# Curves

## Line

Component Code – Line

Parameter Groups – As shown below ### Line2p (2 points)  ### Linept (point+tangent) Qty has been chosen as 2 and onright1 parameter has been formulated to have different values for each instance.

TanCurve1 is a string parameter which needs to evaluate into a circular entity.

C1 is a circle centred at (0,0) and with a radius of 20.  ### Linepper (point+perpendicular) L2p is a previously created line. ### Line2t (tangent+tangent)

TanCurve1 and TanCurve2 are string parameters which need to evaluate into circular entity.

#### Circles Not Intersecting Case 1  #### Circles Not Intersecting Case 2

If two circles don’t intersect and one circle is completely constrained inside the other, no tangent is possible.

#### Circles Intersecting at 2 Points  #### Circles Intersecting at 1 Point Case 1  #### Circles Intersecting at 1 Point Case 2  ### Linetper (tangent+perpendicular)  ## Polyline

Code – Pline

Parameters – Pointlist, Bulgelist, Closed

Pointlist is the list of points

Bulgelist is the list of bulges. If the bulgelist parameter contains less items than pointlist, bulge is automatically taken as 0 for the remaining vertices.

Closed – If closed is set to 1 the polyline is closed.    ## Circle

Component Code – Circle

Parameter Groups – As shown below   ### Circle 2p (2 points)  ### Circle 2pr (2 points + Radius)  ### Circle 3p (3 points)  ### Circle ptr (Point tan radius)  ### Circle ttr (Tan tan radius)  ### Circle ttt (Tan tan tan)

Currently not implemented.

## Ellipse (centre,majorLen,minorLen)

Component Code – Ellipse  ## Arc

Component Code – Arc

It is notable here that arc component is always drawn in anticlockwise direction.

Parameter Groups – As shown below ### Arc 3p (3 points)  ### Arc 2pr (2 points + radius)  ### Arc 2pang (2 points + Angle)  ### Arc 2ptan (2 points + Tangent)

Point1 needs to be on the curve identified in tancurve1 parameter.  ### Arc 2ptan (2 points + Perpendicular)

Point1 needs to be on the curve identified in perpento parameter.  ### Arc ttr (tancurve1, tancurve2, Radius)  ### Arc2pc (Centre + 2 Points)  ### Arc pcang (Centre + Point + Angle)  ### Arc pclen (Centre + Point + Length)  Component Code = Hatch

Curvelist = list of curves which define a boundary.

Any one of Gradient or Pattern should be used.

Pattern = Name of any of the built in pattern in AutoCAD  ## Point

Component Code = point

Creates a point in the current component block

Used to create a reference point which can be used later in the model.  ## Rectangle

Component Code = rect

Parameter Groups = As shown below Rectangle 2p (2 points), Rectangle plw (point + length + width)  ## SplineCurve (pointlist)

Component code - Spline  ## OffsetCurve (Ent1,Offset)

Component Code = OffsetCurve  