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Introduced use of TempaltePrimitiveFunctor and TempaltePrimitiveIndexFunctor as a test of these template classes

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This commit is contained in:
Robert Osfield 2017-04-27 19:04:54 +01:00
parent bc0a402dac
commit 40ca018e66
1 changed files with 68 additions and 11 deletions
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79
examples/osggeometry/osggeometry.cpp
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@ -23,7 +23,8 @@
#include <osg/MatrixTransform>
#include <osg/Texture2D>
#include <osg/PolygonStipple>
#include <osg/TriangleFunctor>
#include <osg/TemplatePrimitiveFunctor>
#include <osg/TemplatePrimitiveIndexFunctor>
#include <osg/io_utils>
#include <osgDB/ReadFile>
@ -60,25 +61,72 @@
struct NormalPrint
{
void operator() (const osg::Vec3& v1,const osg::Vec3& v2,const osg::Vec3& v3) const
void operator() (const osg::Vec3& v1, bool) const
{
std::cout << "\rpoint("<<v1<<")"<<std::endl;
}
void operator() (const osg::Vec3& v1,const osg::Vec3& v2, bool) const
{
std::cout << "\tline("<<v1<<") ("<<v2<<")"<<std::endl;
}
void operator() (const osg::Vec3& v1,const osg::Vec3& v2,const osg::Vec3& v3, bool) const
{
osg::Vec3 normal = (v2-v1)^(v3-v2);
normal.normalize();
std::cout << "\t("<<v1<<") ("<<v2<<") ("<<v3<<") "<<") normal ("<<normal<<")"<<std::endl;
std::cout << "\ttriangle("<<v1<<") ("<<v2<<") ("<<v3<<") "<<") normal ("<<normal<<")"<<std::endl;
}
void operator() (const osg::Vec3& v1,const osg::Vec3& v2,const osg::Vec3& v3,const osg::Vec3& v4, bool) const
{
osg::Vec3 normal = (v2-v1)^(v3-v2);
normal.normalize();
std::cout << "\tquad("<<v1<<") ("<<v2<<") ("<<v3<<") ("<<v4<<") "<<")"<<std::endl;
}
};
// decompose Drawable primitives into triangles, print out these triangles and computed normals.
void printTriangles(const std::string& name, osg::Drawable& drawable)
void printPrimitives(const std::string& name, osg::Drawable& drawable)
{
std::cout<<name<<std::endl;
osg::TriangleFunctor<NormalPrint> tf;
osg::TemplatePrimitiveFunctor<NormalPrint> tf;
drawable.accept(tf);
std::cout<<std::endl;
}
struct PrimitiveIndexPrint
{
void operator() (unsigned int p1) const
{
std::cout << "\tpoint("<<p1<<")"<<std::endl;
}
void operator() (unsigned int p1, unsigned int p2) const
{
std::cout << "\tline("<<p1<<", "<<p2<<")"<<std::endl;
}
void operator() (unsigned int p1, unsigned int p2, unsigned int p3) const
{
std::cout << "\ttriangle("<<p1<<", "<<p2<<", "<<p3<<")"<<std::endl;
}
void operator() (unsigned int p1, unsigned int p2, unsigned int p3, unsigned int p4) const
{
std::cout << "\tquad("<<p1<<", "<<p2<<", "<<p3<<", "<<p4<<")"<<std::endl;
}
};
// decompose Drawable primitives into triangles, print out these triangles and computed normals.
void printPrimitiveIndices(const std::string& name, osg::Drawable& drawable)
{
std::cout<<name<<std::endl;
osg::TemplatePrimitiveIndexFunctor<PrimitiveIndexPrint> pf;
drawable.accept(pf);
std::cout<<std::endl;
}
/// Create a scene with examples of the different types of OpenGL primitives.
/// The primitives are the same as shown in the OpenGL diagram loaded in
@ -144,6 +192,7 @@ osg::Node* createScene()
// to draw, and the third parameter is the number of points to draw.
pointsGeom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::POINTS,0,vertices->size()));
printPrimitiveIndices("POINTS indices", *pointsGeom);
// add the points geometry to the geode.
geode->addDrawable(pointsGeom);
@ -189,6 +238,7 @@ osg::Node* createScene()
// since we know up front,
linesGeom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES,0,8));
printPrimitiveIndices("LINES indices", *linesGeom);
// add the points geometry to the geode.
geode->addDrawable(linesGeom);
@ -229,6 +279,7 @@ osg::Node* createScene()
// since we know up front,
linesGeom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP,0,5));
printPrimitiveIndices("LINE_STRIP indices", *linesGeom);
// add the points geometry to the geode.
geode->addDrawable(linesGeom);
@ -274,6 +325,7 @@ osg::Node* createScene()
// since we know up front,
linesGeom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINE_LOOP,0,numCoords));
printPrimitiveIndices("LINE_LOOP indices", *linesGeom);
// add the points geometry to the geode.
geode->addDrawable(linesGeom);
@ -342,7 +394,8 @@ osg::Node* createScene()
// since we know up front,
polyGeom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::POLYGON,0,numCoords));
printTriangles("Polygon",*polyGeom);
printPrimitiveIndices("POLYGON indices", *polyGeom);
printPrimitives("POLYGON vertices", *polyGeom);
// add the points geometry to the geode.
geode->addDrawable(polyGeom);
@ -388,7 +441,8 @@ osg::Node* createScene()
polyGeom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS,0,numCoords));
printTriangles("Quads",*polyGeom);
printPrimitiveIndices("QUADS indices", *polyGeom);
printPrimitives("QUADS vertices", *polyGeom);
// add the points geometry to the geode.
geode->addDrawable(polyGeom);
@ -434,8 +488,8 @@ osg::Node* createScene()
// since we know up front,
polyGeom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUAD_STRIP,0,numCoords));
printTriangles("Quads strip",*polyGeom);
printPrimitiveIndices("QUAD_STRIP indices", *polyGeom);
printPrimitives("QUAD_STRIP vertices", *polyGeom);
// add the points geometry to the geode.
geode->addDrawable(polyGeom);
@ -511,7 +565,8 @@ osg::Node* createScene()
stateSet->setAttributeAndModes(polygonStipple,osg::StateAttribute::OVERRIDE|osg::StateAttribute::ON);
#endif
printTriangles("Triangles/Strip/Fan",*polyGeom);
printPrimitiveIndices("Triangles/Strip/Fan indices", *polyGeom);
printPrimitives("Triangles/Strip/Fan vertices", *polyGeom);
// add the points geometry to the geode.
geode->addDrawable(polyGeom);
@ -641,7 +696,9 @@ osg::Node* createBackground()
polyGeom->setStateSet(stateset);
// create the Geode (Geometry Node) to contain the quad's osg::Geometry
printPrimitiveIndices("DrawElementsUShort TRIANGLE_STRIP", *polyGeom);
// create the Geode (Geometry Node) to contain all our osg::Geometry objects.
osg::Geode* geode = new osg::Geode();
// add the points geometry to the geode.