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This command is used to define a transformation as a translation vector.
| trnam | = | name of the transformation. |
| pnam | = | The transformation is defined by specifying two existing points whose |
| relative positions define the translation vector. The 1st point given is taken as | ||
| the `from' point and the 2nd as the `to' point. The points may be identified | ||
| by name or picked using the graphics cursor. | ||
| xyz | = | The transformation is defined by specifying the x, y, z values of a translation |
| vector. These will be interpreted in the `GLOBAL' coordinate system unless | ||
| a coordinate system is active or a coordinate system name is given. | ||
| 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. | ||
| ('LOCAL' can be omitted and just the name of an existing local system can | ||
| be given.) | ||
| csname | = | Name of an existing local coordinate system defined previously using |
| CONSTRUCT COORDSYS. | ||
| depn | = | Control for the translation, either `INDEPEND' or `DEPENDEN'. |
| When a translation is specified as being `INDEPEND' the translation | ||
| vector is converted into the global system, it is unaffected by any | ||
| subsequent changes to parameters or coordinate systems. (This is the default). | ||
| When the current axis system is global or `GLOBAL' is specified in the translation | ||
| definition then `INDEPEND' is enforced. | ||
| `DEPENDEN' specifies that the translation is to be implicitly redefined if the | ||
| coordinate system that the translation refers to is altered in any way. When | ||
| further geometry is defined with the translation the redefined translation will | ||
| be used. | ||
| When a local system is active or a local system name is used then the | ||
| translation is `DEPENDEN' on the local system. | ||
| (See also note 2 below.) |
This command is used to define a translation transformation for use in GEOMETRY SWEEP,GEOMETRY COPY and GEOMETRY MOVE commands.
Notes:
In the context of this command `DEPENDENT' refers to the translation definition itself. If the translation is dependent and uses a local coordinate system then repositioning the points defining the coordinate system will have a corresponding effect on the translation when it is next used. It should not be confused with `DEPENDENT' for GEOMETRY SWEEP and GEOMETRY COPY which creates a relationship between the original `part(s)' and the copy(ies).
Although translations may be defined using cylindrical or spherical coordinate systems it is recommended that only rectangular systems are used.
Examples:
This defines a translation vector, called TR1, of x = 1, y = 2, x = 3.4. It will be defined in the GLOBAL coordinate system.
This defines a translation, equal to the direction vector defined by the relative position of point P23 with respect to point P6. As no name is specified for the transformation a name will be generated automatically.
This defines a translation vector, called TRANS1, of x = 3.2, y = 1.9 and z = 0 in the previously defined coordinate system RECT1 (this overrides the current coordinate system). If the coordinate system RECT1 is modified there will be no change to the geometry created with this command (unless `DEPENDENT' is also specified).
See also the following commands
Femsys Limited