RayCast Edge Polygons

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Make an edge polygon
2. Trace a ray through it


What is the expected output? What do you see instead?
Test should always pass, but it passes only sometimes.

What version of the product are you using? On what operating system?
rev22, Windows, VC++2008

Please provide any additional information below.
The bug is between the 249 and 252 lines of b2PolygonShape.cpp

        if (upper < lower)
        {
            return;
        }

In case of edged polygon upper is equal to lower excluding floating point 
error. Due to this error the test passes/fails randomly

Possible solution is to use "upper - level < EPSILON" or to process the 
case of 2 vertices (an edge) separately.

Original issue reported on code.google.com by dipya...@gmail.com on 15 Oct 2009 at 9:49

[GoogleCodeExporter]

A little mistake - it should be "upper - level < -EPSILON"

Original comment by dipya...@gmail.com on 15 Oct 2009 at 9:56

[GoogleCodeExporter]

Original comment by erinca...@gmail.com on 20 Nov 2009 at 7:42

• Changed state: Accepted

[GoogleCodeExporter]

Fixed, thanks!

Original comment by erinca...@gmail.com on 20 Nov 2009 at 8:30

• Changed state: Fixed