how to make surface from points x,y,z

Replies to This Discussion

Permalink Reply by Guido R on March 29, 2017 at 5:31pm

Bake the points and use the patch command using rhino.

In Gh it would be easier to turn it into a mesh. See delaunay.

Can be done but can't thing of a fast way.

Permalink Reply by AFArchitect on March 29, 2017 at 5:55pm

I did and it turn into yellowish dots. now what? and what is delaunay?

Permalink Reply by David Rutten on March 30, 2017 at 3:31pm

You can use Patch in Grasshopper. It will fit a Nurbs surface through your points. However because it is a fitting process, the surface will not exactly intersect all your points, and it may have unwanted bulging away from points.

You cannot create a Surface From Points, because that requires your points to be in a rectangular grid. Ie. they need to be ordered in such a way that the first N points all belong to the first row of the grid, the next N points belong to the second row, the next N points all belong to the third row and so on. The order of points within each row also matters.

Delaunay is a meshing (not surfacing) algorithm which triangulates all the points. It might work for your points, it depends on what you are after. For delaunay your points need not be ordered in any way, but they do need to be 'two-and-half-dimensional'. Delaunay cannot handle overhangs.

In short: if you want a smooth surface, use Patch, if you want a mesh which introduces no further detail, use Delaunay.