OpenSceneGraph/examples/osgshape/osgshape.cpp

#include <osg/Geode>
#include <osg/ShapeDrawable>
#include <osg/Material>
#include <osg/Texture2D>

#include <osgViewer/Viewer>

#include <osgDB/ReadFile>

#include <osg/Math>

// for the grid data..
#include "../osghangglide/terrain_coords.h"

osg::Geode* createShapes()
{
    osg::Geode* geode = new osg::Geode();

    // ---------------------------------------
    // Set up a StateSet to texture the objects
    // ---------------------------------------
    osg::StateSet* stateset = new osg::StateSet();

    osg::Image* image = osgDB::readImageFile( "Images/lz.rgb" );

    if (image)
    {
        osg::Texture2D* texture = new osg::Texture2D;
        texture->setImage(image);
        stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
    }
    
    geode->setStateSet( stateset );
    
    float radius = 0.8f;
    float height = 1.0f;
    
    osg::TessellationHints* hints = new osg::TessellationHints;
    hints->setDetailRatio(0.5f);
    
    geode->addDrawable(new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0.0f,0.0f,0.0f),radius),hints));
    geode->addDrawable(new osg::ShapeDrawable(new osg::Box(osg::Vec3(2.0f,0.0f,0.0f),2*radius),hints));
    geode->addDrawable(new osg::ShapeDrawable(new osg::Cone(osg::Vec3(4.0f,0.0f,0.0f),radius,height),hints));
    geode->addDrawable(new osg::ShapeDrawable(new osg::Cylinder(osg::Vec3(6.0f,0.0f,0.0f),radius,height),hints));
    geode->addDrawable(new osg::ShapeDrawable(new osg::Capsule(osg::Vec3(8.0f,0.0f,0.0f),radius,height),hints));

    osg::HeightField* grid = new osg::HeightField;
    grid->allocate(38,39);
    grid->setXInterval(0.28f);
    grid->setYInterval(0.28f);
    
    for(unsigned int r=0;r<39;++r)
    {
        for(unsigned int c=0;c<38;++c)
        {
            grid->setHeight(c,r,vertex[r+c*39][2]);
        }
    }
    geode->addDrawable(new osg::ShapeDrawable(grid));
    
    osg::ConvexHull* mesh = new osg::ConvexHull;
    osg::Vec3Array* vertices = new osg::Vec3Array(4);
    (*vertices)[0].set(9.0+0.0f,-1.0f+2.0f,-1.0f+0.0f);
    (*vertices)[1].set(9.0+1.0f,-1.0f+0.0f,-1.0f+0.0f);
    (*vertices)[2].set(9.0+2.0f,-1.0f+2.0f,-1.0f+0.0f);
    (*vertices)[3].set(9.0+1.0f,-1.0f+1.0f,-1.0f+2.0f);
    osg::UByteArray* indices = new osg::UByteArray(12);
    (*indices)[0]=0;
    (*indices)[1]=2;
    (*indices)[2]=1;
    (*indices)[3]=0;
    (*indices)[4]=1;
    (*indices)[5]=3;
    (*indices)[6]=1;
    (*indices)[7]=2;
    (*indices)[8]=3;
    (*indices)[9]=2;
    (*indices)[10]=0;
    (*indices)[11]=3;
    mesh->setVertices(vertices);
    mesh->setIndices(indices);
    geode->addDrawable(new osg::ShapeDrawable(mesh));
    
    return geode;
}

int main(int, char **)
{
    // construct the viewer.
    osgViewer::Viewer viewer;

    // add model to viewer.
    viewer.setSceneData( createShapes() );

    return viewer.run();
}