Screenshot: using two contexts to display the same scene from different angles,
this is the code that uses the system to do it:
package com.gibbon.mfkarpg.core;
import com.gibbon.mfkarpg.core.context.*;
import com.gibbon.mfkarpg.core.context.lwjgl.*;
import com.jme.image.Texture;
import com.jme.light.PointLight;
import com.jme.math.FastMath;
import com.jme.math.Vector3f;
import com.jme.renderer.Camera;
import com.jme.renderer.ColorRGBA;
import com.jme.scene.Node;
import com.jme.scene.shape.RoundedBox;
import com.jme.scene.state.LightState;
import com.jme.scene.state.RenderState;
import com.jme.scene.state.TextureState;
import com.jme.scene.state.ZBufferState;
import com.jme.system.PreferencesGameSettings;
import com.jme.util.TextureManager;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.util.prefs.Preferences;
import javax.swing.JFrame;
public class View3D extends javax.swing.JDialog {
private int width, height;
private JmeContext context;
public View3D(JFrame parent, int width, int height) {
super(parent, false);
this.width=width;
this.height=height;
initComponents();
}
public JmeContext getContext(){
return context;
}
private static class RotatingBox extends RenderPass {
private float angle = 0;
private Node root;
private ColorRGBA background;
private boolean rotateScene = false;
public RotatingBox(Node root, ColorRGBA bgColor, boolean rotateScene){
super();
background = bgColor;
this.rotateScene = rotateScene;
this.root = root;
add(root);
}
public void initPass(JmeContext context){
super.initPass(context);
context.getRenderer().setBackgroundColor(background);
Camera cam = context.getRenderer().getCamera();
if (rotateScene){
cam.setLocation(new Vector3f(5,5,5));
}else{
// use a different angle if we are the 2nd canvas
cam.setLocation(new Vector3f(5,7,2));
}
cam.lookAt(Vector3f.ZERO,Vector3f.UNIT_Y);
}
public void doUpdate(JmeContext context){
super.doUpdate(context);
if (rotateScene){
angle += FastMath.PI * context.getPassManager().getTPF();
if (angle > FastMath.TWO_PI){
angle -= FastMath.TWO_PI;
}
root.getLocalRotation().fromAngles(angle,0,0);
}
}
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents() {
gl = createCanvas();
setDefaultCloseOperation(javax.swing.WindowConstants.DO_NOTHING_ON_CLOSE);
setFocusable(false);
setFocusableWindowState(false);
setName("view3d");
setResizable(false);
setUndecorated(true);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(gl, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(gl, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 300, Short.MAX_VALUE)
);
pack();
}// </editor-fold>
protected LWJGLCanvas canvas;
protected LWJGLCanvas createCanvas(){
try {
if (JmeContext.get()!=null){
// share with the previous context
context = JmeContext.create(JmeContext.getDefaultImplementorClassName(),
JmeContext.CONTEXT_CANVAS,
JmeContext.get());
}else{
context = JmeContext.create(JmeContext.getDefaultImplementorClassName(),
JmeContext.CONTEXT_CANVAS);
}
} catch (InstantiationException ex) {
ex.printStackTrace();
return null;
}
context.start();
canvas = (LWJGLCanvas) context.getCanvas();
return canvas;
}
public static void main(String[] args){
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
View3D view1 = new View3D(null,320,240);
View3D view2 = new View3D(null,320,240);
view1.setLocation((int)(d.getWidth() / 2 - view1.getWidth()) - 120, (int)(d.getHeight() / 2 - view1.getHeight() / 2));
view1.setVisible(true);
view2.setLocation((int)(d.getWidth() / 2) + 120, (int)(d.getHeight() / 2 - view2.getHeight() / 2));
view2.setVisible(true);
JmeContext context = JmeContext.get();
try {
// makes sure DisplaySystem.getDisplaySystem().getRenderer() is not null
context.waitFor();
} catch (InterruptedException ex) {
ex.printStackTrace();
}
Node root = new Node("root");
RoundedBox box = new RoundedBox("Box");
box.setLocalScale(3);
root.attachChild(box);
LightState ls = context.getRenderer().createLightState();
PointLight pl = new PointLight();
pl.setSpecular(ColorRGBA.white);
pl.setDiffuse(ColorRGBA.yellow);
pl.setAmbient(ColorRGBA.darkGray);
pl.setEnabled(true);
pl.setLocation(new Vector3f(-5,5,5));
ls.attach(pl);
root.setRenderState(ls);
ZBufferState buf = context.getRenderer().createZBufferState();
buf.setFunction(ZBufferState.CF_LEQUAL);
buf.setWritable(true);
root.setRenderState(buf);
TextureState ts = JmeContext.get().getRenderer().createTextureState();
Texture t = TextureManager.loadTexture(
View3D.class.getClassLoader().getResource("jmetest/data/images/Monkey.jpg"));
ts.setTexture(t);
root.setRenderState(ts);
root.updateRenderState();
root.updateGeometricState(0,true);
view1.getContext().getPassManager().add(new RotatingBox(root,ColorRGBA.red,true));
view2.getContext().getPassManager().add(new RotatingBox(root,ColorRGBA.green,false));
}
// Variables declaration - do not modify
private java.awt.Canvas gl;
// End of variables declaration
}
