agent collision doesn't work for diagonals

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What steps will reproduce the problem?
1. Place a flag at a 45 degree angle relative to the spawn point.
2. Train a population of agents to go to the flag.
3. Place a wall between the spawn point and the flag.
4. Rotate the wall to be at 45 degree angle, perpendicular to the path to the 
flag.

What is the expected output? What do you see instead?

The agents should bunch up against the wall and then try to figure out a way to 
go around it.

Instead they bunch up against the invisible axis-aligned bounding box 
surrounding the wall, which makes them learn to go around an axis-aligned 
bounding box instead.

Original issue reported on code.google.com by ikarpov on 11 Nov 2011 at 9:48

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Original comment by ikarpov on 14 Nov 2011 at 8:25

• Added labels: Priority-High
• Removed labels: Priority-Medium

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working on branches/collision

Original comment by ikarpov on 27 Nov 2011 at 9:30

• Changed state: Started

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addressed by merging branches/collision into trunk in r1489

Original comment by ikarpov on 30 Nov 2011 at 12:38

• Changed state: Fixed