1 /*=========================================================================
2
3 Program: Visualization Toolkit
4
5 Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
6 All rights reserved.
7 See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
8
9 This software is distributed WITHOUT ANY WARRANTY; without even
10 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
11 PURPOSE. See the above copyright notice for more information.
12
13 =========================================================================*/
14 // test baking shadow maps
15 //
16 // The command line arguments are:
17 // -I => run in interactive mode; unless this is used, the program will
18 // not allow interaction and exit
19
20 #include "vtkActor.h"
21 #include "vtkCamera.h"
22 #include "vtkCellArray.h"
23 #include "vtkLightKit.h"
24 #include "vtkNew.h"
25 #include "vtkOpenGLRenderer.h"
26 #include "vtkOpenGLTexture.h"
27 #include "vtkPLYReader.h"
28 #include "vtkPlaneSource.h"
29 #include "vtkPointData.h"
30 #include "vtkPolyDataMapper.h"
31 #include "vtkProperty.h"
32 #include "vtkRegressionTestImage.h"
33 #include "vtkRenderWindow.h"
34 #include "vtkRenderWindowInteractor.h"
35 #include "vtkRenderer.h"
36 #include "vtkShadowMapBakerPass.h"
37 #include "vtkTestUtilities.h"
38 #include "vtkTextureObject.h"
39 #include "vtkTimerLog.h"
40
41
42 //----------------------------------------------------------------------------
TestShadowMapBakerPass(int argc,char * argv[])43 int TestShadowMapBakerPass(int argc, char *argv[])
44 {
45 vtkNew<vtkActor> actor;
46 vtkNew<vtkRenderer> renderer;
47 vtkNew<vtkPolyDataMapper> mapper;
48 renderer->SetBackground(0.3, 0.4, 0.6);
49 vtkNew<vtkRenderWindow> renderWindow;
50 renderWindow->SetSize(600, 600);
51 renderWindow->AddRenderer(renderer);
52 renderer->AddActor(actor);
53 vtkNew<vtkRenderWindowInteractor> iren;
54 iren->SetRenderWindow(renderWindow);
55 vtkNew<vtkLightKit> lightKit;
56 lightKit->AddLightsToRenderer(renderer);
57
58 const char* fileName =
59 vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/dragon.ply");
60 vtkNew<vtkPLYReader> reader;
61 reader->SetFileName(fileName);
62 reader->Update();
63
64 delete [] fileName;
65
66 mapper->SetInputConnection(reader->GetOutputPort());
67 //mapper->SetInputConnection(norms->GetOutputPort());
68 actor->SetMapper(mapper);
69 actor->GetProperty()->SetAmbientColor(0.2, 0.2, 1.0);
70 actor->GetProperty()->SetDiffuseColor(1.0, 0.65, 0.7);
71 actor->GetProperty()->SetSpecularColor(1.0, 1.0, 1.0);
72 actor->GetProperty()->SetSpecular(0.5);
73 actor->GetProperty()->SetDiffuse(0.7);
74 actor->GetProperty()->SetAmbient(0.5);
75 actor->GetProperty()->SetSpecularPower(20.0);
76 actor->GetProperty()->SetOpacity(1.0);
77 //actor->GetProperty()->SetRepresentationToWireframe();
78
79 renderWindow->SetMultiSamples(0);
80
81 vtkNew<vtkShadowMapBakerPass> bakerPass;
82
83 // tell the renderer to use our render pass pipeline
84 vtkOpenGLRenderer *glrenderer =
85 vtkOpenGLRenderer::SafeDownCast(renderer);
86 glrenderer->SetPass(bakerPass);
87
88 vtkNew<vtkTimerLog> timer;
89 timer->StartTimer();
90 renderWindow->Render();
91 timer->StopTimer();
92 double firstRender = timer->GetElapsedTime();
93 cerr << "baking time: " << firstRender << endl;
94
95 // get a shadow map
96 vtkTextureObject *to = (*bakerPass->GetShadowMaps())[2];
97 // by default the textures have depth comparison on
98 // but for simple display we need to turn it off
99 to->SetDepthTextureCompare(false);
100
101 // now render this texture so we can see the depth map
102 vtkNew<vtkActor> actor2;
103 vtkNew<vtkPolyDataMapper> mapper2;
104 vtkNew<vtkOpenGLTexture> texture;
105 texture->SetTextureObject(to);
106 actor2->SetTexture(texture);
107 actor2->SetMapper(mapper2);
108
109 vtkNew<vtkPlaneSource> plane;
110 mapper2->SetInputConnection(plane->GetOutputPort());
111 renderer->RemoveActor(actor);
112 renderer->AddActor(actor2);
113 glrenderer->SetPass(nullptr);
114
115 renderer->ResetCamera();
116 renderer->GetActiveCamera()->Zoom(2.0);
117 renderWindow->Render();
118
119 int retVal = vtkRegressionTestImage( renderWindow );
120 if ( retVal == vtkRegressionTester::DO_INTERACTOR)
121 {
122 iren->Start();
123 }
124
125 bakerPass->ReleaseGraphicsResources(renderWindow);
126 return !retVal;
127 }
128