VTK Users Guide 中C++例程之multiLineText

本人将《The VTK User’s Guide 11th Edition 》中的TCL编写的例程进行了C++的转换，使用的平台是VS2015，VTK版本是8.0.1。之所以贴出来，以求方便大家使用C++来进行VTK的研究。
VTK/Examples/Annotation/Tcl/multiLineText.tcl 之转成C++
  1 #include "vtkAutoInit.h"
  2 #include "vtkTextProperty.h"
  3 #include "vtkTextMapper.h"
  4 #include "vtkActor2D.h"
  5 #include "vtkPoints.h"
  6 #include "vtkCellArray.h"
  7 #include "vtkPolyData.h"
  8 #include "vtkCoordinate.h"
  9 #include "vtkPolyDataMapper2D.h"
 10 #include "vtkProperty2D.h"
 11 #include "vtkRenderer.h"
 12 #include "vtkRenderWindow.h"
 13 #include "vtkRenderWindowInteractor.h"
 14 #include "vtkCamera.h"
 15 
 16 int main()
 17 {
 18     VTK_MODULE_INIT(vtkRenderingOpenGL2);
 19     VTK_MODULE_INIT(vtkRenderingFreeType);
 20     VTK_MODULE_INIT(vtkInteractionStyle);
 21 
 22     // Create the text mappers and the associated Actor2Ds.
 23 
 24     //The font and text properties (except justification) are the same for each
 25     //single line mapper.Let's create a common text property object
 26     vtkTextProperty *singleLineTextProp = vtkTextProperty::New();
 27     singleLineTextProp->SetFontSize(14);
 28     singleLineTextProp->SetFontFamilyToArial();
 29     singleLineTextProp->BoldOff();
 30     singleLineTextProp->ItalicOff();
 31     singleLineTextProp->ShadowOff();
 32 
 33     //The font and text properties(except justification) are the same for each
 34     //multi line mapper.Let's create a common text property object
 35     vtkTextProperty *multiLineTextProp = vtkTextProperty::New();
 36     multiLineTextProp->ShallowCopy(singleLineTextProp);
 37     multiLineTextProp->BoldOn();
 38     multiLineTextProp->ItalicOn();
 39     multiLineTextProp->ShadowOn();
 40     multiLineTextProp->SetLineSpacing(0.8);
 41 
 42     //The text is on a single line and bottom-justified.
 43     vtkTextMapper *singleLineTextB = vtkTextMapper::New();
 44     singleLineTextB->SetInput("Single line (bottom)");
 45     singleLineTextB->GetTextProperty()->ShallowCopy(singleLineTextProp);
 46     singleLineTextB->GetTextProperty()->SetVerticalJustificationToBottom();
 47     singleLineTextB->GetTextProperty()->SetColor(1, 0, 0);
 48     vtkActor2D *singleLineTextActorB = vtkActor2D::New();
 49     singleLineTextActorB->SetMapper(singleLineTextB);
 50     singleLineTextActorB->GetPositionCoordinate()->SetCoordinateSystemToNormalizedDisplay();
 51     singleLineTextActorB->GetPositionCoordinate()->SetValue(0.05, 0.85);
 52 
 53     //The text is on a single line and center-justified (vertical justification).
 54     vtkTextMapper *singleLineTextC = vtkTextMapper::New();
 55     singleLineTextC->SetInput("Single line (centered)");
 56     singleLineTextC->GetTextProperty()->ShallowCopy(singleLineTextProp);
 57     singleLineTextC->GetTextProperty()->SetVerticalJustificationToCentered();
 58     singleLineTextC->GetTextProperty()->SetColor(0, 1, 0);
 59     vtkActor2D *singleLineTextActorC = vtkActor2D::New();
 60     singleLineTextActorC->SetMapper(singleLineTextC);
 61     singleLineTextActorC->GetPositionCoordinate()->SetCoordinateSystemToNormalizedDisplay();
 62     singleLineTextActorC->GetPositionCoordinate()->SetValue(0.05, 0.75);
 63 
 64     //The text is on a single line and top-justified.
 65     vtkTextMapper *singleLineTextT = vtkTextMapper::New();
 66     singleLineTextT->SetInput("Single line (top)");
 67     singleLineTextT->GetTextProperty()->ShallowCopy(singleLineTextProp);
 68     singleLineTextT->GetTextProperty()->SetVerticalJustificationToTop();
 69     singleLineTextT->GetTextProperty()->SetColor(0, 0, 1);
 70     vtkActor2D *singleLineTextActorT = vtkActor2D::New();
 71     singleLineTextActorT->SetMapper(singleLineTextT);
 72     singleLineTextActorT->GetPositionCoordinate()->SetCoordinateSystemToNormalizedDisplay();
 73     singleLineTextActorT->GetPositionCoordinate()->SetValue(0.05, 0.65);
 74 
 75     //The text is on multiple lines and left- and top-justified.
 76     vtkTextMapper *textMapperL = vtkTextMapper::New();
 77     textMapperL->SetInput("This is\nmulti-line\ntext output\n(left-top)");
 78     textMapperL->GetTextProperty()->ShallowCopy(multiLineTextProp);
 79     textMapperL->GetTextProperty()->SetJustificationToLeft();
 80     textMapperL->GetTextProperty()->SetVerticalJustificationToTop();
 81     textMapperL->GetTextProperty()->SetColor(1, 0, 0);
 82     vtkActor2D *textActorL = vtkActor2D::New();
 83     textActorL->SetMapper(textMapperL);
 84     textActorL->GetPositionCoordinate()->SetCoordinateSystemToNormalizedDisplay();
 85     textActorL->GetPositionCoordinate()->SetValue(0.05, 0.5);
 86 
 87     // The text is on multiple lines and center-justified (both horizontal and
 88     // vertical).
 89     vtkTextMapper *textMapperC = vtkTextMapper::New();
 90     textMapperC->SetInput("This is\nmulti-line\ntext output\n(centered)");
 91     textMapperC->GetTextProperty()->ShallowCopy(multiLineTextProp);
 92     textMapperC->GetTextProperty()->SetJustificationToCentered();
 93     textMapperC->GetTextProperty()->SetVerticalJustificationToCentered();
 94     textMapperC->GetTextProperty()->SetColor(0, 1, 0);
 95     vtkActor2D *textActorC = vtkActor2D::New();
 96     textActorC->SetMapper(textMapperC);
 97     textActorC->GetPositionCoordinate()->SetCoordinateSystemToNormalizedDisplay();
 98     textActorC->GetPositionCoordinate()->SetValue(0.5, 0.5);
 99 
100     //The text is on multiple lines and right- and bottom-justified.
101     vtkTextMapper *textMapperR = vtkTextMapper::New();
102     textMapperR->SetInput("This is\nmulti-line\ntext output\n(right-bottom)");
103     textMapperR->GetTextProperty()->ShallowCopy(multiLineTextProp);
104     textMapperR->GetTextProperty()->SetJustificationToRight();
105     textMapperR->GetTextProperty()->SetVerticalJustificationToBottom();
106     textMapperR->GetTextProperty()->SetColor(0, 0, 1);
107     vtkActor2D *textActorR = vtkActor2D::New();
108     textActorR->SetMapper(textMapperR);
109     textActorR->GetPositionCoordinate()->SetCoordinateSystemToNormalizedDisplay();
110     textActorR->GetPositionCoordinate()->SetValue(0.95, 0.5);
111 
112     //Draw the grid to demonstrate the placement of the text.
113 
114     //Set up the necessary points.
115     vtkPoints *Pts = vtkPoints::New();
116     Pts->InsertNextPoint(0.05, 0.0, 0.0);
117     Pts->InsertNextPoint(0.05, 1.0, 0.0);
118     Pts->InsertNextPoint(0.5, 0.0, 0.0);
119     Pts->InsertNextPoint(0.5, 1.0, 0.0);
120     Pts->InsertNextPoint(0.95, 0.0, 0.0);
121     Pts->InsertNextPoint(0.95, 1.0, 0.0);
122     Pts->InsertNextPoint(0.0, 0.5, 0.0);
123     Pts->InsertNextPoint(1.0, 0.5, 0.0);
124     Pts->InsertNextPoint(0.00, 0.85, 0.0);
125     Pts->InsertNextPoint(0.50, 0.85, 0.0);
126     Pts->InsertNextPoint(0.00, 0.75, 0.0);
127     Pts->InsertNextPoint(0.50, 0.75, 0.0);
128     Pts->InsertNextPoint(0.00, 0.65, 0.0);
129     Pts->InsertNextPoint(0.50, 0.65, 0.0);
130 
131     //Set up the lines that use these points.
132     int i;
133     static vtkIdType m_pts[7][2] = { { 0, 1 },{ 2, 3 },{ 4, 5 },{ 6, 7 },{ 8, 9 },
134         { 10, 11 } ,{ 12, 13 } };
135     vtkCellArray *Lines = vtkCellArray::New();
136     for (i = 0; i < 7; i++) Lines->InsertNextCell(2, m_pts[i]);
137 
138     //Create a grid that uses these points and lines.
139     vtkPolyData *Grid = vtkPolyData::New();
140     Grid->SetPoints(Pts); 
141     Grid->SetLines(Lines);
142 
143     //Set up the coordinate system.
144     vtkCoordinate *normCoords = vtkCoordinate::New();
145     normCoords->SetCoordinateSystemToNormalizedViewport();
146 
147     //Set up the mapper and actor (2D) for the grid.
148     vtkPolyDataMapper2D *mapper = vtkPolyDataMapper2D::New();
149     mapper->SetInputData(Grid);
150     mapper->SetTransformCoordinate(normCoords);
151     vtkActor2D *gridActor = vtkActor2D::New();
152     gridActor->SetMapper(mapper);
153     gridActor->GetProperty()->SetColor(0.1, 0.1, 0.1);
154 
155     //Create the Renderer, RenderWindow, and RenderWindowInteractor
156     vtkRenderer *ren1 = vtkRenderer::New();
157     vtkRenderWindow *renWin = vtkRenderWindow::New();
158     renWin->AddRenderer(ren1);
159     vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
160     iren->SetRenderWindow(renWin);
161 
162     //Add the actors to the renderer; set the background and size; zoom in
163     // closer to the image; render
164     ren1->AddActor2D(textActorL);
165     ren1->AddActor2D(textActorC);
166     ren1->AddActor2D(textActorR);
167     ren1->AddActor2D(singleLineTextActorB);
168     ren1->AddActor2D(singleLineTextActorC);
169     ren1->AddActor2D(singleLineTextActorT);
170     ren1->AddActor2D(gridActor);
171 
172     ren1->SetBackground(1, 1, 1);
173     renWin->SetSize(500, 300);
174     ren1->GetActiveCamera()->Zoom(1.5);
175     renWin->Render();
176     iren->Start();
177 
178     singleLineTextProp->Delete();
179     multiLineTextProp->Delete();
180     singleLineTextB->Delete();
181     singleLineTextActorB->Delete();
182     singleLineTextC->Delete();
183     singleLineTextActorC->Delete();
184     singleLineTextT->Delete();
185     singleLineTextActorT->Delete();
186     textMapperL->Delete();
187     textActorL->Delete();
188     textMapperC->Delete();
189     textActorC->Delete();
190     textMapperR->Delete();
191     textActorR->Delete();
192     Pts->Delete();
193     Lines->Delete();
194     Grid->Delete();
195     normCoords->Delete();
196     mapper->Delete();
197     gridActor->Delete();
198     ren1->Delete();
199     renWin->Delete();
200     iren->Delete();
201 
202     singleLineTextProp = NULL;
203     multiLineTextProp = NULL;
204     singleLineTextB = NULL;
205     singleLineTextActorB = NULL;
206     singleLineTextC = NULL;
207     singleLineTextActorC = NULL;
208     singleLineTextT = NULL;
209     singleLineTextActorT = NULL;
210     textMapperL = NULL;
211     textActorL = NULL;
212     textMapperC = NULL;
213     textActorC = NULL;
214     textMapperR = NULL;
215     textActorR = NULL;
216     Pts = NULL;
217     Lines = NULL;
218     Grid = NULL;
219     normCoords = NULL;
220     mapper = NULL;
221     gridActor = NULL;
222     ren1 = NULL;
223     renWin = NULL;
224     iren = NULL;
225 
226     return 0;
227 }
posted on 2017-11-28 17:08 湘水亭长阅读(696) 评论(0) 编辑收藏举报