physics objects falling through each other?

[evandude]

Hi,

I made a simple test map for playing with physics. It consists of a large concrete block swinging from 2 ropes. the block has a little loop connected to it with a short length of rope, which is initially held on a hook that can be shot to release the block so it will swing. both the block and the loop are func_physbox. pretty simple.

however, if i just do it that way, the block will swing down (stretching the rope a few feet) and back up a few times, and after about the 4th swing the loop will be just magically pulled through the hook.

Also, I finally managed to get it so the ropes don't just pass through things. I stuck a random block in the path of the ropes and they will hang up on it... for a moment. after the block swings a few more feet, the ropes just pass through the block. So I get the appearance of the block colliding with the ropes, but not if the ropes pull too much harder.

these both seem like the same problem. does anyone know what is going on? and if theres anything i can do to fix it? it seems kind of stupid that a physics object would just pass through another object when there was a few hundred pounds of force on it, but not when there is a smaller force (if i reduce the weight of the block, it doesn't pull the loop through)

 

[evandude]

nobody??

 

[Triggerhappy41]

I think there is a flag in rope properties that says "collide with world"
you probably want that.

As for the loop thing, keep in mind that hl2 physics arent perfect. The smaller the object, the more screwed up the physics gets.

Try running the map in HL2 sp (has the best physics) or make the loop assembly bigger.

 

[evandude]

thx for the reply... but I already have the ropes set to collide with world. they are colliding with things like they should, but like the loop, after enough force is applied, they just cut right through things. I imagine you are probably correct in that it is just an issue of scale.

And, I did not think to try it in SP, makes sense that the DM physics wouldn't be as fancy.

 

[Triggerhappy41]

they are better than cs source by a lot, but its very noticable that dm physics arent the best. I made a physbox elevator with cables, and in DM it was all shaky when you stand on it. In SP everything is much smoother.