From 2c761cef192670a6f54fe10bb5b5894b5371ea7c Mon Sep 17 00:00:00 2001 From: Robert Adams Date: Tue, 9 Jul 2013 09:33:46 -0700 Subject: BulletSim: add parameter to optionally disable vehicle linear deflection. Add parameter to not apply vehicle linear deflection Z forces if vehicle is not colliding. This defaults to 'true' so vehicles will fall even if there is some linear deflection to apply. --- OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs | 42 ++++++++++++++-------- OpenSim/Region/Physics/BulletSPlugin/BSParam.cs | 8 ++++- 2 files changed, 34 insertions(+), 16 deletions(-) (limited to 'OpenSim/Region/Physics/BulletSPlugin') diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs index a5f2e98..0204967 100644 --- a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs +++ b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs @@ -905,6 +905,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin return VehicleVelocity * Quaternion.Inverse(Quaternion.Normalize(VehicleOrientation)); } } + private float VehicleForwardSpeed { get @@ -1040,26 +1041,37 @@ namespace OpenSim.Region.Physics.BulletSPlugin Vector3 linearDeflectionV = Vector3.Zero; Vector3 velocityV = VehicleForwardVelocity; - // Velocity in Y and Z dimensions is movement to the side or turning. - // Compute deflection factor from the to the side and rotational velocity - linearDeflectionV.Y = SortedClampInRange(0, (velocityV.Y * m_linearDeflectionEfficiency) / m_linearDeflectionTimescale, velocityV.Y); - linearDeflectionV.Z = SortedClampInRange(0, (velocityV.Z * m_linearDeflectionEfficiency) / m_linearDeflectionTimescale, velocityV.Z); + if (BSParam.VehicleEnableLinearDeflection) + { + // Velocity in Y and Z dimensions is movement to the side or turning. + // Compute deflection factor from the to the side and rotational velocity + linearDeflectionV.Y = SortedClampInRange(0, (velocityV.Y * m_linearDeflectionEfficiency) / m_linearDeflectionTimescale, velocityV.Y); + linearDeflectionV.Z = SortedClampInRange(0, (velocityV.Z * m_linearDeflectionEfficiency) / m_linearDeflectionTimescale, velocityV.Z); - // Velocity to the side and around is corrected and moved into the forward direction - linearDeflectionV.X += Math.Abs(linearDeflectionV.Y); - linearDeflectionV.X += Math.Abs(linearDeflectionV.Z); + // Velocity to the side and around is corrected and moved into the forward direction + linearDeflectionV.X += Math.Abs(linearDeflectionV.Y); + linearDeflectionV.X += Math.Abs(linearDeflectionV.Z); - // Scale the deflection to the fractional simulation time - linearDeflectionV *= pTimestep; + // Scale the deflection to the fractional simulation time + linearDeflectionV *= pTimestep; - // Subtract the sideways and rotational velocity deflection factors while adding the correction forward - linearDeflectionV *= new Vector3(1,-1,-1); + // Subtract the sideways and rotational velocity deflection factors while adding the correction forward + linearDeflectionV *= new Vector3(1, -1, -1); - // Correciont is vehicle relative. Convert to world coordinates and add to the velocity - VehicleVelocity += linearDeflectionV * VehicleOrientation; + // Correction is vehicle relative. Convert to world coordinates. + Vector3 linearDeflectionW = linearDeflectionV * VehicleOrientation; - VDetailLog("{0}, MoveLinear,LinearDeflection,linDefEff={1},linDefTS={2},linDeflectionV={3}", - ControllingPrim.LocalID, m_linearDeflectionEfficiency, m_linearDeflectionTimescale, linearDeflectionV); + // Optionally, if not colliding, don't effect world downward velocity. Let falling things fall. + if (BSParam.VehicleLinearDeflectionNotCollidingNoZ && !m_controllingPrim.IsColliding) + { + linearDeflectionW.Z = 0f; + } + + VehicleVelocity += linearDeflectionW; + + VDetailLog("{0}, MoveLinear,LinearDeflection,linDefEff={1},linDefTS={2},linDeflectionV={3}", + ControllingPrim.LocalID, m_linearDeflectionEfficiency, m_linearDeflectionTimescale, linearDeflectionV); + } } public void ComputeLinearTerrainHeightCorrection(float pTimestep) diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs b/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs index 75c3399..dcf1e83 100755 --- a/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs +++ b/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs @@ -155,6 +155,8 @@ public static class BSParam public static Vector3 VehicleInertiaFactor { get; private set; } public static float VehicleGroundGravityFudge { get; private set; } public static float VehicleAngularBankingTimescaleFudge { get; private set; } + public static bool VehicleEnableLinearDeflection { get; private set; } + public static bool VehicleLinearDeflectionNotCollidingNoZ { get; private set; } public static bool VehicleEnableAngularVerticalAttraction { get; private set; } public static int VehicleAngularVerticalAttractionAlgorithm { get; private set; } public static bool VehicleEnableAngularDeflection { get; private set; } @@ -609,10 +611,14 @@ public static class BSParam 0.2f ), new ParameterDefn("VehicleAngularBankingTimescaleFudge", "Factor to multiple angular banking timescale. Tune to increase realism.", 60.0f ), + new ParameterDefn("VehicleEnableLinearDeflection", "Turn on/off vehicle linear deflection effect", + true ), + new ParameterDefn("VehicleLinearDeflectionNotCollidingNoZ", "Turn on/off linear deflection Z effect on non-colliding vehicles", + true ), new ParameterDefn("VehicleEnableAngularVerticalAttraction", "Turn on/off vehicle angular vertical attraction effect", true ), new ParameterDefn("VehicleAngularVerticalAttractionAlgorithm", "Select vertical attraction algo. You need to look at the source.", - 1 ), + 0 ), new ParameterDefn("VehicleEnableAngularDeflection", "Turn on/off vehicle angular deflection effect", true ), new ParameterDefn("VehicleEnableAngularBanking", "Turn on/off vehicle angular banking effect", -- cgit v1.1