   Point in Circle
  I am currently working on enemies radar.I was working on a rectangle enemies radar.Now that im using a rounded enemies radar image,some enemies on radar may get drawed our of the circle of the radar, casue its rounded and not rectangle.How i can know if the point is in the circle ? thanks alot.   
  A simple distance test to see if the distance from the center of the radar to the enemies screen position is greater than the radius of the radar circle.   