GMS:Creating and Editing 3D Grids: Difference between revisions
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{{3D Grid links}} | {{3D Grid links}} | ||
=== Creating 3D Grids === | === Creating 3D Grids === | ||
Two techniques are available for creating 3D grids: the | Two techniques are available for creating 3D grids: the '''Create Grid''' command in the 3D Grid Module and the '''Map → 3D Grid''' command in the Map Module. When a 3D Cell Centered Grid is created two different viewing modes are available. | ||
=====Create Grid===== | =====Create Grid===== | ||
:A new grid can be created by selecting the | :A new grid can be created by selecting the '''Create Grid''' command from the ''Grid'' menu. This command brings up the ''Create Grid'' dialog. The options in the dialog are as follows: | ||
:'''Origin, Length, Rotation''' – By default, the rows and columns of [[GMS:2D Grid Module|2D grids]] are aligned with the x and y axes. However, grids can be rotated about the z-axis, if desired. Thus, the information needed to determine the overall size and location of the grid is the xy coordinates of the lower left corner of the grid (the lower left corner prior to rotation), the length of the grid in the x and y directions, and the rotation angle. The xy coordinates of the origin are entered in the Origin edit fields, the dimensions are entered in the Length fields, and the angle of rotation is entered in the field entitled Rotation about Z-axis. | :'''Origin, Length, Rotation''' – By default, the rows and columns of [[GMS:2D Grid Module|2D grids]] are aligned with the x and y axes. However, grids can be rotated about the z-axis, if desired. Thus, the information needed to determine the overall size and location of the grid is the xy coordinates of the lower left corner of the grid (the lower left corner prior to rotation), the length of the grid in the x and y directions, and the rotation angle. The xy coordinates of the origin are entered in the Origin edit fields, the dimensions are entered in the Length fields, and the angle of rotation is entered in the field entitled Rotation about Z-axis. | ||
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:'''Number of Cells''' – The total number of cells in each direction (number of rows or columns) can be defined by explicitly entering a number or by entering a base cell size and a limit cell size. The base and limit cell size options are used when a bias other than 1.0 is specified. The base cell size is the size of the first cell in the sequence. The cells are then generated by altering the cell size according to the bias until the limit cell size is reached. The remainder of the cells are constructed using the limit cell size. | :'''Number of Cells''' – The total number of cells in each direction (number of rows or columns) can be defined by explicitly entering a number or by entering a base cell size and a limit cell size. The base and limit cell size options are used when a bias other than 1.0 is specified. The base cell size is the size of the first cell in the sequence. The cells are then generated by altering the cell size according to the bias until the limit cell size is reached. The remainder of the cells are constructed using the limit cell size. | ||
:'''Type and Orientation''' – The controls at the bottom of the Create Grid dialog are used to define the type and orientation of the grid. The user can specify whether the grid should be a mesh-centered grid or a cell-centered grid. The orientation of the ij axes with respect to the XY axes can also be specified. | :'''Type and Orientation''' – The controls at the bottom of the ''Create Grid'' dialog are used to define the type and orientation of the grid. The user can specify whether the grid should be a mesh-centered grid or a cell-centered grid. The orientation of the ij axes with respect to the XY axes can also be specified. | ||
=====Map → 3D Grid===== | =====Map → 3D Grid===== | ||
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:If one or more refine points are defined in the conceptual model, the number of rows and columns in the grid will be automatically determined when the grid is created. Thus, these fields cannot be edited by the user and will be dimmed. If refine points are not defined, the number of rows and columns must be entered. | :If one or more refine points are defined in the conceptual model, the number of rows and columns in the grid will be automatically determined when the grid is created. Thus, these fields cannot be edited by the user and will be dimmed. If refine points are not defined, the number of rows and columns must be entered. | ||
:When refine points are specified the user must enter the Base size, Bias and Max size. The base size is the size the user wants the cell to be right at the refine point. The Max size is the largest size that the user would like the cells to be in the entire grid. The bias determines how quickly the cell size will vary as they move away from the refine point. If using a bias of 1.1 then the row next to the refine point will be 1.1 times the base size. The next row will be 1.1 size the previous row. | :When refine points are specified the user must enter the ''Base size'', ''Bias'' and ''Max size''. The ''base size'' is the size the user wants the cell to be right at the refine point. The ''Max size'' is the largest size that the user would like the cells to be in the entire grid. The ''bias'' determines how quickly the cell size will vary as they move away from the refine point. If using a bias of 1.1 then the row next to the refine point will be 1.1 times the ''base size''. The next row will be 1.1 size the previous row. | ||
=== Editing 3D Grids === | === Editing 3D Grids === | ||
