Definition of Point and Lines
- Last UpdatedDec 03, 2025
- 2 minute read
The panel modelling of Planar Hull Modelling allows points and lines to be set in a great number of ways, selecting coordinate system, end points. In defining positions and lines using the Planer > Model > Create function, the same possibilities exist. In addition, there is, in most situations, a choice whether a position should be keyed in or if it should be pointed out with the cross-hair cursor. Depending on the situation the default situation is either "key-in" or "point". In the plate definition it is normally quite satisfactory to select a position in a plate by the cursor. When positioning a hole, pointing by the cursor is not exact enough and, therefore, the default is that key-in is expected.
In all situations where the graphic interactivity can be used, it is possible to switch between the two modes:
-
By an empty return when key-in was expected.
-
By CANCEL when a position is expected.
Both when coordinates are keyed-in and when points are identified in a view, it is possible to use/create references to topology points, see below.
If any position already has been defined, a "cancel" as above will back out the last given value. When all given values have been backed out, the mode switch will take place.
If possible, a keyed-in point or line is displayed.
If several points shall be keyed in, there are several possibilities. Say that the point is defined by X- and Y-coordinates and that they are (1,10) (2,10) and (3,10).
Example 1:
|
X: |
1 |
<ret> |
|
Y: |
10 |
<ret> |
|
X: |
2 |
<ret> |
|
Y: |
10 |
<ret> |
|
X: |
3 |
<ret> |
|
Y: |
10 |
<ret> |
|
X: |
; |
Consequently, the coordinates can be keyed in by pairs.
The end of such a sequence is marked by keying in a semicolon.
Example 2:
|
X: |
1-3 |
<ret> |
|
Y: |
10 |
<ret> |
|
X: |
; |
Example 3:
|
X: |
1,2,3 |
<ret> |
|
Y: |
10 |
<ret> |
|
X: |
; |
The two last examples show that in one return several terms or a repetition term can be keyed in.
Example 4:
|
X: |
1-3 |
<ret> |
|
Y: |
10 |
<ret> |
|
X: |
5 |
<ret> |
|
Y: |
11; |
<ret> |
is an allowed combination and will result in the following part of a statement:
... X = 1-3, 5, Y = 10, 10, 10, 11
Note: A sequence of coordinate pairs must be terminated by a; returned for the first coordinate of the pair or following the last occurrence of the second coordinate.
An empty return acts as a cancel, that means, the last input coordinate pair will be backed out.
FR- and LP-terms can be keyed-in in exactly the same way as explicit coordinates.