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The Materials and Geometry Format
Version 1.0, May 1995
Greg Ward, Lawrence Berkeley Laboratory, [email protected]Introduction
What makes MGF special?
What does MGF look like?
MGF has a simple entity-per-line structure, with a similar appearance to Wavefront's .OBJ format. Each entity is specified by a short keyword, and arguments are separated by white space (tabs and/or spaces). A newline may be escaped with a backslash ('\'), in which case it counts as a space. Lines and continued lines may have up to 4096 characters, including newlines, tabs and spaces. A comment is an ignored entity whose keyword is the pound sign ('#').Here is an MGF file that describes a simple two-drawer file cabinet:
# Conversion from inches to meters xf -s .0254 # Surface material m burgundy_formica = c cxy .362 .283 rd .0402 c rs .0284 .05 sides 1 # Cabinet vertices v fc.xy = p .05 0 0 v fc.xY = p .05 18 0 v fc.XY = p 35.95 18 0 v fc.Xy = p 35.95 0 0 # Cabinet prism fc.xy fc.xY fc.XY fc.Xy 24 # Drawer vertices v fcd.Xz = p 34 0 0 v fcd.XZ = p 34 0 10 v fcd.xZ = p 0 0 10 v fcd.xz = p 0 0 0 # Two drawers o drawer xf -t 1 18.1 2 -a 2 -t 0 0 11 prism fcd.xz fcd.Xz fcd.XZ fcd.xZ .9 xf o # End of units conversion xf
MGF's place in the world of standards
MGF Basics
Entities and Contexts
Hierarchical Contexts and Transformations
Detailed MGF Example
MGF Entity Reference
MGF Translators
MGF Parser Library
Application Notes
Relation to Standard Practices in Computer Graphics
Relation to IESNA LM-63 and Luminaire Catalogs
Credits
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Apr 21, 2025 09:12 PM