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package com.mbien.opencl.demos.joglinterop;
import java.awt.Component;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import javax.media.opengl.GL2;
/**
* Utility class for interacting with a scene. Supports rotation and zoom around origin.
* @author Michael Bien
*/
public class UserSceneInteraction {
private float z = -20;
private float rotx;
private float roty;
private Point dragstart;
private enum MOUSE_MODE { DRAG_ROTATE, DRAG_ZOOM }
private MOUSE_MODE dragmode = MOUSE_MODE.DRAG_ROTATE;
public void init(Component component) {
initMouseListeners(component);
}
private void initMouseListeners(Component component) {
component.addMouseMotionListener(new MouseMotionAdapter() {
@Override
public void mouseDragged(MouseEvent e) {
if (dragstart != null) {
switch (dragmode) {
case DRAG_ROTATE:
rotx += e.getY() - dragstart.getY();
roty += e.getX() - dragstart.getX();
break;
case DRAG_ZOOM:
z += (e.getY() - dragstart.getY()) / 5.0f;
break;
}
}
dragstart = e.getPoint();
}
});
component.addMouseWheelListener(new MouseWheelListener() {
public void mouseWheelMoved(MouseWheelEvent e) {
z += e.getWheelRotation()*5;
}
});
component.addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
switch (e.getButton()) {
case (MouseEvent.BUTTON1):
dragmode = MOUSE_MODE.DRAG_ROTATE;
break;
case (MouseEvent.BUTTON2):
dragmode = MOUSE_MODE.DRAG_ZOOM;
break;
case (MouseEvent.BUTTON3):
dragmode = MOUSE_MODE.DRAG_ZOOM;
break;
}
}
@Override
public void mouseReleased(MouseEvent e) {
switch (e.getButton()) {
case (MouseEvent.BUTTON1):
dragmode = MOUSE_MODE.DRAG_ZOOM;
break;
case (MouseEvent.BUTTON2):
dragmode = MOUSE_MODE.DRAG_ROTATE;
break;
case (MouseEvent.BUTTON3):
dragmode = MOUSE_MODE.DRAG_ROTATE;
break;
}
dragstart = null;
}
});
}
public void interact(GL2 gl) {
gl.glTranslatef(0, 0, z);
gl.glRotatef(rotx, 1f, 0f, 0f);
gl.glRotatef(roty, 0f, 1.0f, 0f);
}
}
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