PhysicsEngines - Revision history

Ubit: /* Physics Testing Videos */

2017-11-18T09:34:36Z

‎Physics Testing Videos

Misterblue: Added note that BulletSim is now the default physics engine

2014-06-08T17:57:09Z

Added note that BulletSim is now the default physics engine

Justincc: /* Introduction */

2013-11-19T20:54:36Z

‎Introduction

Justincc: /* ODE Plugin */

2013-11-19T20:47:05Z

‎ODE Plugin

Justincc: /* Introduction */

2013-11-19T20:45:41Z

‎Introduction

Justincc: Put up page warning

2013-11-19T20:45:25Z

Put up page warning

MakoBot: Robot: Replacing 'OpenSim' to 'OpenSimulator', which is the precise name

2012-03-04T06:54:00Z

Robot: Replacing 'OpenSim' to 'OpenSimulator', which is the precise name

MakoBot: Robot: Cosmetic changes

2012-03-04T03:54:50Z

Robot: Cosmetic changes

Show changes

Justincc: /* ODE Plugin */

2011-12-01T18:50:37Z

‎ODE Plugin

Justincc at 18:50, 1 December 2011

2011-12-01T18:50:10Z

@@ Line 146: / Line 146: @@
 * Crash on BulletX. You will find the next message in console sometimes: ''Overflow in AABB, object removed from simulation If you can reproduce this, please email bugs@continuousphysics.com Please include above information, your Platform, version of OS. Thanks.''
 * <del>Rotation doesn't seem to work</del><br />
 [[Category:Development]]

@@ Line 1: / Line 1: @@
 {{Quicklinks}}
 == Introduction ==
-'''Note: Much of this page was written in November 2009.  The OpenDynamicsEngine OpenSimulator plugin is not currently under any significant active development as the [[BulletSim]] physics plugin will likely become the default in the next release of OpenSimulator.  However, as of OpenSimulator 0.7.6, BulletSim is still considered experimental.''' -- [[User:Justincc|Justincc]] 20:45, 19 November 2013 (UTC)
+'''Note: Much of this page was written in November 2009.  The OpenDynamicsEngine OpenSimulator plugin is not currently under any significant active development as the [[BulletSim]] physics plugin will likely become the default in the next release of OpenSimulator.  However, as of OpenSimulator 0.7.6, [[BulletSim]] is still considered experimental.''' -- [[User:Justincc|Justincc]] 20:45, 19 November 2013 (UTC)
 The physics engines currently available for use in OpenSimulator are "basicphysics", "POS" and "OpenDynamicsEngine". As of OpenSimulator 0.6.9, the plugin "OpenDynamicsEngine" is the default and can be seen in the <tt>OpenSim.ini</tt> file.

@@ Line 1: / Line 1: @@
 {{Quicklinks}}
 == Introduction ==
-'''Note: Much of this page was written in November 2009.  The OpenDynamicsEngine OpenSimulator plugin is not currently under any significant active development as the BulletSim physics plugin will likely become the default in the next release of OpenSimulator.  However, as of OpenSimulator 0.7.6, BulletSim is still considered experimental.''' -- [[User:Justincc|Justincc]] 20:45, 19 November 2013 (UTC)
+'''Note: Much of this page was written in November 2009.  The OpenDynamicsEngine OpenSimulator plugin is not currently under any significant active development as the [[BulletSim]] physics plugin will likely become the default in the next release of OpenSimulator.  However, as of OpenSimulator 0.7.6, BulletSim is still considered experimental.''' -- [[User:Justincc|Justincc]] 20:45, 19 November 2013 (UTC)
 The physics engines currently available for use in OpenSimulator are "basicphysics", "POS" and "OpenDynamicsEngine". As of OpenSimulator 0.6.9, the plugin "OpenDynamicsEngine" is the default and can be seen in the <tt>OpenSim.ini</tt> file.

@@ Line 21: / Line 21: @@
 === To-do list (next changes) ===
-* Tune all collisions
+* This plugin is not currently under active development.  However, patches which implement extra functionality without any danger of regressions are still welcome.
-* DONE: Introduce Prim Shape Type to have more than the box shape using the Meshmerizer tri-mesh generator
-* Fix bugs
-* Physical(active) Linksets
-* Vehicles (almost done, waiting on implementation of LSL functions)
 === Known bugs ===
-* Linkset + Physical/Active are not working: ''Making a linkset physical, leaves the geometries of it's child prim where they are.. even if the root prim moves.'' Probably fixed by now.
+* Vehicle support is incomplete.
-* Certain distributions of Debian utilize 100% of the CPU while running the ODEPlugin.
-* ODE Asserts
 === Recent changes ===
 === Compiling from source ===

@@ Line 1: / Line 1: @@
 {{Quicklinks}}
 == Introduction ==
-'''Note: Much of this page was written in November 2009.  The OpenDynamicsEngine OpenSimulator plugin is not currently under any significant active development as the BulletSim physics plugin will likely become the default in the next release of OpenSimulator.  However, as of OpenSimulator 0.7.6, BulletSim is still considered experimental.'''
+'''Note: Much of this page was written in November 2009.  The OpenDynamicsEngine OpenSimulator plugin is not currently under any significant active development as the BulletSim physics plugin will likely become the default in the next release of OpenSimulator.  However, as of OpenSimulator 0.7.6, BulletSim is still considered experimental.''' -- [[User:Justincc|Justincc]] 20:45, 19 November 2013 (UTC)
 The physics engines currently available for use in OpenSimulator are "basicphysics", "POS" and "OpenDynamicsEngine". As of OpenSimulator 0.6.9, the plugin "OpenDynamicsEngine" is the default and can be seen in the <tt>OpenSim.ini</tt> file.

@@ Line 1: / Line 1: @@
 {{Quicklinks}}
 == Introduction ==
-The physics engines currently available for use in OpenSim are "basicphysics", "POS" and "OpenDynamicsEngine". As of OpenSim 0.6.9, the plugin "OpenDynamicsEngine" is the default and can be seen in the <tt>OpenSim.ini</tt> file.
+The physics engines currently available for use in OpenSimulator are "basicphysics", "POS" and "OpenDynamicsEngine". As of OpenSimulator 0.6.9, the plugin "OpenDynamicsEngine" is the default and can be seen in the <tt>OpenSim.ini</tt> file.
 ODE has received the bulk of testing. As of 2010 it supports collisions with all prims (cubes, spheres, cylinders etc) with any combination of distortions including hollow, taper, twist, path cut etc. In combination with Meshmerizer it also supports correctly colliding with sculpted prims.
@@ Line 38: / Line 38: @@
 === Compiling from source ===
-OpenSim currently bundles r1755 of ODE (a revision post 0.11.1). The code is in the [[Opensim-libs git repository]], in the trunk/unmanaged/OpenDynamicsEngine-r1755/ directory. This directory has a few patches applied to ODE specifically for OpenSim ("git log" to see information about these). It also has instructions on how to build the code and install for OpenSimulator.
+OpenSimulator currently bundles r1755 of ODE (a revision post 0.11.1). The code is in the [[Opensim-libs git repository]], in the trunk/unmanaged/OpenDynamicsEngine-r1755/ directory. This directory has a few patches applied to ODE specifically for OpenSimulator ("git log" to see information about these). It also has instructions on how to build the code and install for OpenSimulator.
 ==== Old compile instructions ====
@@ Line 73: / Line 73: @@
 Try to play a bit with the avatar-settings in OpenSim.ini, if the avatar has it's feet stick in the terrain or if the basic-position is crouching.
-These settings seem to work on Linux64: (Note that these are old settings and may not work with the latest OpenSim versions)
+These settings seem to work on Linux64: (Note that these are old settings and may not work with the latest OpenSimulator versions)
   av_capsule_radius = 0.68
   av_capsule_standup_tensor_linux = 1900000
@@ Line 106: / Line 106: @@
 changes to take effect.
-Then you can follow the Linux instructions to build the library. When it has built, copy the <tt>ode/src/.libs/libode.dylib</tt> file to the OpenSim <tt>bin</tt> directory.
+Then you can follow the Linux instructions to build the library. When it has built, copy the <tt>ode/src/.libs/libode.dylib</tt> file to the OpenSimulator <tt>bin</tt> directory.
 ===== Windows =====
@@ Line 136: / Line 136: @@
 As of 2007 Bullet supported box-shaped prims and appears stable; there had been little testing, and it is known to have issues with friction (you skate around on non-level surfaces)
-BulletX Plugin in OpenSim runs the modified version of BulletX. The original version of BulletX runs under and has code-dependencies with MS.XNA. The orginal BulletX can be found at [http://www.codeplex.com/xnadevru XNADev.ru]. The modified version removes all code dependencies with MS.XNA. On the other hand, it needs another library to work. This library is based on Mono.Xna and it's called MonoCompactMaths. The modified BulletX and the MonoXnaCompactMaths can be found on the svn of OpenSim. Because its code independency of MS.XNA, the modified BulletX should can be run under either MS.Net or Mono and, therefore, either Windows or Linux (obviously you can combine Windows + Mono)
+BulletX Plugin in OpenSimulator runs the modified version of BulletX. The original version of BulletX runs under and has code-dependencies with MS.XNA. The orginal BulletX can be found at [http://www.codeplex.com/xnadevru XNADev.ru]. The modified version removes all code dependencies with MS.XNA. On the other hand, it needs another library to work. This library is based on Mono.Xna and it's called MonoCompactMaths. The modified BulletX and the MonoXnaCompactMaths can be found on the svn of OpenSimulator. Because its code independency of MS.XNA, the modified BulletX should can be run under either MS.Net or Mono and, therefore, either Windows or Linux (obviously you can combine Windows + Mono)
 Currently, BulletX Plugin suports collisions Av2Av, Av2Prim and Prim2Prim. Prims and avies movement supported. By the way, collisions needs tunning. The currently collision's behavoir are:

@@ Line 6: / Line 6: @@
 == ODE Plugin ==
-'''In Linux you must run the included shell script, <tt>opensim-ode.sh</tt> or type <tt>ulimit -s 262144</tt> before running mono OpenSim.exe if you plan on having a large number of physics objects (each avatar is a physics object, as well as those which have the physics flag set on the simulator).  The ulimit -s 262144 in Linux protects you against stack collisions and corrupted memory when there are a large amount of physical objects roaming around.'''
+'''In Linux you should consider using included shell script, <tt>opensim-ode.sh</tt> or type <tt>ulimit -s 262144</tt> before running mono OpenSim.exe if you plan on having a large number of physics objects (each avatar is a physics object, as well as those which have the physics flag set on the simulator).  The ulimit -s 262144 in Linux protects you against stack collisions and corrupted memory when there are a large amount of physical objects roaming around.'''
 Currently, the ODE Plugin suports collisions Av2Av, Av2Prim and Prim2Prim. Avies and (active)physical prim movement supported.

@@ Line 1: / Line 1: @@
 {{Quicklinks}}
-==Introduction==
+== Introduction ==
 The physics engines currently available for use in OpenSim are "basicphysics", "POS" and "OpenDynamicsEngine". As of OpenSim 0.6.9, the plugin "OpenDynamicsEngine" is the default and can be seen in the <tt>OpenSim.ini</tt> file.
 '''In Linux you must run the included shell script, <tt>opensim-ode.sh</tt> or type <tt>ulimit -s 262144</tt> before running mono OpenSim.exe if you plan on having a large number of physics objects (each avatar is a physics object, as well as those which have the physics flag set on the simulator).  The ulimit -s 262144 in Linux protects you against stack collisions and corrupted memory when there are a large amount of physical objects roaming around.'''
-ODE has received the bulk of testing. As of 2010 it supports collisions with all prims (cubes, spheres, cylinders etc) with any combination of distortions including hollow, taper, twist, path cut etc. In combination with Meshmerizer it also supports correctly colliding with sculpted prims. As of 2007 Bullet supported box-shaped prims and appears stable; there had been little testing, and it is known to have issues with friction (you skate around on non-level surfaces).
+Currently, the ODE Plugin suports collisions Av2Av, Av2Prim and Prim2Prim. Avies and (active)physical prim movement supported.
-==Compiling ODE from source==
+=== Compiling from source ===
 OpenSim currently bundles r1755 of ODE (a revision post 0.11.1).  The code is in the [[Opensim-libs git repository]], in the trunk/unmanaged/OpenDynamicsEngine-r1755/ directory.  This directory has a few patches applied to ODE specifically for OpenSim ("git log" to see information about these).  It also has instructions on how to build the code and install for OpenSimulator.
-===Old compile instructions===
+====Old compile instructions====
 (Kept for now for comparison and historical purposes).
-====Linux====
+=====Linux=====
 Ensure that the file ../ou/bootstrap is executable and then bootstrap the build process as follows:
@@ Line 49: / Line 78: @@
   av_density = 90
-====Mac OS X====
+=====Mac OS X=====
 You can use essentially the same build process on OS X as on Linux,
@@ Line 79: / Line 108: @@
 Then you can follow the Linux instructions to build the library.  When it has built, copy the <tt>ode/src/.libs/libode.dylib</tt> file to the OpenSim <tt>bin</tt> directory.
-====Windows====
+=====Windows=====
 The standard distribution has a build directory, in which you will find subdirs for several Microsoft compilers.
@@ Line 89: / Line 118: @@
 Under Configuration Properties/Linker/System.   Change Stack Reserve Size to 262144000.   Click the OK button then compile as usual.
-== ODE Plugin in OpenSim ==
+== POS Plugin ==
-Currently, the ODE Plugin suports collisions Av2Av, Av2Prim and Prim2Prim. Avies and (active)physical prim movement supported.
-−
-The currently collision behavior is:
-* For avies, a capsule of .2m of radius and a length based on the avatar height and 80Kg of mass
-* For prims, like a Box or Sphere with a mass of a Box of = 0.5Kg/l = 0.5Kg/dm3 = 500Kg/m3.
-−
-* Prim are separated into ~30m space islands with their own bounding box to speed 'near' calculation.
-−
-* friction is reduced on avatar to object/ground collisions when the avatar is moving
-−
-=== To-do list (next changes) ===
-* Tune all collisions
-* DONE: Introduce Prim Shape Type to have more than the box shape using the Meshmerizer tri-mesh generator
-* Fix bugs
-* Physical(active) Linksets
-* Vehicles (almost done, waiting on implementation of LSL functions)
-−
-==== Known bugs ====
-* Linkset + Physical/Active are not working: ''Making a linkset physical, leaves the geometries of it's child prim where they are..  even if the root prim moves.'' Probably fixed by now.
-* Certain distributions of Debian utilize 100% of the CPU while running the ODEPlugin.
-* ODE Asserts
-−
-==== Recent changes ====
-* Implemented Grab and Throw
-* Implemented llApplyImpulse in the global frame
-* Replaced the 'Avatar Wobble' with an 'Angular Motor' to keep the avatar capsule from toppling.  Results in less bouncing and improved stability.
-* Linksets are now collidable as long as they are not set Physical(active)
-−
-== POS Plugin in OpenSim ==
 POS is Physics Of Simplicity.  It is BasicPhysics with collisions.
@@ Line 126: / Line 126: @@
 * TODO
-==== Known bugs ====
+=== Known bugs ===
 * TODO
@@ Line 134: / Line 134: @@
 === BulletX Plugin in OpenSim: Modified BulletX ===
 BulletX Plugin in OpenSim runs the modified version of BulletX. The original version of BulletX runs under and has code-dependencies with MS.XNA. The orginal BulletX can be found at [http://www.codeplex.com/xnadevru XNADev.ru]. The modified version removes all code dependencies with MS.XNA. On the other hand, it needs another library to work. This library is based on Mono.Xna and it's called MonoCompactMaths. The modified BulletX and the MonoXnaCompactMaths can be found on the svn of OpenSim. Because its code independency of MS.XNA, the modified BulletX should can be run under either MS.Net or Mono and, therefore, either Windows or Linux (obviously you can combine Windows + Mono)