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import com.sun.opengl.util.Animator;
import com.sun.opengl.util.BufferUtil;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import java.nio.ByteBuffer;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.nio.ShortBuffer;
import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCanvas;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.glu.GLU;
import javax.swing.JFrame;
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author dbourgais
*/
public class VBOTestJOGL {
public static void main(String[]args){
GLCanvas canvas = new GLCanvas();
VBOTest demo = new VBOTest();
canvas.addGLEventListener(demo);
final Animator animator = new Animator(canvas);
animator.start();
JFrame frame = new JFrame("VBO");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
canvas.setSize(400, 400);
frame.add(canvas, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
canvas.requestFocus();
}
}
class VBOTest implements GLEventListener, MouseWheelListener {
private float zoom = -5;
/**Extract from a tuto*/
final int positionSize = 6 * 3 * BufferUtil.SIZEOF_FLOAT;
final float[]PositionData = {
-1.0f, -1.0f, 0,
1.0f, -1.0f, 0,
1.0f, 1.0f, 0,
1.0f, 1.0f, 0,
-1.0f, 1.0f, 0,
-1.0f, -1.0f, 0
};
FloatBuffer positionData;
final int colorSize = 6 * 3 * BufferUtil.SIZEOF_BYTE;
final byte[]ColorData = {
(byte)255, (byte)0, (byte)0,
(byte)255, (byte)255, (byte)0,
(byte)0, (byte)255, (byte)0,
(byte)0, (byte)255, (byte)0,
(byte)0, (byte)0, (byte)255,
(byte)255, (byte)0, (byte)0
};
ByteBuffer colorData;
final int bufferSize = 2;
int BufferName[];
IntBuffer bufferName;
final int vertexCount = 6;
private boolean vboCompatible(final GL gl) {
String versionStr = gl.glGetString(GL.GL_VERSION);
versionStr = versionStr.substring(0, 3);
// Check if extension is available.
boolean extensionOK = gl.isExtensionAvailable("GL_ARB_vertex_buffer_object");
// Check for VBO functions.
boolean functionsOK =
gl.isFunctionAvailable("glGenBuffersARB") &&
gl.isFunctionAvailable("glBindBufferARB") &&
gl.isFunctionAvailable("glBufferDataARB") &&
gl.isFunctionAvailable("glDeleteBuffersARB");
return (extensionOK || functionsOK);
}
public void init(GLAutoDrawable drawable) {
final GL gl = drawable.getGL();
gl.glShadeModel(gl.GL_SMOOTH);
gl.glEnable(gl.GL_DEPTH_TEST);
bufferName = BufferUtil.newIntBuffer(bufferSize);
gl.glGenBuffers(bufferSize, bufferName);
colorData = BufferUtil.newByteBuffer(this.colorSize);
colorData.put(ColorData);
colorData.rewind();
positionData = BufferUtil.newFloatBuffer(this.positionSize);
positionData.put(PositionData);
positionData.rewind();
drawable.addMouseWheelListener(this);
}
public void display(GLAutoDrawable drawable) {
final GL gl = drawable.getGL();
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
gl.glClearColor(0, 0, 0, 1);
gl.glMatrixMode(gl.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glTranslatef(0, 0, zoom);
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, bufferName.get(1));
gl.glBufferData(gl.GL_ARRAY_BUFFER, colorSize, colorData, gl.GL_STREAM_DRAW);
gl.glColorPointer(3, gl.GL_UNSIGNED_BYTE, 0, 0);
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, bufferName.get(0));
gl.glBufferData(gl.GL_ARRAY_BUFFER, this.positionSize, positionData, gl.GL_STREAM_DRAW);
gl.glVertexPointer(3, gl.GL_FLOAT, 0, 0);
gl.glEnableClientState(gl.GL_VERTEX_ARRAY);
gl.glEnableClientState(gl.GL_COLOR_ARRAY);
gl.glDrawArrays(gl.GL_TRIANGLES, 0, vertexCount);
gl.glDisableClientState(gl.GL_COLOR_ARRAY);
gl.glDisableClientState(gl.GL_VERTEX_ARRAY);
gl.glFlush();
}
public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
final int maxZ = 1000;
GL gl = drawable.getGL();
gl.glViewport(0, 0, width, height);
/*For the camera*/
gl.glMatrixMode(gl.GL_PROJECTION);
gl.glLoadIdentity();
//Change this by glOrtho
new GLU().gluPerspective(45., (float) width / height, 1., maxZ);
//new GLU().gluOrtho2D(-10, 10, -10, 10);
/*Model & view*/
gl.glMatrixMode(gl.GL_MODELVIEW);
gl.glLoadIdentity();
}
public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) {
}
public void mouseWheelMoved(MouseWheelEvent e) {
if (e.getWheelRotation() > 0) {
zoom += 0.5;
} else {
zoom -= 0.5;
}
System.out.println(zoom);
}
} |
