Hi,
I was hoping someone may be able to help.
I have a primitive box vrml file which I have loaded into my Java3d
scene and I would like to click on it to get the x,y,z coords.
The x and y coords provided seem fine but I don't understand why the Z
coordinate seems to vary between -1 & 1 depending on where I click the
shapes front face. Surely it should be 1 all over !.
Here is my current pick code:
public void updateScene(int xPos, int yPos) {
//System.out.println("updateScene: ypos= "+yPos);
PickRay pickRay = new PickRay();
PickCanvas pickCanvas = new PickCanvas(canvas3D,branchGroup);
pickCanvas.setMode(PickTool.GEOMETRY_INTERSECT_INFO);
pickCanvas.setTolerance(0.001f); // Set accuracy of pick
// P.C
Point3d eyePos = new Point3d();
canvas3D.getCenterEyeInImagePlate(eyePos);
Point3d mousePos = new Point3d();
canvas3D.getPixelLocationInImagePlate(xPos,yPos,mousePos);
Point3d pickRayOrg = new Point3d();
pickRayOrg.set(eyePos);
pickCanvas.setShape(pickRay,eyePos);
//int num = 0;
pickCanvas.setShapeLocation(xPos, yPos);
try
{
pickResultArray = pickCanvas.pickAllSorted();
}
catch (CapabilityNotSetException cns)
{
System.err.println("Attempting to get pickAllSorted error");
cns.printStackTrace();
System.exit(1);
}
//===================================================================
// PICKING
//===================================================================
if (pickResultArray != null)
{
BranchGroup tempBG =
(BranchGroup)pickResultArray[0].getNode(PickResult.BRANCH_GROUP);
// System.out.println(tempBG.getClass());
// Get Object Data to determine part
shapeClickedBG = (CustomBranchGroup) tempBG;
System.out.println(shapeClickedBG + " "
+shapeClickedBG.id + " type " + shapeClickedBG.type);
if (shapeClickedBG.type != null)
{
//==================================================
// VRML SHAPE - Pick Routine
//=================================================
pickResult = pickResultArray[0];
pickInter =
pickResult.getClosestIntersection(eyePos);
try
{
pickedVec =
pickInter.getPointCoordinates();
}
catch (Exception e)
{
//ignore this error, maybe in a demo ;)
System.err.println("Interrogating Pick
Result Error!");
e.printStackTrace();
System.exit(1);
}
if (addDeleteFn.equals("Add")) {
// add shape
calculateShapeToAdd(pickedVec.x,pickedVec.y, pickedVec.z);
}
else if (addDeleteFn.equals("Delete")) {
// delete shape
}
}
else
{
System.out.println("Null or Geom Shape");
}
//}
} // if pickResultArray
System.out.println("\n");
}
//======================================================================
===
Thanks
Paul
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