solved How to set a selected area as the frustum plane

[fdeng]

Hi everyone,

I need to select an area in the scene, and then enlarge it as frustum plane.

 

Select an area by mouse:

 

Enlarge the selected area as frustum plane:

 

It seems babylon can not set a frustum plane directly, any idea to implement it?

[NasimiAsl]

hi @fdeng

https://www.babylonjs-playground.com/#9FD1KJ#78

i made this for ArcRotateCamera

but some bug i have 

1. i make select on div top of canvas 

2. that close object use by scale arcrotatecamera radius parameter

3. just one direction   selected

** use click ight for back

** after any change you most reload full html and see correct result

https://www.babylonjs-playground.com/#9FD1KJ#82

 

 

[NasimiAsl]

https://www.babylonjs-playground.com/#9FD1KJ#92

https://www.babylonjs-playground.com/frame#9FD1KJ#94

 

[Guest]

Perhaps you need a clipping plane instead?

http://doc.babylonjs.com/how_to/clip_planes

[fdeng]

@Deltakosh

I don't want to chip anything, I just want to select a rectangle area, and then scale up it to fill the render canvas size.

 

@NasimiAsl

Thanks for your PG demo,  it can zoom in the selected area, but the scale is a little different than what I want.

Your method is also a good choice if I can't find a better way to implement it 

[NasimiAsl]

var scalep = Math.max( dv.offsetWidth/ canv.offsetWidth ,dv.offsetHeight/ canv.offsetHeight );

 

look to line 41 you can manage your scale by this wish that help