Behavior of objects different in playground

[Butterwell]

When I run this code locally, it's fine, the generated spheres "stay put". On the playground, the generated spheres move with the target (which is the parent of the camera).

 

http://www.babylonjs-playground.com/#RZ2XP#4

 

Press "C" to generate spheres. Use arrow keys to change movement direction.

 

If I were to guess, this is a difference in what happens with this code:

 

var local_position = new BABYLON.Vector3(0, 0, 0)

local_position.z += 40

        

// Local to World Transformation 

var to_world_transform = target.getWorldMatrix()

 

var place_at = BABYLON.Vector3.TransformCoordinates(local_position, to_world_transform);

 

 

(As a side note, how does one get the BABYLON version string?)

 

[GameMonetize]

Hello and welcome

 

I'm sorry but I do not get the problem can you elaborate a bit more? I see a red box moving to me and static spheres for now.

 

One note: the playground already provides an engine and a renderloop. So I cleanup a bit your playground for further investigations:

 

alert(BABYLON.Engine.Version);

 

 

For version display: 

alert(BABYLON.Engine.Version);

[Butterwell]

Thank you, glad to be here.

 

Sure. The cube is static at 0, 0, 0 global. The spheres "should be" static, I think. When served from my local machine (and when running from file://) the spheres are static. The camera is moving in conjunction with it's parent, "target". The sphere appears static because it's moving at the same clip as the target on the playground.

 

You'll if you turn a bit to the left or right (arrow keys) and continue to generate spheres © you'll notice that each new sphere is generated a bit further away. (Again, on my local machine, they get generated right in front of the camera)

 

My code might not be best practice for adding an object right in front a moving target/camera, and any pointers about how to do that another way are appreciated.

 

(I thought it might be a version difference, but both the playground and locally I'm running v2.3.0-alpha)

[Butterwell]

Notice, also, that the rendering position of the spheres (all uniform size) seems to be different from the camera clipping (terminology?) position of the spheres: they get no bigger yet disappear from view after a while.

[Butterwell]

Here's a version with no human interaction needed.

 

http://www.babylonjs-playground.com/#RZ2XP#6

[Butterwell]

And move everything into createScene, and...

 

Tada!  It works.

 

http://www.babylonjs-playground.com/#RZ2XP#7

 

Compare #6 and #7

 

The essential difference is that everything is in createScene. Gotta love scoping.

[GameMonetize]

lol ! Me too ;D