CAD Entities
Polyline
Polylines consist of multiple straight line and circular arc segments.
Polylines are used internally to represent toolpath shapes as they correspond well to gcode G1 (line) and G2,G3 (arc) moves.
Properties
Closed

True  False
Open polylines have two ends and no defined inside or outside.
Closed polylines are where the first and last points are the same and have a well defined inside and outside.
Note Polylines with first and last points having the same coordinates are not necessarily closed. The closed marker should
be set to True for these shapes otherwise unexpected results may occur.

Points

This property contains a collection of polyline points. Clicking the [...] button to the right of the property will open up
a window where the points can be edited directly.
Each point contains an X,Y and Z coordinate and a bulge parameter.
Bulge is defined as tan(sweep angle/4) for arc segments, where bulge=0 is a straight line.

Tag

A general purpose, multiline text field that can be used to store notes or parameter data.

Transform

A 4 x 4 matrix of numbers used for general transformations of the drawing objects.
The transform matrix can be used for rotations, translations and scaling about all 3 axis.
Identity indicates no transformations will be applied to the object.

Region
A region consists of a closed outer shape and a number of internal holes.
To create a region, select inner and outer shapes then use the Edit  Convert  To Region menu option, or press CTRL+R
Circle
Properties
Center

The coordinates of the center of the circle

Diameter

The diameter of the circle.

Tag

A general purpose, multiline text field that can be used to store notes or parameter data.

Transform

A 4 x 4 matrix of numbers used for general transformations of the drawing objects.
The transform matrix can be used for rotations, translations and scaling about all 3 axis.
Identity indicates no transformations will be applied to the object.

PointList
Point lists are useful for defining points to be used for drilling operations.
As well as drawing directly, they can be created from the DrawPoint List menu operations
Divide Geometry

Evenly divides a selected shape into a given number and inserts a point at each division.
This is useful for generating a bolt hole pattern.

Step Around Geometry

Inserts a point at given distances around a selected shape.

Fill Geometry

Fills a closed shape with points.

Offset Fill Geometry

Fills a closed shape with points where alternating rows are offset by half the stepping distance.

Centers

Inserts a point at the center of each selected object.

Extents

Inserts a point at the extremities and center of a boundary rectangle enclosing each selected object.

Properties
Points

This property contains a collection of points. Clicking the [...] button to the right of the property will open up
a window where the points can be edited directly.

Tag

A general purpose, multiline text field that can be used to store notes or parameter data.

Transform

A 4 x 4 matrix of numbers used for general transformations of the drawing objects.
The transform matrix can be used for rotations, translations and scaling about all 3 axis.
Identity indicates no transformations will be applied to the object.

Rectangle
Properties
Corner Radius

This will round the corners of the rectangle to a given radius.

Height

The height of the rectangle.

Lower Left

The coordinates of the lower left corner of the rectangle.

Width

The width of the rectangle.

Tag

A general purpose, multiline text field that can be used to store notes or parameter data.

Transform

A 4 x 4 matrix of numbers used for general transformations of the drawing objects.
The transform matrix can be used for rotations, translations and scaling about all 3 axis.
Identity indicates no transformations will be applied to the object.

Properties
Bold

Bold Font Style.

Char Space

This option scales the width used for each character. The default is 1. A setting of 2 would double the space used for each character
(but not the character itself).

Font

This is the name of the font to use for the text.

Height

This is the text height in drawing units.
The height is based on the em square, which is a property of the font that describes the largest
dimensions possible of the font.
To obtain an accurate height, given the text and font entered, the Edit  Resize command should be used.

Italic

Italic Font Style.

Line Space

This scales the distance between each text line. The default is 1.

Location

This is the first and at the moment, only alignment point. The TextAlignmentH and TextAlignmentV options are all relative to this point.

Regular

Regular Font Style.

Tag

A general purpose, multiline text field that can be used to store notes or parameter data.

Text

The text to enter. To enter multi line text, click the [...] button after this property.

Text Alignment Horizontal

Left, Center or Right (relative to Location).

Text Alignment Vertical

Top, Center or Bottom (relative to Location).
NOTE: Bottom is actually the baseline of the text.

Transform

A 4 x 4 matrix of numbers used for general transformations of the drawing objects.
The transform matrix can be used for rotations, translations and scaling about all 3 axis.
Identity indicates no transformations will be applied to the object.

Arc
Properties
Center

The center of the arc.

Radius

The radius of the arc.

Start

The start angle in degrees of the first arc point. Angle = 0 is along the positive X axis.

Sweep

The sweep angle in degrees from the first to second arc point. Positive angles are counter clockwise and negative angles clockwise.

Transform

A 4 x 4 matrix of numbers used for general transformations of the drawing objects.
The transform matrix can be used for rotations, translations and scaling about all 3 axis.
Identity indicates no transformations will be applied to the object.

Line
Lines have multiple segments, similar to polylines, but can only contain straight sections.
Surface
Surfaces are triangle face meshes imported from STL and 3DS files.
Spline
Splines (or NURBS) are curves that are defined by a series of control points and weights.