OpenSceneGraph/examples/osgshape/osgshape.cpp

/* OpenSceneGraph example, osgshape.
*
*  Permission is hereby granted, free of charge, to any person obtaining a copy
*  of this software and associated documentation files (the "Software"), to deal
*  in the Software without restriction, including without limitation the rights
*  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
*  copies of the Software, and to permit persons to whom the Software is
*  furnished to do so, subject to the following conditions:
*
*  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
*  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
*  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
*  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
*  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
*  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
*  THE SOFTWARE.
*/

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

#include <osgViewer/Viewer>
#include <osgGA/StateSetManipulator>

#include <osgDB/ReadFile>
#include <osgDB/WriteFile>

#include <osg/Math>

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

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


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

    osg::ref_ptr<osg::Image> image = osgDB::readRefImageFile( "Images/lz.rgb" );
    if (image)
    {
        osg::Texture2D* texture = new osg::Texture2D;
        texture->setImage(image);
        texture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
        stateset->setTextureAttributeAndModes(0,texture, osg::StateAttribute::ON);
    }

    stateset->setMode(GL_LIGHTING, 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;
    if (arguments.read("--large"))
    {
        unsigned int numX = 512;
        unsigned int numY = 512;
        double sizeX = 10.0;
        double sizeY = 10.0;
        grid->allocate(numX,numY);
        grid->setXInterval(sizeX/float(numX));
        grid->setYInterval(sizeY/float(numY));

        for(unsigned int r=0;r<numY;++r)
        {
            for(unsigned int c=0;c<numX;++c)
            {
                double rx = double(c)/double(numX-1);
                double ry = double(r)/double(numY-1);

                grid->setHeight(c, r, 2.0*sin(rx*ry*4.0*osg::PI));
            }
        }
    }
    else
    {
        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 argc, char **argv)
{
    osg::ArgumentParser arguments(&argc,argv);

    // construct the viewer.
    osgViewer::Viewer viewer(arguments);

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

    // add the state manipulator
    viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );

    return viewer.run();
}