pyg4ometry.pycgal.core¶

Classes¶

`CSG`
`PolygonProcessing`
`PolyhedronProcessing`

Functions¶

`do_intersect`(csg1, csg2)
`intersecting_meshes`(csgList)

Module Contents¶

class pyg4ometry.pycgal.core.CSG¶

sm¶

classmethod fromPolygons(polygons, **kwargs)¶

toVerticesAndPolygons()¶

clone()¶

rotate(axisIn, angleDeg)¶

translate(disp)¶

scale(*args)¶

getNumberVertices()¶

getNumberPolys()¶

vertexCount()¶

polygonCount()¶

intersect(csg2)¶

union(csg2)¶

subtract(csg2)¶

inverse()¶

coplanarIntersection(csg)¶: Compute the coplanar surfaces between self and csg

classmethod cube(center=[0, 0, 0], radius=[1, 1, 1])¶

Construct an axis-aligned solid cuboid. Optional parameters are center and radius, which default to [0, 0, 0] and [1, 1, 1]. The radius can be specified using a single number or a list of three numbers, one for each axis.

Example code:

cube = CSG.cube(
  center=[0, 0, 0],
  radius=1
)

volume()¶

area()¶

minEdgeLength()¶

maxEdgeLength()¶

isNull()¶

isClosed()¶

isTriangleMesh()¶

isOutwardOriented()¶

doesSelfIntersect()¶

info()¶

loadOff(fileName)¶

writeOff(fileName)¶

pyg4ometry.pycgal.core.do_intersect(csg1, csg2)¶

pyg4ometry.pycgal.core.intersecting_meshes(csgList)¶

class pyg4ometry.pycgal.core.PolygonProcessing¶

classmethod windingNumber(pgon)¶: return the winding number of pgon :param pgon: list of points [[x1,y1], [x2,y2], … ] :type pgon: List[List[x1,y1], …] returns: Integer winding number

classmethod reversePolygon(pgon)¶: return reversed polygon :param pgon: list of points [[x1,y1], [x2,y2], … ] :type pgon: List[List[x1,y1], …] returns: List[List[x1,y1], …]

classmethod makePolygonFromList(pgon, type='')¶

Convert list of points [[x1,y1], [x2,y2], … ] to cgal Polygon_2

Parameters:

pgon (List[List[x,y], ..]) – list of points [[x1,y1], [x2,y2], … ]
type – Class of polygon (Polygon_2_EPICK, Polygon_2_EPECK, Partition_traits_2_Polygon_2_EPECK)
type – str

returns: Polygon_2

classmethod makeListFromPolygon(pgon)¶

Convert 2D polygon to list of points [[x1,y1], [x2,y2], … ]

Parameters:: pgon (Polygon_2_EPECK or Polygon_2_EPICK) – cgal Polygon_2 input

returns: [[x1,y1], [x2,y2], …]

classmethod decomposePolygon2d(pgon)¶

Decompose general 2D polygon (pgon) to convex 2D polygons

Parameters:: pgon (List(List[2])) – list of pgon points (which are lists) [[x1,y1], [x2,y2], …]

returns: List of polgons [pgon1, pgon2, …]

classmethod decomposePolygon2dWithHoles(pgonOuter, pgonHoles)¶

Decompose general 2D polygon with holes (pgon) to convex 2D polygons

Parameters:

pgonOuter – list of pgon points (which are lists) [[x1,y1], [x2,y2], …]
pgonHoles – List of polgons [pgon1, pgon2, …]

returns: List of polgons [pgon1, pgon2, …]

classmethod triangulatePolygon2d(pgon)¶

Triangulate general 2D polygon

Parameters:: pgonOuter – list of pgon points (which are lists) [[x1,y1], [x2,y2], …]

returns: List of triangles [ [[x1,y1], [x2,y2], [x3,y3]], [[x1,y1], [x2,y2], [x3,y3]], …]

class pyg4ometry.pycgal.core.PolyhedronProcessing¶

classmethod surfaceMesh_to_Polyhedron(sm)¶

classmethod nefPolyhedron_to_convexPolyhedra(np)¶

classmethod polyhedron_to_numpyArrayPlanes(p)¶