void drawArc(Point2 centre, float radius, float startAngle, float sweep)
{
Turtle t;
const int n = 30;
float angle = startAngle * M_PI / 180;
float angleInc = sweep * M_PI / (180 * n);
float cx = centre.getX(), cy = centre.getY();
t.moveTo(Point2(cx + radius*cos(angle), cy + radius*sin(angle)));
for (int k = 1; k < n; k++, angle += angleInc)
{
t.lineTo(Point2(cx + radius*cos(angle), cy + radius*sin(angle)));
}
}
void drawArc(Point centre, float radius, float startAngle, float sweep)
{
Turtle t;
const int n = 30;
float angle = startAngle * M_PI / 180; //convert to radian
float angleInc = sweep * M_PI / (180 * n);
float cx = centre.getX(), cy = centre.getY(); //200,200
float a, b;
a = cx + radius*cos(angle);
b = cy + radius*sin(angle);
t.moveTo(Point(a, b));
for (int k = 1; k < n; k++, angle += angleInc)
{
t.lineTo(Point(cx + radius*cos(angle), cy + radius*sin(angle)));
}
}
/**
The main function begins execution of the program.
*/
int ccc_win_main() {
Turtle myrtle;
double size = 3;
myrtle.moveTo(5 - size / 2, -9); // bottom of drawing area
myrtle.setHeading(90);
for (int i = 3; i < 10; i++) {
drawPolygon(myrtle, size, i);
}
myrtle.moveTo(-4 + size / 2, 1);
myrtle.setHeading(-18);
drawStar(myrtle, size, 5);
myrtle.moveTo(-5, -5); // center of drawing area
myrtle.setHeading(0);
drawRosette(myrtle, size, 40);
myrtle.moveTo(5, 5); // center of drawing area
myrtle.setHeading(90);
drawSpiral(myrtle, .01);
usleep(2000000);
cwin.clear();
myrtle.moveTo(0, -9); // start of drawing area
myrtle.setHeading(0);
tree(myrtle, 10, 7, 60, .6);
usleep(2000000);
cwin.clear();
myrtle.moveTo(-9, -9); // start of drawing area
myrtle.setHeading(90);
koch(myrtle, 5, .25, 80);
usleep(2000000);
cwin.clear();
myrtle.moveTo(4, -8); // start of drawing area
myrtle.setHeading(0);
kochSnowflake(myrtle, 5, .05);
myrtle.sleep(2000);
myrtle.clear();
string input = myrtle.getString("Enter a message: ");
int num1 = myrtle.getInt("Enter an integer number: ");
double num2 = myrtle.getDouble("Enter a double number: ");
myrtle.moveTo("Click mouse to display the message");
myrtle.print(input);
myrtle.moveTo("Click mouse to display the integer number");
myrtle.print(num1);
myrtle.moveTo("Click mouse to display the double number");
myrtle.print(num2);
myrtle.moveTo("Click mouse to display a square");
myrtle.setHeading(0);
myrtle.right(90);
myrtle.forward(5);
myrtle.right(90);
myrtle.forward(5);
myrtle.right(90);
myrtle.forward(5);
myrtle.right(90);
myrtle.forward(5);
}
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;
}