//generates a mesh from a l system ruleset
public Mesh MeshFromRuleset(int idx)
{
//create L system
LSystem ls = new LSystem(_rulesets[idx]._axiom, _iterationCount, _rulesets[idx]);
string lSystemOutput = ls.Generate();
//use turtle to create mesh of L system
Turtle turtle = new Turtle(_rulesets[idx]._angle);
turtle.Decode(lSystemOutput);
turtle.CreateMesh();
Mesh mesh = turtle._finalMesh;
return(mesh);
}