OBJECT/GEOM_Actor.cxx

   1 //  GEOM OBJECT : interactive object for Geometry entities visualization
   2 //
   3 //  Copyright (C) 2003  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
   4 //  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
   5 //
   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.
  10 //
  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.
  15 //
  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
  19 //
  20 //  See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
  21 //
  22 //
  23 //
  24 //  File   : GEOM_Actor.cxx
  25 //  Author : Christophe ATTANASIO
  26 //  Module : GEOM
  27 //  $Header$
  28
  29 using namespace std;
  30 /*!
  31   \class GEOM_Actor GEOM_Actor.h
  32   \brief This class allows to display an OpenCASCADE CAD model in a VTK viewer.
  33 */
  34
  35 #include "GEOM_Actor.h"
  36
  37 // OpenCASCADE Includes
  38 #include "GEOM_OCCReader.h"
  39 #include <BRep_Tool.hxx>
  40
  41 //-------------------------------------------------------------
  42 // Main methods
  43 //-------------------------------------------------------------
  44
  45
  46 GEOM_Actor* GEOM_Actor::New()
  47 {
  48   // First try to create the object from the vtkObjectFactory
  49   vtkObject* ret = vtkObjectFactory::CreateInstance("GEOM_Actor");
  50   if(ret)
  51     {
  52       return (GEOM_Actor*)ret;
  53     }
  54   // If the factory was unable to create the object, then create it here.
  55   return new GEOM_Actor;
  56 }
  57
  58
  59 GEOM_Actor::GEOM_Actor()
  60 {
  61   this->Device = vtkActor::New();
  62
  63   this->WireframeMapper = NULL;
  64   this->ShadingMapper = NULL;
  65
  66   this->ShadingProperty = NULL;
  67   this->WireframeProperty = NULL;
  68
  69   this->deflection = 0;
  70   myDisplayMode = 0;
  71
  72   this->myIO = NULL;
  73   this->myName = "";
  74
  75   this->HighlightProperty = NULL;
  76   this->ishighlighted = false;
  77
  78   this->subshape = false;
  79 }
  80
  81 GEOM_Actor::~GEOM_Actor()
  82 {
  83   if (WireframeMapper != NULL)
  84     WireframeMapper->Delete();
  85   if (ShadingMapper != NULL)
  86     ShadingMapper->Delete();
  87   if (ShadingProperty != NULL)
  88     ShadingProperty->Delete();
  89   if (WireframeProperty != NULL)
  90     WireframeProperty->Delete();
  91   if (HighlightProperty != NULL)
  92     HighlightProperty->Delete();
  93 }
  94
  95
  96 void GEOM_Actor::ShallowCopy(vtkProp *prop)
  97 {
  98   GEOM_Actor *f = GEOM_Actor::SafeDownCast(prop);
  99   if ( f != NULL )
 100     {
 101       this->setInputShape(f->getTopo(),f->getDeflection(),f->getDisplayMode());
 102       this->setName( f->getName() );
 103       if ( f->hasIO() )
 104         this->setIO( f->getIO() );
 105       this->ShadingMapper = NULL;
 106       this->WireframeMapper = NULL;
 107     } else {
 108       this->myIO = NULL;
 109       this->myName = "";
 110       this->ShadingMapper = NULL;
 111       this->WireframeMapper = NULL;
 112     }
 113
 114   // Now do superclass
 115   this->SALOME_Actor::ShallowCopy(prop);
 116 }
 117
 118 //-------------------------------------------------------------
 119 // Set parameters
 120 //-------------------------------------------------------------
 121
 122
 123 void GEOM_Actor::setDisplayMode(int thenewmode) {
 124   myDisplayMode = thenewmode;
 125   if ( thenewmode >=1 ) {
 126     if ((myShape.ShapeType() == TopAbs_WIRE) ||
 127         (myShape.ShapeType() == TopAbs_EDGE) ||
 128         (myShape.ShapeType() == TopAbs_VERTEX)) {
 129       if ( !subshape )
 130         CreateWireframeMapper();
 131       else
 132         return;
 133     } else
 134       CreateShadingMapper();
 135   } else
 136     CreateWireframeMapper();
 137 }
 138
 139 void GEOM_Actor::setDeflection(double adef) {
 140   deflection = adef;
 141 }
 142
 143 void GEOM_Actor::setInputShape(const TopoDS_Shape& aShape,double adef,int imode) {
 144   myShape = aShape;
 145   deflection = adef;
 146   setDisplayMode(imode);
 147 }
 148
 149 //-------------------------------------------------------------
 150 // Get parameters
 151 //-------------------------------------------------------------
 152
 153 const TopoDS_Shape& GEOM_Actor::getTopo() {
 154   return myShape;
 155 }
 156
 157 double GEOM_Actor::getDeflection() {
 158   return deflection;
 159 }
 160
 161 void GEOM_Actor::SetWireframeProperty(vtkProperty* Prop) {
 162   this->WireframeProperty = Prop;
 163 }
 164
 165 void GEOM_Actor::SetShadingProperty(vtkProperty* Prop) {
 166   this->ShadingProperty = Prop;
 167 }
 168
 169
 170 //-------------------------------------------------------------
 171 // Mapper creating function
 172 //-------------------------------------------------------------
 173 void GEOM_Actor::CreateMapper(int theMode) {
 174   if(myShape.ShapeType() == TopAbs_VERTEX) {
 175     gp_Pnt aPnt = BRep_Tool::Pnt(TopoDS::Vertex(myShape));
 176     this->SetPosition(aPnt.X(),aPnt.Y(),aPnt.Z());
 177   }
 178   GEOM_OCCReader* aread = GEOM_OCCReader::New();
 179   aread->setTopo(myShape);
 180   aread->setDisplayMode(theMode);
 181   aread->GetOutput()->ReleaseDataFlagOn();
 182
 183   vtkPolyDataMapper* aMapper = vtkPolyDataMapper::New();
 184   if (theMode == 0) {
 185     aMapper->SetInput(aread->GetOutput());
 186   } else {
 187     vtkPolyDataNormals *normals = vtkPolyDataNormals::New();
 188     normals->SetInput(aread->GetOutput());
 189     aMapper->SetInput(normals->GetOutput());
 190   }
 191   aread->Delete();
 192   this->SetMapper(theMode == 0? WireframeMapper = aMapper : ShadingMapper = aMapper);
 193 }
 194
 195 void GEOM_Actor::CreateShadingMapper() {
 196   CreateMapper(1);
 197 }
 198
 199
 200 void GEOM_Actor::CreateWireframeMapper() {
 201   CreateMapper(0);
 202 }
 203
 204 //-------------------------------------------------------------
 205 // Render function
 206 //-------------------------------------------------------------
 207
 208 void GEOM_Actor::Render(vtkRenderer *ren, vtkMapper *Mapper)
 209 {
 210   /* render the property */
 211   if (!this->Property) {
 212     // force creation of a property
 213     this->GetProperty();
 214     this->Property->SetInterpolation(1);
 215     this->Property->SetRepresentationToSurface();
 216     this->Property->SetAmbient(0.3);
 217     this->Property->SetAmbientColor(0.88,0.86,0.2);
 218     this->Property->SetDiffuseColor(0.99,0.7,0.21);
 219     this->Property->SetSpecularColor(0.99,0.98,0.83);
 220   }
 221
 222   if(!ishighlighted) {
 223     if(myDisplayMode >= 1) {
 224       // SHADING
 225       this->Property = ShadingProperty;
 226     }
 227     else {
 228       this->Property = WireframeProperty;
 229     }
 230
 231     if ( ispreselected )
 232       this->Property = PreviewProperty;
 233   }
 234
 235   this->Property->Render(this, ren);
 236   if (this->BackfaceProperty) {
 237     this->BackfaceProperty->BackfaceRender(this, ren);
 238     this->Device->SetBackfaceProperty(this->BackfaceProperty);
 239   }
 240   this->Device->SetProperty(this->Property);
 241   // Store information on time it takes to render.
 242   // We might want to estimate time from the number of polygons in mapper.
 243   if(myDisplayMode >= 1) {
 244     if((myShape.ShapeType() == TopAbs_WIRE) ||
 245        (myShape.ShapeType() == TopAbs_EDGE) ||
 246        (myShape.ShapeType() == TopAbs_VERTEX)) {
 247       if ( !subshape ) {
 248         if(WireframeMapper==NULL) CreateWireframeMapper();
 249       } else
 250         return;
 251     }
 252     else {
 253       if(ShadingMapper==NULL) CreateShadingMapper();
 254     }
 255   }
 256   else {
 257     if(WireframeMapper==NULL) CreateWireframeMapper();
 258   }
 259   if(myShape.ShapeType() == TopAbs_VERTEX) {
 260     if(ren){
 261       //The parameter determine size of vertex actor relate to diagonal of RendererWindow
 262       static float delta = 0.01;
 263       float X1 = -1, Y1 = -1, Z1 = 0;
 264       ren->ViewToWorld(X1,Y1,Z1);
 265       float X2 = +1, Y2 = +1, Z2 = 0;
 266       ren->ViewToWorld(X2,Y2,Z2);
 267       Z2 = sqrt((X2-X1)*(X2-X1) + (Y2-Y1)*(Y2-Y1) + (Z2-Z1)*(Z2-Z1));
 268       this->SetScale(Z2*delta);
 269     }
 270     vtkMatrix4x4 *aMatrix = vtkMatrix4x4::New();
 271     this->GetMatrix(ren->GetActiveCamera(), aMatrix);
 272     this->Device->SetUserMatrix(aMatrix);
 273     this->Device->Render(ren,this->Mapper);
 274     aMatrix->Delete();
 275   } else
 276     this->Device->Render(ren, this->Mapper);
 277   this->EstimatedRenderTime = WireframeMapper->GetTimeToDraw();
 278 }
 279
 280 // SubShape
 281 void GEOM_Actor::SubShapeOn()
 282 {
 283   subshape = true;
 284 }
 285 void GEOM_Actor::SubShapeOff()
 286 {
 287   subshape = false;
 288 }
 289
 290 //-------------------------------------------------------------
 291 // Opacity methods
 292 //-------------------------------------------------------------
 293
 294 void GEOM_Actor::SetOpacity(float opa)
 295 {
 296   //HighlightProperty->SetOpacity(opa);
 297   SALOME_Actor::SetOpacity(opa);
 298   ShadingProperty->SetOpacity(opa);
 299 }
 300
 301 float GEOM_Actor::GetOpacity() {
 302   return ShadingProperty->GetOpacity();
 303 }
 304
 305 //-------------------------------------------------------------
 306 // Color methods
 307 //-------------------------------------------------------------
 308 void GEOM_Actor::SetColor(float r,float g,float b) {
 309   ShadingProperty->SetColor(r,g,b);
 310 }
 311
 312 void GEOM_Actor::GetColor(float& r,float& g,float& b) {
 313   float color[3];
 314    ShadingProperty->GetColor(color);
 315    r = color[0];
 316    g = color[1];
 317    b = color[2];
 318 }
 319
 320 //-------------------------------------------------------------
 321 // Highlight methods
 322 //-------------------------------------------------------------
 323
 324 void GEOM_Actor::highlight(Standard_Boolean highlight) {
 325
 326   if(highlight && !ishighlighted) {
 327     ishighlighted=true;
 328     // build highlight property is necessary
 329     if(HighlightProperty==NULL) {
 330       HighlightProperty = vtkProperty::New();
 331       HighlightProperty->SetAmbient(0.5);
 332       HighlightProperty->SetDiffuse(0.3);
 333       HighlightProperty->SetSpecular(0.2);
 334       HighlightProperty->SetRepresentationToSurface();
 335       HighlightProperty->SetAmbientColor(1, 1, 1);
 336       HighlightProperty->SetDiffuseColor(1, 1, 1);
 337       HighlightProperty->SetSpecularColor(0.5, 0.5, 0.5);
 338     }
 339
 340     this->Property = HighlightProperty;
 341
 342   }
 343   else if (!highlight) {
 344     if(ishighlighted) {
 345       ishighlighted=false;
 346       if(myDisplayMode==1) {
 347         //unhilight in shading
 348         this->Property = ShadingProperty;
 349       }
 350       else {
 351         //unhilight in wireframe
 352         this->Property = WireframeProperty;
 353       }
 354     }
 355   }
 356 }
 357
 358 bool GEOM_Actor::hasHighlight()
 359 {
 360   return true;
 361 }
 362
 363 void GEOM_Actor::SetHighlightProperty(vtkProperty* Prop) {
 364   this->HighlightProperty = Prop;
 365 }
 366
 367
 368 void GEOM_Actor::ReleaseGraphicsResources(vtkWindow *renWin)
 369 {
 370   vtkActor::ReleaseGraphicsResources(renWin);
 371
 372   // broadcast the message down to the individual LOD mappers
 373
 374   if(WireframeMapper) this->WireframeMapper->ReleaseGraphicsResources(renWin);
 375   if(ShadingMapper) this->ShadingMapper->ReleaseGraphicsResources(renWin);
 376 }
 377
 378
 379 // Copy the follower's composite 4x4 matrix into the matrix provided.
 380 void GEOM_Actor::GetMatrix(vtkCamera* theCam, vtkMatrix4x4 *result)
 381 {
 382   double *pos, *vup;
 383   double Rx[3], Ry[3], Rz[3], p1[3];
 384   vtkMatrix4x4 *matrix = vtkMatrix4x4::New();
 385   int i;
 386   double distance;
 387
 388   this->GetOrientation();
 389   this->Transform->Push();
 390   this->Transform->PostMultiply();
 391   this->Transform->Identity();
 392
 393   // apply user defined matrix last if there is one
 394   if (this->UserMatrix)
 395     {
 396     this->Transform->Concatenate(this->UserMatrix);
 397     }
 398
 399   this->Transform->Translate(-this->Origin[0],
 400                              -this->Origin[1],
 401                              -this->Origin[2]);
 402   // scale
 403   this->Transform->Scale(this->Scale[0],
 404                          this->Scale[1],
 405                          this->Scale[2]);
 406
 407   // rotate
 408   this->Transform->RotateY(this->Orientation[1]);
 409   this->Transform->RotateX(this->Orientation[0]);
 410   this->Transform->RotateZ(this->Orientation[2]);
 411
 412   if (theCam)
 413     {
 414     // do the rotation
 415     // first rotate y
 416     pos = theCam->GetPosition();
 417     vup = theCam->GetViewUp();
 418
 419     if (theCam->GetParallelProjection())
 420       {
 421       theCam->GetDirectionOfProjection(Rz);
 422       }
 423     else
 424       {
 425       distance = sqrt(
 426         (pos[0] - this->Position[0])*(pos[0] - this->Position[0]) +
 427         (pos[1] - this->Position[1])*(pos[1] - this->Position[1]) +
 428         (pos[2] - this->Position[2])*(pos[2] - this->Position[2]));
 429       for (i = 0; i < 3; i++)
 430         {
 431         Rz[i] = (pos[i] - this->Position[i])/distance;
 432         }
 433       }
 434
 435     vtkMath::Cross(vup,Rz,Rx);
 436     vtkMath::Normalize(Rx);
 437     vtkMath::Cross(Rz,Rx,Ry);
 438
 439     matrix->Element[0][0] = Rx[0];
 440     matrix->Element[1][0] = Rx[1];
 441     matrix->Element[2][0] = Rx[2];
 442     matrix->Element[0][1] = Ry[0];
 443     matrix->Element[1][1] = Ry[1];
 444     matrix->Element[2][1] = Ry[2];
 445     matrix->Element[0][2] = Rz[0];
 446     matrix->Element[1][2] = Rz[1];
 447     matrix->Element[2][2] = Rz[2];
 448
 449     this->Transform->Concatenate(matrix);
 450     }
 451
 452   // translate to projection reference point PRP
 453   // this is the camera's position blasted through
 454   // the current matrix
 455   p1[0] = this->Origin[0] + this->Position[0];
 456   p1[1] = this->Origin[1] + this->Position[1];
 457   p1[2] = this->Origin[2] + this->Position[2];
 458
 459   this->Transform->Translate(p1[0],p1[1],p1[2]);
 460   this->Transform->GetMatrix(result);
 461
 462   matrix->Delete();
 463   this->Transform->Pop();
 464 }