doc:user:geometry:user:points

### Table of Contents

# Points

## Definition

Geometrical `Points`

(e.g. vertices) are created thanks to an object called `PointSet`

of the `Geometry`

using the member function `define()`

. Once created, they are stored in the `PointSet`

.
`Points`

are the geometrical entities of the lowest level. They are used to define later Curves.

pt = pointset.define(number, x, y [, z])

with

`number` | user number (unique among Points and $\ge 1$) |

`x` , `y` , `z` | coordinates of this point ($z=0$ by default) |

## Example

Definition of the 4 vertices of a square of length $L=5$. The python variable $L$ is used here to parametrize the positions of the points.

L=5 pointset = geometry.getPointset() p1 = pointset.define(1, 0, 0) p2 = pointset.define(2, L, 0) p3 = pointset.define(3, L, L) p4 = pointset.define(4, 0, L)

The following command prints the created points as a list:

print pointset

which produces the following output:

PointSet of size 4 (hash=off) Point #1 nDB=[1] (pos in DB) p=[0 0 0] Point #2 nDB=[2] (pos in DB) p=[5 0 0] Point #3 nDB=[3] (pos in DB) p=[5 5 0] Point #4 nDB=[4] (pos in DB) p=[0 5 0]

## Note

doc/user/geometry/user/points.txt · Last modified: 2016/03/30 15:23 by 127.0.0.1