BulletSim: more tweeks to AliciaRaven's flying mods. Added parameters

AvatarFlyingGroundMargin and AvatarFlyingGroundUpForce set to 5.0 and
2.0 respectively which seems to give about the same action as in SL.
Also moved force addition to before the velocity to force computation
so the upward velocity is properly applied to the avatar mass.

1 files changed, 12 insertions, 11 deletions

diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSActorAvatarMove.cs b/OpenSim/Region/Physics/BulletSPlugin/BSActorAvatarMove.cs
index 557c4e2..42381ef 100755
--- a/OpenSim/Region/Physics/BulletSPlugin/BSActorAvatarMove.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSActorAvatarMove.cs
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright (c) Contributors, http://opensimulator.org/
  * See CONTRIBUTORS.TXT for a full list of copyright holders.
  *
@@ -227,7 +227,6 @@ public class BSActorAvatarMove : BSActor
                 stepVelocity.Z = m_controllingPrim.RawVelocity.Z;
             }
 
-
             // Colliding and not flying with an upward force. The avatar must be trying to jump.
             if (!m_controllingPrim.Flying && m_controllingPrim.IsColliding && stepVelocity.Z > 0)
             {
@@ -259,23 +258,25 @@ public class BSActorAvatarMove : BSActor
                 // DetailLog("{0},BSCharacter.MoveMotor,taint,overrideStepZWithWorldZ,stepVel={1}", LocalID, stepVelocity);
             }
 
-            // 'stepVelocity' is now the speed we'd like the avatar to move in. Turn that into an instantanous force.
-            OMV.Vector3 moveForce = (stepVelocity - m_controllingPrim.RawVelocity) * m_controllingPrim.Mass;
-
-            // Add special movement force to allow avatars to walk up stepped surfaces.
-            moveForce += WalkUpStairs();
-
-            //Alicia: Maintain minimum height when flying
+            //Alicia: Maintain minimum height when flying.
+            // SL has a flying effect that keeps the avatar flying above the ground by some margin
             if (m_controllingPrim.Flying)
             {
-                float hover_height = m_physicsScene.TerrainManager.GetTerrainHeightAtXYZ(m_controllingPrim.RawPosition) + 8f;
+                float hover_height = m_physicsScene.TerrainManager.GetTerrainHeightAtXYZ(m_controllingPrim.RawPosition)
+                                                        + BSParam.AvatarFlyingGroundMargin;
 
                 if( m_controllingPrim.Position.Z < hover_height)
                 {
-                    moveForce.Z = moveForce.Z + 50f;
+                    stepVelocity.Z += BSParam.AvatarFlyingGroundUpForce;
                 }
             }
 
+            // 'stepVelocity' is now the speed we'd like the avatar to move in. Turn that into an instantanous force.
+            OMV.Vector3 moveForce = (stepVelocity - m_controllingPrim.RawVelocity) * m_controllingPrim.Mass;
+
+            // Add special movement force to allow avatars to walk up stepped surfaces.
+            moveForce += WalkUpStairs();
+
             m_physicsScene.DetailLog("{0},BSCharacter.MoveMotor,move,stepVel={1},vel={2},mass={3},moveForce={4}",
                             m_controllingPrim.LocalID, stepVelocity, m_controllingPrim.RawVelocity, m_controllingPrim.Mass, moveForce);
             m_physicsScene.PE.ApplyCentralImpulse(m_controllingPrim.PhysBody, moveForce);