//===========================================================================//
// File:	hud.cpp                                                             //
// Project: BattleTech           Brick: Mech subsystems                       //
// Contents: HUD -- head-up display / targeting reticle                      //
//---------------------------------------------------------------------------//
// Copyright (C) 1995, Virtual World Entertainment, Inc.                     //
// All Rights reserved worldwide                                             //
// This unpublished sourcecode is PROPRIETARY and CONFIDENTIAL               //
//===========================================================================//

#include <bt.hpp>
#pragma hdrstop

#if !defined(HUD_HPP)
#	include <hud.hpp>
#endif

#if !defined(MECH_HPP)
#	include <mech.hpp>
#endif

static const Point3D HudZeroVector(0.0f, 0.0f, 0.0f);

Derivation
	HUD::ClassDerivations(
		PowerWatcher::ClassDerivations,
		"HUD"
	);

HUD::SharedData
	HUD::DefaultData(
		HUD::ClassDerivations,
		Subsystem::MessageHandlers,
		Subsystem::AttributeIndex,
		Subsystem::StateCount
	);

HUD::HUD(
	Mech				*owner,
	int					subsystem_ID,
	SubsystemResource	*subsystem_resource,
	SharedData			&shared_data
):
	PowerWatcher(owner, subsystem_ID, subsystem_resource, shared_data)
{
	Check(owner);
	Check_Pointer(subsystem_resource);

	flickerRate					= 0.0f;
	rotationOfTorsoHorizontal	= 0.0f;
	torsoLimitRight				= 0.0f;
	torsoLimitLeft				= 0.0f;
	torsoSpeed					= 0.0f;
	rangeToTarget				= 0.0f;
	scratch1F0					= 0;
	visible						= True;
	lockFlag					= False;
	hotBoxVector				= HudZeroVector;
	threatVector				= HudZeroVector;
	compassHeading				= 0.0f;
	blinkTimer					= 0.0f;
	flickerTimer				= 0.0f;
	blinkState					= True;
	transitionFlag				= False;
	previousHorizontal			= 0.0f;

	statusAlarm.Initialize(2);

	freeAimSlew					= 0.0f;
	scratch290					= 0.0f;
	horizontalTorsoOffset		= 0.0f;

	flickerRate					= subsystem_resource->flickerRate;
	horizontalMovementPerSecond	= subsystem_resource->horizontalMovementPerSecond;
	horizontalLimit				= subsystem_resource->horizontalLimit;

	//
	// The torso-orientation source is a Mech link not yet live at
	// construction time; HudSimulation refreshes these per-frame.
	//
	linkedEntity				= 0;
	flickerActive				= 0;

	Check_Fpu();
}

HUD::~HUD()
{
}

Logical
	HUD::TestClass(Mech &)
{
	return True;
}

Logical
	HUD::TestInstance() const
{
	return IsDerivedFrom(ClassDerivations);
}

//
// Per-frame reticle / compass / lock-ring update.  Not yet reconstructed.
//
void
	HUD::HudSimulation(Scalar)
{
	Fail("HUD::HudSimulation -- hud.cpp not yet reconstructed");
}