_zCircle
the set of points the complex plane that are equidistant from a given point
of the plane
inherits:
Element , zdrawCircle
defining instance attributes
- _center: the complex point on circle's center
- _cpoint: a complex point on circle circumference
- _hermitian: the hermitian matrix associated with the circle
- _radius: the circle's radius
- _radiusSquared: the square of the circle's radius
Methods defined in _zCircle
intialize attributes, with keywords arguments or defaults
Methods defined in Element
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.
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
Methods defined in zdrawCircle
send current position of circle's center position and radius based of the circle's
defining Hermitian matrix
the circle object is represented either by a convex polygon or as curve -
we take advantage of the cvisual frame object, assigning the drawing primitives to one
frame, so that further manipulation is of the frame, not the primtives themselves
export the scene's circles to PovRay SDL
Attributes
['color',
'initcolor',
'trace',
'level',
'texture',
'extend',
'povout',
'label',
'append',
'export',
'style',
'linewidth',
'precision',
'fixed',
'circle_type',
'O']
See
the source
for more information.