Geometry
The ACIS philosophy related to geometric definitions is that the representation be essentially coordinate system independent, numerically stable, and easily transformed. To this end every definition uses classes to represent positions in space, displacements between positions, and directions. In addition, some require scalar values to represent distances or dimensionless quantities. These are simply floating point numbers, and their specific meaning is determined within the transformation algorithm.
Topics include:
- Types of Curves and Surfaces
- Construction and Model Geometry
- Abstract and Specific Geometry
- Geometry Data
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