Changeset 4736
- Timestamp:
- Sep 24, 2007, 10:58:21 AM (18 years ago)
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anuga_core/documentation/user_manual/anuga_user_manual.tex
r4705 r4736 106 106 governing equation using a finite-volume method. 107 107 108 \anuga also incorporates a mesh generator %, called \code{pmesh}, 108 \anuga also incorporates a mesh generator %, called \code{graphical 109 %mesh generator}, 109 110 that 110 111 allows the user to set up the geometry of the problem interactively as … … 930 931 rectangular grid, the technique used for this example involves 931 932 building mesh structures inside polygons specified by the user, 932 using a mesh-generator referred to as \code{pmesh}.933 934 In its simplest form, \code{pmesh}creates the mesh within a single933 using a mesh-generator. 934 935 In its simplest form, the mesh-generator creates the mesh within a single 935 936 polygon whose vertices are at geographical locations specified by 936 937 the user. The user specifies the \emph{resolution}---that is, the … … 954 955 tags appropriate to the configuration being modelled. 955 956 956 In addition, \code{pmesh}provides a way to adapt to geographic or957 In addition, the mesh-generator provides a way to adapt to geographic or 957 958 other features in the landscape, whose presence may require an 958 959 increase in resolution. This is done by allowing the user to specify … … 967 968 %\end{figure} 968 969 969 In its general form, \code{pmesh}takes for its input a bounding970 In its general form, the mesh-generator takes for its input a bounding 970 971 polygon and (optionally) a list of interior polygons. The user 971 972 specifies resolutions, both for the bounding polygon and for each of 972 the interior polygons. Given this data, \code{pmesh}first creates a973 the interior polygons. Given this data, the mesh-generator first creates a 973 974 triangular mesh with varying resolution. 974 975 … … 1514 1515 (maximal area for any triangle in the mesh) and the minimal angle 1515 1516 allowable in any triangle. The user can specify a number of internal 1516 polygons within each of which a separate mesh is to be created, 1517 generally with a smaller resolution. \code{interior_regions} is a 1518 paired list containing the interior polygon and its resolution. 1519 Additionally, the user specifies a list of boundary tags, one for 1520 each edge of the bounding polygon. 1517 polygons within each of which the resolution of the mesh can be 1518 specified. \code{interior_regions} is a paired list containing the 1519 interior polygon and its resolution. Additionally, the user specifies 1520 a list of boundary tags, one for each edge of the bounding polygon. 1521 1521 1522 1522 \textbf{WARNING}. Note that the dictionary structure used for the … … 1958 1958 This function is used to assign values to individual quantities given 1959 1959 a regional tag. It is similar to \code{set\_quantity}. 1960 For example, if in pmesha regional tag of 'ditch' was1960 For example, if in the mesh-generator a regional tag of 'ditch' was 1961 1961 used, set\_region can be used to set elevation of this region to 1962 1962 -10m. X is the constant or function to be applied to the quantity, … … 3605 3605 3606 3606 3607 \section{ pmeshGUI}3607 \section{Graphical Mesh Generator GUI} 3608 3608 The program \code{graphical\_mesh\_generator.py} in the pmesh module 3609 3609 allows the user to set up the mesh of the problem interactively. … … 3611 3611 automatically generated. 3612 3612 3613 Pmesh will let the user select various modes. The current allowable 3614 modes are vertex, segment, hole or region. The mode describes what 3615 sort of object is added or selected in response to mouse clicks. When 3616 changing modes any prior selected objects become deselected. 3613 Graphical Mesh Generator will let the user select various modes. The 3614 current allowable modes are vertex, segment, hole or region. The mode 3615 describes what sort of object is added or selected in response to 3616 mouse clicks. When changing modes any prior selected objects become 3617 deselected. 3617 3618 3618 3619 In general the left mouse button will add an object and the right
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