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sierpinskiCurve.cpp
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sierpinskiCurve.cpp
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// sierpinski curve
// python3 l-system-plotter.py l-system.txt sCurve.txt 60
#include <string>
#include <iostream>
#include <fstream>
#include <cmath>
std::string subLineA(int n);
std::string subLineB(int n);
std::string drawCurve(int n){
// draw curve
return subLineA(n);
}
std::string subLineA(int n){
// base case left side
if (n == 0) {
return "F ";
}
// this is where we call the recursive method
else {
std::string A = subLineA(n-1);
std::string B = subLineB(n-1);
return B + "-" + A + "-" + B;
}
}
std::string subLineB(int n){
// base case right side
if (n == 0) {
return "F ";
}
// this is where we call the recursive method
else {
std::string A = subLineA(n-1);
std::string B = subLineB(n-1);
return A + "+" + B + "+" + 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 iterates
int n = std::stoi(argv[1]);
std::string Lsystem = drawCurve(n);
//save the text file
save("l-system.txt", Lsystem);
}