shapeL, shapeU, shapeO operations

Syntax

shapeL(frontWidth, leftWidth) { selector operator operations | selector operator operations }

shapeU(frontWidth, rightWidth, leftWidth) { selector operator operations | selector operator operations }

shapeO(frontWidth, rightWidth, backWidth, leftWidth) { selector operator operations | selector operator operations }

Parameters

frontWidth (float)
Depth of front wing.
leftWidth (float)
Width of left wing.
rightWidth (float)
Width of right wing.
backWidth (float)
Depth 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
The operator defines how the setback polygons are used to generate successor shapes. This also applies to shapes with more than one face.

: Each polygon is put into a new shape.

= All polygons corresponding to the selector are combined into one new shape.
operations
A 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.

These operations are 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 | ... }

Component tags

The operations automatically apply semantic component tags to the resulting edge components (exactly like the setback operation):

"setback.front" Blue: original edges in shape.

"setback.back" Green: new setback edges.

"setback.side" Yellow: side edges.

"setback.remainder" Purple: original edges in remainder.

Left --> shapeL(4,4) { shape : Shape | remainder: Remainder } Middle --> shapeU(4,4,4) { ... } Right --> shapeO(4,4,4,4) { ... }

For more information on working with component tags, refer to Auto-tags and Tag propagation.

Examples

L-Shapes

A block filled with 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

A block filled with 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

A block filled with 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)

shape	The setback polygon (i.e. the L,U or O shape).
remainder	Selects the remainder of the polygon.

:	Each polygon is put into a new shape.
=	All polygons corresponding to the selector are combined into one new shape.