arcRight
Category:Turtle
The turtle is not limited to only moving in a straight line. arcRight(angle,radius) moves the turtle clockwise along an angle degree arc of a radius sized circle. The center of the circle is radius pixels to the right of the starting turtle position and direction.
Examples
Example: One Arc
// Draw a quarter circle clockwise.
arcRight(90, 25);
Example: Frown
Draw a frown to the right.
// Draw a frown to the right.
penWidth(10);
arcRight(180, 50);
Example: U-Turn
Smoothly turn the turtle around.
// Smoothly turn the turtle around.
arcLeft(60, 25); // Turn left a bit
arcRight(300, 25); // Turn almost all the way
arcLeft(60, 25); // Straighten out
Example: Radioactive
Draw the radioactive symbol by coloring in segments of a circle using arcRight and small changes in radius.
// Draw the radioactive symbol by coloring in segments of a circle using arcRight and small changes in radius.
hide();
penWidth(1);
for (var radius=50; radius>0; radius=radius-1) {
for (var count=1; count<=3; count++) {
penColor("yellow");
arcRight(60, radius);
penColor("black");
arcRight(60, radius);
}
move(1,0);
}
penColor("yellow");
dot(15);
penColor("black");
dot(10);
Syntax
arcRight(angle, radius);
Parameters
| Name | Type | Required? | Description |
|---|---|---|---|
| angle | number | The angle degree arc to move the turtle clockwise in a circle. | |
| radius | number | The radius of the circle that is placed right of the turtle. radius must be >= 0. |
Returns
No return value. Moves turtle only.
Tips
- Use penUp() before calling arcLeft() to have the turtle not draw as it moves.
- You can specify a radius of 0, which makes arcRight() act the same as turnRight().
- Use alternating with arcLeft() to make wavy lines.
Found a bug in the documentation? Let us know at support@code.org.
