Triangle mesh
from command line: sngDMT
toolbar:
Function creates TIN from set of points. User has the option to
define breaklines.
Get coords from objects (for triangulation),
input points of POINT, LINE, 3DPOLYLINE or BLOCK-type objects or
external coords, are available. It is possible to apply a filter
(according to layer) on a object, that means only coords
of objects in these layers are used.
Sample of external coords
file:
1 787468.48 1146895.48
481.50
2 787461.44 1146878.30
482.40
3 787440.74 1146894.84
483.30
4 787434.12 1146878.53
484.20
Space must be delimiter.
Area for finding the coords,
it is possible to search through whole sketch, or the user can
select objects manually.
Breaklines
are sorted to soft and
hard. The soft ones only define the shape of
triangles, the hard ones
also guarantee non-smooth transition during contour creation. It is
possible to choose breaklines manually from the sketch, or from the
list of used layers. When option Layers is used, all objects from
selected layers are used. Usable objects for breaklines are Line
segments and 3D curves. Other objects will be ignored. Coordinates
of breakline edges are added to the set of points, used for
triangulation. If the breaklines are adjacent, they need to be
connected with joint vertex. Before the creation of TIN, a test of
breaklines geometry takes place. Found problems (crossing,
T-connection, overlapping) are fixed and written into error
log.
Skip TIN (Triangle mesh) is used for specification of an
area where no TIN will be made.
Exterior (2D/3D polyline)
defines outer edge. Interior (3D polylines only) is used to
define islets (holes).
Concave envelope of TIN, Remove outer triangles: When this
function is used, outer triangles are checked in loop to make sure
that none of them has side, longer than is set. The Factor
option is computationally faster.
Ignoring objects with Z=0,
applies to input set of points and breaklines.
Surface name:
Created object will contain this name.
Preview:
Rendering of TIN is done in a new window.
Note:
Creation of TIN is not suitable for overhangs, bridges, tunnels
etc.
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