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SoTessellated Class Reference

#include <SoTessellated.h>

Inheritance diagram for SoTessellated:
Collaboration diagram for SoTessellated:

Public Member Functions

void addTriangularFacet (double x1, double y1, double z1, double x2, double y2, double z2, double x3, double y3, double z3)
 
void addQuadrangularFacet (double x1, double y1, double z1, double x2, double y2, double z2, double x3, double y3, double z3, double x4, double y4, double z4)
 
void finalize ()
 
 SoTessellated ()
 
virtual void generateAlternateRep ()
 
virtual void clearAlternateRep ()
 

Static Public Member Functions

static void initClass ()
 

Public Attributes

SoSFBool drawEdgeLines
 
SoSFBool forceEdgeLinesInBaseColour
 
SoSFNode alternateRep
 

Protected Member Functions

virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)
 
virtual void generatePrimitives (SoAction *action)
 
virtual ~SoTessellated ()
 

Private Member Functions

 SO_NODE_HEADER (SoTessellated)
 
void setupDefaultPoints ()
 

Private Attributes

std::vector< float > m_points
 
std::vector< float > m_normals
 
SbBox3f m_bbox
 
SbVec3f m_center
 

Detailed Description

Definition at line 23 of file SoTessellated.h.

Constructor & Destructor Documentation

◆ SoTessellated()

SoTessellated::SoTessellated ( )

Definition at line 28 of file SoTessellated.cxx.

29 {
30  SO_NODE_CONSTRUCTOR(SoTessellated);
31  SO_NODE_ADD_FIELD(drawEdgeLines, (false));
32  SO_NODE_ADD_FIELD(forceEdgeLinesInBaseColour, (true));
33  SO_NODE_ADD_FIELD(alternateRep,(NULL));
34  setNodeType(EXTENSION);
35 }

◆ ~SoTessellated()

SoTessellated::~SoTessellated ( )
protectedvirtual

Definition at line 38 of file SoTessellated.cxx.

39 {
40 }

Member Function Documentation

◆ addQuadrangularFacet()

void SoTessellated::addQuadrangularFacet ( double  x1,
double  y1,
double  z1,
double  x2,
double  y2,
double  z2,
double  x3,
double  y3,
double  z3,
double  x4,
double  y4,
double  z4 
)

Definition at line 71 of file SoTessellated.cxx.

75 {
76  addTriangularFacet(x1,y1,z1,x2,y2,z2,x3,y3,z3);
77  addTriangularFacet(x3,y3,z3,x4,y4,z4,x1,y1,z1);
78 }

◆ addTriangularFacet()

void SoTessellated::addTriangularFacet ( double  x1,
double  y1,
double  z1,
double  x2,
double  y2,
double  z2,
double  x3,
double  y3,
double  z3 
)

Definition at line 43 of file SoTessellated.cxx.

46 {
47  m_points.push_back(x1);
48  m_points.push_back(y1);
49  m_points.push_back(z1);
50  m_points.push_back(x2);
51  m_points.push_back(y2);
52  m_points.push_back(z2);
53  m_points.push_back(x3);
54  m_points.push_back(y3);
55  m_points.push_back(z3);
56 
57  // Normal (v2-v1)(x)(v3-v1)
58  const double edge1X(x2-x1), edge1Y(y2-y1), edge1Z(z2-z1);
59  const double edge2X(x3-x1), edge2Y(y3-y1), edge2Z(z3-z1);
60  double nx(edge1Y*edge2Z-edge1Z*edge2Y);
61  double ny(edge1Z*edge2X-edge1X*edge2Z);
62  double nz(edge1X*edge2Y-edge1Y*edge2X);
63  double nl(nx*nx+ny*ny+nz*nz);
64  const double s(1.0/sqrt(nl));
65  m_normals.push_back(nx*s);
66  m_normals.push_back(ny*s);
67  m_normals.push_back(nz*s);
68 }

◆ clearAlternateRep()

void SoTessellated::clearAlternateRep ( )
virtual

Definition at line 250 of file SoTessellated.cxx.

251 {
252  alternateRep.setValue(NULL);
253 }

◆ computeBBox()

void SoTessellated::computeBBox ( SoAction *  action,
SbBox3f &  box,
SbVec3f &  center 
)
protectedvirtual

Definition at line 188 of file SoTessellated.cxx.

188  {
189  if(m_points.size()==0)
190  setupDefaultPoints();
191  box = m_bbox;
192  center = m_center;
193 }

◆ finalize()

void SoTessellated::finalize ( )

Definition at line 81 of file SoTessellated.cxx.

82 {
83  if(m_points.size()==0)
84  setupDefaultPoints();
85 
86  //Bounding Box and Center
87  float xmin(m_points[0]), ymin(m_points[1]), zmin(m_points[2]);
88  float xmax(xmin), ymax(ymin), zmax(zmin);
89 
90  int nVertices = m_points.size()/3;
91  for (int i=1;i<nVertices;i++) {
92  xmin = std::min(xmin,m_points[i*3]);
93  xmax = std::max(xmax,m_points[i*3]);
94  ymin = std::min(ymin,m_points[i*3+1]);
95  ymax = std::max(ymax,m_points[i*3+1]);
96  zmin = std::min(zmin,m_points[i*3+2]);
97  zmax = std::max(zmax,m_points[i*3+2]);
98  }
99 
100  m_bbox.setBounds (xmin, ymin, zmin, xmax, ymax, zmax);
101  m_center.setValue(0.5*(xmin+xmax),0.5*(ymin+ymax),0.5*(zmin+zmax));
102 
103  drawEdgeLines.touch();
104 }

◆ generateAlternateRep()

void SoTessellated::generateAlternateRep ( )
virtual

Definition at line 196 of file SoTessellated.cxx.

197 {
198  if(m_points.size()==0)
199  setupDefaultPoints();
200  if (alternateRep.getValue())
201  clearAlternateRep();
202 
203  SoSeparator * sep = new SoSeparator;
204 
205  // Faceset representing the shape
206  SoVertexProperty* vertices = new SoVertexProperty();
207  for(size_t i=0;i<m_normals.size();++i)
208  vertices->vertex.set1Value(i,m_points[i*3+0],m_points[i*3+1],m_points[i*3+2]);
209  SoIndexedFaceSet* faceset = new SoIndexedFaceSet;
210  int j=0;
211  for(size_t i=0;i<m_normals.size();++i) {
212  faceset->coordIndex.set1Value(j++,i);
213  if((i>1) && ((i-2)%3==0)) {
214  faceset->coordIndex.set1Value(j++,SO_END_FACE_INDEX);
215  }
216  }
217 
218  faceset->vertexProperty = vertices;
219  sep->addChild(faceset);
220 
221  // Lineset representing the outline
222  //
223  // -- ToDo: this can be optimizid. We are currently drawing edges twice
224  // -- and we could also eliminate 'diagonal' lines coming from
225  // -- quadrangular shapes
226  //
227  if (drawEdgeLines.getValue()) {
228  SoVertexProperty* verticesL = new SoVertexProperty();
229  SoIndexedLineSet* lineset = new SoIndexedLineSet;
230  int kk=0, jj=0;
231  for(size_t i=0;i<m_points.size()-9;i+=9) {
232  verticesL->vertex.set1Value(kk,m_points[i],m_points[i+1],m_points[i+2]);
233  lineset->coordIndex.set1Value(jj++,kk++);
234  verticesL->vertex.set1Value(kk,m_points[i+3],m_points[i+4],m_points[i+5]);
235  lineset->coordIndex.set1Value(jj++,kk++);
236  verticesL->vertex.set1Value(kk,m_points[i+6],m_points[i+7],m_points[i+8]);
237  lineset->coordIndex.set1Value(jj++,kk++);
238  verticesL->vertex.set1Value(kk,m_points[i],m_points[i+1],m_points[i+2]);
239  lineset->coordIndex.set1Value(jj++,kk++);
240  lineset->coordIndex.set1Value(jj++,SO_END_LINE_INDEX);
241  }
242  lineset->vertexProperty = verticesL;
243  sep->addChild(lineset);
244  }
245 
246  alternateRep.setValue(sep);
247 }

◆ generatePrimitives()

void SoTessellated::generatePrimitives ( SoAction *  action)
protectedvirtual

Definition at line 108 of file SoTessellated.cxx.

109 {
110  if(m_points.size()==0)
111  setupDefaultPoints();
112 
113  // Access the state from the action
114  SoState *state = action->getState();
115 
116  if(action->getTypeId().isDerivedFrom(SoPickAction::getClassTypeId())) {
117 
118  //For picking:
119  SoPrimitiveVertex vertex;
120  beginShape(action,TRIANGLES);
121  for(size_t i=0;i<m_points.size();i+=3) {
122  vertex.setPoint(SbVec3f(m_points[i],m_points[i+1],m_points[i+2]));
123  shapeVertex(&vertex);
124  }
125  endShape();
126 
127  }else{
128 
129  // Draw the shape itself
130  glBegin(GL_TRIANGLES);
131  int nFaces = m_normals.size()/3;
132  for (int i=0;i<nFaces;i++) {
133  glNormal3fv((const GLfloat*)&m_normals[i*3]);
134  for (int j = 0; j < 3; j++)
135  glVertex3fv((const GLfloat*)&m_points[i*9+j*3]);
136  }
137  glEnd();
138 
139  // Draw edges if required
140  //
141  // -- ToDo: this can be optimizid. We are currently drawing edges twice
142  // -- and we could also eliminate 'diagonal' lines coming from
143  // -- quadrangular shapes
144  //
145  if(drawEdgeLines.getValue()){
146  const bool disableLighting(forceEdgeLinesInBaseColour.getValue()&&glIsEnabled(GL_LIGHTING));
147  const bool transparencyOn = glIsEnabled(GL_BLEND);
148 
149  if (disableLighting) glDisable(GL_LIGHTING);
150  if (transparencyOn) glDisable(GL_BLEND);
151 
152  for(size_t i=0;i<m_points.size()-9;i+=9) {
153  glBegin(GL_LINE_STRIP);
154  glVertex3fv((const GLfloat*)&m_points[i]);
155  glVertex3fv((const GLfloat*)&m_points[i+3]);
156  glVertex3fv((const GLfloat*)&m_points[i+6]);
157  glVertex3fv((const GLfloat*)&m_points[i]);
158  glEnd();
159  }
160 
161  if (disableLighting) glEnable(GL_LIGHTING);
162  if (transparencyOn) glEnable(GL_BLEND);
163  }
164  }
165 
166  if (state&&state->isElementEnabled(SoGLCacheContextElement::getClassStackIndex())) {
167  //Encourage auto caching
168  SoGLCacheContextElement::shouldAutoCache(state, SoGLCacheContextElement::DO_AUTO_CACHE);
169 #if ((COIN_MAJOR_VERSION>=3)||((COIN_MAJOR_VERSION==2)&&(COIN_MINOR_VERSION>=5)))
170  SoGLCacheContextElement::incNumShapes(state);
171 #endif
172  }
173 
174 }

◆ initClass()

void SoTessellated::initClass ( )
static

Definition at line 19 of file SoTessellated.cxx.

20 {
21  [[maybe_unused]] static const bool didInit = [&]() {
22  SO_NODE_INIT_CLASS(SoTessellated, SoShape, "Shape");
23  return true;
24  }();
25 }

◆ setupDefaultPoints()

void SoTessellated::setupDefaultPoints ( )
private

Definition at line 177 of file SoTessellated.cxx.

178 {
179  double targetSize = 100.;
180  addTriangularFacet(-targetSize,-targetSize,0.,targetSize,-targetSize,0.,0.,0.,targetSize);
181  addTriangularFacet(targetSize,-targetSize,0.,targetSize,targetSize,0.,0.,0.,targetSize);
182  addTriangularFacet(targetSize,targetSize,0.,-targetSize,targetSize,0.,0.,0.,targetSize);
183  addTriangularFacet(-targetSize,targetSize,0.,-targetSize,-targetSize,0.,0.,0.,targetSize);
184  addQuadrangularFacet(-targetSize,-targetSize,0.,-targetSize,targetSize,0.,targetSize,targetSize,0.,targetSize,-targetSize,0.);
185 }

◆ SO_NODE_HEADER()

SoTessellated::SO_NODE_HEADER ( SoTessellated  )
private

Member Data Documentation

◆ alternateRep

SoSFNode SoTessellated::alternateRep

Definition at line 33 of file SoTessellated.h.

◆ drawEdgeLines

SoSFBool SoTessellated::drawEdgeLines

Definition at line 31 of file SoTessellated.h.

◆ forceEdgeLinesInBaseColour

SoSFBool SoTessellated::forceEdgeLinesInBaseColour

Definition at line 32 of file SoTessellated.h.

◆ m_bbox

SbBox3f SoTessellated::m_bbox
private

Definition at line 74 of file SoTessellated.h.

◆ m_center

SbVec3f SoTessellated::m_center
private

Definition at line 75 of file SoTessellated.h.

◆ m_normals

std::vector<float> SoTessellated::m_normals
private

Definition at line 73 of file SoTessellated.h.

◆ m_points

std::vector<float> SoTessellated::m_points
private

Definition at line 72 of file SoTessellated.h.

The documentation for this class was generated from the following files:
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SoTessellated::addTriangularFacet
void addTriangularFacet(double x1, double y1, double z1, double x2, double y2, double z2, double x3, double y3, double z3)
Definition: SoTessellated.cxx:43
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SoTessellated::m_center
SbVec3f m_center
Definition: SoTessellated.h:75
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