Author Topic: Newton physics in Q2! (Read 6582 times)

[BTF]Jehar · « **on:** March 11, 2009, 10:17:27 PM »

I shit you not. Paril, as part of his CleanQuake2 code project, is toying with implementing full rigid-body physics into quake 2 as a server-side mod! Don't believe me? Check out the demo!

Demo:
http://jehar.tastyspleen.net/Quake/omgnewton.dm2

Test Model (unzip into baseq2/models):
http://jehar.tastyspleen.net/Quake/skin.zip

Map:
http://jehar.tastyspleen.net/Quake/killingbox.bsp

He'll be plugging away at this, and will be tackling ropes and ragdolls next!

console · « **Reply #1 on:** March 11, 2009, 10:48:51 PM »

Nice

Jay Dolan · « **Reply #2 on:** March 12, 2009, 09:49:02 AM »

Is there a project page or additional forum post for this somewhere?

Buzzard · « **Reply #3 on:** March 12, 2009, 09:57:43 AM »

i just played it with him and i got to say its amazing!

peewee_RotA · « **Reply #4 on:** March 12, 2009, 10:15:16 AM »

That's awesome! I know that ya3dag did it too. But still very cool!

[BTF]Defiant! · « **Reply #5 on:** March 12, 2009, 09:54:55 PM »

Impressive!

[BTF]Sigma · « **Reply #6 on:** March 12, 2009, 10:14:28 PM »

Fap Fap!!

Jay Dolan · « **Reply #7 on:** March 13, 2009, 10:18:53 AM »

So I finally checked this out last night. There's a _lot_ of work left to do before this is particularly useful, but I hope he keeps at it.

Whirlingdervish · « **Reply #8 on:** March 13, 2009, 10:22:49 AM »

looks like a promising project tho. would be nice to be able to whip shit at people and hurt them ala crysis.

I can imagine takin people out with a thrown headjib and all sorts of interesting uses for it if it can be applied to the other in-game items/models.

knocking the healthpaks by ssg off of their spawn point as a wounded player jumps to them from lift on dm1 would be completely hilarious.

[BTF]ZeTHeR · « **Reply #9 on:** March 13, 2009, 12:43:54 PM »

petty cool man, pretty cool.

Paril · « **Reply #10 on:** March 13, 2009, 02:17:11 PM »

Quote from: Jay Dolan on March 13, 2009, 10:18:53 AM

So I finally checked this out last night. There's a _lot_ of work left to do before this is particularly useful, but I hope he keeps at it.

Thanks, I guess.

There's a few problems with the angles, I have a feeling Newton doesn't like the fact that Quake2 uses euler angles, because no matter how I cut it it seems to rotate weirdly in certain conditions. I'm probably not setting something correctly, but I'm not sure yet.

I'm trying to get PAL compiling so I can implement Bullet to replace Newton, because PAL provides a better interface for this sort of engine than Newton does off the bat. Besides being able to spawn boxes that can stack if placed correctly, it has no use right now. I was able to create a hanging object, but multiple hanging objects with pivot points (ie, ropes) didn't work correctly, most likely because of the cone limits not being set correctly, or a bad pivot point.

I wrote a quick ragdoll code, which sort of works, the positioning needs to be tweaked a little (I wrote the offset matrix and swapped x and z by accident), but it functions to a basic extent.

Once I have working PAL libraries I can start on working with different shapes and release a tech demo.

I also have been working on a method to convert .map files into vertices for passing to a collision mesh.. this method was apparently not the best. q2dm1.map converted to plain float vertices is around 3 GB, so I'm going to stick to a converter to strip the .map file of all unneeded info and save the values in binary, and have the DLL interpret the info into vertices.

-Paril

Jay Dolan · « **Reply #11 on:** March 13, 2009, 09:37:11 PM »

Quote from: Paril on March 13, 2009, 02:17:11 PM

I also have been working on a method to convert .map files into vertices for passing to a collision mesh.. this method was apparently not the best. q2dm1.map converted to plain float vertices is around 3 GB, so I'm going to stick to a converter to strip the .map file of all unneeded info and save the values in binary, and have the DLL interpret the info into vertices.

You did something wrong, then. There's no way it should consume that much space. Also, there's no reason to require the .map. You can get the information you need from the .bsp; in fact it's actually easier if you do. There is code in the Quake2World engine that converts the entire .bsp (including submodels) into static vertex arrays and vertex buffer objects. I would have to imagine this is basically what you're looking for.

http://jdolan.dyndns.org/trac/browser/quake2world/trunk/src/r_model_bsp.c#L619

This populates r_worldmodel->verts, r_worldmodel->normals, etc.. with arrays of GLfloat. Each msurface_t knows its index into these arrays. You can basically think of each msurface_t as a GL_POLYGON. This is the case for stock Quake2, as well. This should be all you need to convert it to any other polygon-based mesh format. If you need triangles instead of polygons, I have a simple triangulation function here:

http://jdolan.dyndns.org/trac/browser/quake2world/trunk/src/r_model_mesh.c#L579

It just walks around the polygon from vertex 0, subdividing it into tris.

[BTF] Reflex · « **Reply #12 on:** March 14, 2009, 06:41:06 PM »

Quote from: Whirlingdervish(Q2C) on March 13, 2009, 10:22:49 AM

knocking the healthpaks by ssg off of their spawn point as a wounded player jumps to them from lift on dm1 would be completely hilarious.

I like moving items out of sight with the Volator in Whale

peewee_RotA · « **Reply #13 on:** March 14, 2009, 08:09:10 PM »

Quote from: [BTF] Reflex on March 14, 2009, 06:41:06 PM

Quote from: Whirlingdervish(Q2C) on March 13, 2009, 10:22:49 AM
knocking the healthpaks by ssg off of their spawn point as a wounded player jumps to them from lift on dm1 would be completely hilarious.

I like moving items out of sight with the Volator in Whale

Doesn't the air fist in ChaosDM do this as well?

[BTF] Reflex · « **Reply #14 on:** March 17, 2009, 04:52:24 AM »

that the one that shoots 'bubbles' ? sounds familiar

Author Topic: Newton physics in Q2! (Read 6582 times)

El Box de Shoutamente