Element
the abstract class from which all PyGeo geometric objects derive
Methods defined in Element
intialization of the common attributes of geometric objects to default
values, overridden to the extent that avalable keyword arguemtns are provided
make all objects iterable, returning "self" in the simplest instance
length of the iterable assocaited with the object
method that is called on change events, calling reoutines to find current
position based on dependecies, current visibility status, etc.
the function called to recalculate an objects postion at a change event,
to be overridden in subclasses
each object has a 4x4 matrix associated with it, representing the object's axis of
rotation and translation from the origin. Needed for the implementation of the
Projection class. Set to the identity matrix by default.
test whether any Elements on which there is a dependency
have become 'null', i.e. not calculatable - .e.g, imaginary when
working within real space
check for change in visibiliy status and toggle
visibility as necessary, reset change flag to 0 on
effectuating change in visiblity
toggle the 'null' flag, indicating whether the current postion of the
object's position is visible - e.g. is real when working in real space
f
_setnull(self, to_null=True)
...
set object and the objects dependant on it to 'null' when
its position cannot be made visible- e.g. imaginary when working in real
space.
method to be overridden for objects needing an supplementary initiliazation routine after
the call to __init___
Routine to return Element to intial position.
Default is to run update routine
method to be overridden to erase loci of objects that are traceable
method to be overridden to erase curves traced by point objects
Attributes
['color',
'initcolor',
'trace',
'level',
'texture',
'extend',
'povout',
'label',
'append',
'export']
See
the source
for more information.