Triangulated Irregular Network (TIN) | Home |

The TIN model represents a surface as a set of contiguous, non-overlapping triangles. Within each triangle the surface is represented by a plane. The triangles are made from a set of points called mass points.

To add TIN object into a drawing use following functions:

Function | Meaning |
---|---|

lcBlockAddTIN | Adds TIN object into a drawing |

lcTIN_AddPoint | Used to pre-define all TIN points (before to call lcBlockAddTIN) |

TIN object functions:

Function | Meaning |
---|---|

lcTIN_AddPoint | Adds new point |

lcTIN_PtypeGetByName | Retrieves point type by its name |

lcTIN_PtypeGetFirst lcTIN_PtypeGetNext |
Used to sequentially retrieve all point types |

lcTIN_PntGetFirst lcTIN_PntGetNext |
Used to sequentially retrieve all points |

lcTIN_PntGetNear | Finds a point, nearest to the specified X,Y coordinates |

lcTIN_PntDelDup | Deletes duplicate points |

lcTIN_TriGetFirst lcTIN_TriGetNext |
Used to sequentially retrieve all triangles |

lcTIN_TriUpdate | Updates triangles after editing point position |

lcTIN_Bnd | Generates a boundary |

lcTIN_BndGetPoint | Retrieves boundary point |

lcTIN_Triangulate | Triangulate points within a boundary |

lcTIN_Isolines | Generates isolines |

lcTIN_IsoGetFirst lcTIN_IsoGetNext |
Used to sequentially retrieve all isolines |

lcTIN_GetZ | Retrieves Z-coordinate for specified X,Y position |

lcTIN_ColorFill | Generates color filling (raster image) |

lcTIN_Save | Write TIN model or points into external file |

lcTIN_InterLine | Defines intersection line |

lcTIN_InterGetPoint | Retrieves intersection points |

There are list of commands to add TIN object into a drawing:

Value | Meaning |
---|---|

LC_CMD_TIN_LOAD | Creates new TIN object by loading TIN model from a file (*.tin) |

LC_CMD_TIN_LOADPT | Creates new TIN object by loading TIN points from a file (*.csv) |

LC_CMD_TIN_ADDPT | Creates new TIN object by adding points on-screen |

There are list of commands to work with

Value | Meaning |
---|---|

LC_CMD_TIN_PROPS | Opens a dialog "TIN properties" |

LC_CMD_TIN_PTYPES | Opens a dialog "Point types" |

LC_CMD_TIN_EDITPT | Picks and edits points |

LC_CMD_TIN_ADDPT | Adds new TIN points on-screen (CmdParam = 1) |

LC_CMD_TIN_DELPT | Picks and deletes points |

LC_CMD_TIN_BNDDELPT | Deletes all points within a boundary |

LC_CMD_TIN_DELPTDUP | Opens a dialog "Delete duplicate points" |

LC_CMD_TIN_DELTRALL | Delete all triangles. (CmdParam: 1-no messages |

LC_CMD_TIN_DELTR | Picks and deletes triangles |

LC_CMD_TIN_BNDDELTR | Deletes all triangles within a boundary |

LC_CMD_TIN_SWAPTR | Picks a common edge of two triangles and swap their edge if possible |

LC_CMD_TIN_BNDAUTO | Creates a boundary by edge distance |

LC_CMD_TIN_BND | Creates a boundary by picking TIN points |

LC_CMD_TIN_BNDEDIT | Edits exist boundary on-screen |

LC_CMD_TIN_BNDCLEAR | Deletes a boundary |

LC_CMD_TIN_BNDTRANG | Triangulates points within a boundary. (CmdParam: 1 - stop after each triangle |

LC_CMD_TIN_GENISO | Call dialog "Generate TIN isolines" |

LC_CMD_TIN_GENFILL | Call dialog "Generate TIN filling" |

LC_CMD_TIN_SAVE | Save TIN object or only TIN points in a file |

LC_CMD_TIN_BNDSAVE | Save a bounded part of TIN object or TIN points in a file |

LC_CMD_TIN_Z | Switches on/off current Z-coordinate of cursor position (displayed near cursor) |

LC_CMD_TIN_ZOOM | Zoom on extents of TIN object |

LC_CMD_TIN_DELETE | Deletes TIN object from a memory. See also lcBlockDeleteEnt |

TIN object has properties and functions derived from base class and the following specific properties:

Property | Type | Access | Meaning |
---|---|---|---|

LC_PROP_TIN_NAME | string | RW | TIN name |

LC_PROP_TIN_DESCR | string | RW | Comment |

LC_PROP_TIN_FILENAME | string | R | Name of source file (from where TIN was loaded) |

LC_PROP_TIN_NPTYPES | int | R | Number of point types |

LC_PROP_TIN_NPOINTS | int | R | Number of points |

LC_PROP_TIN_NTRIANS | int | R | Number of triangles |

LC_PROP_TIN_NBNDPTS | int | R | Number of boundary points |

LC_PROP_TIN_NISOLINES | int | R | Number of isolines |

LC_PROP_TIN_HASCFILL | bool | R | Has color filling |

Extents |
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LC_PROP_TIN_XMIN LC_PROP_TIN_YMIN LC_PROP_TIN_ZMIN |
float | R | Minimal X, Y, Z coordinate |

LC_PROP_TIN_XMAX LC_PROP_TIN_YMAX LC_PROP_TIN_ZMAX |
float | R | Maximal X, Y, Z coordinate |

LC_PROP_TIN_DX LC_PROP_TIN_DZ LC_PROP_TIN_DZ |
float | R | Length along X, Y, Z axis |

Visibility |
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LC_PROP_TIN_VIEWPT | bool | RW | Points |

LC_PROP_TIN_VIEWPTN | bool | RW | Point type name |

LC_PROP_TIN_VIEWPTI | bool | RW | Point index |

LC_PROP_TIN_VIEWPTZ | bool | RW | Point Z-coordinate |

LC_PROP_TIN_VIEWTR | bool | RW | Triangles |

LC_PROP_TIN_VIEWCF | bool | RW | Color filling |

LC_PROP_TIN_VIEWTRI | bool | RW | Index of triangle |

LC_PROP_TIN_VIEWTRV | bool | RW | Triangle's waterflow vector |

LC_PROP_TIN_VIEWBND | bool | RW | Boundary line |

LC_PROP_TIN_VIEWBNDI | bool | RW | Index of boundary vertex |

LC_PROP_TIN_VIEWISO | bool | RW | Isolines |

LC_PROP_TIN_VIEWISOH | bool | RW | Heights of isolines |

LC_PROP_TIN_VIEWZ | bool | RW | Displays current Z-value near cursor, when user moves it |

Colors |
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LC_PROP_TIN_COLTR | int | RW | Color of triangle outline |

LC_PROP_TIN_COLTRI | int | RW | Color of triangle index |

LC_PROP_TIN_COLTRV | int | RW | Color of triangle normal vector |

LC_PROP_TIN_COLISO | int | RW | Color of isolines |

LC_PROP_TIN_COLISOB | int | RW | Color of bold isolines |

LC_PROP_TIN_COLISOW | int | RW | Color of water isolines |

LC_PROP_TIN_COLBND | int | RW | Color of boundary line |

LC_PROP_TIN_COLBNDP | int | RW | Color of boundary point |

Isolines |
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LC_PROP_TIN_ISOBASE | float | RW | Start Z-level. Default value is 0.0 |

LC_PROP_TIN_ISOSTEP | float | RW | Z step |

LC_PROP_TIN_ISOBOLD | int | RW | Step of bold isolines |

LC_PROP_TIN_ISOSPLINE | bool | RW | Spline isolines |

Color filling |
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LC_PROP_TIN_IMG_ZSTEP | float | RW | Z step. Defines a number of colors used for filling. Use 0.0 for full palette (256 colors) |

LC_PROP_TIN_IMG_PSIZE | float | RW | Pixel size (drawing units). This value determines the image size |

LC_PROP_TIN_IMG_NX | int | R | Image width (pixels) |

LC_PROP_TIN_IMG_NY | int | R | Image height (pixels) |

Properties of TIN point type (require a handle of point type)

Property | Type | Access | Meaning |
---|---|---|---|

LC_PROP_TINPTYPE_NAME | string | RW | Name of point type |

LC_PROP_TINPTYPE_DTEXT | string | RW | Text to be drawn near a point |

LC_PROP_TINPTYPE_COLOR | int | RW | Color of points (COLORREF) |

Properties of TIN point (require a handle of point)

Property | Type | Access | Meaning |
---|---|---|---|

LC_PROP_TINPNT_TYPE | handle | RW | Handle of point type |

LC_PROP_TINPNT_I | int | R | Index of point |

LC_PROP_TINPNT_X | float | RW | X coordinate |

LC_PROP_TINPNT_Y | float | RW | Y coordinate |

LC_PROP_TINPNT_Z | float | RW | Z coordinate |

LC_PROP_TINPNT_COLOR | int | R | Color of point (get from point type) |

LC_PROP_TINPNT_NAME | string | R | Point name (get from point type) |

LC_PROP_TINPNT_ONAME | string | RW | Point own name (overrides name of point type) |

LC_PROP_TINPNT_DESCR | string | RW | Point description |

Properties of TIN triangle (require a handle of triangle)

Property | Type | Access | Meaning |
---|---|---|---|

LC_PROP_TINTR_I | int | R | Index of triangle |

LC_PROP_TINTR_PT0 | handle | R | Handle of first point |

LC_PROP_TINTR_PT1 | handle | R | Handle of second point |

LC_PROP_TINTR_PT2 | handle | R | Handle of third point |

LC_PROP_TINTR_PT0X LC_PROP_TINTR_PT0Y LC_PROP_TINTR_PT0Z |
float | R | X, Y, Z coordinate of first point |

LC_PROP_TINTR_PT1X LC_PROP_TINTR_PT1Y LC_PROP_TINTR_PT1Z |
float | R | X, Y, Z coordinate of second point |

LC_PROP_TINTR_PT2X LC_PROP_TINTR_PT2Y LC_PROP_TINTR_PT2Z |
float | R | X, Y, Z coordinate of third point |

LC_PROP_TINTR_XC LC_PROP_TINTR_YC LC_PROP_TINTR_ZC |
float | R | X, Y, Z coordinate of center point |

LC_PROP_TINTR_NVX LC_PROP_TINTR_NVY LC_PROP_TINTR_NVZ |
float | R | X, Y, Z component of normal vector |

LC_PROP_TINTR_NANG | float | R | Angle of normal vector on XY plane |

LC_PROP_TINTR_XMIN LC_PROP_TINTR_YMIN LC_PROP_TINTR_ZMIN |
float | R | Minimal X, Y, Z coordinate of triangle |

LC_PROP_TINTR_XMAX LC_PROP_TINTR_YMAX LC_PROP_TINTR_ZMAX |
float | R | Maximal X, Y, Z coordinate of triangle |

LC_PROP_TINTR_DX LC_PROP_TINTR_DY LC_PROP_TINTR_DZ |
float | R | Length along X, Y, Z axis |

Properties of TIN isoline (require a handle of isoline)

Property | Type | Access | Meaning |
---|---|---|---|

LC_PROP_TINISO_Z | float | R | Z of isoline |

LC_PROP_TINISO_NVERS | int | R | Number of vertices |

LC_PROP_TINISO_IVER | int | RW | Index of isoline |

LC_PROP_TINISO_X | float | R | X of isoline vertex |

LC_PROP_TINISO_Y | float | R | Y of isoline vertex |

LC_PROP_TINISO_CLOSED | bool | R | Flag "closed isoline" |

Create TIN object from pre-defined points

Modify points of TIN object

Get intersection points

Retrieve objects