These 2 polygons are not colliding, though this method returns true:

            new float[]{
                        100.0f, 750.0f, 
                        200.0f, 750.0f, 
                        100.0f, 150.0f, 
                        200.0f, 150.0f
            new float[]{
                        77.0f, 695.0f, 
                        91.0f, 695.0f, 
                        84.0f, 681.0f

Am I using it correctly?


1 Answer 1


The first polygon is not convex, swapping vertex 3 and 4 solved the problem

  • 1
    \$\begingroup\$ Then please mark you answer as final (the green check icon). \$\endgroup\$ Apr 5, 2014 at 13:55
  • \$\begingroup\$ Is there any documentation that mentions the specific order that you need to define your verticies in? \$\endgroup\$
    – ashes999
    Apr 5, 2014 at 14:42
  • \$\begingroup\$ I need to wait 2 days until I can mark my own answer as the correct one. \$\endgroup\$
    – cahen
    Apr 5, 2014 at 18:56
  • \$\begingroup\$ @ashes999, you need to enter in the same order you would if you were drawing it with a pen, but of course this doesn't guarantee it's convex \$\endgroup\$
    – cahen
    Apr 5, 2014 at 18:58

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