Cylinder Mesh Example

#include "ofApp.h"

void ofApp::setup() {
    ofSetVerticalSync(true);
    int rings = 32, resolution = 32;
    float length = 256, maxRadius = 128;
    for(int i = 0; i < rings; i++) {
        float radius = ofNoise(i / 4.) * maxRadius;
        ofVec3f offset(0, 0, ofMap(i, 0, rings, -length, length) / 2);
        for(int j = 0; j < resolution; j++) {
            float theta = ofMap(j, 0, resolution, 0, 360);
            ofVec2f cur(radius, 0);
            cur.rotate(theta);
            mesh.addVertex(offset + cur);
            mesh.addColor(ofColor((i * j) % 2 == 0 ? 255 : 0));
        }
    }

    for(int i = 0; i < rings - 1; i++) {
        for(int j = 0; j < resolution; j++) {
            int sw = i * resolution + j, se = sw + 1;
            if(j + 1 == resolution) {
                se -= resolution;
            }
            int nw = sw + resolution, ne = se + resolution;
            mesh.addTriangle(sw, se, nw);
            mesh.addTriangle(nw, se, ne);
        }
    }

    mesh.setMode(OF_PRIMITIVE_TRIANGLES);
}

void ofApp::update() {

}

void ofApp::draw() {
    ofBackground(0);
    cam.begin();
    glEnable(GL_DEPTH_TEST);
    ofSetColor(255);
    ofRotateY(90);
    mesh.draw();
    cam.end();
}