57 lines
2 KiB
C++
57 lines
2 KiB
C++
// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
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// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
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// SPDX-License-Identifier: MIT
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#pragma once
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#include <Jolt/ObjectStream/SerializableObject.h>
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#include <Jolt/Core/LinearCurve.h>
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#include <Jolt/Core/StreamIn.h>
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#include <Jolt/Core/StreamOut.h>
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#include <Jolt/Physics/StateRecorder.h>
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JPH_NAMESPACE_BEGIN
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/// On which side of the vehicle the track is located (for steering)
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enum class ETrackSide : uint
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{
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Left = 0,
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Right = 1,
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Num = 2
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};
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/// Generic properties for tank tracks
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class JPH_EXPORT VehicleTrackSettings
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{
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JPH_DECLARE_SERIALIZABLE_NON_VIRTUAL(JPH_EXPORT, VehicleTrackSettings)
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public:
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/// Saves the contents in binary form to inStream.
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void SaveBinaryState(StreamOut &inStream) const;
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/// Restores the contents in binary form to inStream.
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void RestoreBinaryState(StreamIn &inStream);
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uint mDrivenWheel; ///< Which wheel on the track is connected to the engine
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Array<uint> mWheels; ///< Indices of wheels that are inside this track, should include the driven wheel too
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float mInertia = 10.0f; ///< Moment of inertia (kg m^2) of the track and its wheels as seen on the driven wheel
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float mAngularDamping = 0.5f; ///< Damping factor of track and its wheels: dw/dt = -c * w as seen on the driven wheel
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float mMaxBrakeTorque = 15000.0f; ///< How much torque (Nm) the brakes can apply on the driven wheel
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float mDifferentialRatio = 6.0f; ///< Ratio between rotation speed of gear box and driven wheel of track
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};
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/// Runtime data for tank tracks
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class JPH_EXPORT VehicleTrack : public VehicleTrackSettings
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{
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public:
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/// Saving state for replay
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void SaveState(StateRecorder &inStream) const;
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void RestoreState(StateRecorder &inStream);
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float mAngularVelocity = 0.0f; ///< Angular velocity of the driven wheel, will determine the speed of the entire track
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};
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using VehicleTracks = VehicleTrack[(int)ETrackSide::Num];
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JPH_NAMESPACE_END
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