BulletSim - Revision history

Acryline: /* Adjusting Avatar Height */

2024-11-02T12:05:36Z

‎Adjusting Avatar Height

2024-11-02T11:12:55Z

‎Avatar Walking Up Stairs

2022-01-12T21:08:01Z

2022-01-12T21:05:03Z

2020-09-15T14:45:42Z

‎Vehicles: added link to older, orphaned vehicles page

2015-03-01T01:29:15Z

‎Adjusting Avatar Height: Changing default values to zero to reflect OpenSimDefaults.ini settings

2015-01-07T14:37:09Z

Added AvatarStepAngle to walking up steps description

2015-01-07T04:38:58Z

fix table formatting error (hate markdown)

2015-01-07T03:46:25Z

Add description of AvatarStepGroundFudge. Correct default values to match code.

2013-10-20T15:43:54Z

‎Adjusting Avatar Height: minor typos corrected

@@ Line 121: / Line 121: @@
 {| class="wikitable" |
 |-
-! INI varaible
+! INI variable
 ! Default
 ! Description

@@ Line 76: / Line 76: @@
 The avatar movement actor include special checks to allow avatars to move up stepped objects (think stairs). The code works by checking for collisions close to the avatar's feet and, if trying to walk forward and not flying, pushing the avatar up to get over the object. This is a different algorithm than ODE which relies on the curvature of the avatar's capsule to move up and over low obstacles.
-There are five INI parameters that control stairs:
+There are seven INI parameters that control stairs:
 {| class="wikitable" |
 |AvatarStepHeight

@@ Line 1: / Line 1: @@
 {{Quicklinks|BulletSim}}{{BulletSim}}
-'''BulletSim'''
+= BulletSim =
 BulletSim is the module for OpenSimulator that creates virtual world physics using the [http://bulletphysics.org Bullet Physics Engine]. This module provides high performance physics as well as physical vehicle performance compatible with [http://secondlife.com Second Life].

← Older revision		Revision as of 21:05, 12 January 2022
Line 1:		Line 1:
		+	{{Quicklinks\|BulletSim}}{{BulletSim}}
	'''BulletSim'''		'''BulletSim'''

← Older revision		Revision as of 14:45, 15 September 2020
Line 64:		Line 64:

	[[BulletSim/VehicleTuning]]		[[BulletSim/VehicleTuning]]
		+
		+	See also the archived page: [[Vehicles]]

	== BulletSim Script Extension Functions ==		== BulletSim Script Extension Functions ==

@@ Line 124: / Line 124: @@
 |-
 | AvatarHeightMidFudge
-| 0.1
+| 0.0
 | This is a fudge factor added to the 50% avatar height (about 1.87 meters). This number is added to the total height so adjusting this number moves the whole capsule up and down by roughly this distance.
 |-
 | AvatarHeightLowFudge
-| -0.2
+| 0.0
 | This factor is added to the height at the low end of the height scale ("0%" height which is about 1.62 meters). This number is scaled proportionally from the mid height to the low height. Adjusting this number adjusts the height of the capsule for small shapes.
 |-
 | AvatarHeightHighFudge
-| 0.1
+| 0.0
 | This is similar to AvatarHeightLowFudge but it is applied to the high end of height ("100%" height which is about 2.12 meters). It is also added proportionally from the mid height to the large height.
 |}

@@ Line 78: / Line 78: @@
 |AvatarStepHeight
 |The maximum height of a step. If the avatar collides with something of less than this height, it will be considered a step and the avatar will consider moving up to get over it;
 |-
 |AvatarStepGroundFudge

@@ Line 81: / Line 81: @@
 |AvatarStepGroundFudge
 |A small fudge factor subtracted from the computed base of the avatar when checking if the collision is close to the avatar's feet. The base of the avatar computation can be a little high (above the ground) so this factor allows comparing lower for the step. This can prevent small bumps on the ground being too small to be considered a step (which causes the bump to act like a wall);
-|-|AvatarApproachFactor
+|-
 |The angle the step must be approached. This is the radians of the angle between the avatar and the colliding step surface. This prevents walking up things when approached from a wide angle. The default of 0.6 is about a 45 degree approach angle. Setting this down to 0.3, for instance, requires the avatar to be walking nearly directly into the step to get the up actions.
 |-

@@ Line 79: / Line 79: @@
 |The maximum height of a step. If the avatar collides with something of less than this height, it will be considered a step and the avatar will consider moving up to get over it;
 |-
-|AvatarApproachFactor
+|AvatarStepGroundFudge
 |The angle the step must be approached. This is the radians of the angle between the avatar and the colliding step surface. This prevents walking up things when approached from a wide angle. The default of 0.6 is about a 45 degree approach angle. Setting this down to 0.3, for instance, requires the avatar to be walking nearly directly into the step to get the up actions.
 |-
@@ Line 96: / Line 98: @@
 <code><pre>
 [BulletSim]
-     AvatarStepHeight = 0.5
+     AvatarStepHeight = 0.6
      AvatarStepApproachFactor = 0.6
      AvatarStepUpCorrectionFactor = 1.0
-     AvatarStepForceFactor = 1.0
+     AvatarStepForceFactor = 2.0
-     AvatarStepSmoothingSteps = 2
+     AvatarStepSmoothingSteps = 1
 </pre></code>

@@ Line 107: / Line 107: @@
 === Adjusting Avatar Height ===
-As of May 13, 2013, BulletSim uses the Bullet capsule shape to approximate a standing avatar. One oddity of the capsule is its height which doesn't scale nicely in the way OpenSimulator would like. To fix this, several adjustment parameters are available to correct the avatar capsule height so that avatar properly appear to be standing on the ground rather than floating over or sunk into the ground.
+As of May 13, 2013, BulletSim uses the Bullet capsule shape to approximate a standing avatar. One oddity of the capsule is its height which doesn't scale nicely in the way OpenSimulator would like. To fix this, several adjustment parameters are available to correct the avatar capsule height so that an avatar properly appears to be standing on the ground rather than floating over or sunk into the ground.
 These parameters are: