Simple Physics Engine SPE Simplified Chinese

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phyar 2007-11-12 13:40:03 24
It'd be really handy if we could query an object's momentum at a point, like the inverse of RigidBody::AddWorldImpulse.

Something like:
SPEVector RigidBody::GetWorldImpulse(SPEVector &pos), or ::GetTensor(void *pmat).

This could be used for calculating collision damage, or buoyancy forces against a boat, or friction against a ray-cast car wheel. Would this be possible in the next release?
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OK, your suggestion is valuable and I'll add some interfaces related to these use in the next release.
Thanks.

Alex McLeod 2007-11-12 12:47:45 23
It'd be really handy if we could query an object's momentum at a point, like the inverse of RigidBody::AddWorldImpulse.

Something like:
SPEVector RigidBody::GetWorldImpulse(SPEVector &pos), or ::GetTensor(void *pmat).

This could be used for calculating collision damage, or buoyancy forces against a boat, or friction against a ray-cast car wheel. Would this be possible in the next release?

phyar 2007-11-08 13:54:40 22
Does SPEWorld::CastRay test against the whole mesh, or is a convex hull used? Collisions are working perfectly with concave meshes, but I'm getting erratic results from SPEWorld::CastRay with concave parts of the same meshes.
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SPEWorld::CastRay was designed to test against the whole mesh, but I recently found a bug with this function, it has been fixed now but you need to wait for the next release. Thanks.

Alex McLeod 2007-11-08 12:39:17 21
Does SPEWorld::CastRay test against the whole mesh, or is a convex hull used? Collisions are working perfectly with concave meshes, but I'm getting erratic results from SPEWorld::CastRay with concave parts of the same meshes.

phyar 2007-10-10 20:21:28 20
Is OS X or linux support available?
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I plan to provide Linux edition in version 3.5, no near plan for OS X at present. Thanks.

Robin 2007-10-10 18:09:05 19
Is OS X or linux support available?

Pegas 2007-10-09 23:40:27 18
And any tutorial how to make charachter controler for control camera?

Pegas 2007-10-09 21:09:32 17
Hello. I'm sorry for my terrible english. I have a problem with SPE. Can you write sample special for me with my one model in format .x? SPE Failed if i load this model.

pegas@lsiggroup.cz

phyar 2007-10-05 10:48:06 16
Hello. I'm sorry for my terrible english, but what pappers is your engine based on? Or is it fully your invention? I've heard that it uses some kind position-based alghorithms, and Verlet integrator, but I'm not sure. Where could I read about technnical side of your engine?
Thanks.
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In fact, I rarely read some papers although I collected many, what I read a lot is physics books and mathmatics books.
I don't think it's a matter what type of integration you use, I use simple Euler methed to do integration. Tri-mesh preprocess and collision detection is my own invention so you can not find any information in any papers. The solver I used in SPE is more like a constraint method, but I use a different form and I've done a lot modifications. I believe impulse-based, constraint-based or position-based are the same things in mathmatics while solving rigid body dynamics, but I just know a little about position-based method and maybe it is helpful while simulating clothes things.
Thanks.

Suslik[mipt] 2007-10-04 21:24:18 15
Hello. I\'m sorry for my terrible english, but what pappers is your engine based on? Or is it fully your invention? I\'ve heard that it uses some kind position-based alghorithms, and Verlet integrator, but I\'m not sure. Where could I read about technnical side of your engine?
Thanks.


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