ATEC 4371 001 Procedural Animation Introduction to Procedural

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ATEC 4371. 001 Procedural Animation Introduction to Procedural Methods in 3 D Computer Animation

ATEC 4371. 001 Procedural Animation Introduction to Procedural Methods in 3 D Computer Animation Dr. Midori Kitagawa

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

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

Week 6: Modeling Basic modeling methods Assignment 12

Week 6: Modeling Basic modeling methods Assignment 12

Basic Modeling Methods Lofting Extrusion Sweeping Surface of evolution Boolean operations

Basic Modeling Methods Lofting Extrusion Sweeping Surface of evolution Boolean operations

Lofting Originated in boat design 2 D cross-sections placed in 3 D space are

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

Extrusion Also called projection A copy of a 2 D profile is made and

Extrusion Also called projection A copy of a 2 D profile is made and translated and then the original and copied profiles are connected by side faces to form a 3 D shape.

Sweeping 2 D cross-section is swept along a 3 D path to create a

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

Surface of revolution 2 D profile is rotated around an axis to create a

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

Boolean operations Boolean operation -- union (or, “u”), intersection (and, “n”), or difference (not,

Boolean operations Boolean operation -- union (or, “u”), intersection (and, “n”), or difference (not, “-”) -is applied to a pair of objects. Au. B An. B A-B B-A

Boolean operations Cookie SOP in Houdini Can produce a complicated object with a repeated

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

Assignment 12 Create 3 D models of three different kinds of sea shells. At

Assignment 12 Create 3 D 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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