babylonjs How to swap a mesh and retain position

[vdheeraj]

Hi,

Have render a bike model as show.

Few details regarding the model:

1. Exported model from blender.
2. All parts are under a parent mesh.

I want to swap the existing fuel tank with a new fuel tank.

Loading new mesh(fuel tank) using AssetsManager.

meshTask.onSuccess = function (task) {
           //Get current tank

          //Hide current tank 

          //Get current tank position using getAbsolutePosition()

         //Set position to new tank

         //Set new tank's parent

        //Show new tank
        }

Few details regarding new tank model:

1. Exported model from blender.
2. Has no parent.

But new tank is not in correct position.

I can update the position manually(hard code) and get the following result.(Don't want to do this)

Need to swap current mesh with new mesh and retain the position.

 

[Wingnut]

On 4/22/2017 at 6:43 AM, vdheeraj said:

         //Set position to new tank

         //Set new tank's parent

Hi @vdheeraj, welcome to the forum.  Nice model/scene... pretty.  You did a well-explained post, too, thx.  Could you try a test for me?

Try reversing the order of those two lines.  Set tank's parent first, then set position gotten from previous tank.  Setting parent AFTER setting position... might accidentally over-ride your position setting. 

Report results, please.  Perhaps this will work.  I hope so, but if not, we'll try more ideas... if I can think of some. 

[Convergence]

Maybe try:

           //Get current tank

          //Hide current tank 

           // compute world matrix on current tank

          //Get current tank position using getAbsolutePosition()

           // set new tanks parent

           // set new tanks position using setAbsolutPosition()

[vdheeraj]

Hi @Wingnut and @Convergence thanks for the suggestions, but didn't resolve the issue.

However @Wingnut, while trying to resolve this, came across this post.

I'm doing something similar as mention in the post.

So instead of having 2 files (original bike and modified tank), combined both and layered them in blender and exported.(All meshes have single parent)

Load all the meshes upfront and toggle isVisible and setEnabled to show and hide mesh.

Was able to achieve this.

Thanks @Wingnut, To quote you "you're just the coolest" .

And @Convergence, appreciate your help.