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Re: An object graphics problem [message #36211 is a reply to message #36023]

Mon, 11 August 2003 11:27

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

"Karl Schultz" wrote in message...
>
> "Gethyn Lewis" wrote in message...

>> Now I want to cut the sphere with a plane that is perpendicular
>> to the vector and goes through the spheres centre and then
>> be able to look down the vector and see the data around the
>> edge of the newly cut sphere. Any ideas?
>
> You may want to take a look at the CLIP_PLANES property.
> It will be very easy to position a clipping plane at your
> origin and orient it as you describe. You can use this
> plane to clip the "front" half of the spheres and then you'll
> see the concentric half-spheres nested behind the clip plane.
> This might give you what you want if you want filled rings or
> bands. If you want really narrow rings, then maybe a second
> clip plane located a bit behind the front plane that clips
> almost the entire back half of the spheres might work.

If you are not going to be changing your clipping plane regularly you can
also use MESH_CLIP() on your spheres in a manner similar to Karl's
CLIP_PLANES method.

It will be a bit of a toss up. The MESH_CLIP approach will take a bit
longer to build the objects to display but will probably draw faster than
the CLIP_PLANES method. If you are going to be changing your clipping plane
while you interact with the objects then the CLIP_PLANES method would be
better since you wouldn't need to manage the vertex and connectivity data at
all.

-Rick

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[Message index]

		An object graphics problem By: grl on Mon, 11 August 2003 03:53
		Re: An object graphics problem By: Dick Jackson on Wed, 13 August 2003 09:24
		Re: An object graphics problem By: grl on Wed, 13 August 2003 04:52
		Re: An object graphics problem By: Karl Schultz on Mon, 11 August 2003 12:50
		Re: An object graphics problem By: Rick Towler on Mon, 11 August 2003 11:27
		Re: An object graphics problem By: Karl Schultz on Mon, 11 August 2003 10:49

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