Parametric Design

1
Parametric Design

• 00. Course Description

2
Course Description

• Introduction of parametric modeling methods
• Modeling exercise with parametric 3D CAD tool
• Digital Project Gehry Technology

3
Course Objectives

• Understanding parametric modeling concept and its
  application in architectural design
• Understanding nature of computer as a design tool
• Using parametric CAD as architectural design tool
• Digital Project Fundamentals
• Creating and manipulating free form objects
• Defining parametric custom objects
• Programming with VB
• Architectural drawing

4
Course Outline

• Lecture
• Intro to geometric modeling
• Parametric modeling
• Object with programming
• Working with other platforms
• Lab
• Digital project workshop

5
Grading

• Lab exercise 50
• Midterm project 10
• Final project 30
• Participation 10

6
Misc

• Course Website
• http//dcom.arch.gatech.edu/class/pd/
• Contact
• Email
• donghoon.yang_at_arch.gatech.edu
• Office
• COA Rm. 217 (AEC Integration Lab / PhD lab)
• Office hour
• Tue/Thu 300 - 500
• Or by appointment

7
Parametric Design

• 01 Why Parametric?

8
What do we see on Computer?

• Bitmap
• A data file or structure which corresponds bit
  for bit with an image displayed on a screen.
• the width and height of the image in pixels
• the number of bits per pixel which determines the
  number of shades of grey or colors it can
  represent.
• Pixel
• (pixel) The smallest resolvable rectangular area
  of an image, either on a screen or stored in
  memory. Each pixel in a monochrome image has its
  own brightness, from 0 for black to the maximum
  value (e.g. 255 for an eight-bit pixel) for
  white. In a colour image, each pixel has its own
  brightness and colour, usually represented as a
  triple of red, green and blue intensities (see
  RGB).

9
Vector

• The representation of separate shapes such as
  lines, polygons and text, and groups of such
  objects, , which are all based upon mathematical
  equations to represent images in computer
  graphics.

Vector
10
(No Transcript)
11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
Bitmap / Vector

• 2D bitmap
• 2D vector
• 3D bitmap
• 3D vector

15
3D bitmap

• Voxel
• The smallest distinguishable box-shaped part of a
  three-dimensional space. A particular voxel will
  be identified by the x, y and z coordinates of
  one of its eight corners, or perhaps its centre.
  The term is used in three dimensional modeling.

16
Vector and CAD

• Visual representation
• Internal modeling

17
Inside CAD

• Core geometry function of all 2D and 3D modeling
  applications.
• Modeling
• Model Management
• Model Visualization
• ACIS, Parasolid, Granite, CATIA kernel
• Rendering of 2D and 3D graphics
• accept primitives such as points, lines and
  polygons, and convert them into pixels
• OpenGL, DirectX

18
Geometry Modeling

• Graphic Modeling
• Surface Modeling
• Solid Modeling
• Parametric modeling
• Feature based Modeling

19
Geometry Modeling

• Graphic Modeling
• 2D lines, arcs, conics, texts, symbols
• 3D wire frame

20
Geometry Modeling

• Surface Modeling
• Parametric curves Composite curves, Bezier
  curves, B-Spline,
• Parametric surfaces B-Spline surfaces, Ruled
  surfaces,

21
Geometry Modeling

• Solid Modeling
• Boundary models
• Constructive models

22
Geometry Modeling

• Parametric modeling
• Feature based Modeling

23
What is parametric model?

• The use of parameters to define a form
• Line, curve, circle
• Blocks, Cells, Symbols,Components

24
Parametric model

• Topological description of object relationship
  with other objects
• Constraints specifying dimensions and
  specification
• Evaluation
• Variation and reuse of existing design

25
Topology

• The mathematical study of the geometric
  properties that are not normally affected by
  changes in the size or shape of geometric
  figures.
• American heritage
• The mathematical study of the properties that are
  preserved through deformations, twistings, and
  stretchings of objects.
• Wolfram Mathworld

26
Topological description
27
Constraints
28
Evaluation
29
Variation and reuse
30
Variation and reuse
31
Other areas
32
Other areas
33
Other areas
34
Architectural Parametric Objects
35
Architectural Parametric Objects
36
Architectural Parametric Objects
37
Benefit of Parametric 3D model

• Reusable design
• Intelligence evaluation
• Adding more information

38
Parametric modeling application

• Pro-Engineer
• Solidworks
• Siemens PLM Solutions (UGS) NX
• CATIA
• Autodesk Inventor

39
Parametric modeling application for architecture

• Revit / Revit Structure
• Bentley Architecture
• Graphisoft ArchiCad / Constructor
• Digital Project
• Vectorworks
• Tekla Structures
• Design Data SDS/2
• DProfiler

40
Digital Project

• Catia based
• Full parametric definition
• Capable to handle complex geometry
• Alternative storage method
• Interoperable with subsystem
• BIM Design tools, Fabrication tools
• www.gehrytechnologies.com

41
Questions?
42

• http//www.gehrytechnologies.com/products-academic
  -licensing-policy.html
• http//www.gtwiki.org