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hilbertCurve.cpp
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hilbertCurve.cpp
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//Hilbert Curve
#include <string>
#include <iostream>
#include <fstream>
#include <cmath>
std::string subLineA(int n);
std::string subLineB(int n);
std::string drawCurve(int n){
//draw starting curve
return subLineA(n);
}
// left side of the curve
std::string subLineA(int n){
// base case
if (n == 0) {
return "";
}
// if not on last iteration create left and right sides & attach them together
else {
std::string A = subLineA(n-1);
std::string B = subLineB(n-1);
return "- " + B + "F " + "+ " + A + "F " + A + "+ " + "F " + B + "- ";
}
}
// right side of the curve
std::string subLineB(int n){
// base case
if (n == 0) {
return "";
}
// this is where we call the recursive method
else {
std::string A = subLineA(n-1);
std::string B = subLineB(n-1);
return "+ " + A + "F " + "- " + B + "F " + B + "- " + "F " + A + "+ ";
}
}
void save(std::string filename, std::string Lsystem){
//write commands to file
std::ofstream file;
file.open(filename);
file << Lsystem;
file.close();
}
int main(int argc, char **argv){
//amount of times it goes
int n = std::stoi(argv[1]);
std::string Lsystem = drawCurve(n);
save("l-system.txt", Lsystem);
}