List of all members.
Classes |
struct | NewVertex |
struct | Prim |
struct | Vec3d |
Public Types |
enum | WindingType {
TESS_WINDING_ODD = GLU_TESS_WINDING_ODD,
TESS_WINDING_NONZERO = GLU_TESS_WINDING_NONZERO,
TESS_WINDING_POSITIVE = GLU_TESS_WINDING_POSITIVE,
TESS_WINDING_NEGATIVE = GLU_TESS_WINDING_NEGATIVE,
TESS_WINDING_ABS_GEQ_TWO = GLU_TESS_WINDING_ABS_GEQ_TWO
} |
enum | TessellationType { TESS_TYPE_GEOMETRY,
TESS_TYPE_DRAWABLE,
TESS_TYPE_POLYGONS
} |
typedef std::vector< osg::Vec3 * > | VertexPointList |
typedef std::vector
< osg::ref_ptr< Prim > > | PrimList |
Public Member Functions |
| Tessellator () |
| ~Tessellator () |
void | setBoundaryOnly (const bool tt) |
bool | getBoundaryOnly () |
void | setWindingType (const WindingType wt) |
WindingType | getWindingType () |
void | setTessellationType (const TessellationType tt) |
TessellationType | getTessellationType () |
void | retessellatePolygons (osg::Geometry &cxgeom) |
void | setTessellationNormal (const osg::Vec3 norm) |
osg::Geometry::PrimitiveSetList | getContours () |
void | beginTessellation () |
void | beginContour () |
void | addVertex (osg::Vec3 *vertex) |
void | endContour () |
void | endTessellation () |
PrimList & | getPrimList () |
void | reset () |
Protected Types |
typedef std::map< osg::Vec3
*, unsigned int > | VertexPtrToIndexMap |
typedef std::vector< NewVertex > | NewVertexList |
typedef std::vector< Vec3d * > | Vec3dList |
Protected Member Functions |
void | reduceArray (osg::Array *cold, const unsigned int nnu) |
void | collectTessellation (osg::Geometry &cxgeom, unsigned int originalIndex) |
void | addContour (GLenum mode, unsigned int first, unsigned int last, osg::Vec3Array *vertices) |
void | addContour (osg::PrimitiveSet *primitive, osg::Vec3Array *vertices) |
void | handleNewVertices (osg::Geometry &geom, VertexPtrToIndexMap &vertexPtrToIndexMap) |
void | begin (GLenum mode) |
void | vertex (osg::Vec3 *vertex) |
void | combine (osg::Vec3 *vertex, void *vertex_data[4], GLfloat weight[4]) |
void | end () |
void | error (GLenum errorCode) |
Static Protected Member Functions |
static void CALLBACK | beginCallback (GLenum which, void *userData) |
static void CALLBACK | vertexCallback (GLvoid *data, void *userData) |
static void CALLBACK | combineCallback (GLdouble coords[3], void *vertex_data[4], GLfloat weight[4], void **outData, void *useData) |
static void CALLBACK | endCallback (void *userData) |
static void CALLBACK | errorCallback (GLenum errorCode, void *userData) |
Protected Attributes |
GLUtesselator * | _tobj |
PrimList | _primList |
Vec3dList | _coordData |
NewVertexList | _newVertexList |
GLenum | _errorCode |
WindingType | _wtype |
TessellationType | _ttype |
bool | _boundaryOnly |
unsigned int | _numberVerts |
osg::Geometry::PrimitiveSetList | _Contours |
unsigned int | _index |
osg::Vec3 | tessNormal |
unsigned int | _extraPrimitives |
Detailed Description
Originally a simple class for tessellating a single polygon boundary. Using old style glu tessellation functions for portability. Upgraded Jan 2004 to use the modern glu tessellation functions.
Member Typedef Documentation
Member Enumeration Documentation
we interpret all contours in the geometry as a single set to be tessellated or each separate drawable's contours needs to be tessellated.
- Enumerator:
TESS_TYPE_GEOMETRY |
|
TESS_TYPE_DRAWABLE |
|
TESS_TYPE_POLYGONS |
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The winding rule, see red book ch 11.
- Enumerator:
TESS_WINDING_ODD |
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TESS_WINDING_NONZERO |
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TESS_WINDING_POSITIVE |
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TESS_WINDING_NEGATIVE |
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TESS_WINDING_ABS_GEQ_TWO |
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Constructor & Destructor Documentation
osgUtil::Tessellator::Tessellator |
( |
) |
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osgUtil::Tessellator::~Tessellator |
( |
) |
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Member Function Documentation
void osgUtil::Tessellator::addContour |
( |
GLenum |
mode, |
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unsigned int |
first, |
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unsigned int |
last, |
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osg::Vec3Array * |
vertices |
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) |
| [protected] |
void osgUtil::Tessellator::addVertex |
( |
osg::Vec3 * |
vertex ) |
|
void osgUtil::Tessellator::begin |
( |
GLenum |
mode ) |
[protected] |
static void CALLBACK osgUtil::Tessellator::beginCallback |
( |
GLenum |
which, |
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void * |
userData |
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) |
| [static, protected] |
void osgUtil::Tessellator::beginContour |
( |
) |
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void osgUtil::Tessellator::beginTessellation |
( |
) |
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void osgUtil::Tessellator::collectTessellation |
( |
osg::Geometry & |
cxgeom, |
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unsigned int |
originalIndex |
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) |
| [protected] |
void osgUtil::Tessellator::combine |
( |
osg::Vec3 * |
vertex, |
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void * |
vertex_data[4], |
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GLfloat |
weight[4] |
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) |
| [protected] |
static void CALLBACK osgUtil::Tessellator::combineCallback |
( |
GLdouble |
coords[3], |
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void * |
vertex_data[4], |
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GLfloat |
weight[4], |
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void ** |
outData, |
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void * |
useData |
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) |
| [static, protected] |
void osgUtil::Tessellator::end |
( |
) |
[protected] |
static void CALLBACK osgUtil::Tessellator::endCallback |
( |
void * |
userData ) |
[static, protected] |
void osgUtil::Tessellator::endContour |
( |
) |
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void osgUtil::Tessellator::endTessellation |
( |
) |
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void osgUtil::Tessellator::error |
( |
GLenum |
errorCode ) |
[protected] |
static void CALLBACK osgUtil::Tessellator::errorCallback |
( |
GLenum |
errorCode, |
|
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void * |
userData |
|
) |
| [static, protected] |
bool osgUtil::Tessellator::getBoundaryOnly |
( |
) |
[inline] |
PrimList& osgUtil::Tessellator::getPrimList |
( |
) |
[inline] |
WindingType osgUtil::Tessellator::getWindingType |
( |
) |
[inline] |
void osgUtil::Tessellator::reduceArray |
( |
osg::Array * |
cold, |
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const unsigned int |
nnu |
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) |
| [protected] |
remove unused parts of the array, eg for wehn retessellating tessellation can introduce extra vertices for concave or crossing boundaries, these will leak memory if not removed when retessellating.
void osgUtil::Tessellator::reset |
( |
) |
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void osgUtil::Tessellator::retessellatePolygons |
( |
osg::Geometry & |
cxgeom ) |
|
Change the contours lists of the geometry into tessellated primitives (the list of primitives in the original geometry is stored in the Tessellator for possible re-use. The name remains retessellatePolygons although it now handles trifans, strips, quads etc. as well as Polygons so as to not break old codes relying on this function name.
void osgUtil::Tessellator::setBoundaryOnly |
( |
const bool |
tt ) |
[inline] |
Set and get tessellation request boundary only on/off
void osgUtil::Tessellator::setTessellationNormal |
( |
const osg::Vec3 |
norm ) |
[inline] |
Define the normal to the tessellated polygon - this provides a hint how to tessellate the contours; see gluTessNormal in red book or man pages. GWM July 2005. Can improve teselation "For example, if you know that all polygons lie in the x-y plane,
call gluTessNormal(tess, 0.0, 0.0, 1.0) before rendering any polygons."
void osgUtil::Tessellator::setTessellationType |
( |
const TessellationType |
tt ) |
[inline] |
Set and get tessellation type
void osgUtil::Tessellator::setWindingType |
( |
const WindingType |
wt ) |
[inline] |
Set and get tessellation windong rule
void osgUtil::Tessellator::vertex |
( |
osg::Vec3 * |
vertex ) |
[protected] |
static void CALLBACK osgUtil::Tessellator::vertexCallback |
( |
GLvoid * |
data, |
|
|
void * |
userData |
|
) |
| [static, protected] |
Member Data Documentation
List of primitives that define the contours
count of number of extra primitives added
count number of primitives in a geometry to get right no. of norms/colurs etc for per_primitive attributes.
number of vertices that are part of the 'original' set of contours
tessellation rule, which parts will become solid
winding rule, which parts will become solid
the gluTessNormal for tessellation hint
The documentation for this class was generated from the following file: