Section: Visualization Toolkit Infovis Classes
The input graph must be a forest (i.e. a set of trees, or a single tree); in the case of a forest, the input will be converted to a single tree by introducing a new root node, and connecting each root in the input forest to the meta-root. The tree is then laid out, after which the meta-root is removed.
The cones are positioned so that children lie in planes parallel to the X-Y plane, with the axis of cones parallel to Z, and with Z coordinate increasing with distance of nodes from the root.
.SECTION Thanks Thanks to David Duke from the University of Leeds for providing this implementation.
To create an instance of class vtkConeLayoutStrategy, simply invoke its constructor as follows
obj = vtkConeLayoutStrategy
obj
is an instance of the vtkConeLayoutStrategy class.
string = obj.GetClassName ()
int = obj.IsA (string name)
vtkConeLayoutStrategy = obj.NewInstance ()
vtkConeLayoutStrategy = obj.SafeDownCast (vtkObject o)
obj.SetCompactness (float )
- Determine the compactness, the ratio between the
average width of a cone in the tree, and the
height of the cone. The default setting is 0.75
which (empirically) seems reasonable, but this
will need adapting depending on the data.
float = obj.GetCompactness ()
- Determine the compactness, the ratio between the
average width of a cone in the tree, and the
height of the cone. The default setting is 0.75
which (empirically) seems reasonable, but this
will need adapting depending on the data.
obj.SetCompression (int )
- Determine if layout should be compressed, i.e. the
layout puts children closer together, possibly allowing
sub-trees to overlap. This is useful if the tree is
actually the spanning tree of a graph. For "real" trees,
non-compressed layout is best, and is the default.
int = obj.GetCompression ()
- Determine if layout should be compressed, i.e. the
layout puts children closer together, possibly allowing
sub-trees to overlap. This is useful if the tree is
actually the spanning tree of a graph. For "real" trees,
non-compressed layout is best, and is the default.
obj.CompressionOn ()
- Determine if layout should be compressed, i.e. the
layout puts children closer together, possibly allowing
sub-trees to overlap. This is useful if the tree is
actually the spanning tree of a graph. For "real" trees,
non-compressed layout is best, and is the default.
obj.CompressionOff ()
- Determine if layout should be compressed, i.e. the
layout puts children closer together, possibly allowing
sub-trees to overlap. This is useful if the tree is
actually the spanning tree of a graph. For "real" trees,
non-compressed layout is best, and is the default.
obj.SetSpacing (float )
- Set the spacing parameter that affects space between
layers of the tree. If compression is on, Spacing is the
actual distance between layers. If compression is off,
actual distance also includes a factor of the compactness
and maximum cone radius.
float = obj.GetSpacing ()
- Set the spacing parameter that affects space between
layers of the tree. If compression is on, Spacing is the
actual distance between layers. If compression is off,
actual distance also includes a factor of the compactness
and maximum cone radius.
obj.Layout ()
- Perform the layout.