GMABOUT

Displays status information about GeoMESH.

GMESH

Generates a terrain mesh of triangles using Constrained Delauney Triangulation. Input: AutoCAD POINT elements (terrain points) and optionally AutoCAD LINE elements (constraints) are required. Constraints are used to define forced edges to which the terrain mesh will be constrained.

GMCONTOUR

Creates contour lines. Input: GeoMESH mesh elements are required. Using the system variable CWRITEMODE contour lines are drawn as AutoCAD LINE, 3DPOLY or 3DPOLY (spline) elements. With CBASE the base altitude is set and with CINCR the increment of the contour lines.

GMISOCONTOUR

Creates contour lines. Input: GeoMESH mesh elements are required. Using the system variable CWRITEMODE contour lines are drawn as AutoCAD LINE, 3DPOLY or 3DPOLY (spline) elements. With CBASE the base altitude is set and with CINCR the increment of the contour lines.

GMSECTION

Generates a terrain section to an existing terrain mesh. The terrain section is inserted as a block in the x-y plane of the current UCS. Input: GeoMESH mesh elements and afterward decurved 3DPOLY elements are required.

GMTEXTURE

Applies an image on a terrain mesh. The image is always projected orthogonally onto the terrain mesh, regardless of the chosen coordinate system. Input: GeoMESH mesh elements and afterward one AutoCAD IMAGE element is required. Only one image can be applied per command operation. Set the AutoCAD system variable FRAME or IMAGEFRAME to 0 to make the image frames invisible for a natural view of the generated terrain simulation.

GMBORDER

Draws the border line of a terrain mesh in a separate GeoMESH layer. Input: GeoMESH mesh elements are required.

GMSURFACE

Calculates the area of the surface of a terrain mesh. Input: GeoMESH mesh elements are required.

GMVOLUME

Calculates the volume between two terrain meshes. Input: GeoMESH mesh elements are required, first the TOP mesh and second the BOTTOM mesh. VOLPREC specifies the accuracy of volume calculation. If VOLDRAW is set to ON, the resulting volume body is drawn on a separate GeoMESH layer.

GM3DFACE2MESH

Converts 3DFACE elements to GeoMESH mesh elements. Input: 3DFACE elements are required.

GMESH2POINT

Generates terrain points from 3DFACE elements. Input: 3DFACE elements are required. 3DFACE elements must be triangles.

GMLINE2PLINE

Converts a group of arbitrary AutoCAD LINE elements into a group of joined AutoCAD 3DPOLY elements. Input: AutoCAD LINE elements are required. The results are always drawn to the current layer. The selected objects will be not erased.

GMXYZIN

Reads terrain points from an text file. File extension 'xyz' obliged. File format: x coordinate, y coordinate, z coordinate. As delimiter allowed: ':', ';', ',', or ' '. Any line beginning with '#' is treated as a comment line.

GMLASIN

Reads terrain points from an LAS file. File extension 'las' obliged. Supported file format: Version 1.0, 1.1, 1.2, 1.3 and 1.4. Note: GMLASIN read only the x, y, and z coordinates of any data record. For more information please visit: https://www.asprs.org.

GMSETVAR

Lists or changes the values of GeoMESH system variables. ?: Lists all GeoMESH system variables in the drawing and their current settings. Enter GeoMESH system variables on the command line: GMSET+"variable name".

GMSETCBASE

GeoMESH System Variable CBASE (GMSETVAR -> CBASE): Contains the base altitude for contour lines and colored contour line patterns. Any real value allowed. Default value is 0.0000.

GMSETCINCR

GeoMESH System Variable CINCR (GMSETVAR -> CINCR): Contains the altitude increment (contour lines) or the increment of the color gradation (contour line patterns). Any positiv real value unequeal zero allowed. Default value is 1.0000.

GMSETCOLORSCHEME

GeoMESH System Variable COLORSCHEME (GMSETVAR -> COLORSCHEME): Contains the color scheme for contour line patterns of the command GMISOCONTOUR. COLORSCHEME is a string of maximum 40 color codes. Any color code has three characters and is defined like the AutoCAD Color Index (ACI) of the AutoCAD command COLOR. Any integer value between 1 and 255 allowed. Default value is '001002003004005006'. Input 'default' to reset COLORSCHEME.

GMSETCWRITEMODE

GeoMESH System Variable CWRITEMODE (GMSETVAR -> CWRITEMODE): If CWRITEMODE is set to 0, contour lines of the command GMCONTOUR are drawn using AutoCAD LINE elements. Set to 1 GeoMESH draws contour lines using AutoCAD 3DPOLY elements and a value of 2 causes additionally the generation of splines. Default value is 1.

GMSETDETECTHOLE

GeoMESH System Variable DETECTHOLE (GMSETVAR -> DETECTHOLE): If DETECTHOLE is set to 0, GMESH produces a convex-hull. Set to 1, GMESH removes all outer triangles until a boundary defined by constraints. Set to 2, GMESH remove outer triangles and automatically detected holes. Default value is 0.

GMSETISO3DMODE

GeoMESH System Variable ISO3DMODE (GMSETVAR -> ISO3DMODE): If ISO3DMODE is set to OFF, colored contour line patterns of the command GMISOCONTOUR are drawn in x-y-plane with a constant z coordinate of CBASE. Default value is OFF.

GMSETVOLDRAW

GeoMESH System Variable VOLDRAW (GMSETVAR -> VOLDRAW): If VOLDRAW is set to ON, the volume body of the command GMVOLUME is drawn to a separate GeoMESH layer. The default value is OFF.

GMSETVOLPREC

GeoMESH System Variable VOLPREC (GMSETVAR -> VOLPREC): Contains the precision value for calculating the volume between to terrain meshes of the command GMVOLUME. Any positive integer between 10 and 1000 is allowed. The default value is 100.