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Previous: GEOMETRY LINE PARALLEL [new_l] old_l dirn
This command will make a new line that is perpendicular to an existing line. It only works with straight lines.
| new_l | = | name of the line to be created. |
| old_l | = | name of an existing line. |
| start_p | = | name of an existing point that the new line will start from. It does not have to |
| be one of the points defining `old_l'. | ||
| dirn | = | Direction for the perpendicular line, defined using either a guide point or by |
| specifying a general plane. When a guide point is given the new line is created | ||
| perpendicular to the old line and in the plane containing the guide point and the | ||
| old line. If, however, XY, YZ or ZX is used for `direction' then the new line | ||
| will lie in a plane parallel to the specified plane in either the current coordinate | ||
| system or the coordinate system specified by `csname'. | ||
| length | = | The length of the new line. If `dirn' above has been specified using a named |
| plane, the length is the perpendicular distance in that plane. Otherwise if | ||
| the direction has been specified using a guide point, the distance is the perpendicular | ||
| distance from the old line towards the guide point. Finally, if a guide point | ||
| is used but no distance is given then the length is the perpendicular distance | ||
| from the old line to the guide point. | ||
| refcs | = | Reference coordinate system (either GLOBAL or LOCAL) for interpretation |
| of the direction specified above. If specified this will override the currently | ||
| active coordinate system. If `LOCAL' is specified then the name of an existing | ||
| local coordinate system must be given. | ||
| csname | = | name of an existing local coordinate system previously defined using |
| `CONSTRUCT COORDSYS'. It can only be a rectangular coordinate system. | ||
| div | = | the number of divisions to be created along the line. The default is set |
| with MESHING DIVISIONS DEFAULT; the initial value is 4. |
If a coordinate system direction is specified then this will be interpreted in the currently active coordinate system unless the user gives `GLOBAL' or `LOCAL' with an existing coordinate system name. Local coordinate systems can be defined using the command CONSTRUCT COORDSYS.
Examples:
Will create a line (named automatically) perpendicular to line L10, starting at P45 in a direction towards point P10. The length of the line will be 23.
Will create a new line called LPERP23 perpendicular to L23, starting at P35, the new line will be 1.293 units long and be in a XY parallel to the current coordinate system.
Will create a line perpendicular to L11 starting at P43. The new line will line in a plane parallel to the ZX plane of the coordinate system RECT11; the line will be 3.95 units long and have five divisions.
Femsys Limited