LOD and camera.parent

[eboo]

hi,

i use a camera with parent

parent is the caracter.

i'd like to use LOD instead of a self drawn mesh unloader and reunloader.

i'd like to use LOD with distance to parent.camera

here is a sample: http://www.babylonjs-playground.com/#1DZUBR#18

i'd like to set "test" distance from parent (firebox here).

 

Question 1: is it possible?

Question 2: my script (more complexe) look like it's taking LOD "origine" on (0,0,0). but i don't know why not player, not camera. how can it be possible?

Max "shown" Value used is distance from camera to parent. (this is ok)

But boxes are "shown or hidden" with distance from (0,0,0) to the box.

 

x x x

0,0,0x x x <- shown       far away ->                       camera x  <-used distance ->   x target

x x x

sorry for my english skill

 

 

 

[GameMonetize]

Hey!! well done! you found a nasty bug

 

I fixed it it should be good now

[Wingnut]

Hi guys.

http://www.babylonjs-playground.com/#1DZUBR#22

Big boxes, to little boxes, to big planes, to little planes, to out-of-sight.  Working good.

I thought there was still an issue, but it was an issue with ME.    Thanks for the bug-find/fix, guys!  Well done.

[eboo]

thanks, it's working as expected

 

but

is it possible to use/modify/hack LOD system?

actual system use distance between camera and knot00

my target is to use this with a "distance" similar to:

var distance = (fountain.position.subtract(knot00.position)).length();

 

in my exemple, result would be boxes around the firebox and no element on corner.

No matter how far is the camera

 

 

 

 

 

[GameMonetize]

This is not directly supported but you can try to hack this line:

https://github.com/BabylonJS/Babylon.js/blob/master/src/Mesh/babylon.mesh.ts#L234

[Wingnut]

Hacking is FUN!  That's where the mad scientists hang-out. 

(heretofore... firebox == spacecraft) 

Eboo needs LOD... with distance... based-upon a user-settable (and possibly constantly-repositioning) origin.  Cooooooool.  We need this... for from-within-spacecraft views.  LOD would then be based-upon distance of LOD mesh... from/to spacecraft mesh.  And then we completely ignore issues with the followCam.  Wow. 

So, eboo... (love the animated forum pic, btw)... needs to cross-offset the distance of followCam-to-spacecraft... and use THAT result ... in the computing of the LOD.  err... something like that.

hmm.  This is a fun thing.  This might lead to some framework feature-adding... yum!

[eboo]

that's it

            var distanceToCamera = (boundingSphere ? boundingSphere : this.getBoundingInfo().boundingSphere).centerWorld.subtract(camera.globalPosition).length();

in my case should be something like

 

if(!!camera.parent)

           var distanceToCamera = (boundingSphere ? boundingSphere : this.getBoundingInfo().boundingSphere).centerWorld.subtract(camera.parent.globalPosition).length();

else

            var distanceToCamera = (boundingSphere ? boundingSphere : this.getBoundingInfo().boundingSphere).centerWorld.subtract(camera.globalPosition).length();