AlToJt
Purpose
AlToJt translates Alias wire files to JT format files.
Description
| AlToJt [ options ] -i<input Wire file> -o<output Jt file> -f <scm file> | |
| -h | outputs online help, then exits |
| -f <scm> | specifies the name of the Alias User Option scm file (see below) |
| -g | converts the wire file in a single DirectModel (.jt) file |
| -l | creates a logfile (with .alias2jt extension) containing Alias to DirectModel translation messages |
| -p | creates a file (with .sg extension) containing an indented representation of the scene graph |
| -ta | tessellates all Alias surface geometry using accurate tessellator |
| -to | tessellates all Alias surface geometry using fast tessellator |
| -tl# | sets number of Alias tessellation LODs. # must be between [1,3] (default = 1) |
| -t <tol> | sets the tolerance for LOD 0 (in centimeters, default = 0.1) for Alias accurate or fast tessellator |
| -t1t<tol> | sets the tolerance for LOD 1 (in centimeters, default = 0.25) for Alias accurate or fast tessellator |
| -t2t<tol> | sets the tolerance for LOD 2 (in centimeters, default = 1.0) for Alias accurate or fast tessellator |
| -wc | outputs curves |
| -wi | outputs invisible entities |
| -wt | outputs templated entities |
| -ws | outputs layer symmetry (merged) |
| -wsu | outputs layer symmetry (unmerged) |
| -m0 | exports geometry type – polygon only |
| -m1 | exports geometry type – polygon and brep |
| -wx | brep type JtkXTBrep |
| -wb | brep type JtkBrep |
| -xs | doesn't output shaders |
| -xt | doesn't output textures |
| -xl | doesn't output lights |
| -e1g | organizes data first by geometry |
| -e1s | organizes data first by shader (default) |
| -e1l | organizes data first by layer |
| -e1b | organizes data first by SBD structure |
| -e2s | organizes data second by shader; does not work with e1g |
| -e2l | organizes data second by layer; does not work with e1g |
| -es | sorts data by name; works with either primary or secondary ordering by shader or layer. |
| -q | sews surfaces together |
| -s <scale> | specifies geometry scale factor (default = 1.0) |
| -u <image res> | specifies texture file image resolution used during 3D (solid or environment) texture conversion. Valid resolutions are 8 ... 8192. Default = 128. |
| Texture blending mode: | (see notes below) |
| -bmb | BLEND mode |
| -bmd | DECAL mode |
| -bmm | MODULATE mode |
| -bmr | REPLACE mode |
| Where: | |
| -i <infile> | specifies an Alias wire file to use as input. If not specified, input comes from stdin. |
| -o <outfile> | specifies a JT file to write output to. If it is not specified, the output is written to stdout. |
Texture blending mode
The texture blending mode options are only available through the AlToJt command line interface (no equivalent exists in the option window). They specify which texture blending mode will be used when exporting the file. The blending mode controls how the material color and the texture color of the part interact. Only one of the four options should be specified at a time. See table above.
If a blending mode is specified and a texture is mapped to the color channel, then both the material color and texture properties will be available in the JT file, and the blending mode will be set accordingly. If no blending mode is specified, no blending will be performed in the JT file, and only the texture will be set for the part.
Alias User Option (scm) file
The Alias User Option file is a text configuration file in a scheme format. A template is located in your local Alias installation under:
Program Files\Autodesk\Alias2010\Scheme\Modeling\dt_jt.v.scm.It contains all the configuration parameters with their description. This file lets systems administrators edit the export parameters (options) then specify the filename in the command line instead of the individual parameters. For example:
AltoJt.exe -f "r:\directory name\dt_jt.v.scm"This way the parameters can be changed while the command line always remains the same.
The file should be copied into a directory with write permission, and made writeable before editing.
The scheme format has simple editing rules:
All the characters or letters after a semi-colon are comments.
Each name-value pair for specifying a configuration parameter has the following syntax:
(ui-symbol "name" value)where "name" is a string that is always available in the scheme file. The possible values are displayed and explained in the comment above that line.
For example:
; this ui-symbol controls Create A Single File ; chose one of the following: ;#f = create multiple file, #t = create single JT file (ui-symbol "mo_eai_multi_file" #t)To create multiple files, you would simply edit the last line, replacing #t with #f.
LOD labels
Labels for the tessellation levels of detail (LODs) can be set through the scheme configuration file (described above), but not as individual command-line arguments.
If you are not using a configuration file, you can set the labels by setting these environment variables:
- ALIAS_JT_LOD0_LABEL (first LOD)
- ALIAS_JT_LOD1_LABEL (second LOD)
- ALIAS_JT_LOD2_LABEL (third LOD)
For example: ALIAS\_JT\_LOD0_LABEL=Fine
Allowed characters are letters (upper and lower case), numbers, underscore ("_") and white spaces.
Labels specified through the scheme configuration file override the environment variables.
Related Concepts
- JT export options