Syntax
- shapeL(frontWidth, leftWidth) { selector operator operations | ... }
- shapeU(frontWidth, rightWidth, leftWidth) { selector operator operations | ... }
- shapeO(frontWidth, rightWidth, backWidth, leftWidth ) { selector operator operations | ... }
Parameters
- frontWidth—floatDepth of front wing.
- leftWidth—floatWidth of left wing.
- rightWidth—floatWidth of right wing.
- backWidth—floatDepth of rear wing.
- selector—selector
- shape—The setback polygon(i.e the L,U, or O shape).
- remainder—Selects the remainder of the polygon.
- operator—floatThe operator defines how the setback polygons are used to generate successor shapes. This also applies to shapes with more than one faces. Valid operators are:
- ":" each polygon is put into a new shape.
- "=" all polygons corresponding to the selector are combined into one new shape.
- operations—floatA sequence of shape operations to execute on the newly created shape.
Description
The shapeL, shapeU, shapeO operations select a number of edges, depending on predefined spatial selectors, and set them back by a user-defined distance.
Note:
This operation is another way of applying setbacks. For example
shapeL(frontWidth, leftWidth) { selector operator operations | ... }
can also be achieved with the setback operation and the comp function:
setback( comp(fe) { front=frontWidth | left=leftWidth } ) { selector operator operations | ... }
Related
Examples
L-Shapes

attr myFrontDepth = 5
attr myLeftWidth = 11
LotInner -->
Lot
Lot -->
offset(-3,inside)
shapeL(myFrontDepth,myLeftWidth) { shape : Footprint | remainder : NIL }
Footprint -->
extrude(rand(10,20))
color(1,0,0)
U-Shapes

attr myFrontDepth = 5
attr myRightWidth = 3
attr myLeftWidth = 11
LotInner -->
Lot
Lot -->
offset(-3, inside)
shapeU(myFrontDepth,myRightWidth,myLeftWidth) { shape : Footprint
| remainder : NIL }
Footprint -->
extrude(rand(10,20))
color(1,0,0)
O-Shapes

attr myFrontDepth = 5
attr myRightWidth = 3
attr myBackDepth = 2
attr myLeftWidth = 11
LotInner -->
Lot
Lot -->
offset( -3, inside)
shapeO( myFrontDepth, myRightWidth, myBackDepth, myLeftWidth )
{ shape : Footprint | remainder : NIL }
Footprint -->
extrude(rand(10,20))
color(1,0,0)