Clip/Cutout objects by geometry

web wrote:

Does someone know if it is possible to clip geometry by certain objects/materials?

FUNNY you should ask…
This has been a long standing venture of mine (and many others) here.

Some advanced product configurators might require in-depth views of product details. Ie: cross sections of machinery, 3d printed objects, architecture etc…

This is where “clipping planes” comes in.

Here’s a code example of the clipping planes feature using “stencil”.

I don’t know if your needs are immediate for advanced use of this example or not,

but after many arduous weeks of learning about this with help from others, I’ve been able to work out a verge 3d compatible setup for clipping planes which allows for custom object loading to be clipped.

That is not ready to share just yet, but I will as soon as it is.

The object in the linked example is generated from its code there.

Check out this codepen Ivan helped me with to refine the process of having your own object loaded…
Mind you this one is using the THREE.js library, as its original codepen was as such.
I’ve since translated a project based on this to v3d.

may be it is possible to sort your objects in groups so that you can hide them in bulk?

I’m trying to find this solution I came across while researching clipping planes that uses material properties for exactly what you’re describing.

I’ll post when I find it.
It’s very interesting.

here are some links to where user prisoner849 was sharing his technique…
first one – In the Orb (Shaders)

more advanced with particles –
Clipping Solids (SDF functions)

i guess the trick is you describe within the material, the actual bounding box that either hides or shows the material.
link to that post.

check out what users were doing..
cool holographic city graphic

heart wave clipping graphic

these are extreme uses of it (some I’d definitely find useful for my GUI etc) but the concept might be able to be used to do the transparent trick you’re looking for.

EDIT:
Also here is some talk on a different method using a post processing mask pass (which I assume you use an alpha pass from the transparent object)

Glad I found out about that one. Been looking for a way to mask blurring to the corners of the screen for a cinematic vignette effect.

web wrote:

Great, thank you. Will have a look at that.

Any progress in that direction?
I’m curious, as I’m thinking of it’s usefulness in certain future compositing scenarios and haven’t messed with it.
“It” being the technique I’ve posted about here.

We have just introduced the clipping planes feature: https://www.soft8soft.com/topic/verge3d-3-7-pre5-available/#post-40451