package glredbook11;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.nio.*;
import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import sun.security.provider.certpath.Vertex;
import com.sun.opengl.util.*;
/**
* This program demonstrates vertex arrays.
*
* @author Kiet Le (Java conversion)
*/
public class varray
extends JFrame
implements GLEventListener, KeyListener, MouseListener
{
// private GL gl;
private GLU glu;
private GLUT glut;
private GLCapabilities caps;
private GLCanvas canvas;
private static int POINTER = 1;
private static int INTERLEAVED = 2;
private static int DRAWARRAY = 1;
private static int ARRAYELEMENT = 2;
private static int DRAWELEMENTS = 3;
private static int setupMethod = POINTER;
private static int derefMethod = DRAWARRAY;
private static IntBuffer verticesBuf;
private static FloatBuffer colorsBuf;
private static FloatBuffer intertwinedBuf;
Screenshot capture;
//
public varray()
{
super("varray");
//
caps = new GLCapabilities();
canvas = new GLCanvas(caps);
canvas.addGLEventListener(this);
canvas.addKeyListener(this);
canvas.addMouseListener(this);
//
getContentPane().add(canvas);
}
public void run()
{
setSize(512, 256);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
canvas.requestFocusInWindow();
}
public static void main(String[] args)
{
new varray().run();
}
public void init(GLAutoDrawable drawable)
{
GL gl = drawable.getGL();
glu = new GLU();
glut = new GLUT();
//
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.glShadeModel(GL.GL_SMOOTH);
setupPointers(gl);
}
public void display(GLAutoDrawable drawable)
{
GL gl = drawable.getGL();
//
gl.glClear(GL.GL_COLOR_BUFFER_BIT);
if (derefMethod == DRAWARRAY)
{
gl.glDrawArrays(GL.GL_TRIANGLES, 0, 6);
}
else if (derefMethod == ARRAYELEMENT)
{
gl.glBegin(GL.GL_TRIANGLES);
gl.glArrayElement(2);
gl.glArrayElement(3);
gl.glArrayElement(5);
gl.glEnd();
}
else if (derefMethod == DRAWELEMENTS)
{
int indices[] = new int[]
{ 0, 1, 3, 4 };
IntBuffer indicesBuf = BufferUtil.newIntBuffer(indices.length);
for (int i = 0; i < indices.length; i++)
indicesBuf.put(indices[i]);
indicesBuf.rewind();
gl.glDrawElements(GL.GL_POLYGON, 4, GL.GL_UNSIGNED_INT, indicesBuf);
}
gl.glFlush();
// gl calls from C example's mouse routine are moved here
if (setupMethod == INTERLEAVED) setupInterleave(gl);
else setupPointers(gl);
}
public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h)
{
GL gl = drawable.getGL();
//
gl.glViewport(0, 0, w, h);
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glLoadIdentity();
glu.gluOrtho2D(0.0, (double) w, 0.0, (double) h);
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glLoadIdentity();
}
public void displayChanged(GLAutoDrawable drawable, boolean modeChanged,
boolean deviceChanged)
{
}
private void setupPointers(GL gl)
{
int vertices[] = new int[]
{ 25, 25, 100, 325, 175, 25, 175, 325, 250, 25, 325, 325 };
float colors[] = new float[]
{ 1.0f, 0.2f, 0.2f, 0.2f, 0.2f, 1.0f, 0.8f, 1.0f, 0.2f, 0.75f, 0.75f,
0.75f, 0.35f, 0.35f, 0.35f, 0.5f, 0.5f, 0.5f };
IntBuffer tmpVerticesBuf = BufferUtil.newIntBuffer(vertices.length);
FloatBuffer tmpColorsBuf = BufferUtil.newFloatBuffer(colors.length);
for (int i = 0; i < vertices.length; i++)
tmpVerticesBuf.put(vertices[i]);
for (int j = 0; j < colors.length; j++)
tmpColorsBuf.put(colors[j]);
tmpVerticesBuf.rewind();
tmpColorsBuf.rewind();
//
gl.glEnableClientState(GL.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL.GL_COLOR_ARRAY);
//
gl.glVertexPointer(2, GL.GL_INT, 0, tmpVerticesBuf);
gl.glColorPointer(3, GL.GL_FLOAT, 0, tmpColorsBuf);
this.verticesBuf = tmpVerticesBuf;
this.colorsBuf = tmpColorsBuf;
}
private void setupInterleave(GL gl)
{
float intertwined[] = new float[]
{ 1.0f, 0.2f, 1.0f, 100.0f, 100.0f, 0.0f, 1.0f, 0.2f, 0.2f, 0.0f, 200.0f,
0.0f, 1.0f, 1.0f, 0.2f, 100.0f, 300.0f, 0.0f, 0.2f, 1.0f, 0.2f, 200.0f,
300.0f, 0.0f, 0.2f, 1.0f, 1.0f, 300.0f, 200.0f, 0.0f, 0.2f, 0.2f, 1.0f,
200.0f, 100.0f, 0.0f };
FloatBuffer tmpIntertwinedBuf = BufferUtil
.newFloatBuffer(intertwined.length);
tmpIntertwinedBuf.rewind();
//
gl.glInterleavedArrays(GL.GL_C3F_V3F, 0, tmpIntertwinedBuf);
this.intertwinedBuf = tmpIntertwinedBuf;
}
public void keyTyped(KeyEvent key)
{
}
public void keyPressed(KeyEvent key)
{
switch (key.getKeyChar()) {
case KeyEvent.VK_ESCAPE:
System.exit(0);
break;
default:
break;
}
}
public void keyReleased(KeyEvent key)
{
}
public void mouseClicked(MouseEvent mouse)
{
}
public void mousePressed(MouseEvent mouse)
{
if (mouse.getButton() == MouseEvent.BUTTON1)
{
if (setupMethod == POINTER)
{
setupMethod = INTERLEAVED;
// setupInterleave(gl);don't call
}
else if (setupMethod == INTERLEAVED)
{
setupMethod = POINTER;
// setupPointers(gl);
}
// validate();
}
if (mouse.getButton() == MouseEvent.BUTTON2
|| mouse.getButton() == MouseEvent.BUTTON3)
{
if (derefMethod == DRAWARRAY) derefMethod = ARRAYELEMENT;
else if (derefMethod == ARRAYELEMENT) derefMethod = DRAWELEMENTS;
else if (derefMethod == DRAWELEMENTS) derefMethod = DRAWARRAY;
// validate();
}
canvas.display();
}
public void mouseReleased(MouseEvent mouse)
{
}
public void mouseEntered(MouseEvent mouse)
{
}
public void mouseExited(MouseEvent mouse)
{
}
}
|
Other API Tips 
You can share your information about this topic using the form below!
Please do not post your questions with this form! Thanks.