Extruding shapes along Y axis.

[Treant]

Hi, I'm new to babylon JS, sorry for silly questions.
I follow this tutorial http://doc.babylonjs.com/tutorials/Parametric_Shapes and when i'm extruding my 2D shape along Z axis it looks just fine: http://www.babylonjs-playground.com/#RF9W9#387

When I do it along Y axis (with changed path) result becomes flat:
http://www.babylonjs-playground.com/#RF9W9#389

How do I create correct path?

[JohnK]

Hi @Treant and welcome.  It mig

ht not jump out at you but it is in the documentation that you can only extrude along the z axis

Quote

you only set these points in the xOy plane, so every z coordinate is zero. ..... Let's now imagine you could stretch this 2D shape along the Z-axis to give it some volume... this is extrusion

Well OK you can give a little variation to x and y as you extrude along Z but as set up currently you can only extrude in the general Z direction.

For any other direction you need to extrude along z axis and rotate the finished mesh.

It is possible to use a ribbon to produce an extrusion in any direction but you have to do a little more work.

If you want to play around with extrusions give this a go http://cubees.github.io/factory/extrude/extrude.html you can download the results as a .babylon file.

[Nabroski]

i working on something else, maybe its helpful i leave it here

http://www.babylonjs-playground.com/#DMLWQ#2

minimal version:

http://www.babylonjs-playground.com/#DMLWQ#3

[jerome]

http://www.babylonjs-playground.com/#RF9W9#390

I think there's is a little misunderstanding here.

When using extrusion, you have two steps :

- the shape definition what will be used as a model to be extruded along an axis in the space. This shape is to defined in the xOy plane (actually, you can set some z values if you want). Just consider that this plane is the one that will be slided along the axis, orthogonally to it.

- the path definition what is the curved axis (or linear) the model is extruded along. It can go to any direction in the space.

 

So

# 1 : planar model described in xOy plane whatever the extrusion path then

# 2 : extrusion path whatever the chosen planar model

There's no constraint nor dependancy between #1 and #2

 

[JohnK]

@jerome
 must stop following my expections which were that #1 and #2 were not independent. Now all is clear.