solved position, ratation and scaling and getBoundingInfo

[Thema]

Hello,

I cannot figure out how the get an updated Bounding Box after the rotation, position or scaling of a mesh.

Here the playground:

https://www.babylonjs-playground.com/#5HP8KU#1

 

Thanks in advance for the help

[jerome]

force the mesh WM computation before the rendering (line 30) then use minimumWorld and maximumWorld instead : https://www.babylonjs-playground.com/#5HP8KU#2

[Thema]

Thanks, it works perfect.

[Thema]

Hello,
I reopened the topic, the getBoundingInfo is not working when the rotation in degrees is not a divisor of 180.

Example: 8 degrees is not a divisor of 180, 180 / 8 = 22.5

https://www.babylonjs-playground.com/#5HP8KU#3

 

 

[jerome]

Actually, I guess the maximumWorld, minimumWorld are the values of Axis Aligned Bounding Box vertices (meaning the World Axis).

[jerome]

mmmh... I suppose my answer is probably not enough as I can imagine you will wonder then how to set the spheres to rotated BBox positions, won't you ?

https://www.babylonjs-playground.com/#5HP8KU#4

Just apply the same transformation than the mesh to its BBox

[Thema]

There is no more need of computeWorldMatrix?

[jerome]

nope

computeWorldMatrix was necessary because we had to update the WM that is used to update the maxWorld and winWorld of the BBox before the rendering (maxWorld and minWorld are automatically updated only at rendering time, not before when you needed them)

Now we don't use maxWorld but max/min instead, everything can be computed at the same step at the rendering time.