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ATEC 4371.001 Procedural Animation. Introduction to Procedural Methods in 3D Computer Animation Dr. Midori Kitagawa. In class. Pay attention Take notes Learn Be ready for a pop quiz. Week 6: Modeling. Assignment 4 review – The earth’s tilt Assignment 6 review Basic modeling methods

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atec 4371 001 procedural animation

ATEC 4371.001Procedural Animation

Introduction to Procedural Methods in 3D Computer Animation

Dr. Midori Kitagawa

in class
In class
  • Pay attention
  • Take notes
  • Learn
  • Be ready for a pop quiz
week 6 modeling
Week 6: Modeling
  • Assignment 4 review – The earth’s tilt
  • Assignment 6 review
  • Basic modeling methods
  • Assignment 12
basic modeling methods
Basic Modeling Methods
  • Lofting
  • Extrusion
  • Sweeping
  • Surface of evolution
  • Boolean operations
lofting
Lofting
  • Originated in boat design
  • 2D cross-sections placed in 3D space are connected by side faces to form a 3D shape.
extrusion
Extrusion
  • Also called projection
  • A copy of a 2D profile is made and translated and then the original and copied profiles are connected by side faces to form a 3D shape.
sweeping
Sweeping
  • 2D cross-section is swept along a 3D path to create a 3D shape.
surface of revolution
Surface of revolution
  • 2D profile is rotated around an axis to create a 3D shape.
boolean operations
Boolean operations
  • Boolean operation -- union (or, “u”), intersection (and, “n”), or difference (not, “-”) -- is applied to a pair of objects.

A u B

A - B

B - A

A n B

boolean operations1
Boolean operations
  • Cookie SOP in Houdini
  • Can produce a complicated object with a repeated used of operations.
  • Prone to computational errors.
assignment 12
Assignment 12
  • Create 3D models of three different kinds of sea shells.
  • At least one should be a univalve (a single coiled shell), the other(s) a bivalve.
  • Color each model with at least two colors using Group SOPs.
  • Make them as realistic as you can.
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