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1. What is geometric modeling?
• Collection of methods used to define the
shape and other geometric characteristics of
an object.
• To construct a precise mathematical
description of the shape of a real object or to
simulate some process.
• Embraces area – computational geometry

2. What is geometric modeling?
• special case of mathematical modeling
• the visual features are important.
• geometric model - physical object.
• non-geometric model – physical process e.g economic

3. Geometric data
• To make pictures/ design new things need a
computer representation of objects.
• Need to represent
– Shape
– Appearance (color, shininess etc)
– Material properties (density, stiffness etc)

4. • Geometric data representation
- Compute a mathematical approximation of the physical
shape of an object
• Algorithms for manipulating geometry
– Manipulate the variables defining the shape until we meet
the objective.
• Geometry creation
– Interactive.
– Automatic creation.
geometric modeling

5. Application
• Computer Aided Design/ engineering
(CAD/CAE)
• Entertainment
– Special effects
– Animation
– games
• Scientific visualization
• Education, information, advertising

6. CAD/CAE
• Stages
– Conceptual design
– Mechanical design
– Simulation
– Production
• Geometric data need to be shared

7. CAD/CAE
• Conceptual design

8. CAD/CAE
• mechanical design

9. CAD/CAE
• simulation

10. Special effect
• Merge real and virtual
objects
• Create virtual scenes
indistinguishable from
reality

11. animation

12. games
• Adventure - interactive

13. visualization
geographical
medical
Bio-geometric

14. Requirement : Visualization
• Space efficiency
• Generality
• Precision
• Support fast algorithms

15. disediakan oleh Suriati bte Sadimon GMM,
FSKSM, UTM, 2004
Solid object construction method
• Sweeping
• Boolean
• Automated filleting and chambering
• Tweaking
– Face of an object is moved in some way