/*
 * Author: F3 Project, Head, SilentSpike
 * Handles free camera manipulation according to input
 *
 * Arguments:
 * None <NIL>
 *
 * Return Value:
 * None <NIL>
 *
 * Example:
 * [ace_spectator_fnc_handleCamera, 0] call CBA_fnc_addPerFrameHandler;
 *
 * Public: No
 */

#include "script_component.hpp"

// Kill PFH when not in free cam (or display is closed)
if (isNil QGVAR(camHandler)) exitWith { [_this select 1] call CBA_fnc_removePerFrameHandler; };

private ["_oldPos","_mX","_mY","_mZ","_pan","_x","_y","_z"];

_oldPos = getPosASL GVAR(camera);
_mX = 0;
_mY = 0;
_mZ = 0;
if (GVAR(camDolly) select 0) then { // Forward
    _mY = _mY + GVAR(camSpeed);
};
if (GVAR(camDolly) select 1) then { // Backward
    _mY = _mY - GVAR(camSpeed);
};
if (GVAR(camDolly) select 2) then { // Left
    _mX = _mX - GVAR(camSpeed);
};
if (GVAR(camDolly) select 3) then { // Right
    _mX = _mX + GVAR(camSpeed);
};
if (GVAR(camBoom) select 0) then { // Up
    _mZ = _mZ + 0.5;
};
if (GVAR(camBoom) select 1) then { // Down
    _mZ = _mZ - 0.5;
};

_pan = (GVAR(camPan) + 360) % 360;
_x = (_oldPos select 0) + (_mX * cos(_pan)) + (_mY * sin(_pan));
_y = (_oldPos select 1) - (_mX * sin(_pan)) + (_mY * cos(_pan));
_z = (_oldPos select 2) + _mZ;

// Prevent camera going under terrain
GVAR(camPos) = [_x,_y,_z max (getTerrainHeightASL [_x,_y])];

// Update camera position and rotation
GVAR(camera) setPosASL GVAR(camPos);
GVAR(camera) setDir GVAR(camPan);
[GVAR(camera), GVAR(camTilt), GVAR(camBank)] call BIS_fnc_setPitchBank;