Version 5.6.0. The vtkConstrainedPointWidget2 class displays the possible constraint axis.

Author: Charles PIGNEROL

cmake/version.cmake

@@ -3,7 +3,7 @@
 #
 
 set (VTK_CONTRIB_MAJOR_VERSION "5")
-set (VTK_CONTRIB_MINOR_VERSION "5")
+set (VTK_CONTRIB_MINOR_VERSION "6")
 set (VTK_CONTRIB_RELEASE_VERSION "0")
 set (VTK_CONTRIB_VERSION ${VTK_CONTRIB_MAJOR_VERSION}.${VTK_CONTRIB_MINOR_VERSION}.${VTK_CONTRIB_RELEASE_VERSION})
 

src/VtkContrib/public/VtkContrib/vtkConstrainedPointWidget2.h

@@ -7,6 +7,7 @@
 #ifndef VTK_CONSTRAINED_POINT_WIDGET_2_H
 #define VTK_CONSTRAINED_POINT_WIDGET_2_H
 
+#include <vtkActor.h>
 #include <vtkHandleWidget.h>
 #include <vtkSphereHandleRepresentation.h>
 
@@ -48,6 +49,14 @@ class vtkConstrainedPointWidget2 : public vtkHandleWidget
 	 */
 	virtual void OnChar ( );
 
+ 
+	protected :
+	
+	/**
+	 * Masque l'éventuel axe de contrainte affiché.
+	 */
+	virtual void EndInteraction ( );
+ 
 
 	private :
 
@@ -96,6 +105,13 @@ class vtkConstrainedPointHandleRepresentation2 : public vtkSphereHandleRepresent
 	 * @param	Nouvel axe de contrainte de déplacement (0 -> X, 1 -> Y, 2 -> Z, autre => déplacement dans le plan de l'écran).
 	 */
 	virtual void SetConstraintAxis (int axis);
+	
+	/**
+	 * Affiche/Masque une droite représentant l'axe de contrainte.
+	 */
+	virtual void DisplayConstraintAxis (bool onOff);
+	virtual bool DisplayConstraintAxis ( )
+	{ return _displayConstraintAxis; }
 
 
 	private :
@@ -115,6 +131,12 @@ class vtkConstrainedPointHandleRepresentation2 : public vtkSphereHandleRepresent
 	 */
 	vtkConstrainedPointHandleRepresentation2 (const vtkConstrainedPointHandleRepresentation2&);
 	vtkConstrainedPointHandleRepresentation2& operator = (const vtkConstrainedPointHandleRepresentation2&);
+
+	/** Faut-il afficher l'axe de contrainte ? */
+	bool						_displayConstraintAxis;
+
+	/** L'éventuel acteur représentant l'axe de contrainte. */
+	vtkActor*					_constraintAxisActor;
 };	// class vtkConstrainedPointHandleRepresentation2
 
 

src/VtkContrib/vtkConstrainedPointWidget2.cpp

@@ -1,7 +1,10 @@
 #include "VtkContrib/vtkConstrainedPointWidget2.h"
 
 #include <vtkCellPicker.h>
+#include <vtkLineSource.h>
+#include <vtkPolyDataMapper.h>
 #include <vtkRenderer.h>
+#include <vtkRenderWindow.h>
 #include <vtkRenderWindowInteractor.h>
 
 #include <assert.h>
@@ -66,7 +69,7 @@ vtkConstrainedPointHandleRepresentation2* vtkConstrainedPointWidget2::GetConstra
 void vtkConstrainedPointWidget2::OnChar ( )
 {
 	if ((0 != this->Interactor) && (0 != GetConstrainedPointRepresentation ( )))
-	{
+	{	    
 		switch (this->Interactor->GetKeyCode ( ))
 		{
 			case ' '	: GetConstrainedPointRepresentation ( )->SetConstraintAxis (-1);	break;
@@ -82,18 +85,27 @@ void vtkConstrainedPointWidget2::OnChar ( )
 }	// vtkConstrainedPointWidget2::OnChar
 
 
+void vtkConstrainedPointWidget2::EndInteraction ( )
+{
+	if (0 != GetConstrainedPointRepresentation ( ))
+		GetConstrainedPointRepresentation ( )->SetConstraintAxis (-1);
+		
+	vtkHandleWidget::EndInteraction ( );
+}	// vtkConstrainedPointWidget2::EndInteraction
+
+
 // =============================================================================
 //              LA CLASSE vtkConstrainedPointHandleRepresentation2
 // =============================================================================
 
 vtkConstrainedPointHandleRepresentation2::vtkConstrainedPointHandleRepresentation2 ( )
-	: vtkSphereHandleRepresentation ( )
+	: vtkSphereHandleRepresentation ( ), _displayConstraintAxis (false), _constraintAxisActor (0)
 {
 }	// vtkConstrainedPointHandleRepresentation2::vtkConstrainedPointHandleRepresentation2
 
 
 vtkConstrainedPointHandleRepresentation2::vtkConstrainedPointHandleRepresentation2 (const vtkConstrainedPointHandleRepresentation2&)
-	: vtkSphereHandleRepresentation ( )
+	: vtkSphereHandleRepresentation ( ), _displayConstraintAxis (false), _constraintAxisActor (0)
 {
 	assert (0 && "vtkConstrainedPointHandleRepresentation2 copy constructor is not allowed.");
 }	// vtkConstrainedPointHandleRepresentation2::vtkConstrainedPointHandleRepresentation2
@@ -108,6 +120,7 @@ vtkConstrainedPointHandleRepresentation2& vtkConstrainedPointHandleRepresentatio
 
 vtkConstrainedPointHandleRepresentation2::~vtkConstrainedPointHandleRepresentation2 ( )
 {
+	
 }	// vtkConstrainedPointHandleRepresentation2::~vtkConstrainedPointHandleRepresentation2
 
 
@@ -159,6 +172,10 @@ void vtkConstrainedPointHandleRepresentation2::WidgetInteraction (double eventPo
 
 void vtkConstrainedPointHandleRepresentation2::SetConstraintAxis (int axis)
 {
+	const	bool	displayConstraintAxis	= _displayConstraintAxis;
+	if ((0 != GetConstrained ( )) && (axis != this->ConstraintAxis))
+		DisplayConstraintAxis (false);
+		
 	this->ConstraintAxis	= axis;
 	switch (axis)
 	{
@@ -170,6 +187,77 @@ void vtkConstrainedPointHandleRepresentation2::SetConstraintAxis (int axis)
 		default	:
 			ConstrainedOff ( );
 	}	// switch (axis)
+	
+	if (true == displayConstraintAxis)
+		DisplayConstraintAxis (true);
 }	// vtkConstrainedPointHandleRepresentation2::SetConstraintAxis
 
 
+void vtkConstrainedPointHandleRepresentation2::DisplayConstraintAxis (bool onOff)
+{
+	if ((true == onOff) && (0 != _constraintAxisActor))
+		return;
+	_displayConstraintAxis	= onOff;
+	
+	if ((true == onOff) && (0 <= this->ConstraintAxis) && (2 >= this->ConstraintAxis))
+	{
+		// Le point courrant :
+		double	pos [3]	= { 0., 0., 0. };
+		GetWorldPosition (pos);
+		
+		// L'univers :
+		double	bounds [6]	= { DBL_MAX, -DBL_MAX, DBL_MAX, -DBL_MAX, DBL_MAX, -DBL_MAX };
+		double	dx			= 0., dy	= 0., dz	= 0.;
+		if (0 != this->Renderer)
+		{
+			this->Renderer->ComputeVisiblePropBounds (bounds);
+			dx	= bounds [1] - bounds [0];
+			dy	= bounds [3] - bounds [2];
+			dz	= bounds [5] - bounds [4];
+		}	// if (0 != this->Renderer)
+
+		vtkLineSource*	line	= vtkLineSource::New ( );
+		vtkPoints*		points	= vtkPoints::New ( );
+		points->Initialize ( );
+		switch (this->ConstraintAxis)
+		{
+			case 0	:
+				line->SetPoint1 (bounds [0] - dx, pos [1], pos [2]);
+				line->SetPoint2 (bounds [1] + dx, pos [1], pos [2]);
+				break;
+			case 1	:
+				line->SetPoint1 (pos [0], bounds [2] - dy, pos [2]);
+				line->SetPoint2 (pos [0], bounds [3] + dy, pos [2]);
+				break;
+			case 2	:
+				line->SetPoint1 (pos [0], pos [1], bounds [4] - dz);
+				line->SetPoint2 (pos [0], pos [1], bounds [5] + dz);
+				break;
+		}	// switch (this->ConstraintAxis)
+		vtkPolyDataMapper*	mapper	= vtkPolyDataMapper::New ( );
+		mapper->SetInputConnection (line->GetOutputPort ( ));
+		mapper->ScalarVisibilityOff ( );
+		assert (0 == _constraintAxisActor);
+		_constraintAxisActor	= vtkActor::New ( );
+		_constraintAxisActor->SetProperty (this->GetSelectedProperty ( ));	// => couleur de la sphère lors des interactions
+		_constraintAxisActor->SetMapper (mapper);
+		if (0 != this->Renderer)
+		{
+			this->Renderer->AddActor (_constraintAxisActor);
+			if (0 != this->Renderer->GetRenderWindow ( ))
+				this->Renderer->GetRenderWindow ( )->Render ( );
+		}
+		line->Delete ( );
+		mapper->Delete ( );
+	}	// if ((true == onOff) && (0 <= this->ConstraintAxis) && (2 >= this->ConstraintAxis))
+	else
+	{
+		if (0 != _constraintAxisActor)
+		{
+			if (0 != this->Renderer)
+				this->Renderer->RemoveActor (_constraintAxisActor);
+			_constraintAxisActor->Delete ( );
+		}	// if (0 != _constraintAxisActor)
+		_constraintAxisActor	= 0;
+	}	// else if ((true == onOff) && (0 <= this->ConstraintAxis) && (2 >= this->ConstraintAxis))
+}	// vtkConstrainedPointHandleRepresentation2::DisplayConstraintAxis

src/tests/point_widget2.cpp

@@ -85,6 +85,7 @@ int main ( int argc, char *argv[] )
 	double	bounds [6]	= { 0., 2., -1., 1., -1., 1. };
 	vtkSmartPointer<vtkConstrainedPointWidget2> handleWidget = vtkSmartPointer<vtkConstrainedPointWidget2>::New();
 	handleWidget->GetRepresentation ( );
+	handleWidget->GetConstrainedPointRepresentation ( )->DisplayConstraintAxis (true);
 	handleWidget->SetInteractor(iren);
 //	handleWidget->GetRepresentation ( )->SetPlaceFactor (2.5);
 	handleWidget->GetRepresentation ( )->SetPlaceFactor (1.);

versions.txt

@@ -1,3 +1,9 @@
+Version 5.6.0 : 05/07/24
+===============
+
+La classe vtkConstrainedPointWidget2 permet d'afficher l'�ventuel axe de contrainte utilis�.
+
+
 Version 5.5.0 : 26/06/24
 ===============