Mesh quads and normals with Python?

Scripting
1

Hi…,

I want to get all mesh quads with their vertices and their quad normal in Python.

I don’t see, which methods to use:
https://developer.rhino3d.com/api/RhinoScriptSyntax/#mesh

Can someone help?

Thanks

Michael
www.flexiCAD.com

2

Hi…,

sorry, I’ve found everything myself, it looks like this:

obj = rs.GetObject("Select mesh", rs.filter.mesh)
faceVerts = rs.MeshFaceVertices( obj )
normals = rs.MeshFaceNormals( obj )
verts = rs.MeshFaces( obj, True)

if faceVerts and normals and verts:
    for count, face in enumerate( faceVerts ):
        firstVertex = count * 4
        if face[2] == face[3]:
            print " tri v0: ", verts[ firstVertex ], "v1: ", verts[ firstVertex + 1 ], "v2: ", verts[ firstVertex + 2 ], " normal: ", normals[ count ]
        else:
            print "quad v0: ", verts[ firstVertex ], "v1: ", verts[ firstVertex + 1 ], "v2: ", verts[ firstVertex + 2 ], "v3: ", verts[ firstVertex + 3 ], " normal: ", normals[ count ]

Thanks

Michael

1 Like
3

image
image1333×750 415 KB 

import rhinoscriptsyntax as rs
import ghpythonlib.treehelpers as th

vertices = rs.MeshVertices(mesh)
face_vertices = rs.MeshFaceVertices(mesh)
v = []
for i in range(rs.MeshFaceCount(mesh)):
    temp = []
    for j in face_vertices[i]:
        temp.append(vertices[j])
    v.append(temp)

v = th.list_to_tree(v)
n = rs.MeshFaceNormals(mesh)
c = rs.MeshFaceCenters(mesh)

deMesh.gh (19.6 KB)

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