Hi, I'm new to Processing and I need to create a 3d cylinder object, I have no idea how to create one of these, I looked through the reference but cant see how to create one, thank you in advance.

p.s. Is it possible to create a cylinder object with a hole in the middle too?

[edit]I also have a problem that one of my polygons is transparent when it shouldnt be, I've called the fill() method, but it wont fill that polygon

that's already done mflux

http://toxi.co.uk/p5/cylinder/

this features a generic cylinder/cone generator with optional caps and flexible vertex resolution.

demo controls: horizontal mouse pos = change resolution, left click = show caps

Thats a good example but I need a more solid open cylinder (Like a car tyre), can anyone help me with the edited problem, some of my polygons are appearing translucent instead of the fill colour.

I could make do with an ordinary shaped cylinder (Like a jar of something).

Thanks for the help so far

The polygon problem is sorted, I changed it from polygon to quads and triangles.

Still cant build a solid cylinder though like the one here:
http://www.econym.demon.co.uk/isotut/cylinder.jpg

For whatever it's worth, here's a simple cylinder routine that renders solid and smooth; works with P3D and OPENGL.  Obviously, just up the point count and you'll increase smoothness (with a performance hit of course.)

/*
Simple Cylinder
Ira Greenberg, November 27, 2005
*/
import processing.opengl.*;

float radius = 100;
float ang = 0, ang2 = 0;
int pts = 120;
float depth = 200;

void setup(){
 size(400, 400, OPENGL);
 //size(400, 400, P3D);
 background(50);
 fill(150);
 smooth();  // comment out with P3D renderer
 noStroke();
 framerate(30);
}

void draw(){
 background(50);
 directionalLight(166, 166, 196, -60, -60, -60);
 ambientLight(105, 105, 130);
 translate(width/2, height/2, -200);
 rotateY(ang2);
 rotateX(ang2*2);
 rotateZ(ang2);
 
 //body
 beginShape(QUAD_STRIP);
 for (int i=0; i<=pts; i++){
   float  px = cos(radians(ang))*radius;
   float  py = sin(radians(ang))*radius;
   vertex(px, py, depth);
   vertex(px, py, -depth);
   ang+=360/pts;
 }
 endShape();
 
 //cap 1
 beginShape(POLYGON);
 for (int i=0; i<=pts; i++){
   float  px = cos(radians(ang))*radius;
   float  py = sin(radians(ang))*radius;
   vertex(px, py, depth);
   ang+=360/pts;
 }
 endShape();

 //cap2
 beginShape(POLYGON);
 for (int i=0; i<=pts; i++){
   float  px = cos(radians(ang))*radius;
   float  py = sin(radians(ang))*radius;
   vertex(px, py, -depth);
   ang+=360/pts;
 }
 endShape();
 
 ang2+=PI/120; //for rotation
}