set operation

set(attribute, value)

attribute selector Name of shape attribute to set.

value bool float string bool[] float[] string[] same type as attribute. Value to assign to shape attribute.

Not all shape attributes are writable!

The set operation assigns a value to a shape attribute of the current shape. There are two kinds of shape attributes: builtin attributes such as material.color or scope.tx and generic attributes, which are declared as rule attributes (see CGA attributes).

Related

resetGeometryoperation resetMaterialoperation setMaterialoperation materialattribute pivotattribute scopeattribute seedianattribute trimattribute

Examples

Builtin Shape Attributes

Enable horizontal trim planes 
set(trim.horizontal, true)
Set x-translation of scope to 0 
set(scope.tx, 0)
Set the material color's red component to 0.5 
set(material.color.r, 0.5)
Assign the built-in test texture to the colormap channel 
set(material.colormap, "builtin:uvtest.png")

Generic Shape Attributes

Setting a generic attribute. 
attr floorNumber = -1
const floorHeight = 4

Init --> extrude(30)
         comp(f) {side : Side }

Side --> split(y) { ~floorHeight : Floor }*

Floor -->
    set(floorNumber, split.index)
    split(x) { ~1 : Wall |  {~3 : Tile}* | ~1 : Wall }

Tile -->
    split(x) { 0.5 : Wall | ~1 : MidTile | 0.5 : Wall}

MidTile-->
    split(y) { 0.5 : Wall | ~1 : Window | 0.5 : Wall }

Window -->
    case floorNumber % 3 == 0 : color(1.0, 0.0, 1.0) X.
    else : X.

Store floor index in a generic attribute, floorHeight. The attribute is then used to color the windows on every 3rd floor in pink.