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IgSoPolyVol Class Reference

Provides an OpenInventor shape which matches the description of a D0-type extrusion of a polygonal face. More...

#include <Iguana/Inventor/interface/IgSoPolyVol.h>

Inheritance diagram for IgSoPolyVol:

List of all members.

Public Member Functions
	IgSoPolyVol (void)
virtual void	initialise (const int sides, const float dZHalf, const float *angles, const float *sideHalf)
	method to set actual values: note angles are in radians
Static Public Member Functions
static void	initClass (void)
Public Attributes
SoSFVec3f	center
SoSFFloat	dZ
SoMFVec3f	vtxPts
Protected Member Functions
virtual void	refresh (void)
Private Member Functions
	SO_KIT_CATALOG_ENTRY_HEADER (face)
	SO_KIT_CATALOG_ENTRY_HEADER (trans)
	SO_KIT_CATALOG_ENTRY_HEADER (hints)
	SO_KIT_HEADER (IgSoPolyVol)

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Detailed Description

Provides an OpenInventor shape which matches the description of a D0-type extrusion of a polygonal face.

Author:

G. Alverson, Northeastern Software Group

Date:

16 December 1998

Definition at line 28 of file IgSoPolyVol.h.

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Constructor & Destructor Documentation

IgSoPolyVol::IgSoPolyVol

(

void

)

Definition at line 26 of file IgSoPolyVol.cc.

References center, dZ, FALSE, IgSoShapeKit::setUpConnections(), TRUE, and vtxPts.

{
    SO_KIT_CONSTRUCTOR (IgSoPolyVol);
    SO_KIT_ADD_FIELD (vtxPts, (SbVec3f (0,0,0)));
    SO_KIT_ADD_FIELD (center, (SbVec3f (0,0,0)));
    SO_KIT_ADD_FIELD (dZ, (1.0));
    SO_KIT_ADD_CATALOG_ENTRY (hints, SoShapeHints, FALSE, separator,\x0, TRUE);
    SO_KIT_ADD_CATALOG_ENTRY (trans, SoTranslation, FALSE, separator,\x0, TRUE);
    SO_KIT_ADD_CATALOG_ENTRY (face, SoIndexedFaceSet, FALSE, separator,\x0, TRUE);
    SO_KIT_INIT_INSTANCE ();
    setUpConnections (true, true);

    const SbVec3f defPolyVol[10] = {
        SbVec3f (0.0,0.0,-0.5), SbVec3f (1.0,0.0,-0.5), SbVec3f (1.5,1.0,-0.5),
        SbVec3f (0.2,1.2,-0.5), SbVec3f (-0.2,1.0,-0.5),
        SbVec3f (0.0,0.0,0.5), SbVec3f (1.0,0.0,0.5), SbVec3f (1.5,1.0,0.5),
        SbVec3f (0.2,1.2,0.5), SbVec3f (-0.2,1.0,0.5)   
    };
    vtxPts.setValues (0,10,defPolyVol);
}

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Member Function Documentation

void IgSoPolyVol::initClass

(

void

)

[static]

Reimplemented from IgSoShapeKit.

Definition at line 23 of file IgSoPolyVol.cc.

Referenced by initNodes(), and initShapes().

{ SO_KIT_INIT_CLASS (IgSoPolyVol, IgSoShapeKit, "IgSoShapeKit"); }

void IgSoPolyVol::initialise	(	const int	sides,
		const float	dZHalf,
		const float *	angles,
		const float *	sideHalf
	)			[virtual]

method to set actual values: note angles are in radians

Definition at line 112 of file IgSoPolyVol.cc.

References funct::cos(), i, funct::sin(), vtxPts, x, y, and z.

{
    assert (sides > 2);

    //  Stuff the points into the vtxPts
    vtxPts.setNum (2*sides);

    SbVec3f     *pt = vtxPts.startEditing ();
    float       x = 0;
    float       y = 0;
    float       z = 0;

    for (int i = 0; i < sides; i++, pt++)
    {
        *pt = SbVec3f (x,y,z-dZHalf);
        *(pt+sides) = SbVec3f (x,y,z+dZHalf);
        x += 2 * (*sideHalf) * cos (*angles);
        y += 2 * (*sideHalf++) * sin (*angles++);
    }

    vtxPts.finishEditing ();
}

void IgSoPolyVol::refresh

(

void

)

[protected, virtual]

Reimplemented from IgSoShapeKit.

Definition at line 48 of file IgSoPolyVol.cc.

References center, i, NULL, and vtxPts.

{
    if (vtxPts.getNum () < 2) 
    {
        // set parts
        setPart ("hints", NULL);
        setPart ("trans", NULL);
        setPart ("face",  NULL);

        return;
    }
    
    SoTranslation       *trans = new SoTranslation;
    SoShapeHints        *hints = new SoShapeHints;
    SoVertexProperty    *vtx = new SoVertexProperty;
    SoIndexedFaceSet    *face = new SoIndexedFaceSet;

    hints->vertexOrdering = SoShapeHints::COUNTERCLOCKWISE;
    hints->faceType = SoShapeHints::UNKNOWN_FACE_TYPE;
    hints->shapeType = SoShapeHints::SOLID;
    hints->creaseAngle = 0;

    trans->translation = center;

    //  Create the face set
    vtx->vertex = vtxPts;
    face->vertexProperty = vtx;

    int nsides = vtxPts.getNum ()/2; // number of sides of front polygon
    face->coordIndex.setNum (7 * nsides + 2); //5*nsides for side polys+ 2* (nsides+1) for front and back

    int *indx = face->coordIndex.startEditing ();
    int i; 

    //  sides
    for (i = 0; i < nsides-1; i++)
    {
        *indx++ = i;
        *indx++ = i+1;
        *indx++ = i+nsides+1;
        *indx++ = i+nsides;
        *indx++ = SO_END_FACE_INDEX;
    } 
    *indx++ = i;  *indx++ = 0;  *indx++ = nsides; *indx++ = i+nsides;
    *indx++ = SO_END_FACE_INDEX;

    //  front & back faces; back face counts down
    for (i = nsides-1; i > -1; i--)
    {
        *indx = i;
        *((indx++) + nsides + 1) = 2*nsides-1-i; // bump past n vertices+end_face
    }
    *indx++ = SO_END_FACE_INDEX;
    *(indx+nsides) = SO_END_FACE_INDEX;
    face->coordIndex.finishEditing ();

    // set parts
    setPart ("hints", hints);
    setPart ("trans", trans);
    setPart ("face",  face);
}

IgSoPolyVol::SO_KIT_CATALOG_ENTRY_HEADER

(

face

)

[private]

IgSoPolyVol::SO_KIT_CATALOG_ENTRY_HEADER

(

trans

)

[private]

IgSoPolyVol::SO_KIT_CATALOG_ENTRY_HEADER

(

hints

)

[private]

IgSoPolyVol::SO_KIT_HEADER

(

IgSoPolyVol

)

[private]

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Member Data Documentation

SoSFVec3f IgSoPolyVol::center

Definition at line 40 of file IgSoPolyVol.h.

Referenced by IgSoPolyVol(), and refresh().

SoSFFloat IgSoPolyVol::dZ

Definition at line 41 of file IgSoPolyVol.h.

Referenced by IgSoPolyVol().

SoMFVec3f IgSoPolyVol::vtxPts

Definition at line 39 of file IgSoPolyVol.h.

Referenced by IgSoPolyVol(), initialise(), and refresh().

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

• Iguana/Inventor/interface/IgSoPolyVol.h
• Iguana/Inventor/src/IgSoPolyVol.cc

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