#include <Inventor/Xt/SoXt.h>
#include <Inventor/Xt/SoXtRenderArea.h>
#include <Inventor/nodes/SoCone.h>
#include <Inventor/nodes/SoDirectionalLight.h>
#include <Inventor/nodes/SoMaterial.h>
#include <Inventor/nodes/SoPerspectiveCamera.h>
#include <Inventor/nodes/SoSeparator.h>
#include <stdlib.h>
int main (int, char **argv)
{
 Widget myWindow = SoXt::init(argv[0]);
 if(myWindow == NULL) exit(1);
 SoSeparator *root = new SoSeparator;
 SoPerspectiveCamera *myCamera = new SoPerspectiveCamera;
 SoMaterial *myMaterial = new SoMaterial;
 root->ref();
 root->addChild(myCamera);
 root->addChild(new SoDirectionalLight);
 myMaterial->diffuseColor.setValue(1.0, 0.0, 0.0);
 root->addChild(myMaterial);
 root->addChild(new SoCone);

 SoXtRenderArea *myRenderArea = new SoXtRenderArea(myWindow);
 myCamera->viewAll(root, myRenderArea->getViewportRegion());
 myRenderArea->setSceneGraph(root);
 myRenderArea->setTitle("Red Cone");
 myRenderArea->show();
 SoXt::show(myWindow);
 SoXt::mainLoop();
}