Adjusting line grid parameters
Each line grid is defined by means of:
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dimensions in individual directions,
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location of its origin (i.e. the insertion point),
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possible rotation,
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angles of obliqueness (for oblique line grid only),
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name,
Line grid type
The combo box at the bottom part of the dialogue selects the required grid type.
Line grid dimensions
Depending on the grid type, the dimensions are defined in Cartesian, spherical, or cylindrical co-ordinates.
There are two ways to define the individual "spans" and "storey heights":
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the user inputs the dimensions of individual "spans" and "storey heights",
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the user inputs the co-ordinates of individual line grid vertices (i.e. co-ordinates of end-points for individual "spans" and "storeys").
The approaches are independent for each direction. In other words, the user can specify the dimension of the grid in X and Y direction by means of "span" lengths and then use grid absolute co-ordinates for the definition of individual "storeys" (in the case of Cartesian type) or vice versa. Which approach will be used can be set in the combo box located above the table for each particular direction.
Another general rule is that:
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either each "span" and each " storey" of the line grid is defined explicitly,
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or a "span" or "storey" dimension is input only once and the number of repetition of this dimension is added (if "spans" or "storeys" of the same dimension are adjacent to each other).
The latter can be user for grid with repetitious "spans" and may significantly speed up the definition of the grid.
Insertion point and rotation
This point defines the location of the grid in the global co-ordinate system.
If required, the whole line grid may be rotated around the global Z-axis.
Name
The name serves for easy identification of individual line grids if more than one grid are defined.
Parameters of display style
The user can control the way the line grid is displayed on the screen.