Creating meshes from scratch

Scripting
1

Hi all,
I am a python user(beginner) trying to understand meshes and meshing algorithms like Marching cubes, Ball Pivot and Marching tetrahedra. I saw basic example provided with rhinoscriptsyntax, It was hard to imagine how hard it was to make mesh faces assigned from points. One way i could think of not Reinventing the wheel was to call mesh from points commands in python . I needs some direction to head towards creating meshes in rhino
I was suggested Libraries but i not smart enough to figure out how to or where to use them exactly.

2

If you are not familiar with polygon meshes, this can help you get started.

Using Rhino.Python and the rhinoscriptsyntax, you can create a simple mesh like this:

import rhinoscriptsyntax as rs

vertices = []
vertices.append((0.0,0.0,0.0))
vertices.append((5.0, 0.0, 0.0))
vertices.append((10.0, 0.0, 0.0))
vertices.append((0.0, 5.0, 0.0))
vertices.append((5.0, 5.0, 0.0))
vertices.append((10.0, 5.0, 0.0))
vertices.append((0.0, 10.0, 0.0))
vertices.append((5.0, 10.0, 0.0))
vertices.append((10.0, 10.0, 0.0))

faceVertices = []
faceVertices.append((0,1,4,4))
faceVertices.append((2,4,1,1))
faceVertices.append((0,4,3,3))
faceVertices.append((2,5,4,4))
faceVertices.append((3,4,6,6))
faceVertices.append((5,8,4,4))
faceVertices.append((6,4,7,7))
faceVertices.append((8,7,4,4))

rs.AddMesh( vertices, faceVertices )

The rhinoscriptsyntax AddMesh function just call into RhinoCommon and creates a Rhino.Geometry.Mesh object.

http://4.rhino3d.com/5/rhinocommon/?topic=html/T_Rhino_Geometry_Mesh.htm

Does this help?

1 Like
3

Thanks Dale ,
I saw the mesh example but its very hard in case if its a random point cloud.