ACE3/addons/common/functions/fnc_worldToScreenBounds.sqf
2015-09-17 18:25:02 +02:00

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/*
* Author: zGuba 2011
*
* Function helper for framing objects on screen.
*
* Arguments:
* 0: object <OBJECT>
* 1: margins 3D <ARRAY>
* 0: X <NUMBER>
* 1: Y <NUMBER>
* 2: Z <NUMBER>
* 2: offset 3D <ARRAY>
* 0: X <NUMBER>
* 1: Y <NUMBER>
* 2: Z <NUMBER>
*
* Return Value:
* 0: Minimal X <NUMMBER>
* 1: Minimal Y <NUMMBER>
* 2: Maximal X <NUMMBER>
* 3: Maximal Y <NUMMBER>
*
* Public: No
*/
#include "script_component.hpp"
params ["_object", "_margins", "_offsets"];
private ["_minX", "_minY", "_maxX", "_maxY", "_bounds", "_boundsCorners"];
_minX = 10;
_minY = 10;
_maxX = -10;
_maxY = -10;
_bounds = boundingBox _object;
_margins params ["_marginsX", "_marginsY", "_marginsZ"];
_offsets params ["_offsetsX", "_offsetsY", "_offsetsZ"];
_bounds params ["_boundsMin", "_boundsMax"];
_boundsMin params ["_boundsMinX", "_boundsMinY", "_boundsMinZ"];
_boundsMax params ["_boundsMaxX", "_boundsMaxY", "_boundsMaxZ"];
_boundsMinX = _boundsMinX - _marginsX + _offsetsX;
_boundsMinY = _boundsMinY - _marginsY + _offsetsY;
_boundsMinZ = _boundsMinZ - _marginsZ + _offsetsZ;
_boundsMaxX = _boundsMaxX + _marginsX + _offsetsX;
_boundsMaxY = _boundsMaxY + _marginsY + _offsetsY;
_boundsMaxZ = _boundsMaxZ + _marginsZ + _offsetsZ;
_boundsCorners = [
[_boundsMinX,_boundsMinY,_boundsMinZ],
[_boundsMinX,_boundsMinY,_boundsMaxZ],
[_boundsMinX,_boundsMaxY,_boundsMinZ],
[_boundsMinX,_boundsMaxY,_boundsMaxZ],
[_boundsMaxX,_boundsMinY,_boundsMinZ],
[_boundsMaxX,_boundsMinY,_boundsMaxZ],
[_boundsMaxX,_boundsMaxY,_boundsMinZ],
[_boundsMaxX,_boundsMaxY,_boundsMaxZ]
];
{
private "_ppos";
_ppos = worldToScreen (_object modelToWorld _x);
if (count _ppos >= 2) then {
_ppos params ["_pposX", "_pposY"];
if (_pposX < _minX) then {_minX = _pposX};
if (_pposX > _maxX) then {_maxX = _pposX};
if (_pposY < _minY) then {_minY = _pposY};
if (_pposY > _maxY) then {_maxY = _pposY};
}; //else - what to do if it is offscreen?
false
} count _boundsCorners;
[_minX,_minY,_maxX,_maxY]