mop2PointCurve.py

#python
import lx
import lxifc

SERVER_NAME= "mop.2PointCurve"

class pointVisitor(lxifc.Visitor):
    def __init__(self, pointObj, markMode):
        self.pointObj = pointObj
        self.values = []
        self.count = 0
        self.markMode = markMode

    def vis_Evaluate(self):
        if self.pointObj.TestMarks(self.markMode):
            self.values.append(self.pointObj.ID())
            self.count += 1

class MeshOp(lxifc.MeshOperation):

    def mop_Evaluate(self, mesh, type, mode):
        mesh = lx.object.Mesh(mesh)
        if mesh.test() == False:
            return

        polygon = lx.object.Polygon(mesh.PolygonAccessor())
        if polygon.test() == False:
            return

        point = lx.object.Point(mesh.PointAccessor())
        if point.test() == False:
            return

        visitorInstance = pointVisitor(point, mode)
        point.Enumerate(mode, visitorInstance, 0)

        nPoints = visitorInstance.count
        points = visitorInstance.values

        nPoints = nPoints if nPoints % 2 == 0 else nPoints - 1

        points_storage = lx.object.storage()
        points_storage.setType('p')
        points_storage.setSize(2)

        for i in xrange(nPoints/2):
            points_storage.set((points[i*2],points[i*2+1]))
            polygon.New(lx.symbol.iPTYP_CURVE, points_storage, 2, 0)

        mesh.SetMeshEdits(lx.symbol.f_MESHEDIT_GEOMETRY)

tags = {lx.symbol.sMESHOP_PMODEL : "."}
lx.bless(MeshOp, SERVER_NAME, tags)