*trim_by_offset_edges
Offset selected surface edges and trim attached surfaces.
Syntax
*trim_by_offset_edges surfs lines offset break_mode mode break_angle
Type
HyperMesh Tcl Modify Command
Description
Offset selected surface edges and trim attached surfaces.
Inputs
- surfs
- Selection markmask for the set of surfaces to perform the operation. If zero, all surfaces attached to selected lines are trimmed.
- lines
- Selection markmask for the lines to be offset and used for trimming. If 0, all lines on selected surfaces are offset and used for trimming selected surfaces.
- offset
- Offset distance value.
- break_mode
- Controls connection of lines connected on convex vertex (see comments). Used together with break_angle.
- mode
- Bitwise operation mode:
- Bit 0
- Trim mode
- 0 - Trim selected surfaces by offset lines.
- 1 - Do not trim surfaces but create offset lines and put them in the lines selection markmask.
- Bit 1
- Shrink mode
- 0 - Trim surfaces and keep all trimmed pieces
- 1 - Trim surfaces and remove parts between original and offset lines
- break_angle
- Angle value to control extension of offset edges. Setting to 0.0 corresponds to default value of 30 degrees. See comments.
Example
To create a "generic washer" of width 5, select lines on the free loop
(lines=1) and
call:
*trim_by_offset_edges (0,1, 5.0, 0, 0, 0.0)
To "shrink" surfaces (selected in the surface mark surfs = 1)
*trim_by_offset_edges (1,0, 5.0, 0, 2, 0.0)For break_angle and break_mode, normal offset of lines connected at convex vertex creates a break between line ends. In order to maintain connectivity between lines, the ends must be connected. If the vertex angle is larger than break_angle, connect ends by extending and intersecting them. If the angle is smaller than break_angle, connect ends either by a straight line (break_mode = 0) or by a circular arc (break_mode = 1).
Errors
None.