velocity calculation algorithm

Question

This is probably a very stupid math question, but i can\'t seem to figure it out. What i have is a circle at point A that i can click on and drag the mouse oway from it. When th

Answer 1

Just normalize the vector from the center of the circle to the point and then multiply by the speed you want. In any goodl vector library there is such a function, but just to clarify:

length=square_root((b.x - a.x)^2+(b.y - a.y)^2)
velocityX = (b.x - a.x) / length * speed
velocityY = (b.y - a.y) / length * speed