   A question about parabolic scattering distribution
  While I was developing the new game,I encountered this problem.As the above FigureThere are some rectangulars in the space randomly.I can jump from a random position and follow a parabola.The initial velocity can be any direction and the speed is in the range[0,Vmax].How can I get the all position on the outline of rectangulars?Please note the parabola can be cutted by the rectangular!I am in mire!Can you give me some light?   
  Can SomeBody Help Me?   