Help: dynamic furnishing sctipt

[o5_ 7]

Need a little help... What I hope to achieve with my script is to furnish structures passed to it. The plan is to profile the building based on its type so we dont outfit a mud-hut with big screen TV and such. I need help with placement. I think the best way is to get the boundingboxreal of an object or furniture and then check it for collision/intersection (of structure walls and such) based on one of the randomly selected building positions. Every time I run lineIntersectsSurface it returns null objects. What's the best way to accomplish this? Thanks guys! This community is the best!

 

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[Savage_Donkey 243]

Have you taken a look at the TPW furniture script?  It's part of TPW mods and does what you're looking for.  

[o5_ 7]

No... I'll check it out tonight. Thanks.

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[Midnighters 152]

use 

configClasses

in combo with the base class name:

"ThingX"

 

it'll pull all of those out as a config entry

 

so:

 

"(configName (_x)) isKindOf['ThingX',configFile >> 'CfgVehicles']" configClasses(configFile >> "CfgVehicles");

and to extract the classname

(getText(_x >> "_generalMacro"));

 

[o5_ 7]

Thanks midnighters. I wasn't familiar with _generalMacro. Do you have any suggestions for finding a suitable location inside a structure?

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[Midnighters 152]

1 hour ago, o5_ said:

Thanks midnighters. I wasn't familiar with _generalMacro. Do you have any suggestions for finding a suitable location inside a structure?

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These two commands are great for  this very thing:

buildingPos

and

buildingExit

 

_generalMacro is what the game uses to reference the config entry. So for weapons like "SMG_04" that'd refer to the Protector 9MM I Believe.

 

Take a look at the buildingPos command specifically,

Quote

Since Arma 3 v.155.133934 if index -1 is supplied, the command will return array with all available positions.

 

 

that'll allow you to either select a random building position or select a specific one. 

[o5_ 7]

Again I appreciate your help. I already use this command. I guess i didn't add enough info. I have selected the structure and even selected a random position in the building but sometime when I spawn a piece of furniture it clips walls and bugs out. I need a pre-check to see if the object will spawn without touching walls. I imagine lineIntersectsSurface could work but I cant make sense of the return.

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[Midnighters 152]

2 hours ago, o5_ said:

Again I appreciate your help. I already use this command. I guess i didn't add enough info. I have selected the structure and even selected a random position in the building but sometime when I spawn a piece of furniture it clips walls and bugs out. I need a pre-check to see if the object will spawn without touching walls. I imagine lineIntersectsSurface could work but I cant make sense of the return.

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Oh. Awesome, sounds like you've got it covered then.

[o5_ 7]

SMH.... No, no I don't. I need an intersection/collision/proximity check to ensure my furniture doesn't bug out from clipping on walls or anything for that matter.

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[o5_ 7]

So I looked at the TPW mods script and it's far simpler than I imagined, which is a good thing, but not dynamic. They use prearranged templates based on the structure. My idea is to PREDETERMINE what furniture to use based on the structure, BUT the placement would be completely random and/or dynamic.

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[Midnighters 152]

2 hours ago, o5_ said:

So I looked at the TPW mods script and it's far simpler than I imagined, which is a good thing, but not dynamic. They use prearranged templates based on the structure. My idea is to PREDETERMINE what furniture to use based on the structure, BUT the placement would be completely random and/or dynamic.

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I think the idea is great, but it may be beyond anybody's ability right now to do so :(

[o5_ 7]

Making progress... here is what I have so far.r.

fnc_furniture_placement = {
    _position = (_this param [0, [], [[]]]);
    _object   = (_this param [1]);

    _bbr      = (boundingBoxReal _object);
    _house    = 0;
        
    {
        _pos1ATL = (_position vectorAdd (_x select 0));
        _pos2ATL = (_position vectorAdd (_x select 1));
        _pos1ASL = (ATLtoASL _pos1ATL);
        _pos2ASL = (ATLtoASL _pos2ATL);
        lineIntersectsSurfaces [
            _pos1ASL, 
            _pos2ASL,
            objNull, objNull, true, 1, "GEOM", "NONE"
        ] select 0 params ["","","","_house"];

        _color = [1,1,1,1];
        if (not ([_house,0] call BIS_fnc_areEqual)) then {
            hint str _house;
            _color = [1,0,0,1];
        };

        [[_pos1ATL,_pos2ATL],_color] call fnc_line;
    } forEach [_bbr];
};

fnc_line =
{
    [(_this select 0), (_this select 1)] spawn {
        _pos = (_this select 0);
        _pos1 = (_pos select 0);
        _pos2 = (_pos select 1);
        waitUntil {
            drawLine3d [_pos1, _pos2, (_this select 1)];
        };
    };
};

_building = (nearestBuilding (getMarkerPos "house")); 
_buildingPositions = ([_building] call BIS_fnc_buildingPositions);
_numberOfPositions = (count _buildingPositions);

_table  = ("OfficeTable_01_new_F" createVehicle [0,0,0]);
_house_pos = 0;

while {true} do
{
    _house_pos = (_building buildingPos (floor (random (_numberOfPositions))));
    _house_pos set [2,((_house_pos select 2) + .5)];
    [_house_pos, _table] call fnc_furniture_placement;
    sleep 6;
};

 

the issue is this only checks along a line from 1 boundingBox corner to the other. I think I should run 4 lineIntersectsSurface check for every boundingBox corner. Does anyone know

how I can do this?

 

[sarogahtyp 1108]

The following thoughts are very simple and it might be that they are not fitting your problem correct.

It might be that you have to use some more complex math to get ur desired points to intersect.

What I can say is that the following is correct if the bounding box is not rotated away from x, y and z axis of the grid.

 

What you are intersect upto now is

from  x1,y1,z1 to x2,y2,z2

 

these are the checks that u want additionally:

 

from x1, y2, z1 to x2, y1, z2

from x2, y1, z1 to x1, y2, z2

from x2, y2, z1 to x1,y1, z2

[Grumpy Old Man 3546]

Could be an easier approach:

1. Place furniture inside a building
2. Get the building object via cursortarget
3. Make an array containing furniture type, direction and position (_building worldToModel (ASLtoAGL (getPosATL _furniture)))
4. Repeat step 1-3 until you have a few furniture variations for that building
5. Spawn random furniture template based on building type using modelToWorld and the previously stored position

If there's interest I could try to work out something like this.

 

Cheers

[o5_ 7]

Thanks sarogahtyp! One more question... how can i simulate the rotation of the object as all my tests show the boundingBox vectors as if the object was at 0*. like _object setDir 0; ? Thanks for the help. 

 

 

[sarogahtyp 1108]

Man! A friend of mine who is mathematician would say: "This is NOT superficial!"

 

but I ll look if I can find some math u could use. but it ll take a while. maybe u r faster if u look urself which math is needed to rotate things in space.

[sarogahtyp 1108]

I did find all things you could need. if I understood all of this again and can tell u how u can use it then then I ll post it :-)

 

Info you need:

https://www.youtube.com/watch?v=gj6TJEyazO8

 

tensor_build.sqf

/*
 File tensor_build.sqf
 Description: builds a rotation tensor which is needed to rotate a vector in space

 Arguments: 	
	0 - desired rotation angle for x-axis
	1 - desired rotation angle for y-axis
	2 - desired rotation angle for z-axis
				
 Return value:  rotation tensor
*/


private [
	"_ct",
	"_cr",
	"_cp",
	"_st",
	"_sr",
	"_sp",
	"_rotation"
];

_ct = cos(_this select 0);
_cr = cos(_this select 1);
_cp = cos(_this select 2);
_st = sin(_this select 0);
_sr = sin(_this select 1);
_sp = sin(_this select 2);

_rotation = [
	[_cp*_cr, -1*_sp*_ct + _cp*_sr*_st, _sp*_st + _cp*_sr*_ct],
	[_sp*_cr, _cp*_ct + _sp*_sr*_st, -1*_cp*_st + _sp*_sr*_ct],
	[-1*_sr, _cr*_st, _cr*_ct]
];

_rotation

 

tensor_apply.sqf

/*
 File tensor_apply.sqf
 Description: rotates a vector with usage of the prior build rotation tensor

 Arguments: 	
	0 - vector which should be rotated
	1 - rotation tensor

 Return value:  rotated vector
*/

private[
	"_v",
	"_r",
	"_r0",
	"_r1",
	"_r2",
	"_newVector"
];

_v = _this select 0;
_r = _this select 1;

_r0 = _r select 0;
_r1 = _r select 1;
_r2 = _r select 2;

_newVector = [
	(_v select 0)*(_r0 select 0) + (_v select 1)*(_r1 select 0) + (_v select 2)*(_r2 select 0),
	(_v select 0)*(_r0 select 1) + (_v select 1)*(_r1 select 1) + (_v select 2)*(_r2 select 1),
	(_v select 0)*(_r0 select 2) + (_v select 1)*(_r1 select 2) + (_v select 2)*(_r2 select 2)
];

_newVector

Edited April 8, 2017 by sarogahtyp
Added headers to scripts

[o5_ 7]

You're a great help and I appreciate it! I'm testing now.

[sarogahtyp 1108]

these are arma 2 scripts. u should use params in it instead of those "_this select x" lines.

[sarogahtyp 1108]

how it works:

 

tensor_build.sqf  has 3 input parameters. these are the angles a vector should be rotated with. so you have to pass ur desired rotation angles for x, y and z axis.

the script returns a rotation tensor which is used in tensor_apply.sqf

 

tensor_apply. sqf has 2 input parameters. the vector which should be rotated and the rotation tensor which was returned by tensor_build. sqf

It just returns the rotated vector.

 

EDIT:

I updated the scripts with a clarifying header

[Larrow 2822]

Just get the bound position relative to the _object in its model space. This will give you the correct position.

 _object modelToWorld _boundVector;

OR

As per Saro you can calculate the rotation.

 [ _boundVector, getDir _object ] call BIS_fnc_rotateVector2D 

 

First would be faster as your dealing with modelSpace (bounds) coordinates already.

[Tankbuster 1747]

I did something similar ages ago. I shoved the objects up against a wall, then faced them towards the centre of the building in script. Most of the time, it looked decent and was pretty quick and cpu cheap.

[o5_ 7]

Thanks everyone for the pointers, especially you @ sarogahtyp. The functions you've given me work. I was afraid the lineIntersectsSurface and vector rotating functions would be heavy but they're surprisingly fast. My next task is to map out the walls of the structure. Again, thanks for the help Gents.