Length of an arc between two angles
Task
Calculate the length of the arc (green) between two angles;
It is important in video game programming
implement a method that takes parameters like:
- xpos of the circle
- ypos of the circle
- radius
- ang1
- ang2
return green arc_lenght
example method:
arc_lenght (xpos, ypos, radius, ang1, ang2) { return arc_lenght; }
Julia
I am unsure of the precise meaning of some of the task text, but using the linked Imgur graphic as a guide, we can find the distance along the circumference of the circle which is NOT swept out between the two angles. <lang julia>
arclength(r, angle1, angle2) = (360 - angle2 + angle1) * π/180 * r
@show arclength(10, 10, 120) # --> arclength(10, 10, 120) = 43.63323129985823 </lang>