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Man Pages


Manual Reference Pages  -  EV (n)

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NAME

ev - Evaluates the objects specified by tessellating all primitive shapes in the objects and then performing any Boolean operations specified in the objects. The result is then displayed in the MGED display according to specified options.

CONTENTS

SYNOPSIS

ev [-dfnrstuvwST] [-P #] [-C #/#/#] {objects} []

DESCRIPTION

Evaluates the objects specified by tessellating all primitive shapes in the objects and then performing any Boolean operations specified in them. The result is then displayed in the MGED display according to specified options.

o

o

d--Do not perform Boolean operations or any checking; simply convert shapes to polygons and draw them. Useful for visualizing BOT and polysolid primitives.

o

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f--Fast path for quickly visualizing polysolid primitives.

o

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w--Draw wireframes (rather than polygons).

o

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n--Draw surface normals as little “hairs.”

o

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s--Draw shape lines only (no dot-dash for subtract and intersect).

o

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t--Perform CSG-to-tNURBS conversion (still under development).

o

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v--Shade using per-vertex normals, when present.

o

o

u--Draw NMG edgeuses (for debugging).

o

o

S--Draw tNURBs with trimming curves only, no surfaces.

o

o

T--Do not triangulate after evaluating the Boolean (may produce unexpected results if not used with the w option).

o

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P#--Use # processors in parallel. Default=1.

o

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r--Draw all objects in red. Useful for examining objects colored black.

o

o

C#/#/#--Draw all objects in the specified rgb color.

EXAMPLES

The first example shows the use of the ev command to display two evaluated objects as shaded polygons. The second example shows the use of the ev command to display an evaluated object as wireframe without triangulating.

Example 1. Display evaluated objects as polygons.

mged> ev region1 shapea

Displays evaluated region1 and shapea as shaded polygons.

Example 2. Display an evaluated object as wireframe without triangulation.

mged> ev -wT region1

Displays an evaluated object, region1, as wireframe without triangulation.

AUTHOR

BRL-CAD Team

BUG REPORTS

Reports of bugs or problems should be submitted via electronic mail to <devs@brlcad.org>, or via the "cadbug.sh" script.

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BRL-CAD EV (nged) 04/04/2016

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