Package topo :: Package patterns :: Module basic :: Class Disk

Class Disk

                                  object --+        
                                           |        
base.parameterizedobject.ParameterizedObject --+    
                                               |    
          base.patterngenerator.PatternGenerator --+
                                                   |
                                                  Disk

2D disk pattern generator.

An elliptical disk can be obtained by adjusting the aspect_ratio of a circular disk; this transforms a circle into an ellipse by stretching the circle in the y (vertical) direction.

The Gaussian fall-off at a point P is an approximation for non-circular disks, since the point on the ellipse closest to P is taken to be the same point as the point on the circle before stretching that was closest to P.

Nested Classes

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Inherited from base.parameterizedobject.ParameterizedObject: __metaclass__

Instance Methods

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function(self, params)
Function to draw a pattern that will then be scaled and rotated.

source code

Inherited from base.patterngenerator.PatternGenerator: __call__

Inherited from base.parameterizedobject.ParameterizedObject: __getstate__, __init__, __repr__, __setstate__, __str__, as_uninitialized, debug, defaults, force_new_dynamic_value, get_param_values, get_value_generator, inspect_value, message, print_param_values, script_repr, verbose, warning

Inherited from base.parameterizedobject.ParameterizedObject (private): _check_params, _instantiate_param, _set_name, _setup_params

Inherited from object: __delattr__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __setattr__

Class Methods

[hide private]

Inherited from base.parameterizedobject.ParameterizedObject: params, print_param_defaults

Class Variables

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aspect_ratio = <topo.base.parameterclasses.Number object at 0x...
Ratio of width to height; size*aspect_ratio gives the width of the disk.

size = Number(default= 0.5, doc= "Top to bottom height of the ...
Top to bottom height of the disk

smoothing = <topo.base.parameterclasses.Number object at 0x9da...
Width of the Gaussian fall-off

Inherited from base.patterngenerator.PatternGenerator: bounds, mask, offset, orientation, output_fn, position, scale, x, xdensity, y, ydensity

Inherited from base.parameterizedobject.ParameterizedObject: name, print_level

Properties

[hide private]

Inherited from object: __class__

Method Details

[hide private]

function(self, params)

source code

Function to draw a pattern that will then be scaled and rotated.

Instead of implementing __call__ directly, PatternGenerator subclasses will typically implement this helper function used by __call__, because that way they can let __call__ handle the scaling and rotation for them. Alternatively, __call__ itself can be reimplemented entirely by a subclass (e.g. if it does not need to do any scaling or rotation), in which case this function will be ignored.

Overrides: base.patterngenerator.PatternGenerator.function: (inherited documentation)

Class Variable Details

[hide private]

aspect_ratio

Ratio of width to height; size*aspect_ratio gives the width of the disk.

Value:

Number(default= 1.0, bounds= (0.0, None), softbounds= (0.0, 2.0), precedence= 0.31
, doc= "Ratio of width to height; size*aspect_ratio gives the width of the disk.")

size

Top to bottom height of the disk

Value:

Number(default= 0.5, doc= "Top to bottom height of the disk")

smoothing

Width of the Gaussian fall-off

Value:

Number(default= 0.1, bounds= (0.0, None), softbounds= (0.0, 0.5), precedence= 0.61
, doc= "Width of the Gaussian fall-off")