import com.blaxxun.x3d.*;
import com.blaxxun.bx3d.blaxxun3d;

/**
* example1
*
* implements a simple example, showing how to acces blaxxun3d nodes
*
* @author marc kaufmann (mk), blaxxun interactive
* @version 0.1
*
**/

public class example1 extends java.applet.Applet {

    protected Browser	                browser=null;   
    
    protected Node                      sphereMaterial=null;
    protected Field                     diffuseCol=null;
    
    public example1() {		
    }


	public void start(){
		// connect to blaxxun3d
		while (browser==null) {
			browser=blaxxun3d.getBrowser("browser");
			hesitate();
		}
        System.out.println("Got browser.");
		
		// wait till everything is loaded
		while (browser.getWorld()==null) {
			hesitate();
		}
        System.out.println("World loaded.");
		
		// connect to nodes
        try {
       	    sphereMaterial=browser.getNode("sphereMaterial");
       	    diffuseCol=sphereMaterial.getField("diffuseColor");            
        }
        catch (X3DException notfound) {
            System.out.println("Can't find nodes. Aborting.");
			stop();
        }
		catch (IllegalArgumentException sceneerror) { // this should not happen at all
            System.out.println("No scene present. Aborting.");
			stop();
		}
       System.out.println("Got nodes.");
       	    
		// main loop
		float[] col=new float[3];
		while (true) {
       		// get current color values
       		col=diffuseCol.getValueFloatArray(0,-1);

			// calculate new values
			for (int i=0;i<3;i++) col[i]=(float)Math.random(); 
			
			// sync renderer
			browser.beginUpdate();
			
       		// send them to the sphere			
       		diffuseCol.setValueFloatArray(0,-1,col);
			
			// continue rendering
			browser.endUpdate();
			
			hesitate();			
       	}
	}

	/**
	 * waits 300 millis
	 */
	private void hesitate() {
		try {
			Thread.sleep(300);
		}
		catch(InterruptedException ignored) {}
	}
}