/*
 * Author: Garth 'L-H' de Wet
 * Displays the altimeter on screen.
 *
 * Arguments:
 * 0: unit <OBJECT>
 *
 * Return Value:
 * None
 *
 * Example:
 * [player] call ACE_Parachute_fnc_showAltimeter
 *
 * Public: Yes
 */
#include "script_component.hpp"
private ["_unit"];
_unit = _this select 0;
(["ACE_Altimeter"] call BIS_fnc_rscLayer) cutRsc ["ACE_Altimeter", "PLAIN",0,true];
if (isNull (uiNamespace getVariable ["ACE_Altimeter", displayNull])) exitWith {};

GVAR(AltimeterActive) = true;
[{
	if (!GVAR(AltimeterActive)) exitWith {[_this select 1] call CALLSTACK(cba_fnc_removePerFrameEventHandler);};
	disableSerialization;
	EXPLODE_4_PVT(_this select 0,_display,_unit,_oldHeight,_prevTime);
	if !("ACE_Altimeter" in assignedItems _unit) exitWith {[_this select 1] call CALLSTACK(cba_fnc_removePerFrameEventHandler);call FUNC(hideAltimeter);};

	private ["_height", "_hour", "_minute", "_descentRate","_HeightText", "_DecendRate", "_TimeText", "_curTime"];
	_HeightText = _display displayCtrl 1100;
	_DecendRate = _display displayCtrl 1000;
	_TimeText = _display displayCtrl 1001;
	_hour = floor daytime;
	_minute = floor ((daytime - _hour) * 60);

	_height = (getPosASL _unit) select 2;
	_curTime = time;
	_descentRate = floor ((_oldHeight - _height) / (_curTime - _prevTime));

	_TimeText ctrlSetText (format ["%1:%2",[_hour, 2] call EFUNC(common,numberToDigitsString),[_minute, 2] call EFUNC(common,numberToDigitsString)]);
	_HeightText ctrlSetText (format ["%1", floor(_height)]);
	_DecendRate ctrlSetText (format ["%1", _descentRate max 0]);

	(_this select 0) set [2, _height];
	(_this select 0) set [3, _curTime];
}, 0.2, [uiNamespace getVariable ["ACE_Altimeter", displayNull], _unit,floor ((getPosASL _unit) select 2), time]] call CALLSTACK(cba_fnc_addPerFrameHandler);