[SOLVED]FLT_MAX? isn't there something like F32_MAX

[Anthony]

Usually I see a lot (+-)vector3df( 99999.9f, 99999.9f 99999.9f ) as initializer.

1.So now I am wondering if you crack up the float by game units to get a better precision won't this give unexpected behaviour?

2.also due to consistency I would have expected something as

Code: Select all

#define F32_MAX 3.402823466e+38F

wich will give something as (+-)vector3df( F32_MAX, F32_MAX, F32_MAX )

3.or did I miss something?

[Anthony]

really, nobody knows if this can unexpected behaviour? Well it's used all of the time so I need to 'trust' it but I am just wondering.

[Radikalizm]

First of all, where did you see such initializers?

Second, I can't make that much of your first post, so I don't really understand what you're asking here ^^

[bitplane]

Unless grep fails me CTerrainSceneNode is the only place that uses a magic number instead of FLT_MAX. I guess either nobody has spotted this, or FLT_MAX will break things due to the lack of precision or overflows up there.

I suggest opening a bug on the tracker so this complaint gets investigated at some point in the future, rather than being buried here on the forums.

[Anthony]

indeed I saw it at CTerrainSceneNode and assumed it was all over the source. In this class the boundingbox is initialized with it.

Did not have any problems found so I can't complain. Can think of scenerios where it could get buggy so I will post it at the tracker since you, bitplane, don't trust it for the full 100% either.

it's used all of the time

well propably always the same piece of code when looking at other parts