Next: GEOMETRY POINT INTERSECT pnam shnm1 [shnm2] Up: GEOMETRY POINT Control Previous: GEOMETRY POINT AT-NODE [pnam] node
Next: GEOMETRY POINT INTERSECT pnam shnm1 [shnm2]
Up: GEOMETRY POINT Control
Previous: GEOMETRY POINT AT-NODE [pnam] node
This command is used to explicitly define the coordinates of a point .
| pnam | = | name of new point, used at later references to the point, for example |
| when a line is defined. | ||
| = | name of existing point to be moved. | |
| = | /PICK and a cursor hit to select an existing point to be moved. | |
| coor | = | x, y and z-coordinates of the point. Each component of the coordinate |
| may be specified as a parameter name. The coordinate component | ||
| will then be dependent on the value of the parameter. | ||
| = | /CURSOR and a cursor hit to define the coordinates. | |
| refcs | = | Reference axis type for interpretation of the coordinates, either |
| `GLOBAL' or `LOCAL'. This will override the currently active system. | ||
| If `LOCAL' is specified then the name of an existing local coordinate | ||
| system must be given. (Although just the name of the existing local | ||
| system can be given.) | ||
| csname | = | Name of an existing local coordinate system as defined using |
| CONSTRUCT COORDSYS. | ||
| depn | = | Dependency control, either `DEPENDEN' or `INDEPEND'. The default |
| is INDEPENDENT unless a local system name is given, parameters are | ||
| used or DEPENDENT is specified. When a point is specified as being | ||
| `INDEPEND' the location of the point is converted into the global | ||
| system, it is unaffected by any subsequent changes to parameters or axes | ||
| systems. |
If the point name is omitted, a new name will be automatically generated. When a sequence of coordinates are being entered, a ',' can be used to repeat a component from the last entered coordinate.
If axis type or local axis name is not specified then the coordinates are interpreted in the current coordinate system as set by the command CONSTRUCT COORDSYS.
When using the cursor to generate points, the x and y coordinates are determined from the screen. The use of the CONSTRUCT SPACE CURS-SHPE command enables the z coordinate to be projected onto a previously defined shape. Shapes may be defined using the command CONSTRUCT SHAPE.
Return Level: GEOMETRY POINT
Notes:
If points are defined to be dependent on a local axis system then moving the local axis system will move all the dependent points. It also possible to build up a hierarchy of local coordinate systems.
Examples:
Defines a point named P1 at x = 0, y = 0, z = 0
Defines a point named P2 at a position defined using the cursor.
Defines a point named CENT at x = 1.5, y = 0, z = 6.25
Defines a point named PNEW at x = 1.5, y = parameter PC1, z = parameter PC2
Defines a point (named automatically) at x = 12.3456, y = 3.5
Defines the points :
P1 at x = 0, y = 0, z = 0
P2 at x = 0, y = 1, z = 0
P3 at x = 1, y = 1, z = 0
P4 at x = 1, y = 0, z = 0
Defines a point (named automatically) at r = 1.5, theta = 22.5, z = 5.66 relative to the local cylindrical coordinate system CYLIND1 regardless of the current active coordinate system. The point that is created will be DEPENDENT on system CYLIND1
See also the following commands
'CONSTRUCT PARAMETER'
'LABEL GEOMETRY POINTS'
'UTILITY DELETE POINTS'
'UTILITY TABULATE GEOMETRY POINTS'
'VIEW GEOMETRY'
Femsys Limited