Topological data scripting: Difference between revisions
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* '''Line''' A straight line in 3D, defined by starting point and and point |
* '''Line''' A straight line in 3D, defined by starting point and and point |
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* '''Circle''' Circle or circle segment defined by a center point and start and end point |
* '''Circle''' Circle or circle segment defined by a center point and start and end point |
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* '''......''' And soon some more ;-) |
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=== Topology === |
=== Topology === |
Revision as of 15:17, 20 June 2008
Introduction
First to use the Part module functionality you have to load the Part module into the intereter:
import Part
Class Diagram
This is an UML overview about the most important classes of the Part module:
Geometry
The Geomtric objects are the Building block of all topological objects:
- Geom Base class of the geometric objects
- Line A straight line in 3D, defined by starting point and and point
- Circle Circle or circle segment defined by a center point and start and end point
- ...... And soon some more ;-)
Topology
The following topological data types are available:
- COMPOUND A group of any type of topological object.
- COMPSOLID A composite solid is a set of solids connected by their faces. It expands the notions of WIRE and SHELL to solids.
- SOLID A part of space limited by shells. It is three dimensional.
- SHELL A set of faces connected by their edges. A shell can be open or closed.
- FACE In 2D it is part of a plane; in 3D it is part of a surface. Its geometry is constrained (trimmed) by contours. It is two dimensional.
- WIRE A set of edges connected by their vertices. It can be an open or closed contour depending on whether the edges are linked or not.
- EDGE A topological element corresponding to a restrained curve. An edge is generally limited by vertices. It has one dimension.
- VERTEX A topological element corresponding to a point. It has zero dimension.
- SHAPE A generic term covering all of the above.
Creating Basic types
You can directly create basic topological objects through the module:
b = Part.createBox(0,0,0,100,100,100)
Part.show(b)
Creating Topology
We will now create a topology by constructing it out of simpler geometry. As a case study we use a Part as seen in the picture which consist of four Vertexes, two circles and two lines.
Load and Save
Exploring shapes
You can explore the topological data structure:
b = Part.createBox(0,0,0,100,100,100)
b.Wires
w = b.Wires[0]
w
w.Wires
w.Vertexes
Part.show(w)
w.Edges
e = w.Edges[0]
e.Vertexes
v = e.Vertexes[0]
v.Point