The Drawing Cleanup dialog box allows you to
perform many functions that fix common errors, and it removes
unnecessary
data
found in many drawing files. It also converts incompatible data into
useful entities. This
command
offers many filters that audit the drawing file and allows you to
select which options and settings you want to use. A report of the
cleanup results will be displayed upon completion. Always save your
file when the drawing cleanup
routine is complete.
Set UCS to World
Coordinates
This sets the UCS (user coordinate system) to
the world
coordinate system (WCS). Carlson
works exclusively in the world coordinate system and there is no way to
change
this setting. In AutoCAD, it is possible to change the coordinate
system from
WCS. If you receive a drawing in which the coordinate system is not set
to
world, click this on to restore the UCS.
Remove Layers With No
Entities
AutoCAD drawings work with a "BYLAYER" concept meaning
that layer definitions define the drawing. For example, the layer named
EOP might be used to display polylines at the Edge Of Pavement in the
drawing. Many times extra layers get defined by a user but not used to
display any objects. This function removes any layers defined in the
drawing that are
not being used.
Remove Unused Blocks,
Linetypes and Styles
This functions removes this unused information from the drawing.
Remove Zero Length Linework
This function seeks out and removes any linework definition that have
zero length. Point nodes are not removed.
Remove Duplicate Linework
This function finds any duplicate linework in the drawing and removes
all but one set.
Remove Overlapping Polyline Loops
Polylines that completely overlap
themselves are broken into two different polylines.
Join Linework With Same Endpoint
This function finds common endpoints on linework on common layers with
common elevations and joins the linework
into a continuous polylines. This is very helpful for future selection
sets.
Convert Splines, Multilines and
Regions Into
Polylines
Some CAD applications utilize Spline Object Definitions and Regions,
Carlson utilizes basic polyline/polygon definitions. This
function finds any Splines and/or Regions defined in the drawing and
re-defines them as simple polylines or polygons.
Convert Lines, Arcs, Circles,
Ellipses, 3DFaces and Solids Into
Polylines
By converting Lines, Arcs, Circles, Ellipses, 3D Faces, and Solids into
Polylines, you can use the variety of Polyline commands available in
Carlson.
Convert LDD-AEC Contours and Points
Into
Carlson Format
Drawings created in the Land Development Desktop CAD program can
contain special objects known as LDD-AEC contours that define their
topographic contour display. This function locates those special
objects and re-defines them as simple 2D polylines retaining
their
elevation values.
Convert Entities With Extrusion To World Coordinates
Drawings created in the Land Development Desktop CAD program can
contain special objects known as LDD-AEC contours that define their
topographic contour display. This function locates those special
objects and re-defines them as simple 2D polylines retaining
their elevation values.
Erase Hatch Entities
Carlson offers many hatch display options, however hatch
entities have no 3D value. This function removes all hatch entities in
the original drawing to help reduce the size and clutter of the drawing
file.
Remove Arcs From Polylines - Offset
Cutoff
This function replaces arcs in polylines with a series of short chord
segments. The purpose is to prepare the polylines for modeling since
arcs need to be converted into segments to be part of the triangulation
model. The density of of chord segments is controlled by the offset
cutoff. This cutoff represents how much the polyline can move
horizontally. A smaller cutoff will result in more chord segments. The
option for 3D Only controls whether only polylines at zero elevation or
both zero and elevated polylines get processed. Sometimes you may want
to leave the arcs in zero elevation polylines when these polylines
represent road alignments and are not part of the surface model.
Reduce Polyline Vertices - Offset
Cutoff
This function utilizes a pre determined offset amount and removes
unnecessary polyline vertices that fall within the offset amount.
Set Elevations Outside Range to
Zero and Elevation Range
This function comes with a "Scan DWG" option that audits the
elevation
range in the drawing file. Once the minimum and maximum elevation range
has been set, manually or by a scan, all objects that fall outside the
set range are moved to elevation zero. All objects at zero elevation do
not contribute to the 3D model.
Entities To Process...
This allows you to run the command for the entire drawing or for a
selected set.
Default
This allows you to return to the Carlson Drawing Cleanup default
settings.
Final Report
This example report displays the results of drawing cleanup. Like all
reports in Carlson, this report can be saved to a text file,
sent directly to your printer, or pasted onto the screen ad text
entities.
Pulldown Menu Location: File
Keyboard Command: dwg_cleanup
Prerequisite: None
File Name: \lsp\poly3d.arx