| Data Structure: Part_surface | |
| Description | part surfaces and associated definition data | 
| Usage | Part_surface NUM=ival where ival is the data structure number | 
| Description | 
| Overview The Part_surface structure stores the definition of a part surface together with the associated data defining the surface tessellation. 
 Notes •One Part_surface data structure is defined for each part surface 
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|  | Name Surface name | 
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| Description | ||||
| Name for the part surface (maximum 32 characters). If the surface is a fault surface it is the fault name 
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|  | Surface_type Surface type ("Standard", "Fault", "Discontinuity") | 
| Usage | ||||
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| Description | ||||
| Valid surface types are: • "Standard" - Standard part surface which if deformed stretches uniformly (Default) • "Fault" - Fault part surface where the surface represents a fault • "Discontinuity" - Discontinuity part surface where the surface represents a moving discontinuity (similar to a fault) 
 For the "Fault" and "Discontinuity" cases the Offset_lines must also be specified. | 
|  | Facets List of facets for current mesh (for volume meshes) | 
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| List of facets defining surface tessellation. The facet numbering should be ordered consistently and the positive facet normal is defined by a left hand rule. 
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|  | Part_lines List of part lines defining part surface | 
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| List of part lines defining the part surface. 
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