Virtual Engagement Final: Scripting With UDFs and Knowledge Patterns in Catia

Final Project Sketch_ Scripting With UDFs and Knowledge Patterns in Catia cont.

Final Project Sketch_ Scripting With UDFs and Knowledge Patterns in Catia

Using UDFs and Knowledge patterns in a single part file to script a "box morph" unit between two surfaces. Then unroll that unit with another script. And finally export the unrolled polysurfaces to rhino where tabs and labels will be added and then laser cut.

Scripting in Catia: Using Knowledge Patterns

Using Knowledge patterns in the way described in this tutorial allows for more of a scripting workflow within a single part. This eliminates the need for multiple part files and a catalog file.

 let vcrvs (VCrvUDF)
let i (integer)
let pt (point)
let spacing (length)
let num (length)
let ratio (real)

spacing = Vspacing

num = int(length (VCrvConstruction\Input\Line.1 )/spacing)

ratio = 1/num

for i while i < num
{
pt =pointoncurveRatio(VCrvConstruction\Input\Line.1 ,`00FrameworkSketch\Point.3` ,i*ratio,true)
vcrvs=CreateOrModifyTemplate("VCrvUDF" ,VCurves ,`Relations\Knowledge Pattern.5\VCrvsList` ,i)
vcrvs.xyplane =xyplane
vcrvs.Point.7 =pt
vcrvs.MultisectionsSurface.1 =`VCrvConstruction\Input\Multi-sections Surface.1`
EndModifyTemplate(vcrvs)
i = i + 1
}

 

Jax Wall: Grasshopper vs Catia Part1

Knowledge Patterns Part 2

UDF_Knowledge Resource Patterns Part1

Folding Assembly Design

Parts and Products

Decentralization in Scripting

Reading Response: Turtles, Termites, and Traffic Jams: Explorations in Massively Parallel Microworlds - Mitchel Resnick

To continue Resnick's idea of decentralized logic in organizations, technologies, scientific models, theories of self and mind, and theories of knowledge, I am continuing this discussion in the realm of software, 3D modeling, and parametrics. In computational modeling and parametrics precedent is typically given to the parent/child relationship---such as inherent in the logic of Catia. Attempting to decentralize this on an overall scale is potentially disastrous in that the egg must follow the chicken in this instance. However when thinking of the decentralization, a good example are the constraints of Catia's sketch parameters. For a more simplistic example: in a parent child relationship a set of points must always precede a line. However, if we were to introduce a decentralization to this logic, the two points wouldn't necessarily be based on a set of cartisian or vector distances from each other as much the points would be the centroids of coincidental circles. This could be further decentralized by randomizing the radii of the circles .

Powercopies with Excel and Rules

Reading Response: Architectural Geometry - Helmut Pottmann

Although every rarametrics and modeling class tends to begin with a reading about developable surfaces how ever it is not for nothing. Developable surface are still the most efficient means of fabricating more complex designs. When developing parametrics designs this means that utilizing cylindrical shapes, conical shapes, and tangental shapes or any part there of lends itself to a buildable design. Developable surfaces and panelization lends itself to metal fabrication, glass facade, plywood and some plastics. However anything not developable must be CNCed or utilize some of the more experimental fabrication techniques. Although developable and pannelized surfacing doesn't push the limits of digital fabrication it does appeal to the more cost effect side equation.

DP-Unfolding of powercopies