Get a point/vector relative to nested object's location.

[rainerpl]

Hi,

Im looking for a way to place objects relatively to other nested objects. ( objects that have a chain of parents that have been moved, rotated ).
I searched the docs but couldnt find anything that could do what im looking for.

Ive tried position.add / addToRef etc but they dont take object's rotation/parent chain into account.

An example of what id like to do:
  A player turns 90 degrees in x direction. A weapon that is parented to the player, turns another "n" degrees.
  Now, how would i put a bullet at the tip of the weapon. ( without setting its parent = weapon ).
  After the bullet is created, it would move/follow objects in global space/coordinate system.
  
in pseudo code:
bullet = new Bullet();//extends Mesh.
bullet.position = player.weapon.position.clone().translate(BABYLON.Axis.Z, weapon_barrel_length, BABYLON.Space.LOCAL);

Note: position object doesn't have translate function, only mesh. 

My actual case is a bit different but this example explains it better.

 

[GameMonetize]

Hello

For every mesh, you can get mesh.getWorldMatrix().

From this world matrix, just call matrix.getTranslation(0 and you're good to go

[rainerpl]

Great, ill give it a try soon and see how it works.

I was looking at the source code for:
locallyTranslate=function(t){this.computeWorldMatrix(!0),this.position=e.Vector3.TransformCoordinates(t,this._localWorld)},

Looks like it does something similar, but yeah, i didnt know what "e" is was in the code, and whats the thing with ( !0 ) in compute matrix call.

[rainerpl]

4 hours ago, Deltakosh said:

Hello

For every mesh, you can get mesh.getWorldMatrix().

From this world matrix, just call matrix.getTranslation(0 and you're good to go

I tried the matrix.getTranslation, but it returns exactly the same object that i can get using 
mesh.getWorldMatrix().getTranslation() seems to be same as mesh.position

Im not sure how i can use it to get a point relative to the mesh.
All changes to mesh.position are done in global space, not local.

I could probably do something like this to get the point, but its a hack and id rather use a nicer solution.

mesh.translate(BABYLON.Axis.Z, 2, BABYLON.Space.LOCAL);
var relative_point = mesh.position.clone();
//move mesh back to undo the translation.
mesh.translate(BABYLON.Axis.Z, -2, BABYLON.Space.LOCAL);

 

/* Quick Update - I found a solution that works in my case. Below is what i used for future readers. */
relative_pos = player.calcMovePOV(0, 0, 10);
world_matrix = player.getWorldMatrix();
world_translation = world_matrix.getTranslation();

world_obj.position = world_translation.add(relative_pos);