primStream Class Reference

#include <primitiveStream.h>

Public Member Functions
	primStream (Int sizeLengths, Int sizeVertices)
	~primStream ()
Int	get_n_prims ()
Int	get_type (Int i)
Int	get_length (Int i)
Real *	get_vertices ()
void	begin ()
void	insert (Real u, Real v)
void	insert (Real v[2])
void	end (Int type)
Int	num_triangles ()
void	triangle (Real A[2], Real B[2], Real C[2])
void	print ()
void	draw ()

Private Attributes
Int *	lengths
Int *	types
Real *	vertices
Int	index_lengths
Int	size_lengths
Int	index_vertices
Int	size_vertices
Int	counter

Detailed Description

Definition at line 44 of file primitiveStream.h.

Constructor & Destructor Documentation

primStream::primStream	(	Int	sizeLengths,
		Int	sizeVertices
	)

Definition at line 145 of file primitiveStream.cc.

{
  lengths = (Int*)malloc (sizeof(Int) * sizeLengths);
  assert(lengths);
  types = (Int*)malloc (sizeof(Int) * sizeLengths);
  assert(types);
  
  vertices = (Real*) malloc(sizeof(Real) * sizeVertices);
  assert(vertices);
  
  index_lengths = 0;
  index_vertices = 0;
  size_lengths = sizeLengths;
  size_vertices = sizeVertices; 

  counter = 0; 
}

primStream::~primStream

(

)

Definition at line 163 of file primitiveStream.cc.

{
  free(lengths);
  free(types);
  free(vertices);
}

Member Function Documentation

void primStream::begin

(

)

Definition at line 62 of file primitiveStream.cc.

Referenced by gridBoundaryChain::leftEndFan(), reflexChain::outputFan(), gridWrap::outputFanWithPoint(), reflexChain::processNewVertex(), gridBoundaryChain::rightEndFan(), sampleLeftSingleTrimEdgeRegion(), sampleLeftSingleTrimEdgeRegionGen(), triangle(), triangulateXYMono(), and triangulateXYMonoTB().

{
  counter = 0;
}

void primStream::draw

(

)

Definition at line 170 of file primitiveStream.cc.

{
  Int i,j,k;
  k=0;
  for(i=0; i<index_lengths; i++)
    {
      switch(types[i]){
      case PRIMITIVE_STREAM_FAN:
    glBegin(GL_TRIANGLE_FAN);
    break;
      case PRIMITIVE_STREAM_STRIP:
    glBegin(GL_TRIANGLE_STRIP);
    break;
      }
      
      for(j=0; j<lengths[i]; j++){
    glVertex2fv(vertices+k);
    k += 2;
      }
      glEnd();
    }
}

void primStream::end

(

Int

type

)

Definition at line 93 of file primitiveStream.cc.

Referenced by gridBoundaryChain::leftEndFan(), reflexChain::outputFan(), gridWrap::outputFanWithPoint(), reflexChain::processNewVertex(), gridBoundaryChain::rightEndFan(), sampleLeftSingleTrimEdgeRegion(), sampleLeftSingleTrimEdgeRegionGen(), triangle(), triangulateXYMono(), and triangulateXYMonoTB().

{
  Int i;
  /*if there is no vertex in this primitive, 
   *nothing needs to be done
   */
  if(counter == 0) return ;

  if(index_lengths >= size_lengths){
    Int* temp = (Int*) malloc(sizeof(Int) * (2*size_lengths + 2));
    assert(temp);
    Int* tempTypes = (Int*) malloc(sizeof(Int) * (2*size_lengths + 2));
    assert(tempTypes);
    
    /*copy*/
    for(i=0; i<index_lengths; i++){
      temp[i] = lengths[i];
      tempTypes[i] = types[i];
    }
    
    free(lengths);
    free(types);
    lengths = temp;
    types = tempTypes;
    size_lengths = 2*size_lengths + 2;
  }
  lengths[index_lengths] = counter;
  types[index_lengths] = type;
  index_lengths++;
}

Int primStream::get_length ( Int  i )

inline

Definition at line 73 of file primitiveStream.h.

Referenced by Slicer::evalStream().

    {
      return lengths[i];
    }

Int primStream::get_n_prims ( )

inline

Definition at line 65 of file primitiveStream.h.

Referenced by Slicer::evalStream().

    {
      return index_lengths;
    }

Int primStream::get_type ( Int  i )

inline

Definition at line 69 of file primitiveStream.h.

Referenced by Slicer::evalStream().

    {
      return  types[i];
    }

Real* primStream::get_vertices ( )

inline

Definition at line 77 of file primitiveStream.h.

Referenced by Slicer::evalStream().

{return vertices;}

void primStream::insert	(	Real	u,
		Real	v
	)

Definition at line 67 of file primitiveStream.cc.

Referenced by gridBoundaryChain::leftEndFan(), reflexChain::outputFan(), gridWrap::outputFanWithPoint(), reflexChain::processNewVertex(), gridBoundaryChain::rightEndFan(), sampleLeftSingleTrimEdgeRegion(), sampleLeftSingleTrimEdgeRegionGen(), triangle(), triangulateXYMono(), and triangulateXYMonoTB().

{
  /*if the space cannot hold u and v,
   *we have to expand the array
   */
  if(index_vertices+1 >= size_vertices) {
    Real* temp = (Real*) malloc (sizeof(Real) * (2*size_vertices + 2));
    assert(temp);
    
    /*copy*/
    for(Int i=0; i<index_vertices; i++)
      temp[i] = vertices[i];
    
    free(vertices);
    vertices = temp;
    size_vertices = 2*size_vertices + 2;
  }

  vertices[index_vertices++] = u;
  vertices[index_vertices++] = v;
  counter++;
}

void primStream::insert ( Real  v[2] )

inline

Definition at line 84 of file primitiveStream.h.

Referenced by insert().

{insert(v[0], v[1]);}

Int primStream::num_triangles

(

)

Definition at line 46 of file primitiveStream.cc.

Referenced by Slicer::slice_new().

{
  Int i;
  Int ret=0;
  for(i=0; i<index_lengths; i++)
    {
      ret += lengths[i]-2;
    }
  return ret;
}

void primStream::print

(

void

)

Definition at line 124 of file primitiveStream.cc.

{
  Int i,j,k;
  printf("index_lengths=%i,size_lengths=%i\n", index_lengths, size_lengths);
  printf("index_vertices=%i,size_vertices=%i\n", index_vertices, size_vertices);
  k=0;
  for(i=0; i<index_lengths; i++)
    {
      if(types[i] == PRIMITIVE_STREAM_FAN)
    printf("primitive-FAN:\n");
      else 
    printf("primitive-STRIP:\n");
      for(j=0; j<lengths[i]; j++)
    {
      printf("(%f,%f) ", vertices[k], vertices[k+1]);
      k += 2;     
    }
      printf("\n");
    }
}

void primStream::triangle ( Real  A[2], Real  B[2], Real  C[2]  )

inline

Definition at line 89 of file primitiveStream.h.

Referenced by monoTriangulation2(), and monoTriangulationRecGenTBOpt().

    {
      begin();
      insert(A);
      insert(B);
      insert(C);
      end(PRIMITIVE_STREAM_FAN);
    }

Member Data Documentation

Int primStream::counter

private

Definition at line 59 of file primitiveStream.h.

Referenced by end().

Int primStream::index_lengths

private

Definition at line 50 of file primitiveStream.h.

Referenced by draw(), end(), get_n_prims(), num_triangles(), primStream(), and print().

Int primStream::index_vertices

private

Definition at line 52 of file primitiveStream.h.

Referenced by insert(), primStream(), and print().

Int* primStream::lengths

private

Definition at line 45 of file primitiveStream.h.

Int primStream::size_lengths

private

Definition at line 51 of file primitiveStream.h.

Referenced by end(), primStream(), and print().

Int primStream::size_vertices

private

Definition at line 53 of file primitiveStream.h.

Referenced by insert(), primStream(), and print().

Int* primStream::types

private

Definition at line 46 of file primitiveStream.h.

Real* primStream::vertices

private

Definition at line 47 of file primitiveStream.h.

Referenced by draw(), get_vertices(), insert(), primStream(), print(), and ~primStream().

---

The documentation for this class was generated from the following files:

• dll/opengl/glu32/src/libnurbs/nurbtess/primitiveStream.h
• dll/opengl/glu32/src/libnurbs/nurbtess/primitiveStream.cc