BEPUphysics

I've been working on my replay code, in which the physics object is set to an older position, and a history of its update information is used as the world steps forward. I'm noticing however that doing an identical world step twice can result in very different results. I know most physics engines ar...

What Is happening is the space has a capsule for each player. The players each send in their commands at a set interval on the client, so player A's input may arrive at 400, and player B's at 450. Because I cannot update each player/capsule indivually (but update the space as a whole), I need to fre...

Hi Norbo, I'm working on a server authoritative shooter where each client has a capsule on the server. The code is done except for 'freezing' each entity except the one that I'm receiving input for (each time a user input comes in, the server is updated to the client's last received time). What is t...

Hi Norbo,
I rewrote my replay code and found out that it was due to using a custom RingBuffer<> class from here.

I changed it to a fixed State[] array and i can no longer reproduce the bug.

Thanks for your help (even though it wasn't a problem directly with bepu, you still were a huge help)!

Is there any asynchronous access going on? Could the space (and thus possibly orientation) update while the orientation is being read? That could produce arbitrary corrupt values, though I would expect to see more varied bad values than just 0,0,0,0. Could there be any interfering process between t...

Hi Norbo, I compiled with CHECKMATH and narrowed my problem down to Entity.Orientation.set When the orientation from my replay buffer is 0,0,0,0 it throws the NaN error immediately after calling Quaternion.Normalize(ref value, out orientation); in EntityBase.cs on line 79. I'm not sure why it would ...

Hi Norbo, I'm working on a replay system using the character controller sample from the latest bepu physics. I'm storing 1000 states (the state structure is posted below). I store 1 position each time I call space.Update() and it works almost perfectly. However, its occasionally throwing the error &...

My levels won't be overly complicated, and the terrain / buildings are all static physics props (same type of levels as TF2 basically) Also, lol at COD 19. You bring up an interesting point with WoW, I suppose as long as the server side checks to make sure the player made a valid move (IE they didn'...

Hi Norbo, It would only be for one player (the local player). Although depending on how I do it, other dynamic shapes may need to be moved during the correction, but these shapes themselves won't be corrected. Basically I'm trying to implement what this paragraph explains: "When the client rece...

Is it possible to rewind the physics system, for one specific entity in particular? I'm attempting to implement Gaffer on Game's series on networked physics , and part of it relies on replaying / rewinding when a prediction error has occurred. If it's not implemented, is there something similar I co...

Ah, that makes perfect sense! I also came up with a solution that is working for my models, and I thought I would post it here in case anyone else ever needs it. I first changed the default margin to 0.02, which is half of the default. Then I looped through the vertices extracted from the TriangleMe...

I'm still having issues after I followed (or attempted to follow) your last post. I modified my World update code to look like this: var rotMatrix = Matrix.CreateFromQuaternion(PhysicsEntity.Orientation); SceneObject.World = Matrix.CreateScale(ModelScale); SceneObject.World *= Matrix.CreateTranslati...

That makes sense, and I believe it should be relatively easy to implement. I tried modifying my DynamicMapObject's update method to look like this: SceneObject.World = Matrix.CreateScale(ModelScale) * Matrix.CreateFromQuaternion(PhysicsEntity.Orientation) * Matrix.CreateTranslation(PhysicsEntity.Pos...

Hi Norbo, sorry for all the questions recently :roll: I'm having a strange bug with dynamic physics entities in my game, their models don't match up with the physics entity. It seems as though they aren't correctly centered, however using this fix viewtopic.php?f=4&t=1494&p=8826 doesn't solv...

I found one problem for my Low FPS: The book objects were stuck in the shelves of my bookcase (which was a static mesh object). Moving them off of the shelf raised my fps to its normal standard. I'm going to optimize as many models as I can by using basic shapes, and for more complex objects I'll us...