helloworldjogl.java

基于java的3d开发库。对坐java3d的朋友有很大的帮助。

//===========================================================================

// VITRAL recomendation: Use explicit class imports (not .*) in hello world 
// type programs so the user/programmer can be exposed to all the complexity 
// involved. This will help him to dominate the involved libraries.

import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.media.opengl.GL;
import javax.media.opengl.glu.GLU;
import javax.media.opengl.GLCanvas;
import javax.media.opengl.GLDrawable;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLDrawableFactory;
import javax.media.opengl.GLEventListener;

public class HelloWorldJOGL extends JFrame implements GLEventListener {

    public HelloWorldJOGL() {
        super("VITRAL concept test - JOGL Hello World");

        GLCanvas canvas = new GLCanvas();
        canvas.addGLEventListener(this);

        this.add(canvas, BorderLayout.CENTER);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    
    public Dimension getPreferredSize() {
        return new Dimension (640, 480);
    }
    
    public static void main (String[] args) {
        JFrame f = new HelloWorldJOGL();
        f.pack();
        f.setVisible(true);
    }
    
    /** Called by drawable to initiate drawing */
    public void display(GLAutoDrawable drawable) {
        GL gl = drawable.getGL();

        gl.glClearColor(0, 0, 0, 1);
        gl.glClear(GL.GL_COLOR_BUFFER_BIT);
        gl.glColor3d(1, 1, 1); 

        gl.glMatrixMode(GL.GL_PROJECTION);
        gl.glLoadIdentity();
        gl.glMatrixMode(GL.GL_MODELVIEW);
        gl.glLoadIdentity();

        gl.glBegin(GL.GL_LINES);
            gl.glVertex3d(0, 0, 0);
            gl.glVertex3d(0.5, 0.5, 0);
        gl.glEnd();
    }
   
    /** Not used method, but needed to instanciate GLEventListener */
    public void init(GLAutoDrawable drawable) {
        ;
    }

    /** Not used method, but needed to instanciate GLEventListener */
    public void displayChanged(GLAutoDrawable drawable, boolean a, boolean b) {
        ;
    }
    
    /** Called to indicate the drawing surface has been moved and/or resized */
    public void reshape (GLAutoDrawable drawable,
                         int x,
                         int y,
                         int width,
                         int height) {
        GL gl = drawable.getGL();
        gl.glViewport(0, 0, width, height); 
    }   
}

//===========================================================================
//= EOF                                                                     =
//===========================================================================