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cxCameraStyleForView.cpp
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1 /*=========================================================================
2 This file is part of CustusX, an Image Guided Therapy Application.
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32 
33 #include "cxCameraStyleForView.h"
34 
35 #include <vtkRenderer.h>
36 #include <vtkCamera.h>
37 
38 #include "cxTrackingService.h"
39 #include "cxToolRep3D.h"
40 #include "cxView.h"
41 #include "boost/bind.hpp"
42 #include <vtkRenderWindow.h>
43 #include "vtkInteractorStyleUnicam.h"
44 #include "vtkInteractorStyleTrackballCamera.h"
45 #include "cxCoreServices.h"
46 #include "cxViewportListener.h"
47 
48 #include "cxTool.h"
49 #include <vtkRenderWindowInteractor.h>
50 #include "cxPatientModelService.h"
51 #include "cxRepContainer.h"
52 #include "cxLogger.h"
53 
54 SNW_DEFINE_ENUM_STRING_CONVERTERS_BEGIN(cx, CAMERA_STYLE_TYPE, cstCOUNT)
55 {
56  "DEFAULT_STYLE",
57  "TOOL_STYLE",
58  "ANGLED_TOOL_STYLE",
59  "UNICAM_STYLE"
60 }
61 SNW_DEFINE_ENUM_STRING_CONVERTERS_END(cx, CAMERA_STYLE_TYPE, cstCOUNT)
62 
63 namespace cx
64 {
65 
66 CameraStyleForView::CameraStyleForView(CoreServicesPtr backend) :
67  mCameraStyleForView(cstDEFAULT_STYLE),
68  mBlockCameraUpdate(false),
69  mBackend(backend)
70 {
71  mViewportListener.reset(new ViewportListener);
72  mViewportListener->setCallback(boost::bind(&CameraStyleForView::viewportChangedSlot, this));
73 
74  mPreRenderListener.reset(new ViewportPreRenderListener);
75  mPreRenderListener->setCallback(boost::bind(&CameraStyleForView::onPreRender, this));
76 
77  connect(mBackend->tracking().get(), SIGNAL(activeToolChanged(const QString&)), this, SLOT(activeToolChangedSlot()));
78 }
79 
81 {
82  this->disconnectTool();
83  mView = widget;
84  this->connectTool();
85 }
86 
87 
88 ViewPtr CameraStyleForView::getView() const
89 {
90  return mView;
91 }
92 
93 void CameraStyleForView::viewportChangedSlot()
94 {
95  if (mBlockCameraUpdate)
96  return;
97  this->updateCamera();
98 }
99 
100 void CameraStyleForView::onPreRender()
101 {
102  if (mFollowingTool)
103  this->moveCameraToolStyleSlot(mFollowingTool->get_prMt(), mFollowingTool->getTimestamp());
104 }
105 
106 ToolRep3DPtr CameraStyleForView::getToolRep() const
107 {
108  if (!this->getView())
109  return ToolRep3DPtr();
110 
111  ToolRep3DPtr rep = RepContainer(this->getView()->getReps()).findFirst<ToolRep3D>(mFollowingTool);
112  return rep;
113 }
114 
115 vtkRendererPtr CameraStyleForView::getRenderer() const
116 {
117  if (!this->getView())
118  return vtkRendererPtr();
119  return this->getView()->getRenderer();
120 }
121 
122 vtkCameraPtr CameraStyleForView::getCamera() const
123 {
124  if (!this->getRenderer())
125  return vtkCameraPtr();
126  return this->getRenderer()->GetActiveCamera();
127 }
128 
129 void CameraStyleForView::setModified()
130 {
131  mPreRenderListener->setModified();
132 }
133 
134 void CameraStyleForView::updateCamera()
135 {
136  this->setModified();
137 }
138 
139 void CameraStyleForView::moveCameraToolStyleSlot(Transform3D prMt, double timestamp)
140 {
141  if (mCameraStyleForView == cstDEFAULT_STYLE)
142  return;
143  if (!mFollowingTool)
144  return;
145 
146 
147  vtkCameraPtr camera = this->getCamera();
148  if (!camera)
149  return;
150 
151  Transform3D rMpr = mBackend->patient()->get_rMpr();
152 
153  Transform3D rMt = rMpr * prMt;
154 
155  double offset = mFollowingTool->getTooltipOffset();
156 
157  double cameraOffset = camera->GetDistance();
158 
159 // std::cout << "cameraOffset pre " << cameraOffset << std::endl;
160 // std::cout << "rMt\n" << rMt << std::endl;
161  Vector3D camera_r = rMt.coord(Vector3D(0, 0, offset - cameraOffset));
162  Vector3D focus_r = rMt.coord(Vector3D(0, 0, offset));
163 // std::cout << "cameraOffset ppost " << (focus_r-camera_r).length() << std::endl;
164  Vector3D vup_r = rMt.vector(Vector3D(-1, 0, 0));
165  if (mCameraStyleForView == cstANGLED_TOOL_STYLE)
166  {
167  // elevate 20*, but keep distance
168  double height = cameraOffset * tan(20 / 180.0 * M_PI);
169  camera_r += vup_r * height;
170  Vector3D elevated = camera_r + vup_r * height;
171  Vector3D n_foc2eye = (elevated - focus_r).normalized();
172  camera_r = focus_r + cameraOffset * n_foc2eye;
173  }
174 
175  Vector3D pos_old(camera->GetPosition());
176  Vector3D focus_old(camera->GetFocalPoint());
177  Vector3D vup_old(camera->GetViewUp());
178 
179  if (similar(pos_old, camera_r, 0.1) && similar(focus_old, focus_r, 0.1) && similar(vup_old, vup_r,0.1 ))
180  return; // break update loop: this event is triggered by camera change.
181 
182 // std::cout << "pos " << pos_old << " to " << camera_r << std::endl;
183 // std::cout << "foc " << focus_old << " to " << focus_r << std::endl;
184 
185  mBlockCameraUpdate = true;
186  camera->SetPosition(camera_r.begin());
187  camera->SetFocalPoint(focus_r.begin());
188  camera->SetViewUp(vup_r.begin());
189  camera->SetClippingRange(1, std::max<double>(1000, cameraOffset * 1.5));
190  mBlockCameraUpdate = false;
191 }
192 
193 void CameraStyleForView::activeToolChangedSlot()
194 {
195  ToolPtr newTool = mBackend->tracking()->getActiveTool();
196  if (newTool == mFollowingTool)
197  return;
198 
199  this->disconnectTool();
200  this->connectTool();
201 }
202 
203 bool CameraStyleForView::isToolFollowingStyle(CAMERA_STYLE_TYPE style) const
204 {
205  return ( style==cstTOOL_STYLE )||( style==cstANGLED_TOOL_STYLE);
206 }
207 
208 void CameraStyleForView::connectTool()
209 {
210  if (!this->isToolFollowingStyle(mCameraStyleForView))
211  return;
212 
213  mFollowingTool = mBackend->tracking()->getActiveTool();
214 
215  if (!mFollowingTool)
216  return;
217 
218  if (!this->getView())
219  return;
220 
221  connect(mFollowingTool.get(), SIGNAL(toolTransformAndTimestamp(Transform3D, double)), this,
222  SLOT(setModified()));
223 
224  ToolRep3DPtr rep = this->getToolRep();
225  if (rep)
226  {
227  rep->setOffsetPointVisibleAtZeroOffset(true);
228  if (mCameraStyleForView == cstTOOL_STYLE)
229  rep->setStayHiddenAfterVisible(true);
230  }
231 
232  mViewportListener->startListen(this->getRenderer());
233  mPreRenderListener->startListen(this->getRenderer());
234 
235  this->updateCamera();
236 
237  report("Camera is following " + mFollowingTool->getName());
238 }
239 
240 void CameraStyleForView::disconnectTool()
241 {
242  if (mCameraStyleForView == cstDEFAULT_STYLE)
243  return;
244 
245  mViewportListener->stopListen();
246  mPreRenderListener->stopListen();
247 
248  if (mFollowingTool)
249  {
250  disconnect(mFollowingTool.get(), SIGNAL(toolTransformAndTimestamp(Transform3D, double)), this,
251  SLOT(setModified()));
252 
253  ToolRep3DPtr rep = this->getToolRep();
254  if (rep)
255  rep->setStayHiddenAfterVisible(false);
256  }
257 
258  mFollowingTool.reset();
259 }
260 
261 void CameraStyleForView::setCameraStyle(CAMERA_STYLE_TYPE style)
262 {
263  if (mCameraStyleForView == style)
264  return;
265 
266  this->disconnectTool();
267 
268  ViewPtr view = this->getView();
269  if (!view)
270  return;
271  vtkRenderWindowInteractor* interactor = view->getRenderWindow()->GetInteractor();
272 
273  switch (style)
274  {
275  case cstDEFAULT_STYLE:
276  case cstTOOL_STYLE:
278  interactor->SetInteractorStyle(vtkInteractorStyleTrackballCameraPtr::New());
279  break;
280  case cstUNICAM_STYLE:
281  interactor->SetInteractorStyle(vtkInteractorStyleUnicamPtr::New());
282  default:
283  break;
284  };
285 
286  mCameraStyleForView = style;
287 
288  this->connectTool();
289 }
290 
292 {
293  return mCameraStyleForView;
294 }
295 
296 }//namespace cx
Transform3D Transform3D
Transform3D is a representation of an affine 3D transform.
boost::shared_ptr< class View > ViewPtr
cstTOOL_STYLE
Definition: cxViewService.h:61
cstDEFAULT_STYLE
Definition: cxViewService.h:61
bool similar(const DoubleBoundingBox3D &a, const DoubleBoundingBox3D &b, double tol)
Listens to changes in viewport and camera matrix.
vtkSmartPointer< class vtkRenderer > vtkRendererPtr
cstANGLED_TOOL_STYLE
Definition: cxViewService.h:61
void setView(ViewPtr widget)
SNW_DEFINE_ENUM_STRING_CONVERTERS_BEGIN(cx, CAMERA_STYLE_TYPE, cstCOUNT)
Eigen::Vector3d Vector3D
Vector3D is a representation of a point or vector in 3D.
Definition: cxVector3D.h:63
void report(QString msg)
Definition: cxLogger.cpp:90
boost::shared_ptr< class CoreServices > CoreServicesPtr
Definition: cxCameraStyle.h:59
cstUNICAM_STYLE
Definition: cxViewService.h:61
Listens to the start render event in a vtkRenderer.
boost::shared_ptr< class ToolRep3D > ToolRep3DPtr
void setCameraStyle(CAMERA_STYLE_TYPE style)
CAMERA_STYLE_TYPE getCameraStyle()
SNW_DEFINE_ENUM_STRING_CONVERTERS_END(cx, ORIENTATION_TYPE, otCOUNT)
#define M_PI
vtkSmartPointer< class vtkCamera > vtkCameraPtr
boost::shared_ptr< class Tool > ToolPtr