Koch-class-main.cpp

/* Author: Jesse W. Walker
 * Derived from Jan Pearce's Python code at
   http://cs.berea.edu/courses/csc226/tasks/koch.py
 */

#include "CTurtle.hpp"
namespace ct = cturtle;

class koch {
public:
    koch(ct::Turtle& turtle, int order, int size, int x, int y, ct::Color color)
        : turtleRef(turtle) {
        this->order = order;
        this->size = size;
        this->x = x;
        this->y = y;
        this->color = color;
        moveto();
    }

    koch(ct::Turtle& turtle) : turtleRef(turtle) {
        this->order = 3;
        this->size = 200;
        this->x = -250;
        this->y = 0;
        this->color = { "black" };
        moveto();
    }

    void moveto() {
        turtleRef.penup();
        turtleRef.goTo(x, y);
        turtleRef.pendown();
    }

    void draw_koch(int newOrder, int newSize) {
        const int ANGLES[] = { 60, -120, 60, 0 };

        turtleRef.pencolor(color);
        if (newOrder == 0) {
            turtleRef.forward(newSize);
        }
        else {
            for (int i = 0; i < 4; i++) {
                draw_koch(newOrder - 1, newSize / 3);
                turtleRef.left(ANGLES[i]);
            }
        }
    }

    inline void draw_koch() {
        draw_koch(order, size);
    }

    void snowflake() {
        for (int i = 0; i < 3; i++) {
            draw_koch();
            turtleRef.right(120);
        }
    }

private:
    int order;
    int size;
    int x;
    int y;

    ct::Color color;
    ct::Turtle& turtleRef;
};

int main() {
    ct::TurtleScreen scr;
    ct::Turtle turtle(scr);

    koch k(turtle);
    k.snowflake();

    scr.exitonclick();
    return 0;
}