Re: [JAVA3D] Tutorial question

[Andy]

Thank you very  much, here is my new code which works.

private BranchGroup createCone(){
                BranchGroup root = new BranchGroup();

                // CREATE ALL TRIANGLES //
                TriangleFanArray tfa;
                int s = 8;
                int v = s + 1;
                int totalV = v + 1;
                Point3f coords[] = new Point3f[v+1];
                int stripCounts[] = {10};
                float r = 0.5f;
                float x, y;
                double angle = 360 / s;

                coords[0] = new Point3f(0.0f, 0.0f, 0.0f);

                for(int a = 1, n = 0; a <= s; a++, n++){
                        x = r * EngMath.cos(n*angle);
                        y = r * EngMath.sin(n*angle);

                        coords[a] = new Point3f(x, y, 0.0f);
                }

                coords[9] = coords[1];

                tfa = new TriangleFanArray(10, TriangleFanArray.COORDINATES,
stripCounts);
                tfa.setCoordinates(0, coords);
                root.addChild(new Shape3D(tfa));
                return root;
        }

O....one more question, strip you said is referring to the Fan, not to the
line between two points?

Sincerely,

Andy

----- Original Message -----
From: "Carlos D Correa" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, October 02, 2002 11:09 AM
Subject: Re: [JAVA3D] Tutorial question


> Hi,
>
> When you set the stripCounts Array, it specifies how many vertices are
> in each separate strip (or fan). So, the sum of values in stripCounts
> should be the same as the number of points.
>
> Instead of stripCounts of 17, use:
>
> int stripCounts[] = {10};       // your only strip has 10 vertices
>
> Also, you don't need to include vertex  (0,0,0) again in the fan.
>
> _______
> Carlos
>
>
> Andy wrote:
>
> >Hi Java3D Dev Team:
> >
> >In Tutorial 2, it shows that TriangleFanArray is having a parameter of
> >vertexCount which is TriangleFanArray(vertexCount....).  However, is this
> >vertexCount or stripCount?  Since I created a Fan with 10
points(vertices)
> >only including the central point, I should have this ".....= new
> >TriangleFanArray(10, TriangleFanArray.COORDINATES, stripCounts);" instead
of
> >"....=new TriangleFanArray(17....);".  However, if I make it 10, it will
> >have runtime error.  What is the problem?  Here is my source code:
> >
> >private BranchGroup createCone(){
> >                BranchGroup root = new BranchGroup();
> >
> >                // CREATE ALL TRIANGLES //
> >                TriangleFanArray tfa;
> >                int s = 8;
> >                int v = s + 1;
> >                int totalV = v + 1;
> >                Point3f coords[] = new Point3f[v+1];
> >                int stripCounts[] = {17};
> >                float r = 0.5f;
> >                float x, y;
> >                double angle = 360 / s;
> >
> >                coords[0] = new Point3f(0.0f, 0.0f, 0.0f);
> >
> >                for(int a = 1, n = 0; a <= s; a++, n++){
> >                        x = r * EngMath.cos(n*angle);
> >                        y = r * EngMath.sin(n*angle);
> >
> >                        coords[a] = new Point3f(x, y, 0.0f);
> >                }
> >
> >                coords[9] = new Point3f(0.0f, 0.0f, 0.0f);
> >
> >                tfa = new TriangleFanArray(10,
TriangleFanArray.COORDINATES,
> >stripCounts);
> >                tfa.setCoordinates(0, coords);
> >                root.addChild(new Shape3D(tfa));
> >                return root;
> >        }
> >
> >Please help.  Thanks.
> >
> >Andy
> >
>
>===========================================================================
> >To unsubscribe, send email to [EMAIL PROTECTED] and include in the
body
> >of the message "signoff JAVA3D-INTEREST".  For general help, send email
to
> >[EMAIL PROTECTED] and include in the body of the message "help".
> >
>
>
===========================================================================
> To unsubscribe, send email to [EMAIL PROTECTED] and include in the
body
> of the message "signoff JAVA3D-INTEREST".  For general help, send email to
> [EMAIL PROTECTED] and include in the body of the message "help".

===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff JAVA3D-INTEREST".  For general help, send email to
[EMAIL PROTECTED] and include in the body of the message "help".