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GRD

Include 3 commands:
GRD: Summary the angle of selected line or polyline including such subentities inside a block in 3 formats: fraction, percentage, and degree.
CSE: Rotate UCS to selected subentity.
CS1: Rotate UCS 90 degree.
 
 
INTRODUCTION
 
Command: GRD
It is useful when you need check the roof pitch, the floor fall, ramp gradient, etc in a section drawing, and need convert it in different formats.
Select a line:
The gradient of the line is 1/1.9, 52.4%, 27.65 degree.
If selected object is a vertical line, it prompts:
It is a vertical line.
If the gradient is greater than 10000/1, but not exactly a vertical line, it prompts:
It is almost a vertical line.
If selected object is a horizontal line, it prompts:
It is a horizontal line.
If the gradient is greater than 1/10000, but not exactly a horizontal line, it prompts:
It is almost a horizontal line.
 
Command: CSE
Align ucs to selected line, including polyline segment and line/polyline in a block or xref.
Command: CS1
Rotate UCS around Z axis 90 degree.
 
NOTES
Only line, polyline, or such subentities inside a block are valid for selection.
Otherwise it prompts:
Selected object is not a line or polyline.
If select segment in the polyline is an arc, it prompts:
Selected segment is not a line.
 
 
UPDATES
16 May 2013 Fixed a bug when inquiring gradient of a sub-entity in polyline or block
                    Add new command CSE to align ucs to selected line (including polyline segment and line/polyline in a block or xref)
                    Add new command CS1 to rotate UCS around Z axis 90 degree. 
07 Jun 2011 Able to find out gradient of polyline segment and subentity inside a block.
07 Apr 2010 First issue