1 // Copyright (C) 2007-2012 CEA/DEN, EDF R&D, OPEN CASCADE
3 // Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
4 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
6 // This library is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU Lesser General Public
8 // License as published by the Free Software Foundation; either
9 // version 2.1 of the License.
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // Lesser General Public License for more details.
16 // You should have received a copy of the GNU Lesser General Public
17 // License along with this library; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
23 #include "VTKViewer_Utilities.h"
24 #include "VTKViewer_Actor.h"
25 #include "VTKViewer_Algorithm.h"
31 #include <vtkCamera.h>
32 #include <vtkRenderer.h>
33 #include <vtkRenderWindow.h>
35 /*!@see vtkRenderer::ResetCamera(vtkFloatingPointType bounds[6]) method*/
37 ResetCamera(vtkRenderer* theRenderer,
38 int theUsingZeroFocalPoint)
43 vtkCamera* aCamera = theRenderer->GetActiveCamera();
47 vtkFloatingPointType aBounds[6];
48 int aCount = ComputeVisiblePropBounds(theRenderer,aBounds);
50 if(theUsingZeroFocalPoint || aCount){
51 static vtkFloatingPointType MIN_DISTANCE = 1.0 / VTK_LARGE_FLOAT;
53 vtkFloatingPointType aLength = aBounds[1]-aBounds[0];
54 aLength = std::max((aBounds[3]-aBounds[2]),aLength);
55 aLength = std::max((aBounds[5]-aBounds[4]),aLength);
57 if(aLength < MIN_DISTANCE)
60 vtkFloatingPointType aWidth =
61 sqrt((aBounds[1]-aBounds[0])*(aBounds[1]-aBounds[0]) +
62 (aBounds[3]-aBounds[2])*(aBounds[3]-aBounds[2]) +
63 (aBounds[5]-aBounds[4])*(aBounds[5]-aBounds[4]));
65 if(aWidth < MIN_DISTANCE)
68 vtkFloatingPointType aViewPlaneNormal[3];
69 aCamera->GetViewPlaneNormal(aViewPlaneNormal);
71 vtkFloatingPointType aCenter[3] = {0.0, 0.0, 0.0};
72 if(!theUsingZeroFocalPoint){
73 aCenter[0] = (aBounds[0] + aBounds[1])/2.0;
74 aCenter[1] = (aBounds[2] + aBounds[3])/2.0;
75 aCenter[2] = (aBounds[4] + aBounds[5])/2.0;
77 aCamera->SetFocalPoint(aCenter[0],aCenter[1],aCenter[2]);
79 vtkFloatingPointType aViewAngle = aCamera->GetViewAngle();
80 vtkFloatingPointType aDistance = 2.0*aWidth/tan(aViewAngle*vtkMath::Pi()/360.0);
82 // check view-up vector against view plane normal
83 vtkFloatingPointType aViewUp[3];
84 aCamera->GetViewUp(aViewUp);
85 if(fabs(vtkMath::Dot(aViewUp,aViewPlaneNormal)) > 0.999)
86 aCamera->SetViewUp(-aViewUp[2], aViewUp[0], aViewUp[1]);
89 aCamera->SetPosition(aCenter[0]+aDistance*aViewPlaneNormal[0],
90 aCenter[1]+aDistance*aViewPlaneNormal[1],
91 aCenter[2]+aDistance*aViewPlaneNormal[2]);
93 // find size of the window
94 int* aWinSize = theRenderer->GetSize();
95 if(aWinSize[0] < aWinSize[1])
96 aWidth *= vtkFloatingPointType(aWinSize[1])/vtkFloatingPointType(aWinSize[0]);
98 if(theUsingZeroFocalPoint)
101 aCamera->SetParallelScale(aWidth/2.0);
104 ResetCameraClippingRange(theRenderer);
107 /*! Compute the bounds of the visible props*/
109 ComputeVisiblePropBounds(vtkRenderer* theRenderer,
110 vtkFloatingPointType theBounds[6])
114 theBounds[0] = theBounds[2] = theBounds[4] = VTK_LARGE_FLOAT;
115 theBounds[1] = theBounds[3] = theBounds[5] = -VTK_LARGE_FLOAT;
117 // loop through all props
118 VTK::ActorCollectionCopy aCopy(theRenderer->GetActors());
119 vtkActorCollection* aCollection = aCopy.GetActors();
120 aCollection->InitTraversal();
121 while (vtkActor* aProp = aCollection->GetNextActor()) {
122 // if it's invisible, or has no geometry, we can skip the rest
123 if(aProp->GetVisibility() && aProp->GetMapper() && vtkMath::AreBoundsInitialized(aProp->GetBounds())){
124 if(VTKViewer_Actor* anActor = VTKViewer_Actor::SafeDownCast(aProp))
125 if(anActor->IsInfinitive())
128 vtkFloatingPointType *aBounds = aProp->GetBounds();
129 static vtkFloatingPointType MAX_DISTANCE = 0.9*VTK_LARGE_FLOAT;
130 // make sure we haven't got bogus bounds
131 if ( aBounds != NULL &&
132 aBounds[0] > -MAX_DISTANCE && aBounds[1] < MAX_DISTANCE &&
133 aBounds[2] > -MAX_DISTANCE && aBounds[3] < MAX_DISTANCE &&
134 aBounds[4] > -MAX_DISTANCE && aBounds[5] < MAX_DISTANCE )
138 theBounds[0] = std::min(aBounds[0],theBounds[0]);
139 theBounds[2] = std::min(aBounds[2],theBounds[2]);
140 theBounds[4] = std::min(aBounds[4],theBounds[4]);
142 theBounds[1] = std::max(aBounds[1],theBounds[1]);
143 theBounds[3] = std::max(aBounds[3],theBounds[3]);
144 theBounds[5] = std::max(aBounds[5],theBounds[5]);
152 /*!@see vtkRenderer::ResetCameraClippingRange(vtkFloatingPointType bounds[6]) method*/
154 ResetCameraClippingRange(vtkRenderer* theRenderer)
156 if(!theRenderer || !theRenderer->VisibleActorCount()) return;
158 vtkCamera* anActiveCamera = theRenderer->GetActiveCamera();
159 if( anActiveCamera == NULL ){
163 // Find the plane equation for the camera view plane
164 vtkFloatingPointType vn[3];
165 anActiveCamera->GetViewPlaneNormal(vn);
166 vtkFloatingPointType position[3];
167 anActiveCamera->GetPosition(position);
169 vtkFloatingPointType bounds[6];
170 theRenderer->ComputeVisiblePropBounds(bounds);
172 vtkFloatingPointType center[3];
173 center[0] = (bounds[0] + bounds[1])/2.0;
174 center[1] = (bounds[2] + bounds[3])/2.0;
175 center[2] = (bounds[4] + bounds[5])/2.0;
177 vtkFloatingPointType width = sqrt((bounds[1]-bounds[0])*(bounds[1]-bounds[0]) +
178 (bounds[3]-bounds[2])*(bounds[3]-bounds[2]) +
179 (bounds[5]-bounds[4])*(bounds[5]-bounds[4]));
181 vtkFloatingPointType distance = sqrt((position[0]-center[0])*(position[0]-center[0]) +
182 (position[1]-center[1])*(position[1]-center[1]) +
183 (position[2]-center[2])*(position[2]-center[2]));
185 vtkFloatingPointType range[2] = {distance - width/2.0, distance + width/2.0};
187 // Do not let the range behind the camera throw off the calculation.
188 if (range[0] < 0.0) range[0] = 0.0;
190 anActiveCamera->SetClippingRange( range );
193 /*!Compute trihedron size.*/
195 ComputeTrihedronSize( vtkRenderer* theRenderer,
196 vtkFloatingPointType& theNewSize,
197 const vtkFloatingPointType theSize,
198 const vtkFloatingPointType theSizeInPercents )
200 // calculating diagonal of visible props of the renderer
201 vtkFloatingPointType bnd[ 6 ];
202 if ( ComputeVisiblePropBounds( theRenderer, bnd ) == 0 )
204 bnd[ 1 ] = bnd[ 3 ] = bnd[ 5 ] = 100;
205 bnd[ 0 ] = bnd[ 2 ] = bnd[ 4 ] = 0;
207 vtkFloatingPointType aLength = 0;
209 aLength = bnd[ 1 ]-bnd[ 0 ];
210 aLength = std::max( ( bnd[ 3 ] - bnd[ 2 ] ),aLength );
211 aLength = std::max( ( bnd[ 5 ] - bnd[ 4 ] ),aLength );
213 static vtkFloatingPointType EPS_SIZE = 5.0E-3;
214 theNewSize = aLength * theSizeInPercents / 100.0;
216 // if the new trihedron size have sufficient difference, then apply the value
217 return fabs( theNewSize - theSize) > theSize * EPS_SIZE ||
218 fabs( theNewSize-theSize ) > theNewSize * EPS_SIZE;
221 bool IsBBEmpty(vtkRenderer* theRenderer)
226 vtkFloatingPointType aNewBndBox[6];
227 aNewBndBox[ 0 ] = aNewBndBox[ 2 ] = aNewBndBox[ 4 ] = VTK_LARGE_FLOAT;
228 aNewBndBox[ 1 ] = aNewBndBox[ 3 ] = aNewBndBox[ 5 ] = -VTK_LARGE_FLOAT;
230 // iterate through displayed objects and set size if necessary
231 VTK::ActorCollectionCopy aCopy(theRenderer->GetActors());
232 vtkActorCollection* anActors = aCopy.GetActors();
233 anActors->InitTraversal();
235 while(vtkActor* anAct = anActors->GetNextActor())
236 //if(SALOME_Actor* anActor = dynamic_cast<SALOME_Actor*>(anAct))
237 if(VTKViewer_Actor* anActor = VTKViewer_Actor::SafeDownCast(anAct))
238 if(anActor->GetVisibility() && !anActor->IsInfinitive())
240 vtkFloatingPointType *aBounds = anActor->GetBounds();
241 if(aBounds[0] > -VTK_LARGE_FLOAT && aBounds[1] < VTK_LARGE_FLOAT &&
242 aBounds[2] > -VTK_LARGE_FLOAT && aBounds[3] < VTK_LARGE_FLOAT &&
243 aBounds[4] > -VTK_LARGE_FLOAT && aBounds[5] < VTK_LARGE_FLOAT)
250 bool ComputeBBCenter(vtkRenderer* theRenderer, vtkFloatingPointType theCenter[3])
252 theCenter[0] = theCenter[1] = theCenter[2] = 0.0;
257 vtkFloatingPointType aNewBndBox[6];
258 aNewBndBox[ 0 ] = aNewBndBox[ 2 ] = aNewBndBox[ 4 ] = VTK_LARGE_FLOAT;
259 aNewBndBox[ 1 ] = aNewBndBox[ 3 ] = aNewBndBox[ 5 ] = -VTK_LARGE_FLOAT;
261 // iterate through displayed objects and set size if necessary
262 VTK::ActorCollectionCopy aCopy(theRenderer->GetActors());
263 vtkActorCollection* anActors = aCopy.GetActors();
264 anActors->InitTraversal();
266 while(vtkActor* anAct = anActors->GetNextActor())
268 //if(SALOME_Actor* anActor = dynamic_cast<SALOME_Actor*>(anAct))
269 if(VTKViewer_Actor* anActor = VTKViewer_Actor::SafeDownCast(anAct))
271 if(anActor->GetVisibility() && !anActor->IsInfinitive())
273 vtkFloatingPointType *aBounds = anActor->GetBounds();
274 if(aBounds[0] > -VTK_LARGE_FLOAT && aBounds[1] < VTK_LARGE_FLOAT &&
275 aBounds[2] > -VTK_LARGE_FLOAT && aBounds[3] < VTK_LARGE_FLOAT &&
276 aBounds[4] > -VTK_LARGE_FLOAT && aBounds[5] < VTK_LARGE_FLOAT)
278 for(int i = 0; i < 5; i = i + 2){
279 if(aBounds[i] < aNewBndBox[i])
280 aNewBndBox[i] = aBounds[i];
281 if(aBounds[i+1] > aNewBndBox[i+1])
282 aNewBndBox[i+1] = aBounds[i+1];
292 // null bounding box => the center is (0,0,0)
296 if(aNewBndBox[0] > -VTK_LARGE_FLOAT && aNewBndBox[1] < VTK_LARGE_FLOAT &&
297 aNewBndBox[2] > -VTK_LARGE_FLOAT && aNewBndBox[3] < VTK_LARGE_FLOAT &&
298 aNewBndBox[4] > -VTK_LARGE_FLOAT && aNewBndBox[5] < VTK_LARGE_FLOAT)
300 static vtkFloatingPointType MIN_DISTANCE = 1.0 / VTK_LARGE_FLOAT;
302 vtkFloatingPointType aLength = aNewBndBox[1]-aNewBndBox[0];
303 aLength = std::max((aNewBndBox[3]-aNewBndBox[2]),aLength);
304 aLength = std::max((aNewBndBox[5]-aNewBndBox[4]),aLength);
306 if(aLength < MIN_DISTANCE)
309 vtkFloatingPointType aWidth =
310 sqrt((aNewBndBox[1]-aNewBndBox[0])*(aNewBndBox[1]-aNewBndBox[0]) +
311 (aNewBndBox[3]-aNewBndBox[2])*(aNewBndBox[3]-aNewBndBox[2]) +
312 (aNewBndBox[5]-aNewBndBox[4])*(aNewBndBox[5]-aNewBndBox[4]));
314 if(aWidth < MIN_DISTANCE)
317 theCenter[0] = (aNewBndBox[0] + aNewBndBox[1])/2.0;
318 theCenter[1] = (aNewBndBox[2] + aNewBndBox[3])/2.0;
319 theCenter[2] = (aNewBndBox[4] + aNewBndBox[5])/2.0;
326 vtkFloatingPointType aBounds[6];
327 int aCount = ComputeVisiblePropBounds(theRenderer,aBounds);
328 printf("aNewBndBox[0] = %f, aNewBndBox[1] = %f,\naNewBndBox[2] = %f, aNewBndBox[3] = %f,\naNewBndBox[4] = %f, aNewBndBox[5] = %f\n",
329 aBounds[0],aBounds[1],aBounds[2],aBounds[3],aBounds[4],aBounds[5]);
330 printf("aCount = %d\n",aCount);
333 static vtkFloatingPointType MIN_DISTANCE = 1.0 / VTK_LARGE_FLOAT;
335 vtkFloatingPointType aLength = aBounds[1]-aBounds[0];
336 aLength = max((aBounds[3]-aBounds[2]),aLength);
337 aLength = max((aBounds[5]-aBounds[4]),aLength);
339 if(aLength < MIN_DISTANCE)
342 vtkFloatingPointType aWidth =
343 sqrt((aBounds[1]-aBounds[0])*(aBounds[1]-aBounds[0]) +
344 (aBounds[3]-aBounds[2])*(aBounds[3]-aBounds[2]) +
345 (aBounds[5]-aBounds[4])*(aBounds[5]-aBounds[4]));
347 if(aWidth < MIN_DISTANCE)
350 theCenter[0] = (aBounds[0] + aBounds[1])/2.0;
351 theCenter[1] = (aBounds[2] + aBounds[3])/2.0;
352 theCenter[2] = (aBounds[4] + aBounds[5])/2.0;