flash - How do you animate a display object in an arc in AS3? -

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This is a Flash AS3 only for a game in the project.

The player controls a character gun. By clicking on the screen, the gun pressed a missile in an arc.

Is the best way to calculate the coordination of missiles X and Y for each frame?

Ok, an arc is a piece of a circle, the common form for a circle is 

  x = r * cos (a) + cx y = r * sin (a) + cy

ou r circle radius Is the coordinates of the circle with the angle (in radians), and the cx and cy circle of the circle.

So each frame increases the angle ( a ) and recalculate the position with those formulas.

> This trick will determine appropriate radius and center points

EDIT: To get the same speed on different readi

To get the velocity (pixels / sec) from angular velocity (rad / sec) 

  v = Δa * r

So if we select something v , then Δa = v / r where v is somewhat stable and r is the radius of the circle.


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