OSGSimpleGeometry.cpp File Reference

#include <stdlib.h>
#include <stdio.h>
#include "OSGConfig.h"
#include <OSGLog.h>
#include <OSGQuaternion.h>
#include <OSGSimpleMaterial.h>
#include <OSGTriangleIterator.h>
#include "OSGSimpleGeometry.h"

Go to the source code of this file.

Namespaces
namespace	osg
Functions
Real32	setVecLen (Vec3f &vec, Real32 length)
Real32	calcTexS (Vec3f &n, Real32 theta)
void	addPoint (Pnt3f v, UInt32 index, Real32 radius, GeoPositions3f::StoredFieldType *p, GeoNormals3f::StoredFieldType *n, GeoTexCoords2f::StoredFieldType *tx)
void	subdivideTriangle (UInt32 i1, UInt32 i2, UInt32 i3, Int32 depth, GeoPositions3f::StoredFieldType *p, GeoNormals3f::StoredFieldType *n, GeoTexCoords2f::StoredFieldType *tx, GeoIndicesUI32::StoredFieldType *i, UInt32 &z, Real32 radius)
GeoPositions3fPtr	osg::makeGeoPositions3fPtr (UInt32 uiSize)
	some workaround functions for Windows problems
GeoIndicesUI32Ptr	osg::makeGeoIndicesUI32Ptr (UInt32 uiSize)
GeoPLengthsPtr	osg::makeGeoPLengthsPtr (UInt32 uiSize)
GeoPTypesPtr	osg::makeGeoPTypesPtr (UInt32 uiSize)
Material Access
MaterialPtr	osg::getDefaultMaterial (void)
MaterialPtr	osg::getDefaultUnlitMaterial (void)
Construction functions
NodePtr	osg::makePlane (Real32 xsize, Real32 ysize, UInt16 hor, UInt16 vert)
GeometryPtr	osg::makePlaneGeo (Real32 xsize, Real32 ysize, UInt16 hor, UInt16 vert)
NodePtr	osg::makeCone (Real32 height, Real32 botradius, UInt16 sides, bool doSide, bool doBottom)
GeometryPtr	osg::makeConeGeo (Real32 height, Real32 botradius, UInt16 sides, bool doSide, bool doBottom)
NodePtr	osg::makeCylinder (Real32 height, Real32 radius, UInt16 sides, bool doSide, bool doTop, bool doBottom)
GeometryPtr	osg::makeCylinderGeo (Real32 height, Real32 radius, UInt16 sides, bool doSide, bool doTop, bool doBottom)
NodePtr	osg::makeConicalFrustum (Real32 height, Real32 topradius, Real32 botradius, UInt16 sides, bool doSide, bool doTop, bool doBottom)
GeometryPtr	osg::makeConicalFrustumGeo (Real32 height, Real32 topradius, Real32 botradius, UInt16 sides, bool doSide, bool doTop, bool doBottom)
NodePtr	osg::makeTorus (Real32 innerRadius, Real32 outerRadius, UInt16 sides, UInt16 rings)
GeometryPtr	osg::makeTorusGeo (Real32 innerRadius, Real32 outerRadius, UInt16 sides, UInt16 rings)
NodePtr	osg::makeSphere (UInt16 depth, Real32 radius)
GeometryPtr	osg::makeSphereGeo (UInt16 depth, Real32 radius)
NodePtr	osg::makeLatLongSphere (UInt16 latres, UInt16 longres, Real32 radius)
GeometryPtr	osg::makeLatLongSphereGeo (UInt16 latres, UInt16 longres, Real32 radius)
NodePtr	osg::makeBox (Real32 xsize, Real32 ysize, Real32 zsize, UInt16 hor, UInt16 vert, UInt16 depth)
GeometryPtr	osg::makeBoxGeo (Real32 xsize, Real32 ysize, Real32 zsize, UInt16 hor, UInt16 vert, UInt16 depth)
Variables
static SimpleMaterialPtr	_defaultMaterial
static SimpleMaterialPtr	_defaultUnlitMaterial

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Function Documentation

Real32 setVecLen	(	Vec3f &	vec,
		Real32	length
	)

Definition at line 683 of file OSGSimpleGeometry.cpp.

References osg::VectorInterface< ValueTypeT, StorageInterfaceT >::length().

Referenced by osg::makeSphereGeo().

{
    Real32 len = vec.length();
    if(len == 0.0) 
    {
        len = 1;
    } 
    else 
    {
        len = length / len;
    }
    vec *= len;
    
    return length;
}

Real32 calcTexS	(	Vec3f &	n,
		Real32	theta
	)

Definition at line 699 of file OSGSimpleGeometry.cpp.

References osg::Eps, and osg::osgatan2().

Referenced by addPoint(), and osg::makeSphereGeo().

{
    const Real32 TwoPi  = 6.283185307179586;
    const Real32 HalfPi = 1.570796326794897;
    
    Real32 phi = osgatan2(-n[2], n[0]) - HalfPi;

    if (phi <= -Eps)
        phi += TwoPi;
    phi /= TwoPi;
    
    return phi;
}

void addPoint	(	Pnt3f	v,
		UInt32	index,
		Real32	radius,
		GeoPositions3f::StoredFieldType *	p,
		GeoNormals3f::StoredFieldType *	n,
		GeoTexCoords2f::StoredFieldType *	tx
	)

Definition at line 713 of file OSGSimpleGeometry.cpp.

References calcTexS(), osg::VectorInterface< ValueTypeT, StorageInterfaceT >::normalize(), osg::osgacos(), and osg::Pi.

Referenced by subdivideTriangle().

{
    Vec3f norm(v[0], v[1], v[2]);

    norm.normalize();
    n->push_back(norm);

    Pnt3f pnt(radius * norm);
    p->push_back(pnt);

    Vec2f texCoord;

    // Theta -> v
    texCoord[1] = (Pi - osgacos(norm[1])) / Pi;

    // Phi -> u
    texCoord[0] = calcTexS(norm, texCoord[1]);

    tx->push_back(texCoord);
}

void subdivideTriangle	(	UInt32	i1,
		UInt32	i2,
		UInt32	i3,
		Int32	depth,
		GeoPositions3f::StoredFieldType *	p,
		GeoNormals3f::StoredFieldType *	n,
		GeoTexCoords2f::StoredFieldType *	tx,
		GeoIndicesUI32::StoredFieldType *	i,
		UInt32 &	z,
		Real32	radius
	)

Definition at line 737 of file OSGSimpleGeometry.cpp.

References addPoint().

Referenced by osg::makeSphereGeo().

{   
    if (depth == 0) 
    {
        i->push_back(i1);
        i->push_back(i1);
        i->push_back(i2);
        i->push_back(i2);
        i->push_back(i3);
        i->push_back(i3);
                            
        return;         
    }

    Pnt3f v1 = (*p)[i1],
          v2 = (*p)[i2],
          v3 = (*p)[i3];
    Pnt3f v12, v23, v31;

    v12 = v1 + (v2 - v1) * .5f;
    v23 = v2 + (v3 - v2) * .5f;
    v31 = v3 + (v1 - v3) * .5f;
    
    v12 /= 2.0f;
    v23 /= 2.0f;
    v31 /= 2.0f;
    
    UInt32 i12 = z++, i23 = z++, i31 = z++;

    addPoint(v12,i12,radius,p,n,tx);
    addPoint(v23,i23,radius,p,n,tx);
    addPoint(v31,i31,radius,p,n,tx);
    
    subdivideTriangle( i1, i12, i31, depth - 1, p,n,tx,i, z, radius);
    subdivideTriangle( i2, i23, i12, depth - 1, p,n,tx,i, z, radius);
    subdivideTriangle( i3, i31, i23, depth - 1, p,n,tx,i, z, radius);
    subdivideTriangle(i12, i23, i31, depth - 1, p,n,tx,i, z, radius);
}