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| {{TIN links}} | | {{TIN links}} |
| '''TIN files''' are used for storing Triangulated Irregular Networks. The TIN file format is shown below and a sample file is shown after. The TIN file format can be used to import a simple set of XYZ coordinates since the triangle information (beginning with the TRI card) does not need to be present. If there is a file of XYZ coordinates, only add the TIN, BEGT, and VERT nv cards to the top of the file and the ENDT card at the end.
| | TIN files are used for storing Triangulated Irregular Networks. The TIN file format is shown below and a sample file is shown after. The TIN file format can be used to import a simple set of XYZ coordinates since the triangle information (beginning with the TRI card) does not need to be present. If there is a file of XYZ coordinates, only add the TIN, BEGT, and VERT nv cards to the top of the file and the ENDT card at the end. |
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| <pre> | | <pre> |
TIN files are used for storing Triangulated Irregular Networks. The TIN file format is shown below and a sample file is shown after. The TIN file format can be used to import a simple set of XYZ coordinates since the triangle information (beginning with the TRI card) does not need to be present. If there is a file of XYZ coordinates, only add the TIN, BEGT, and VERT nv cards to the top of the file and the ENDT card at the end.
TIN /* File type identifier */
BEGT /* Beginning of TIN group */
TNAM name /* Name of TIN */
TCOL id /* TIN material id */
VERT nv /* Beg. of vertices */
x1 y1 z1 lf1 /* Vertex coords. */
x2 y2 z2 lf2
.
.
.
xnv ynv znv lfnv
TRI nt /* Beg. of triangles */
v11 v12 v13 /* Triangle vertices */
v21 v22 v23
.
.
.
vnt1 vnt2 vnt3
ENDT /* End of TIN group */
Sample TIN File:
TIN
BEGT
TNAM Aspen
TCOL 255 255 255
VERT 408
0.0 3.1 7.8 0
5.3 8.7 4.0 1
.
.
2.4 4.4 9.0 1
TRI 408
5 1 4
4 1 2
.
.
4 2 3
ENDT
Cards used in the TIN file
| Card Type
|
TIN
|
| Card ID
|
3000
|
| Description
|
File type identifier. Must be on first line of file. No fields.
|
| Required
|
YES
|
| Card Type
|
BEGT
|
| Card ID
|
3000
|
| Description
|
Marks the beginning of a group of cards describing a TIN. There should be a corresponding ENDT card at a latter point in the file. No fields.
|
| Required
|
YES
|
| Card Type
|
TNAM
|
| Description
|
Provides a name to be associated with the TIN.
|
| Required
|
NO
|
| Format
|
TNAM name
|
| Sample
|
TNAM aspen
|
| Field
|
Variable
|
Value
|
Description
|
| 1
|
name
|
str
|
The name of the TIN.
|
| Card Type
|
TCOL
|
| Description
|
Defines a default color for the triangles of the TIN
|
| Required
|
NO
|
| Format
|
TCOL color_red color_green color_blue
|
| Sample
|
TCOL 255 255 255
|
| Field
|
Variable
|
Value
|
Description
|
| 1
|
color_red
|
0–255
|
The red color component of TIN triangles.
|
| 2
|
color_green
|
0–255
|
The green color component of TIN triangles.
|
| 3
|
color_blue
|
0–255
|
The blue color component of TIN triangles.
|
| Card Type
|
MAT
|
| Description
|
Associates a material id with the TIN. This is typically the id of the material which is below the TIN.
|
| Required
|
NO
|
| Format
|
MAT id
|
| Sample
|
MAT 3
|
| Field
|
Variable
|
Value
|
Description
|
| 1
|
id
|
+
|
The material ID.
|
| Card Type
|
VERT
|
| Description
|
Lists the vertices in the TIN
|
| Required
|
YES
|
| Format
|
VERT nv
x1 y1 z1 lf1
x2 y2 z2 lf2
.
.
xnv ynv znv lfnv
|
| Sample
|
VERT 4
0.0 3.1 7.8 0
5.3 8.7 4.0 1
2.4 4.4 9.0 1
3.9 1.2 3.6 0
|
| Field
|
Variable
|
Value
|
Description
|
| 1
|
nv
|
+
|
The number of vertices in the TIN
|
| 2–4
|
x,y,z
|
±
|
Coords. of vertex
|
| 5
|
lf
|
0,1
|
Locked / unlocked flag for vertex (optional). 0=unlocked, 1=locked. Repeat fields 2–5 nv times.
|
| Card Type
|
TRI
|
| Description
|
Lists the triangles in the TIN
|
| Required
|
NO ( a set of triangles can be generated from the vertices)
|
| Format
|
TRI nt
v11 v12 v13
v21 v23 v23
.
.
vnt1 vnt2 vnt3
|
| Sample
|
TRI 4
5 1 4
4 1 2
4 2 3
5 4 3
|
| Field
|
Variable
|
Value
|
Description
|
| 1
|
nt
|
+
|
The number of triangles in the TIN.
|
| 2–4
|
v1,v2,v3
|
+
|
Vertices of triangle listed in a counter-clockwise order. Repeat nt times.
|
| Card Type
|
ENDT
|
| Card ID
|
3000
|
| Description
|
Marks the end of a group of cards describing a TIN. There should be a corresponding BEGT card at a previous point in the file. No fields.
|
| Required
|
YES
|
