BEPUphysics

Let's say I have a point in world space. This point is roughly 3 units to the left of a box. I want to get this point's "local" point relative to the box. (EG, (3,0,0)) I want to then render something at that local point. That way, if the entity moves or rotates, the point stays at the cor...

Having the same body for both parameters won't work, but you can pass null in for the first parameter for both constraints. When null is passed into a two entity constraint as a connection, the constraint connects to a kinematic 'world' entity. That sets Position.Z = ~20 and Velocity.Z = -110 consi...

I'm trying to lock certain entities into a 2D environment TheClient.PhysicsWorld.Add(Body); popj = new PointOnPlaneJoint(Body, Body, new Vector3(0, 0, 0), new Vector3(0, 0, 1), new Vector3(0, 0, 0)); TheClient.PhysicsWorld.Add(popj); raj = new RevoluteAngularJoint(Body, Body, new Vector3(0, 0, 1)); ...

I'm working on client/server sharing physics, and I want to make it so if the server says an entity is deactivated, then it deactivates on the client as well. There's a variety of reasons for this that aren't incredibly relevant to the discussion. Basically: - The entity must stop moving / calculati...

So I figured out what was actually happening... the clientside representation of the object had a mass of 0, while the serverside had a mass of 100. It was rendering fine, just the entity itself was rotating weirdly. The server sends updates every tick on the position/velocity/angle/angular_velocity...

So, I got cuboids (boxes) rendering /perfectly/ thanks to previous posts. They rotate correctly and all. I'm now trying to handle a complex model generated from a file. The origin of the model is at the model's bottom, and obviously that's not where the center of mass is, so I record the offset gene...

Okay so public OpenTK.Matrix4 GetOrientationMatrix() { Matrix3x3 omat = Body.OrientationMatrix; omat.Transpose(); Matrix mat = Matrix3x3.ToMatrix4X4(omat); return new OpenTK.Matrix4(mat.M11, mat.M12, mat.M13, mat.M14, mat.M21, mat.M22, mat.M23, mat.M24, mat.M31, mat.M32, mat.M33, mat.M34, mat.M41, m...

When I just do mat.transpose();
I get this:


There's no way it's just a transpose. I don't have the slightest clue what's going on or what to do about it.

Neither .transpose() nor .inverted() (OpenTK method) return anything remote useable. Invert puts everything backwards, transpose produces... I'm not sure what, just everything is way off. Switching columns/rows around manually also produces pure nonsense. Matrix4 mat = GetTransformationMatrix() * Ma...

Welp... you're right, that didn't fix it. It just made it less common if anything at all. The box is a box prefab. Gravity is 0,0,-9.8 Trying to replicate on the demos now... Actually, the physics going on in the demo just looks straight... different from what I see in my creation. Am I perhaps rend...

It'd be pretty neat if we could specify a gravity vector on each entity rather than in the Space. A simple way to accomplish this in a non-changing manner would be to use something along the lines of a Nullable<Vector3> -> if it's null, use Space.Gravity, otherwise, use the value input. In theory, t...

ApplyLinearImpulse which does not force activation (but which would require scaling the acceleration by the object's mass) Uhm... it does? I'm used ApplyImpulse for a few things (Rather than ApplyLinearImpulse for my own stupid reasons) and it definitely does not expect scaling by mass. I actually ...

I did actually assume 1 unit = 1 meter. That box is 1x1x1. However, CollisionDetectionSettings.AllowedPenetration = 0.001f; and now I can't replicate it at all :D In addition, my character is no longer inside the floor. I never bothered posting about that as Bullet had me used to it, but it's nice t...

Is there any way to ensure entities will never enter each other, even partially? Generally it's not a problem, but sometimes I get some weird results, EG today a box landed as shown below after a tumbling fall https://i.imgur.com/MkFxneW.png If you can't tell from the image, it's partially inside th...

I performed Space.ConvexCast(...) and have a RayCastResult. How do I get the Entity impacted? The 'HitObject' merely returns a BroadPhaseEntry, which appears to have no Entity property.

EDIT: Oh, and thanks for the quick and helpful answers to my previous questions