// Recursive Koch fractal
void koch(Turtle& turtle, int level, double size, double angle) {
if (level == 0) {
turtle.forward(size);
} else {
koch(turtle, level - 1, size, angle);
turtle.left(angle);
koch(turtle, level - 1, size, angle);
turtle.right(angle);
turtle.right(angle);
koch(turtle, level - 1, size, angle);
turtle.left(angle);
koch(turtle, level - 1, size, angle);
}
}
// Recursive fractal "tree" structure
void tree(Turtle& turtle, int level, double size, double angle,
double scale) {
if (level == 0) {
turtle.forward(size);
turtle.backward(size);
} else {
turtle.forward(size);
turtle.left(angle);
tree(turtle, level - 1, size * scale, angle, scale);
turtle.right(angle);
turtle.right(angle);
tree(turtle, level - 1, size * scale, angle, scale);
turtle.left(angle);
turtle.backward(size);
}
}
void drawStar(Turtle& turtle, double size, int sides) {
for (int i = 0; i < sides; i++) {
turtle.forward(size);
turtle.right(360.0 / sides);
turtle.forward(size);
turtle.left(2 * 360.0 / sides);
}
}
// Use Koch fractal to draw a "snowflake"
void kochSnowflake(Turtle& turtle, int level, double size) {
double angle = 60;
turtle.left(angle);
koch(turtle, level, size, angle);
turtle.right(angle);
turtle.right(angle);
koch(turtle, level, size, angle);
turtle.right(angle);
turtle.right(angle);
koch(turtle, level, size, angle);
}
void symetric_star(int number_of_sides, const int IMAGE_SIZE, std::string file_name){
Turtle turtle (IMAGE_SIZE/2,IMAGE_SIZE/2,IMAGE_SIZE);
int angle = 180 - 180/number_of_sides;
turtle.pendown();
for (int x = 0; x < number_of_sides; ++x)
{
turtle.left(angle);
turtle.forward(5);
}
turtle.save(file_name);
}
int ccc_win_main() {
Turtle t;
bool running = true;
while (running == true) {
double sides = -1;
while (sides < 1) {
sides = t.getInt("Enter number of sides:");
}
double length = t.getDouble("Enter length of sides:");
if (sides > 1) {
int degrees = DEGREES_IN_CIRCLE / sides;
t.setHeading(LEFT);
/*
Apothem is the distance of the normal of any side of the polygon
to the centerpoint of the polygon. The following code will
center the shape in the window.
*/
double apothem = length / (2 * tan(PI / sides));
t.moveTo(length / 2, -apothem);
int i = 0;
while (i < sides) {
t.forward(length);
t.right(degrees);
i++;
}
}
if (sides == 1) {
t.setHeading(0);
// Creates the upper case letter M.
t.moveTo(NTHREE,NNINE);
t.right(TEN);
t.forward(FORWARD_INC);
t.right(G_TURN2);
t.forward(FORWARD_INC);
t.left(G_TURN2);
t.forward(FORWARD_INC);
t.right(G_TURN2);
t.forward(FORWARD_INC);
// Creates the upper case letter G.
t.moveTo(SEVEN_POINT_FIVE, N_ONE_POINT_FIVE);
t.left(G_TURN);
t.forward(2);
t.backward(2);
t.right(ONE_THIRTY);
t.forward(2);
t.left(G_TURN);
t.forward(2);
t.left(G_TURN);
t.forward(2);
t.left(G_TURN);
t.forward(2);
t.left(G_TURN);
t.forward(2);
t.left(G_TURN);
t.forward(2);
t.left(G_TURN);
t.forward(2);
t.left(SMALL_TURN);
t.forward(1);
t.left(SMALL_TURN);
t.forward(1);
t.left(SMALL_TURN);
t.forward(1);
t.left(SMALL_TURN);
t.forward(1);
t.backward(2);
// Creates the upper case letter J.
t.setHeading(RIGHT_TURN);
t.moveTo(NSEVEN, FIVE);
t.forward(2);
t.right(STRAIGHT);
t.forward(1);
t.left(RIGHT_TURN);
t.forward(2);
t.right(RIGHT_TURN);
t.forward(1);
// Creates the upper case letter W.
t.moveTo(-FOUR, FIVE);
t.right(TWO_THIRTY);
t.forward(W_INC);
t.left(RIGHT_TURN);
t.forward(2);
t.right(RIGHT_TURN);
t.forward(2);
t.left(RIGHT_TURN);
t.forward(W_INC);
// Creates the upper case letter C.
t.moveTo(FOUR, FIVE);
t.right(C_TURN);
t.forward(2);
t.right(STRAIGHT);
t.forward(2);
t.left(RIGHT_TURN);
t.forward(2);
t.left(RIGHT_TURN);
t.forward(2);
}
string repeat = t.getString("Do you wish to continue (y/n)? ");
if (repeat != "y") running = false;
else t.clear();
}
cout << "Exiting Program.\n";
exit(0);
return 0;
}
void drawPolygon(Turtle& turtle, double size, int sides) {
double angle = 360.0 / sides;
for (int count = 0; count < sides; count++) {
turtle.forward(size);
turtle.left(angle);
}
}