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| package book;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLProfile;
import javax.media.opengl.awt.GLJPanel;
import javax.media.opengl.glu.GLU;
import javax.swing.JFrame;
import javax.swing.JPanel;
import com.jogamp.opengl.util.FPSAnimator;
public class Simple2DText extends JFrame implements GLEventListener {
private GLU glu;
private static final double Z_DIST = 7.0; private static Font font;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
Simple2DText frame = new Simple2DText();
frame.add(makeRenderPanel());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
});
}
public void display(GLAutoDrawable drawable) {
GL2 gl = drawable.getGL().getGL2();
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
gl.glLoadIdentity();
glu.gluLookAt(0,0,Z_DIST, 0,0,0, 0,1,0);
}
@Override
public void dispose(GLAutoDrawable arg0) {
}
public void init(GLAutoDrawable drawable) {
GL2 gl = drawable.getGL().getGL2(); glu = new GLU();
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.glEnable(GL.GL_DEPTH_TEST);
drawable.addGLEventListener(this);
FPSAnimator animator = new FPSAnimator(60, true);
animator.start();
}
public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
GL2 gl = drawable.getGL().getGL2();
if (height == 0)height = 1; gl.glViewport(x, y, width, height); gl.glMatrixMode(GL2.GL_PROJECTION);
gl.glLoadIdentity();
glu.gluPerspective(45.0, (float)width/(float)height, 1, 100);
gl.glMatrixMode(GL2.GL_MODELVIEW);
gl.glLoadIdentity();
}
private static JPanel makeRenderPanel() {
font = new Font("SansSerif", Font.BOLD, 48);
JPanel renderPane = new JPanel() {
public void paintComponent(Graphics g){
Graphics2D g2d = (Graphics2D) g;
int width = getWidth();
int height = getHeight();
g2d.setPaint( new GradientPaint(0, 0, Color.YELLOW, width, height, Color.BLUE));
g2d.fillRect(0, 0, width, height);
g2d.setPaint(Color.BLACK);
g2d.setFont(font);
g2d.drawString("Hello World", width/4, height/4);
}
};
renderPane.setLayout(new BorderLayout());
renderPane.setOpaque(false);
renderPane.setPreferredSize(new Dimension(400, 300));
GLCapabilities caps = new GLCapabilities(GLProfile.getDefault());
caps.setAlphaBits(8);
GLJPanel canvas = new GLJPanel(caps);
canvas.setOpaque(false);
renderPane.add(canvas, BorderLayout.CENTER);
return renderPane;
}
} |
