Menger sponge CPU ofMesh

main.cpp

#include "ofMain.h"

class Menger : public ofBaseApp{
        public:
        ofEasyCam cam;
        ofMesh mesh;

        void setup() {
                mesh = sponge(10,10,10,500,3,2);
        }

        void draw() {
                ofSetWindowTitle(ofToString(ofGetFrameRate()));
                ofBackgroundGradient(ofColor(100),ofColor(0),OF_GRADIENT_CIRCULAR);
                ofEnableDepthTest();
                cam.begin();
                        ofSetColor(0,0,200);
                        mesh.draw();
                        ofSetColor(0);
                        ofSetLineWidth(2.5);
                        mesh.drawWireframe();
                cam.end();
                ofDisableDepthTest();
        }

        ofVboMesh mh;
        ofVboMesh sponge(float x, float y, float z, float s, int n, int t) {
                 if(n>0) {
                     n--;
                     float u = s/t;
                     for(float i=-u; i<=u; i+=u)
                        for(float j=-u; j<=u; j+=u)
                           for(float k=-u; k<=u; k+=u)
                             if(abs(i) + abs(j) + abs(k) >= 2*u){
                                  sponge(x+i, y+j, z+k, u, n, t);
                             }
                 }
                 else {
                     ofBoxPrimitive b;
                     b.set(s);
                     for(int i = 0;i < b.getMesh().getVertices().size();i++)
                     {
                        b.getMesh().getVertices()[i] += ofVec3f(x,y,z);
                     }
                     ofMesh m;
                     m = b.getMesh();
                     mh.append(m);
                 }
                 return mh;
        }
};

int main()
{
        ofSetupOpenGL(1280, 720, OF_WINDOW);
        ofRunApp(new Menger());
}