object as clipping element

Hello,

I have a meshed model I would like to take a corner section out of so that I can see inside it. Clipping plane seems to always use an infinity extent for its cut.

Is there a way to create a solid box and clip everything inside the box? I tried Boolean difference but its not coming out clean. Any advice appreciated. Thank you forum!

Replies to This Discussion

Permalink Reply by peter fotiadis on March 5, 2017 at 10:00am

AFAIK there's no "AddCliipingObject" Method exposed in SDK ... thus clipping ops are restricted to planar infinitive clipping.

Anyway get this in case that you want to clip things from "inside" GH (but is this helpful for you? I doubt).

Load R file first for the test.

Attachments:

Clip_planes_V1.3dm, 1.8 MB
Clip_planes_V1.gh, 119 KB

Permalink Reply by peter fotiadis on March 5, 2017 at 10:55am

But ... never say never: is possible to define multiple clip planes ... thus you can "approximate" a bit better your goal.

Note: IF planes are provided and IF they are valid and IF useUserPlanes = true ... then these are used as clipping planes. If not the plane is defined as in V1.

Note: move and flip (new option) work if one plane is defined (i.e. not using the userPlanes List).

See attached

Attachments:

Clip_planes_V1A.gh, 123 KB

Permalink Reply by peter fotiadis on March 5, 2017 at 11:18am

BTW: Preview the 3 test planes to see their "combined" clipping,

Permalink Reply by peter fotiadis on March 6, 2017 at 2:21am

Here's a sequence of images indicating the usage of multiple clip planes (derived from a facet dome and oriented "inwards" ) in a sphere.

Permalink Reply by Mel King on March 7, 2017 at 3:37am

Peter - thank you so much for these interesting examples. I will study them carefully.

Permalink Reply by peter fotiadis on March 7, 2017 at 4:14am

Well ... the customer satisfaction department notified me that there's an issue around with V1A (has to do with setting properly the activeViewport after choosing a view by name: silly me, blame shortage of espresso).

I'll fix things in the V1B update (soon).

But the issue here is that this approach is "OK" or ... not depending on the choice and orientation of the planes .... therefor post your messy mesh in order to mastermind the best way to examine it.

Permalink Reply by peter fotiadis on March 7, 2017 at 11:34am

Whilst waiting for your stuff have in mind that solids in Rhino and GH closed breps (not baked) are not displayed the same (gray is a R object the blue a GH brep). Some OpenGL stuff ?