Graphics Programs Reference
In-Depth Information
Surface analysis
There are three commands, since Version 2011, that perform surface analysis and
another activity to adjust options. These analysis are useful when needing to check
continuity, curvature, and draft angles, like in the mould industry.
These commands can not be used with the
2D wireframe
visual style and are only
available on the ribbon,
Surface
panel.
Types of analysis and commands
AutoCAD considers three types of analysis, which can be applied to surfaces or
solids:
•
Zebra analysis
: Surfaces are analyzed about their continuity by projecting
parallel black and white stripes onto the model (default), where surfaces
meet and stripes allow analyzing curvature and tangency
•
Curvature analysis
: Surfaces are analyzed about their curvature with a
color gradient
•
Draft analysis
: Surfaces are analyzed about how easy they would be sep-
arated from the mould
The ANALYSISZEBRA command
The
ANALYSISZEBRA
command (alias
ZEBRA
) prompts for the selection of solids and
surfaces and displays stripes on surfaces. These stripes allow you to detect nontan-
gencies and curvature changes:
Command:
ANALYSISZEBRA
Select solids, surfaces to analyze or [Turn
off]:
Selection
The ANALYSISCURVATURE command
The
ANALYSISCURVATURE
command (no alias) prompts for the selection of solids
and surfaces and displays a color gradient. If gaussian curvature is positive (convex),
the color is green, and if it is negative (concave), the color is blue:
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