SimulationSpace.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "Chaos/Core.h"
 
namespace Chaos
{
    class FSimulationSpace
    {
    public:
        FSimulationSpace()
            : LinearAcceleration(0)
            , AngularAcceleration(0)
            , LinearVelocity(0)
            , AngularVelocity(0)
        {
        }
 
        // All properties should be in simulation space
        FVec3 LinearAcceleration;
        FVec3 AngularAcceleration;
        FVec3 LinearVelocity;
        FVec3 AngularVelocity;
    };
 
    class FSimulationSpaceSettings
    {
    public:
        FSimulationSpaceSettings()
            : MasterAlpha(0)
            , Alpha(0)
            , bEnabled(false)
            , LinearAccelerationAlpha(1)
            , CoriolisAlpha(1)
            , CentrifugalAlpha(1)
            , EulerAlpha(1)
            , AngularAccelerationAlpha(1)
            , LinearVelocityAlpha(1)
            , AngularVelocityAlpha(1)
            , ExternalLinearEtherDrag(FVec3(0))
        {
        }
 
PRAGMA_DISABLE_DEPRECATION_WARNINGS
        FSimulationSpaceSettings(const FSimulationSpaceSettings&) = default;
        FSimulationSpaceSettings& operator=(const FSimulationSpaceSettings&) = default;
PRAGMA_ENABLE_DEPRECATION_WARNINGS
 
        UE_DEPRECATED(5.1, "MasterAlpha is deprecated - please use bEnabled")
        FReal MasterAlpha;
 
        UE_DEPRECATED(5.6, "Alpha is deprecated - please use bEnabled")
        FReal Alpha;
 
        // Enable or disable simulation space.
        bool bEnabled;
 
        // How much of the simulation frame's linear acceleration to pass onto the particles
        FReal LinearAccelerationAlpha;
 
        // How much of the coriolis force to apply to the particles
        FReal CoriolisAlpha;
 
        // How much of the centrifugal force to apply to the particles
        FReal CentrifugalAlpha;
 
        // How much of the euler force to apply to the particles
        FReal EulerAlpha;
 
        // How much of the simulation frame's angular acceleration to pass onto the particles
        FReal AngularAccelerationAlpha;
 
        // How much of the simulation frame's linear velocity to pass onto the particles (linear ether drag)
        FReal LinearVelocityAlpha;
 
        // How much of the simulation frame's angular velocity to pass onto the particles (angular ether drag)
        FReal AngularVelocityAlpha;
 
        // An additional linear drag on top of the EtherDrag that can be set on the physics asset. Vector in simulation local space.
        FVec3 ExternalLinearEtherDrag;
    };
 
}