That produced better results, thanks.
I'm now getting (from first iteration of the outside loop):
polyID:0
polyID:1
polyID:6
polyID:7
polyID:8

I know about the 0 instead of i, it was a debug measure to try and get it to work! 

Thank you for making the change, especially at this time of year!
Seasons Greetings, and I hope you have a Happy New Year.

Janine

I initially used 4 for the max-id-number as I thought there would be only 2 or 3 polygons with the same vertex.
I've upped it to 20 and I still get the same result.

Here's my code in case it helps:


int[] polyIDs;
   
SimpleVector[] srcMesh=this.getSourceMesh();
int size=this.getMeshSize();
               
for (int i=0; i<size; i++)
{
     // Get all polygons that share that vertex
     polyIDs = this.getPolygonIDs(0, 20);
   
     for (int j=0; j<polyIDs.length; j++)
     {
          System.out.println("polyID:" + polyIDs[j]);
     }
}



This is what I get printed out:
polyID:0
polyID:0
polyID:0
polyID:0
polyID:0
polyID:0
polyID:0
polyID:0

I've been playing around with the PolygonManager and GenericVertexController to try and determine adjacent polygons in the same plane to a 'selected' polygon.

Looking at the JavaDoc, it seems that the GenericVertexController.getPolygonIDs function should
'Returns the polygon IDs of the polygons that are using the vertex "number".'

However, I don't understand where I would get the 'vertex number' from - just plugging in 0,1,2, random number gets me an array of length 1 with the value of 0 in the array (i.e. a[0]=0).

This doesn't make much sense as my object is a cube, so each polygon vertex should have at least 3 polygons attached to it.

Am I missing something here?

Many thanks,
Janine

Thank you for the explanation, I'll try it as you've suggested.

I've been playing about with PolygonManager and GenericVertexController and have a couple of questions.

I've set up a very simple class the extends GenericVertexController:

public class TestVertexController extends GenericVertexController {

     TestVertexController() {
     }

     public void apply() {
       SimpleVector[] srcMesh=this.getSourceMesh();

       int size=this.getMeshSize();

       for (int i=0; i<size; i++) {
       System.out.println("A" + i + ": (" + srcMesh[i].x + ", " + srcMesh[i].y + ", " + srcMesh[i].z +")");
       
       }
     }
}

I have also put code into the mouse click event to print out vertex info from the PolygonManager:

SimpleVector td  = Interact2D.reproject2D3D(theCamera,frameBuffer,mousePosition.x,mousePosition.y);
int[] res = Interact2D.pickPolygon(theWorld.getVisibilityList(), td, Interact2D.EXCLUDE_NOT_SELECTABLE);

Object3D obj = theWorld.getObject(Interact2D.getObjectID(res));
PolygonManager polyManager = obj.getPolygonManager();
           
SimpleVector v0 = polyManager.getTransformedVertex(res[1], 0);
SimpleVector v1 = polyManager.getTransformedVertex(res[1], 1);
SimpleVector v2 = polyManager.getTransformedVertex(res[1], 2);
                       
System.out.println("V0: (" + v0.x + ", " + v0.y + ", " + v0.z + ")");
System.out.println("V1: (" + v1.x + ", " + v1.y + ", " + v1.z + ")");
System.out.println("V2: (" + v2.x + ", " + v2.y + ", " + v2.z + ")");


When I run the applet, and click on one polygon I get the following:

A0: (2.0, 2.0000002, 2.0000002)
A1: (2.0, 2.0000002, -1.9999996)
A2: (-2.0, 2.0000002, -1.9999996)
A3: (-2.0, 2.0000002, 2.0000002)
A4: (-2.0, -1.9999996, -1.9999998)
A5: (-2.0, -1.9999999, 2.0000002)
A6: (2.0, -1.9999996, -1.9999998)
A7: (1.999998, -2.0000017, 2.0000002)

V0: (2.0000002, 2.0000002, -1.9999999)
V1: (-1.9999998, -1.9999996, -2.0)
V2: (-1.9999998, 2.0000002, -1.9999999)


The problem is that the numbers don't exactly match - is this a rounding problem, or simply a System.out.println problem?

If I did V0.equals(A1) (assuming they were SimpleVector variables) would it return true?
(I know I could write code to compare and find out, but I haven't worked out how to do that yet and it's 4.30pm on Friday evening...)

Many Thanks,
Janine

I thought that might be the case.

Can you point me in the direction of any examples of using vertex & polygon info from the GenericVertexController and the PolygonManager?

As I said, I'm new at this, and would like to see some example code to try and work out what I'm doing 

Hi,

I'm new to 3D and jPCT, and I hope this isn't a really stupid question.

Is is possible to use the mouse to 'select' a side of an object?

For example, a Primitive box has the texture of one side changed when that side is clicked on.

I can use Interact2D functions to get the PolygonID and use PolygonManager.setPolygonTexture to 'select' the polygon I clicked, but how can I also select the adjoining polygons on the same 'face' of the box?

Many thanks,
Janine