Moving platforms?

[3DModelerMan]

If I have a metaTriangleSelector and a platform that moves up and down, will the collision update?

[Ion Dune]

Wouldn't it be really easy to just make a quick sample and find out yourself? You're relying on someone else to know this off the top of their head, which may or may not be the case, and if its not the only way to figure it out would be to read the source or make a simple test case, the latter being the quickest and the easiest.

[Mel]

The answer is yes. I've already done that, but you have an important side efect. The moving platform will colide to your objects as far as it ONLY will COLIDE with the objects. which means that, if, perhaps, an object fall over the platform, it will sustain the object indeed, but it WON'T move it along. It is complex to explain, but simply, it won't move objects along the platforms, It won't push your object, if it touches it, and keeps moving, it won't do anything else, but calculate a collision.

[3DModelerMan]

I had that problem once with a 2D game. I had to put a 1 pixel edge on either side of the platform.

[christianclavet]

Humm...

I was thinking of updating the collision sphere with the scene at each frame... (updating the collision triangle with the scene THEN update the collsion per frame) I don't think this will work from what I read there.

The only thing i'm thinking right now is to parent the object with a "trigger zone" to the platform, so that the object will move in relation with it. If the object get out of the trigger zone, it would be necessary to unparent it.

The trigger zone would be a simple bounding box defining the area of the platform. Check if the object is in that area, if yes, check if it's parented, then parent it to the platform if necessary. If the object is NOT in the area, check if it's parented, then unparent to the platform as necessary.

Will have to try that idea when I have the time.

If some of you have tried a method would be nice the easiest one...

[3DModelerMan]

But what about how the parenting would affect your jump? That would have to be taken into consideration to. You could unparent when you were jumping I guess.