User Manual

2DView
file as a string file or paste the string. Place the cursor near
the polygon - use GoTo if it is difficult to select a particular
polygon from several in the blast.
In the Edit menu, select Make Region From Nearest
Polygon. This will create a region at the same position as
the polygon. A form will be displayed to enter a name for
the region, the separation between points (resolution) and
the specific gravity of the rock. The name can be used to
identify different regions. A resolution of about one
quarter of the distance between blast holes will give
reasonable results in minimum time, depending on the size
of the region. The rock density is used in the energy
distribution calculation.
The region can be removed at this stage by clicking
[Cancel], or any region can be removed by placing the
cursor near it and pressing [Backspace].
Multiple regions can be created from a single polygon, and
then modified (see below).
Draw a Region
Draw a Region
A region can be drawn in the current view plane (see
Defining a View "Plane"). The drawing method is similar
to a polygon, but allows sides to cross over.
To draw a region, [click] on the [Start…] button on the
toolbar. Place the cursor at the start position (note the east,
north and level coordinates), [click] or press [Enter] for the
first vertex, then move the cursor to the other vertices and
222 JKSimBlast