//===========================================================================//
// File:	torso.hpp                                                           //
// Project: BattleTech           Brick: Mech subsystems                       //
// Contents: Torso -- the torso twist / weapon-elevation subsystem           //
//---------------------------------------------------------------------------//
// Copyright (C) 1995, Virtual World Entertainment, Inc.                     //
// All Rights reserved worldwide                                             //
// This unpublished sourcecode is PROPRIETARY and CONFIDENTIAL               //
//===========================================================================//

#if !defined(TORSO_HPP)
#	define TORSO_HPP

#	if !defined(POWERSUB_HPP)
#		include <powersub.hpp>
#	endif

//#####################    Forward Class Declarations  #######################
	class Mech;
	class Joint;

//###########################################################################
//#####################   Torso Model Resource   ###########################
//###########################################################################

	struct Torso__SubsystemResource:
		public PowerWatcher::SubsystemResource
	{
		Scalar	horizontalRotationPerSecond;
		Scalar	verticalRotationPerSecond;
		Scalar	horizontalLimitRight;
		Scalar	horizontalLimitLeft;
		Scalar	verticalLimitTop;
		Scalar	verticalLimitBottom;
		char	torsoHorizontalJoint[32];
		char	torsoHorizontalShadowJoint[32];
		Logical	torsoHorizontalEnabled;
		Scalar	buttonAccelerationPerSecond;
		Scalar	buttonAccelerationStartValue;
	};

//###########################################################################
//###############################   Torso   ################################
//###########################################################################
//
// Drives torso twist (horizontal) and weapon elevation (vertical).  The
// tuning rates/limits come from the resource; the live twist/elevation state
// and the resolved skeleton joints are advanced by the per-frame
// TorsoSimulation (staged) once the Mech skeleton link is live.
//
	class Torso:
		public PowerWatcher
	{
	public:
		static Derivation ClassDerivations;
		static SharedData DefaultData;

		typedef void
			(Torso::*Performance)(Scalar time_slice);
		void
			SetPerformance(Performance performance)
			{
				Check(this);
				activePerformance = (Simulation::Performance)performance;
			}

		static Logical
			TestClass(Mech &);
		Logical
			TestInstance() const;
		Scalar
			CurrentTwist() const		{ Check(this); return currentTwist; }
		Scalar
			CurrentElevation() const	{ Check(this); return currentElevation; }
		Logical
			GetHorizontalEnabled() const{ Check(this); return horizontalEnabled; }

		//
		// Analog aim inputs (written by MechControlsMapper::InterpretControls;
		// consumed by TorsoSimulation to slew the twist/elevation each frame).
		//
		void
			SetAnalogElevationAxis(Scalar axis)	{ Check(this); analogElevationAxis = axis; }
		void
			SetAnalogTwistAxis(Scalar axis)		{ Check(this); analogTwistAxis = axis; }

		void
			TorsoSimulation(Scalar time_slice);
		void
			TorsoCopySimulation(Scalar time_slice);

	public:
		typedef Torso__SubsystemResource SubsystemResource;

		Torso(
			Mech						*owner,
			int							subsystem_ID,
			SubsystemResource			*subsystem_resource,
			SharedData					&shared_data = DefaultData
		);
		~Torso();

	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	// Attribute publication.  The shipped string pool lists this class's
	// attribute names contiguously after the class name "Torso":
	//
	//     RotationOfTorsoVertical  RotationOfTorsoHorizontal
	//     HorizontalLimitRight  HorizontalLimitLeft
	//     SpeedOfTorsoVertical  SpeedOfTorsoHorizontal
	//
	// The FULL authentic table, ids 3..15, confirmed twice over: the BT411
	// donor's decompiled enum carries these names WITH binary member offsets
	// (torso.hpp 111-124, @0x1E4..@0x20C), and BTL4.RES's own streamed
	// control mappings bind ids 12/13 as DIRECT button destinations on
	// subsystem 17 = Torso (the [map] audit).
	//
	// An earlier revision declared "TorsoUp/Down/Left/Right/Center are
	// MESSAGES, not attributes" and stopped at 7 entries with MotionState at
	// id 9.  That was WRONG in a specifically nasty way: the ids are the
	// binding key for the streamed mappings, so Thrustmaster's buttons
	// (12/13) resolved NULL -- the boot write-fault at
	// ControlsInstanceDirectOf<int>::Update+0xE -- and the RIO's ANALOG
	// StickPosition (9) resolved to our motionState StateIndicator, letting
	// every analog update from a live RIO smash a watcher-socketed object
	// with raw floats.
	//
	// The chain -- PowerWatcher -> HeatWatcher -> MechSubsystem -- publishes
	// nothing of its own, so these start at MechSubsystem::NextAttributeID.
	//
	public:
		enum {
			RotationOfTorsoVerticalAttributeID = MechSubsystem::NextAttributeID,
			RotationOfTorsoHorizontalAttributeID,
			HorizontalLimitRightAttributeID,
			HorizontalLimitLeftAttributeID,
			SpeedOfTorsoVerticalAttributeID,
			SpeedOfTorsoHorizontalAttributeID,
			StickPositionAttributeID,
			TorsoUpAttributeID,
			TorsoDownAttributeID,
			TorsoLeftAttributeID,
			TorsoRightAttributeID,
			TorsoCenterAttributeID,
			MotionStateAttributeID,
			NextAttributeID
		};

		static const IndexEntry AttributePointers[];
		static AttributeIndexSet AttributeIndex;

	protected:
		int		isDamagedCopy;
		int		statusFlags;
		Logical	horizontalEnabled;
		Scalar	baseTwistRate;
		Scalar	baseElevationRate;
		Scalar	horizontalLimitRight;
		Scalar	horizontalLimitLeft;
		Scalar	verticalLimitTop;
		Scalar	verticalLimitBottom;
		Scalar	twistCenterHigh;
		Scalar	twistCenterLow;
		Scalar	elevationCenter;
		Scalar	elevationHalfBottom;
		Scalar	buttonAccelerationPerSecond;
		Scalar	buttonAccelerationStart;
		int		buttonRampActive;
		Scalar	buttonRamp;
		Joint	*horizontalJointNode;
		Joint	*horizontalShadowJointNode;
		Scalar	currentTwist;
		Scalar	currentElevation;
		Scalar	analogElevationAxis;
		Scalar	analogTwistAxis;
		//
		// MUST BE A StateIndicator.  The authored watcher for a *State
		// name is an AudioStateWatcher, which is AudioWatcherOf<StateIndicator>
		// and whose ctor immediately runs
		//     Cast_Object(StateIndicator*, attributePointer)->AddAudioWatcher(this)
		// (AUDWTHR.CPP:891).  Point it at a plain int and that call goes
		// through garbage -- the pod dies on the extender.
		//
		StateIndicator	motionState;	// authored watcher
		//
		// The five BUTTON COMMAND destinations (donor torso.hpp @0x1F8-0x208).
		// The streamed control mappings bind these BY ID as DIRECT WRITE
		// targets -- LBE4ControlsManager::CreateStreamedMappings registers
		// GetAttributePointer(attributeID) as the destination a device poll
		// writes through (L4CTRL.CPP:1936).  Carved from the front of the
		// dynamicsState reserve so the class size is unchanged.
		//
		int		elevateUpCommand;
		int		elevateDownCommand;
		int		twistLeftCommand;
		int		twistRightCommand;
		int		centerCommand;
		//
		// Recenter latch (donor @0x268-adjacent family): armed by the centre
		// button, cleared by a twist button or on arrival at centre.
		//
		int		recenterActive;
		//
		// Twist/elevation dynamics accumulators advanced by TorsoSimulation.
		// Reserved until the per-frame sim is reconstructed (phase 5).
		//
		Scalar	dynamicsState[16];
	};

#endif