[REL] Server-Side getGroundPosition

[kashtesov]

Hi everyone! Release small, but maybe useful resource for servers with default map without any mapping.

This resource allows for you use getGroundPosition (without Z axis) on server-side.

How it works?
All map heights wrotten to file, and resource just read it for get Z position. Not 100% accuracy, but anyway it works. 

What bugs you can detect with this resource?
1. Float positions will be always rounded to nearby integer.
2. If you remove world models, script dont know about that and will return position on removed object.
3. If you add new objects to map, script dont know about that and will return position on world object.

How use that?

exports.ground:getGroundPosition(x, y)

Where it can be used?
1. Random airdrops?
2. Unbug script with random position nearby player?
3. Random forest generation on server-side?

Future plans
1. Add method for check water in position.
2. Add method for get material in position.
3. Add method for get object info in position (world/custom, id)
4. Release script for capture map heights.

Little demo

Spoiler

 

Download link
https://drive.google.com/open?id=1JCYiKPRcv7a6Cw4g2MZgbsVEk3G6H_t8

 

Edited January 8, 2020 by SalwadoR

[IIYAMA]

11 minutes ago, SalwadoR said:

How it works?
All map heights wrotten to file, and resource just read it for get Z position. Not 100% accuracy, but anyway it works. 

Hmm interesting. Good job!

Not so long ago I did the same. Scanning the whole GTA san map 2 units x 2 units and saving all points in to a db. All though my file was a lot bigger, containing not just the x, y, z.

Edited January 8, 2020 by IIYAMA

[kashtesov]

Just now, IIYAMA said:

Hmm interesting.

Not so long ago I did the same. Scanning the whole GTA san map 2 units x 2 units and saving all points in to a db. All though my file was a lot bigger, containing not just the x, y, z.

Here scanning 1x1 units, and in my way dont need save X,Y positions.

[IIYAMA]

5 hours ago, SalwadoR said:

Here scanning 1x1 units, and in my way dont need save X,Y positions.

How long did it take for you to complete the process?

[kashtesov]

8 minutes ago, IIYAMA said:

How long did it take for you to complete the process?

6000х6000 ~1 hr
8000x8000 ~1.5hr

CPU FX 6300, 6x3.6 GHz

Edited January 8, 2020 by SalwadoR

[IIYAMA]

6 minutes ago, SalwadoR said:

6000х6000 ~1 hr
8000x8000 ~1.5hr

CPU FX 6300, 6x3.6 GHz

Oh lol, then you ran it on speedy mode.

I wasn't sure if it loaded all collision fast enough so I put it on slowmode and it took ~3 hours to process , including the separated db queries as second process. (6k*6k, 2x2 grid)

I7 3770k - 3,5GHz

 

 

 

 

[kashtesov]

What about more smoothly positions?

local x, y = getElementPosition(getRandomPlayer());

for _i = 1, 300 do 
  local i = _i / 10;
  
  local z = getGroundPosition(x + i, y);		
  createObject(1337, x + i, y, z); 

  local z = getGroundPosition(x - i, y);		
  createObject(1337, x - i, y, z); 

  local z = getGroundPosition(x, y + i);		
  createObject(1337, x, y + i, z); 

  local z = getGroundPosition(x, y - i);		
  createObject(1337, x, y - i, z); 
end