Applying the Extrude Operation

When using the operation Extrude, you must first create the geometry to which the extrusion is to be applied. You can create any of the sheet primitive shapes listed in Creating Primitives. Once the geometry is created, you can define and apply the operation Extrude to it.

In the following example, the function ongenerate() is used to create a polygon sheet body and perform the operation Extrude.

def Ongenerate(feature,function):
    length = 0.3
    bodies = []

    builder = ExtAPI.DataModel.GeometryBuilder
    polygon=builder.Primitives.Sheet.CreatePolygon([0.,0.,3*length,0.,0.,2.*length,length,0.,2.*length])
    polygon_generated = polygon.Generate()
    extrude = builder.Operations.CreateExtrudeOperation([0.,1.,0.],length/2.)
    bodies.Add(extrude.ApplyTo(polygon_generated)[0])

    feature.Bodies = bodies
    feature.MaterialType = MaterialTypeEnum.Add

    return True

In this example:

  • The first part of the function creates a polygon sheet body using a process similar to the one used to create a cylinder in Creating a Sheet Body.

  • With the operation Extrude, you use the operations generator builder.Operations.CreateExtrudeOperation. The method CreateExtrudeOperation specifies that the operation is defined by the following arguments:

    • Vector coordinates, which defines the direction of the extrusion

    • Length of the extrusion

      Note:  While the variable Length is used for both the sheet body and the extrusion definition in this example, you could have used a different variable for each.

  • The method ApplyTo specifies the geometry to which to apply the operation Extrude. The method ApplyTo() returns a list of bodies to which to apply the operation.

  • With the lines bodies.Add(extrude.ApplyTo(polygon_generated)[0]) and feature.Bodies = bodies, you add the extruded sheet body polygon to the list feature.bodies so that it is added to DesignModeler after generation. Bodies not added to this list are not retained.