I have here a sphere that seems to gain an awful lot of velocity when hitting a convex portion of a map entity -- if I roll it off of a ledge, it just pops off into space.

I've checked out the "Events and Physics" section of the manual; tried using various masses (larger spheres seem to be affected more than smaller ones); played with ph_iterations (0 seems to cause the most problems, but that may be my imagination); mucked with ph_setcorrections (small values mitigate this, but that causes other problems); and so forth, but to no avail. Is there a solution to this?

Thanks.

In fact, here's a quick video (WMV, 1MB) of the thing in action. The sphere moves towards the block slowly, but when it comes into contact with the edge, it flies off.

The same thing will happen if the sphere starts on top of the block and rolls off of it.

Mmmm, strange. Could you post or pm some of your physics settings, I could try to reproduce it. I'm not having such behaviour, so ...

Not sure if you are already using it, I think so, but how about adding this line :

Code:

---

 phent_setmaxspeed( my, 100, 100);

---

Cheers

Thanks. Having played around a little more, I think the effect is most prominent when I change the object's scale_x/y/z (although I'm doing this before I turn physics on for that object). It seems like that could make a difference, but I haven't seen any documentation to that effect(?)

Just trying to equate it to a behaviour I've observed before in my physics work: Is the block a real level block or a model ?

The fact is, some intern built a model here with several inverted faces (their normals facing the wrong way) and when a physics entity hit it it was accelerated instead of bouncing off of it. The intern had the nerve of suggesting we use it as a "nitro" feature in a racing game... I almost beheaded him... But I digress.

That's pretty funny. :)

Naw; the blocks are genuine WMBs. The effect is really noticeable when (for example) I have a ball rolling across two tables placed side-by-side. It really gets angry when it hits the interface between the tables.

Damn. I'll try to reproduce the effect here (though we have very little, if any, level blocks in our map) and get back to you on that.

I haven't succeeded in reproducing this effect either. I haven't added a scale instruction yet, so this will be the next thing to do. I'm planning to use physics in my game, so I need to know if it's 'save' to use blocks too, and if it's not, then I want to find out how to reduce this weird effect to zero,

Cheers