So I noticed that my application consistently crashing at Math.Sign() with NaN values passing in it. I tried to fix the bug the whole day without luck -- the bug is very trivial what causing it.
I also override the XNA's Vector2 object with NaN value to a corrected one but the physics movement make it worst.
Tried looking in the net as well but I think nothing really that helps. In the first place I thought my engine now written in C# should be flawless. !@#$ I was very frustrated! Then I decided to continue the other modules and almost got me thinking not to use physics for now.
After few days I realized, Hey! why not brute force assertion on suspected codes and slowly dig more....
Code:
System.Diagnostics.Debug.Assert(!float.IsNaN(value));
Success! At some point on 2 objects colliding, you will get a perfect 2 radius delta length value (ex. 40.0f) subtracted from 2 object position. By computing the minimum translation distance you will need to subtract the delta length to 2 radius added so resulted to 0 and need to divide again to delta length and will result to Not-a-Number value in C#.
Blablablah! it only means at some point I'm dividing a perfect 0 value. Heheh
So far everything is working fine and I'm almost done with the engine writing (maybe for a very simple game).
Now I'm off to test the codes to my Xbox360 and to WindowsPhone7 emulator =)
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