Talk:Catmull-Clark subdivision surface

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>> The new mesh will consist only of quadrilaterals, which won't in general be flat.

Could someone clarify this?

Does this sentence mean:

"The new mesh will consist only of quadrilaterals. Each quadrilateral won't in general be flat."

or

"The new mesh will consist only of quadrilaterals. The mesh won't in general be flat."

It means that the quadrilateral won't in general be flat. --Fredrik Orderud 20:40, 4 September 2007 (UTC)

isn't the image wrong? A cube shouldn't become a sphere with catmull-clark! —Preceding unsigned comment added by 85.225.115.25 (talk) 19:15, 30 December 2007 (UTC)

No, Cubes do indeed become spheres when subdivided using Catmull-Clark. Perhaps you're thinking of regular subdivision or are expecting some form of chamfered cube. 71.171.252.81 (talk) 06:25, 6 February 2008 (UTC)

>> and take the average R of all n edge midpoints for edges touching P, where each edge midpoint is the average of its two endpoint vertices

Can someone clarify this? Does this mean the endpoint vertices from the original edge or the new edge? Broodle (talk) 02:47, 28 April 2008 (UTC)