ENH: Let user turn ON/OFF collision detection

In many laptops, the algorithm eats up a lot of RAM and freezes the computer for some seconds. So disable it by default, and only turn it on actively by the user, so that he sees why this is happening.

In some cases, we do not want to calculate collisions, just to play around and show functionality as well as quickly visually see where there might be collisions. Once beam angle is decided, we can activate numerical collision detection, and get more accurate results.

Author: ferdymercury

RoomsEyeView/Logic/vtkMRMLRoomsEyeViewNode.cxx

@@ -72,7 +72,7 @@ vtkMRMLNodeNewMacro(vtkMRMLRoomsEyeViewNode);
 vtkMRMLRoomsEyeViewNode::vtkMRMLRoomsEyeViewNode()
   : PatientBodySegmentID(nullptr)
   , TreatmentMachineDescriptorFilePath(nullptr)
-  , CollisionDetectionEnabled(true)
+  , CollisionDetectionEnabled(false)
   , GantryRotationAngle(0.0)
   , CollimatorRotationAngle(0.0)
   , ImagingPanelMovement(-68.50)

RoomsEyeView/Resources/UI/qSlicerRoomsEyeViewModule.ui

@@ -258,7 +258,7 @@
       <item row="2" column="0" colspan="3">
        <widget class="QLabel" name="CollisionDetectionStatusLabel">
         <property name="text">
-         <string>No collisions detected.</string>
+         <string>Collision computation disabled</string>
         </property>
        </widget>
       </item>
@@ -278,14 +278,21 @@
         </property>
        </spacer>
       </item>
-      <item row="0" column="0">
+      <item row="0" column="0" colspan="2">
+       <widget class="QCheckBox" name="ActivateCollisionComputationCheckBox">
+        <property name="text">
+         <string>Enable computation</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="0">
        <widget class="QLabel" name="label_7">
         <property name="text">
          <string>Patient body:</string>
         </property>
        </widget>
       </item>
-      <item row="0" column="1">
+      <item row="1" column="1">
        <widget class="qMRMLSegmentSelectorWidget" name="SegmentSelectorWidget_PatientBody" native="true">
         <property name="noneEnabled" stdset="0">
          <bool>true</bool>

RoomsEyeView/qSlicerRoomsEyeViewModuleWidget.cxx

@@ -392,6 +392,9 @@ void qSlicerRoomsEyeViewModuleWidget::setup()
   // 3D camera control
   connect(d->FixedCameraCheckBox, SIGNAL(toggled(bool)), this, SLOT(setFixedReferenceCameraEnabled(bool)));
 
+  // Collision detection control
+  connect(d->ActivateCollisionComputationCheckBox, SIGNAL(toggled(bool)), this, SLOT(setCollisionComputationEnabled(bool)));
+
   // Disable treatment machine geometry controls until a machine is loaded
   d->GantryRotationSlider->setEnabled(false);
   d->CollimatorRotationSlider->setEnabled(false);
@@ -400,7 +403,7 @@ void qSlicerRoomsEyeViewModuleWidget::setup()
   d->LongitudinalTableTopDisplacementSlider->setEnabled(false);
   d->LateralTableTopDisplacementSlider->setEnabled(false);
   d->ImagingPanelMovementSlider->setEnabled(false);
-
+  
   // Handle scene change event if occurs
   qvtkConnect(d->logic(), vtkCommand::ModifiedEvent, this, SLOT(onLogicModified()));
 }
@@ -1004,7 +1007,7 @@ void qSlicerRoomsEyeViewModuleWidget::checkForCollisions()
   Q_D(qSlicerRoomsEyeViewModuleWidget);
 
   vtkMRMLRoomsEyeViewNode* paramNode = vtkMRMLRoomsEyeViewNode::SafeDownCast(d->MRMLNodeComboBox_ParameterSet->currentNode());
-  if (!paramNode || !d->ModuleWindowInitialized)
+  if (!paramNode || !d->ModuleWindowInitialized|| !paramNode->GetCollisionDetectionEnabled())
   {
     return;
   }
@@ -1093,3 +1096,14 @@ void qSlicerRoomsEyeViewModuleWidget::setFixedReferenceCameraEnabled(bool toggle
   }
   cameraNode->SetAndObserveTransformNodeID(nullptr);
 }
+
+//-----------------------------------------------------------------------------
+void qSlicerRoomsEyeViewModuleWidget::setCollisionComputationEnabled(bool toggled)
+{
+  Q_D(qSlicerRoomsEyeViewModuleWidget);
+  vtkMRMLRoomsEyeViewNode* paramNode = vtkMRMLRoomsEyeViewNode::SafeDownCast(d->MRMLNodeComboBox_ParameterSet->currentNode());
+  paramNode->SetCollisionDetectionEnabled(toggled);
+  QString collisionsMessage(toggled ? tr("Collision computation enabled") : tr("Collision computation disabled"));
+  d->CollisionDetectionStatusLabel->setText(collisionsMessage);
+  d->CollisionDetectionStatusLabel->setStyleSheet("color: black");
+}

RoomsEyeView/qSlicerRoomsEyeViewModuleWidget.h

@@ -68,6 +68,7 @@ public slots:
   void updateTreatmentOrientationMarker();
 
   void setFixedReferenceCameraEnabled(bool);
+  void setCollisionComputationEnabled(bool);
 
 protected slots:
   void onLoadTreatmentMachineButtonClicked();