package glredbook10;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.nio.*;
import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import com.sun.opengl.util.*;
/**
* This program draws a texture mapped teapot with automatically generated
* texture coordinates. The texture is rendered as stripes on the teapot.
*
* @author Kiet LE (java port)
*/
public class texgen
extends JFrame
implements GLEventListener, KeyListener
{
private GLU glu;
private GLUT glut;
private GLCapabilities caps;
private GLCanvas canvas;
private FPSAnimator animator;
private static final int stripeImageWidth = 32;
private byte stripeImage[] = new byte[3 * stripeImageWidth];
private ByteBuffer stripeImageBuf = BufferUtil
.newByteBuffer(stripeImage.length);
/* glTexGen stuff: */
private float sgenparams[] =
{ 1.0f, 1.0f, 1.0f, 0.0f };
public texgen()
{
super("texgen");
caps = new GLCapabilities();
canvas = new GLCanvas(caps);
canvas.addGLEventListener(this);
canvas.addKeyListener(this);
getContentPane().add(canvas);
}
public void run()
{
setSize(200, 200);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
canvas.requestFocusInWindow();
}
public static void main(String[] args)
{
new texgen().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);
makeStripeImage();
gl.glPixelStorei(GL.GL_UNPACK_ALIGNMENT, 1);
gl.glTexEnvf(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_MODULATE);
gl.glTexParameterf(GL.GL_TEXTURE_1D, GL.GL_TEXTURE_WRAP_S, GL.GL_REPEAT);
gl.glTexParameterf(GL.GL_TEXTURE_1D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
gl.glTexParameterf(GL.GL_TEXTURE_1D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR);
gl.glTexImage1D(GL.GL_TEXTURE_1D, 0, 3, stripeImageWidth, 0, GL.GL_RGB,
GL.GL_UNSIGNED_BYTE, stripeImageBuf);
gl.glTexGeni(GL.GL_S, GL.GL_TEXTURE_GEN_MODE, GL.GL_OBJECT_LINEAR);
gl.glTexGenfv(GL.GL_S, GL.GL_OBJECT_PLANE, sgenparams, 0);
gl.glEnable(GL.GL_DEPTH_TEST);
gl.glDepthFunc(GL.GL_LESS);
gl.glEnable(GL.GL_TEXTURE_GEN_S);
gl.glEnable(GL.GL_TEXTURE_1D);
gl.glEnable(GL.GL_CULL_FACE);
gl.glEnable(GL.GL_LIGHTING);
gl.glEnable(GL.GL_LIGHT0);
gl.glEnable(GL.GL_AUTO_NORMAL);
gl.glEnable(GL.GL_NORMALIZE);
gl.glFrontFace(GL.GL_CW);
gl.glCullFace(GL.GL_BACK);
gl.glMaterialf(GL.GL_FRONT, GL.GL_SHININESS, 64.0f);
}
public void display(GLAutoDrawable drawable)
{
GL gl = drawable.getGL();
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
gl.glPushMatrix();
gl.glRotatef(45.0f, 0.0f, 0.0f, 1.0f);
glut.glutSolidTeapot(2.0f);
gl.glPopMatrix();
gl.glFlush();
}
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();
if (w <= h) gl.glOrtho(-3.5, 3.5, -3.5 * (float) h / (float) w,
3.5 * (float) h / (float) w, -3.5, 3.5);
else gl.glOrtho(-3.5 * (float) w / (float) h, //
3.5 * (float) w / (float) h, -3.5, 3.5, -3.5, 3.5);
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glLoadIdentity();
}
public void displayChanged(GLAutoDrawable drawable, boolean modeChanged,
boolean deviceChanged)
{
}
private void makeStripeImage()
{
for (int j = 0; j < stripeImageWidth; j++)
{
// stripeImage[3 * j] = (j <= 4) ? 255 : 0;
// stripeImage[3 * j + 1] = (j > 4) ? 255 : 0;
// stripeImage[3 * j + 2] = 0;
stripeImageBuf.put(((j <= 4) ? (byte) 255 : (byte) 0));
stripeImageBuf.put(((j > 4) ? (byte) 255 : (byte) 0));
stripeImageBuf.put((byte)0);
}
stripeImageBuf.rewind();
}
public void keyTyped(KeyEvent key)
{
}
public void keyPressed(KeyEvent key)
{
switch (key.getKeyCode()) {
case KeyEvent.VK_ESCAPE:
System.exit(0);
break;
default:
break;
}
}
public void keyReleased(KeyEvent key)
{
}
}
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