Adobe Acrobat 9 PRO Extended - Manual (Page 384)

378 USING ACROBAT 9 PRO EXTENDED
3D models and geospatial PDFs
Last updated 9/30/2011
Fonts Click fonts to set up substitute fonts for the fonts in the original 3D file.
Assembly Click Assembly to define the directories to search to find parts that are not in the current folder. For large
assemblies in which the master file refers to many parts and subassemblies, some parts can be in multiple directories.
Optimize tab
Adjust the Optimize settings to select the file format to convert 3D data to and the corresponding compression.
3D Format in PDF Choose between U3D and PRC conversion formats in the Format menu. The file format of your 3D
model determines which settings are available.
Surface Triangulation Level Of Detail Specify the level of detail used to display the 3D model. Higher settings produce
more accurate results. Lower levels of detail are useful for quick visualization with reduced visual quality. Two settings
allow you to set specific height and angle measurements:
• User Defined Use to produce good quality model rendering for visualization, but not for export to STL.
• Controlled Precision Use to create exact geometry for export to STL printers.
Level of detail can only be set when you import a model. If you import a model with User Defined tessellation, you
must reimport the file to create the tessellation required for STL printers (Controlled Precision).
When you select either User Defined or Controlled Precision, click Advanced to create exact measurements.
• Chord Height Ratio Specifies the percentage of bounding box used to compute chord height. Set a value from 50
through 10,000.
• Wireframe Chord Angle Specifies the maximum angle between two contiguous segments of wire edges for every
face. The value must be from 10 through 40.
• Maximum Chord Height Specifies the maximum distance, in millimeters, between surface and tessellation.
• Minimal Triangle Angle Specifies the angle between two contiguous segments of wire edges for every face. The
value must be between10 and 30.
• Binary File Creates a binary version of the STL output file, which is smaller than the standard ASCII STIL file.
PRC
Compress B-rep To The amount (in millimeters) of lossy compression applied to geometry. For best results when
exporting geometry, set the amount to 0.001 or leave this option unselected.
You can compress the geometry after you convert the 3D file to PDF by right-clicking the 3D model and choosing
Optimize PDF.
Compress Tessellation Applies lossy compression to polygons.
U3D
Mesh Quality Controls the quality relative to the percentage of lossy compression applied to the image files. Higher
percentages indicate less compression and better image quality. A setting of 100% applies no compression.
Geometry
Center Model At Origin Translates the entire model so that the center of its bounding box is at the origin [0,0,0] of the
XYZ coordinate system.