtkNew.h"
+#include "vtkPLYReader.h"
+#include "vtkPlaneSource.h"
+#include "vtkPolyDataMapper.h"
+#include "vtkProperty.h"
+#include "vtkRegressionTestImage.h"
+#include "vtkRenderWindow.h"
+#include "vtkRenderWindowInteractor.h"
+#include "vtkRenderer.h"
+#include "vtkSkybox.h"
+#include "vtkTestUtilities.h"
+#include "vtkTesting.h"
+#include "vtkTexture.h"
+
+int TestCoincidentFloor(int argc, char* argv[])
+{
+  cout << "CTEST_FULL_OUTPUT (Avoid ctest truncation of output)" << endl;
+
+  vtkNew<vtkRenderer> renderer;
+
+  vtkNew<vtkLight> light;
+
+  light->SetLightTypeToSceneLight();
+  light->SetPosition(1.0, 7.0, 1.0);
+  renderer->AddLight(light);
+  vtkNew<vtkLight> light1;
+
+  light1->SetLightTypeToHeadlight();
+  light1->SetColor(1.0, 0.8, 1.0);
+  light1->SetIntensity(0.5);
+  renderer->AddLight(light1);
+
+  const char* jpgname = vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/beach.jpg");
+  vtkNew<vtkJPEGReader> jpg;
+  jpg->SetFileName(jpgname);
+  delete[] jpgname;
+
+  const char* fname = vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/bunny.ply");
+  vtkNew<vtkPLYReader> reader;
+  reader->SetFileName(fname);
+  delete[] fname;
+
+  vtkNew<vtkTexture> texture;
+  texture->InterpolateOn();
+  texture->RepeatOn();
+  texture->MipmapOn();
+  texture->SetInputConnection(jpg->GetOutputPort(0));
+
+  vtkNew<vtkPolyDataMapper> mapper;
+  mapper->SetInputConnection(reader->GetOutputPort());
+
+  vtkNew<vtkActor> actor;
+  actor->SetPosition(0, -0.2, 0);
+  actor->SetScale(6.0, 6.0, 6.0);
+  actor->GetProperty()->SetSpecular(0.5);
+  actor->GetProperty()->SetSpecularPower(20);
+  actor->GetProperty()->SetDiffuse(0.7);
+  actor->GetProperty()->SetAmbient(0.4);
+  actor->GetProperty()->SetAmbientColor(0.4, 0.0, 1.0);
+  renderer->AddActor(actor);
+  actor->SetMapper(mapper);
+
+  vtkNew<vtkPlaneSource> plane;
+  plane->SetOrigin(-0.5, 0.0, -0.5);
+  plane->SetPoint1(0.5, 0.0, -0.5);
+  plane->SetPoint2(-0.5, 0.0, 0.5);
+
+  vtkNew<vtkPolyDataMapper> pm;
+  pm->SetInputConnection(plane->GetOutputPort());
+
+  vtkNew<vtkActor> pa;
+  pa->SetMapper(pm);
+  pa->GetProperty()->SetColor(0.5, 0.23, 0.45);
+  renderer->AddActor(pa);
+
+  vtkNew<vtkSkybox> floor;
+  floor->SetFloorPlane(0, 1, 0, 0.0);
+  floor->SetFloorRight(0, 0, 1);
+  // Scale the texture coordinates;
+  floor->SetFloorTexCoordScale(1.2, 0.9);
+  floor->SetProjectionToFloor();
+  floor->SetTexture(texture);
+  renderer->AddActor(floor);
+
+  renderer->GetActiveCamera()->SetPosition(0.0, 0.55, 3.0);
+  renderer->GetActiveCamera()->SetFocalPoint(0.0, 0.55, 0.0);
+  renderer->SetBackground(0.6, 0.7, 1.0);
+
+  vtkNew<vtkRenderWindow> renWin;
+  renWin->AddRenderer(renderer);
+
+  vtkNew<vtkRenderWindowInteractor> iren;
+  iren->SetRenderWindow(renWin);
+  iren->Initialize();
+  renWin->Render();
+
+  int retVal = vtkRegressionTestImage(renWin);
+  if (retVal == vtkRegressionTester::DO_INTERACTOR)
+  {
+    iren->Start();
+  }
+
+  return !retVal;
+}

Rendering/OpenGL2/Testing/Data/Baseline/TestCoincidentFloor.png.sha512

+3c49faca41da626020e45a14b43b08412bbe200508e568930ee37374ae95f89d633bc9a4c6d4c7b211fffc4bc3ea6f47d42ee97dc3ce236dca389905de00ed05