Division on Zero

[ShiftZ]

One more... no, not div by zero. Got invalid floating point operation on cpSpaceHash.c: 230 while trying to add a new shape in scene:

static inline int
floor_int(cpFloat f)
{
int i = (int)f;
...

it caused by uninitialized values of shape->bb.
Initialization has been commented for some reason cpShape.c:65
// cpShapeCacheBB(shape);

shape may have huge bb size and filll whole hash space, also may lead to very long loop casescpSpaceHash:245.

[slembcke]

This should be fixed in trunk as of a couple weeks ago. I had intended to move it so that the bounding box wouldn't be calculated until the shape was actually added to the space. (This was causing some other bug) It seems I missed a couple of cases though.

[ShiftZ]

Anyone know how to trap floating point exception on iPhone.
I had no success. All i can do is just check if floating point exception flag is raised, but it's usless without exact raising location.

[ShiftZ]

[ShiftZ]

[slembcke]

Hmm. That's sort of nasty. I'll have to rearrange some of those ops to use the available precision better. It's hitting that surface very nearly parallel to it's surface causing the dot products to be nearly equal even when the line segment size is not particularly small.

[slembcke]

[ShiftZ]

[ShiftZ]

[slembcke]

Yes, those were intended to produce infinity for horizontal or vertical lines.