// This gets called by the constructor, hopefully only
// once but it can be called at any time. Called prior to any
// Window creation so it can only set variables, not draw things
public void init() {
/* initialize the widget */
int width = gl.getWidth();
int height = gl.getHeight();
// Initialize the rendering viewport size to OpenGL
gl.viewport(0, 0, width, height);
gl.matrixMode(GL.PROJECTION); // Set up the camera mode
gl.loadIdentity(); // Reset the transformation matrix
if (width <= height)
gl.ortho(
-50.0,
50.0,
-50.0 * (double) height / (double) width,
50.0 * (double) height / (double) width,
-1.0,
1.0);
else
gl.ortho(
-50.0 * (double) width / (double) height,
50.0 * (double) width / (double) height,
-50.0,
50.0,
-1.0,
1.0);
gl.matrixMode(GL.MODELVIEW); // Reset to model transforms
}
// Handle the keystrokes
public void keyTyped(KeyEvent e) {
switch (e.getKeyChar()) {
case 'h':
gl.matrixMode(GL.MODELVIEW); /* manipulate modelview matrix */
gl.rotate(15.0, 0.0, 1.0, 0.0);
break;
case 'j':
gl.matrixMode(GL.MODELVIEW); /* manipulate modelview matrix */
gl.rotate(15.0, 1.0, 0.0, 0.0);
break;
case 'k':
gl.matrixMode(GL.MODELVIEW); /* manipulate modelview matrix */
gl.rotate(-15.0, 1.0, 0.0, 0.0);
break;
case 'l':
gl.matrixMode(GL.MODELVIEW); /* manipulate modelview matrix */
gl.rotate(-15.0, 0.0, 1.0, 0.0);
break;
case '+':
gl.matrixMode(GL.PROJECTION); /* manipulate Projection matrix */
gl.translate(0.0, 0.0, 0.5);
e.consume();
break;
case '-':
gl.matrixMode(GL.PROJECTION); /* manipulate Projection matrix */
gl.translate(0.0, 0.0, -0.5);
e.consume();
break;
case 's':
if (r_thread == null) {
r_thread = new Thread(this);
r_thread.start();
}
break;
case 'p':
if (r_thread != null) {
r_thread.interrupt();
r_thread = null;
}
break;
case 27: /* Esc will quit */
System.exit(1);
break;
default:
break;
}
e.consume();
display();
}
