Using ofNode to build an L-System

@arturo Do you mean something like this?

    for (int i = 0; i < _instruction.length(); i++) {
        char c = _instruction[i];
        if (c == 'F') {
            branching = true;
        }else if (c == '+') {
            auto jointBranch = Branch();
            jointBranch.setParent(branch);
            jointBranch.roll(45);
            auto branch = Branch();
            branch.setParent(jointBranch);
        }

        if(branching){
            if(mesh.getNumVertices() == 0){
                //add the first branch to the root
                branch.move(ofVec3f(0, -100, 0));
                mesh.addVertex(branch.getGlobalPosition());
                mesh.addColor(ofFloatColor(1.0, 1.0, 0.0));
                branching = false;
            }else{
                //add a new branch
                auto oldBranch = Branch(branch);
                auto branch = Branch();
                branch.setParent(oldBranch);
                branch.move(ofVec3f(0, -100,0));
                mesh.addVertex(branch.getGlobalPosition());
                mesh.addColor(ofFloatColor(1.0, 1.0, 0.0));
                branching = false;
            };
        }

This is also not working, i think the problem is re-assigning a ofNode. This is the output of this code:

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