MATLAB SIMULINK 3D ANIMATION 5 Bedienungsanleitung PDF herunterladen (Seite 26)

When exporting CAD models into VRML format, usually several options can be

set to customize the output, either as options specific to export filters, or as

general CAD document properties. Most usual and useful are the following:

 VRML format type

 Level of detail of exported files

 Units used in exported files

 Coordinate system used

 Assembly hierarchy

Consult your CAD system documentation for details on setting these

properties.

5.1.1. VRML Format Type

There are two major versions of the VRML format used by graphic tools – older

format VRML1 and newer format called VRML2, or more often VRML97,

according to the year of the ISO standard adoption. Simulink 3D Animation uses

VRML97 standard format, so select the VRML97 as the export format.

Hint: If your CAD tool allows only VRML1 format export, you can use the V-

Realm Builder, a native VRML scene editor supplied with the Simulink 3D

Animation, to convert models from VRML1 format to VRML97. Simply open a

VRML1 file and resave it in V-Realm – the file is automatically saved in the

VRML97 format.

All references to general abbreviation VRML here refer to the VRML97

standard.

5.1.2. Level of Detail Considerations

CAD models are usually parametric models that use proprietary methods for

object rendering in various contexts. During VRML model export, the internal

parametric model of the assembly is tessellated –model surface is divided into

triangular meshes (represented in VRML by the IndexedFaceSet nodes). At this

time, it is important to set the granularity of the mesh so that it is suitable for

further use. Model simplification – polygon reduction later on would be very

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 42 43

Keine Kommentare

MATLAB SIMULINK 3D ANIMATION 5 Bedienungsanleitung Seite 26