| SIF Version 2.0 | ||||
| SIF SFF | LSIF | SIF DSG | ||
This table provides a guideline as how to interpret the following two tables.
| Syntax | Description |
|---|---|
| | | Or |
| * | Zero or more |
| + | One or more |
| {} | Grouping a subexpression |
| [] | Optional subexpression |
| Comment Info | Appear in italics |
| Tokens | Appear in ALL CAPITALS |
| Key Words | Appear in bold |
SIF is an ASCII file format which is similar lexically to C code. SIF does not have a preprocessor, and it does not have any macro text facilities. Macro can be simulated using file inclusion. SIF is a static scoped language, like Pascal, and forward references are illegal.
| Token | Description |
|---|---|
| {" ", "\t", "\n"} | White space is used as separators in SIF and then ignored |
| (* ... *) | Multiline comments can be nested |
| # ... \n | Single line comments can be used with multiline comments |
| ( include "filename" ) | Included files are sourced at the point of the include statement and appear to the interpreter as if the SIF description were one sequential file. Circular includes are not allowed. |
| INT | positive or negative constant integer |
| ID | C style identifier |
| ( ) | Delimit expression as in LISP |
| arc | A piece of a circle |
| bezier2d | A tensor product Bezier surface patch |
| body | A set of fused lumps |
| boundary1d | A single outer contour with zero or more inner contours |
| boundary2d | A single outer shell with zero or more inner shells |
| bspline2d | A tensor product BSpline surface patch |
| circle | A circular contour |
| contour | A sequential set of open 1D entities |
| coord_precision | Sets how much accuracy of values should be trusted |
| def | Define |
| e | Exponential or Scientific notation for a value |
| f | A planar facet bounded by a convex contour |
| face | A planar face bounded by an outer contour with zero or more inner contours |
| inst | Instantiate |
| lump | A continuous solid bounded by a single outer shell and zero or more innner shells |
| lumpset | A set of lumps |
| mo | Mirror the orientation in place |
| mx | Mirror along the X-axis through the YZ-plane |
| my | Mirror along the Y-axis through the XZ-plane |
| mz | Mirror along the Z-axis through the XY-plane |
| nested1d | A set of contours which are strictly nested inside a single outer contour |
| nested2d | A set of shells which are strictly nested inside a single outer shell |
| path | A sequential set of open 1D entities |
| r | Row |
| rv | Rotate around the vector by an angle |
| rx | Rotate around the X-axis by an angle |
| ry | Rotate around the Y-axis by an angle |
| rz | Rotate around the Z-axis by an angle |
| sa | Scale all coordinates by the same value |
| shell | A closed surface |
| sv | Scale by the vector |
| sx | Scale the X coordinate by the value |
| sy | Scale the Y coordinate by the value |
| sz | Scale the Z coordinate by the value |
| SIF_SFF | Header stating that this is a SIF SFF type file |
| surface | A set of 2D elements |
| t | A triangle |
| tab | Triangle Array Backward |
| tac | Triangle Array Cross Hatched |
| taf | Triangle Array Forwar |
| tf | Triangle Fan |
| tm | Triangle Mesh |
| tsb | Triangle Strip Backward |
| tsf | Triangle Strip Forward |
| tv | Translate by the vector |
| tx | Translate in X |
| ty | Translate in Y |
| tz | Translate in Z |
| units | Sets the units for values within a scope |
| v | A vertex |
| DSG Token | Description |
|---|---|
| corner_radius | The maximum allowable corner radius for a milled pocket |
| depth | The depth of a flat bottomed pocket |
| hole | A cylindrical hole feature |
| island | Where not to cut in a pocket feature. It has an outer contour and a list of subfeatures |
| A milling feature with a given bottom surface, an outer contour, a list of islands, and a list of subfeatures | |
| refplane | An oriented plane which describes an access direction. It has a list of transforms for orienting the XY-plane in space and a list of features. |
| taper_angle | The angle to be applied to the side walls of a feature in making molds for injection molding |
| SIF_DSG | Header stating that this a SIF DSG type file |
body , body_decl , body_decl_list , body_def , body_inst , body_inline , body_list , boundary_1d , boundary_1d_def , boundary_1d_inline , boundary_1d_inst , boundary_2d , boundary_2d_def , boundary_2d_inline , boundary_2d_inst , bspline_2d , circle , closed_1d_decl , closed_1d_decl_list , closed_2d_decl , closed_2d_decl_list , complete_segment , contour , contour_def , contour_inline , contour_inst , contour_list , contour_segment_list , face , facet , id , incomplete_segment , lump , lump_decl , lump_decl_list , lump_def , lump_inline , lump_inst , lump_list , lump_set , lump_set_decl , lump_set_decl_list , lump_set_def , lump_set_inline , lump_set_inst , mirror , nested_1d , nested_1d_decl , nested_1d_decl_list , nested_1d_def , nested_1d_inline , nested_1d_inst , nested_1d_list , nested_2d , nested_2d_decl , nested_2d_decl_list , nested_2d_def , nested_2d_inline , nested_2d_inst , nested_2d_list , open_1d_decl , open_1d_decl_list , open_2d , open_2d_decl , open_2d_decl_list , open_2d_list , part , path_def , path_inst , path_segment_list , rotate , scale , setting , setting_list , shell , shell_def , shell_inline , shell_inst , shell_list , surface , surface_def , surface_inline , surface_inst , transform , transform_list , translate , triangle , value , vertex
dsg_bottom , dsg_depth , dsg_feature , dsg_feature_list , dsg_hole , dsg_island , dsg_pocket , dsg_ref_plane , dsg_ref_plane_list
This page is maintained by
Jordan Smith
E-mail: jordans@cs.berkeley.edu
Last modified: 1/11/99
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