ACE3/addons/common/functions/fnc_getTargetDistance.sqf
2015-09-21 13:08:10 +02:00

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/*
* Author: commy2
* Get the distance to the next object the player is looking at. Used for laser distance measurements.
*
* Arguments:
* 0: Messurement Accuracy <NUMBER>
* 1: Maximal messure distance <NUMBER>
* 2: Minimal messure distance (default: nil) <NUMBER>
*
* Return Value:
* Distance in meters <NUMBER>
*
* Public: Yes
*/
#include "script_component.hpp"
params ["_interval", "_maxDistance", "_minDistance"];
private ["_position", "_laser", "_line", "_distance", "_iteration"];
_position = ATLToASL positionCameraToWorld [0, 0, 0];
_position set [2, (_position select 2) - (getTerrainHeightASL _position min 0)];
_laser = + _position;
_line = [_position, _laser];
_distance = _maxDistance;
_iteration = _distance;
while {
_iteration > _interval / 2
} do {
_iteration = _iteration / 2;
_laser = ATLToASL positionCameraToWorld [0, 0, _distance];
_laser set [2, (_laser select 2) - (getTerrainHeightASL _laser min 0)];
_line set [1, _laser];
_distance = _distance + (([1, -1] select (lineIntersects (_line + [vehicle ACE_player]) || {terrainIntersectASL _line})) * _iteration);
};
_distance = _interval * round (_distance / _interval);
_distance = _distance min _maxDistance;
if (!isNil "_minDistance") then {_distance = _distance max _minDistance};
_distance