Here is my Test Case.If i try to pick sphere, attached to Foreground node,pick results show null.While the quad attached directly to group gets picked.
package Test;
/**
* @author dprakash
* Picking Test with Foreground node not working.
*/
import java.util.List;
import javax.vecmath.Color3f;
import javax.vecmath.Point3f;
import net.jtank.input.KeyCode;
import org.xith3d.geometry.Quad;
import org.xith3d.geometry.Sphere;
import org.xith3d.picking.PickResult;
import org.xith3d.render.base.Xith3DEnvironment;
import org.xith3d.render.canvas.Canvas3DWrapper;
import org.xith3d.render.canvas.Canvas3DWrapper.Resolution;
import org.xith3d.render.loop.RenderLoop;
import org.xith3d.scenegraph.Foreground;
import org.xith3d.scenegraph.Group;
import org.xith3d.scenegraph.View.CameraMode;
public class ForeGroundPickTest extends RenderLoop {
Canvas3DWrapper canvas;
private Group group;
/**
* Synchronization object to ensure that only one thread has access to pick params
*/
private Object pickParamsMutex = new Object();
private boolean picked = false;
private int pickX;
private int pickY;
private Group createScene() {
group= new Group();
group.setPickable(true);
Sphere sph = new Sphere(10, 10, 1, 20);
sph.setPickable(true);
// group.addChild(sph);
/**
* Attaching the sphere to foreground node then it is not picked.
*/
Group foregroundG = new Group();
foregroundG.addChild(sph);
foregroundG.setPickable(true);
Foreground fg = new Foreground(foregroundG,CameraMode.VIEW_FIXED);
fg.setPickable(true);
group.addChild(fg);
Point3f[] vertexArray={new Point3f(30, 10, 0), new Point3f(50, 10, 0), new Point(50, 40, 0), new Point3f(30, 40, 0)};
Quad quad = new Quad(new Color3f(1, 1, 1),0,vertexArray);
quad.setPickable(true);
group.addChild(quad);
return group;
}
public ForeGroundPickTest() {
Xith3DEnvironment env = new Xith3DEnvironment(this);
env.getView().setScreenScale(100);
env.getView().setProjectionPolicy(env.getView().PARALLEL_PROJECTION);
canvas = Canvas3DWrapper.createStandalone(Resolution.RES_800X600,"Picking test");
this.registerKeyboardAndMouse(canvas);
env.addCanvas(canvas);
env.addChild(createScene());
this.begin();
}
public static void main(String[] args) {
new ForeGroundPickTest();
}
protected void loopIteration(long gameTime, long frameTime)
{
super.loopIteration(gameTime, frameTime);
synchronized (pickParamsMutex)
{
if (picked)
{
// Pick object at mouse point and within 3 pixels around it
System.out.println("Picking at " + pickX + ", " + pickY);
List<PickResult> results = canvas.pickAll(pickX, pickY, 3, 3);
if (results == null)
{
System.out.println("Pick results are null");
}
else
{
System.out.println("Detected " + results.size() + " hits");
int i = 0;
for (PickResult pr: results)
{
System.out.println(" Hit (" + i++ + "): Shape3D: \"" + pr.getShape().toString() );
}
}
picked = false;
}
}
}
public void onMouseButtonPressed(int button, int x, int y) {
// Transfer mouse event parameters to rendering thread
synchronized (pickParamsMutex)
{
this.pickX = x;
this.pickY = y;
picked = true;
}
}
public void onKeyReleased(int key) {
switch (key) {
case KeyCode.VK_ESCAPE:
System.exit(0);
break;
}
}
}
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