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ATEC 4371.001 Procedural Animation

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

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  1. ATEC 4371.001Procedural Animation Introduction to Procedural Methods in 3D Computer Animation Dr. Midori Kitagawa

  2. In class • Pay attention • Take notes • Learn • Be ready for a pop quiz

  3. Week 6: Modeling • Assignment 4 review – The earth’s tilt • Assignment 6 review • Basic modeling methods • Assignment 12

  4. Basic Modeling Methods • Lofting • Extrusion • Sweeping • Surface of evolution • Boolean operations

  5. Lofting • Originated in boat design • 2D cross-sections placed in 3D space are connected by side faces to form a 3D shape.

  6. 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.

  7. Sweeping • 2D cross-section is swept along a 3D path to create a 3D shape.

  8. Surface of revolution • 2D profile is rotated around an axis to create a 3D shape.

  9. 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

  10. Boolean operations • Cookie SOP in Houdini • Can produce a complicated object with a repeated used of operations. • Prone to computational errors.

  11. 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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