Geometry Explorer Help
Using the View Menu: Animation of Objects
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A very nice way to visualize certain geometric objects is to animate
their motion. Geometry Explorer has the capability of animating
most any object that is constructed (e.g. points freely moving in the
plane; points
moving along curvilinear objects such as lines, rays, segments,
arcs, and
circles; points on area objects; parameter values changing continuously
or
discretely) There are five menu items in the animate group
that control animation:
Animate Object:
To animate an object, first select the object (at which time the menu
item
"Animate Object..." will be activated) and then choose "Animate
Object..."
from the View menu. (Or you can right-click on the object
(Control-click for a Mac) and select "Start Animating from the popup
menu.)
When animating a point on a linear object (line,ray,segment, or filled
polygon) the point
moves from the initial point created on the object toward the second
point
defining the linear object. For example, in the figure below segment AB
was created by first creating point A and then dragging to point B.
Point
C was then attached to the segment. If we now animate point C it will
move
toward point B at a constant rate.
When animating a point on a circle (or arc), or on a filled circle or
arc, the point will
move around the circle (arc) at a
constant
rate (equal to the rate of an animated point on a linear object).
When animating a point that is independently defined, the point will
move at random around the screen.
When animating a parameter , the value of that parameter will change at
a fixed rate. The parameter may be set to change continuously
from one value to the next, or may be set to change in discrete
units. The way a parameter changes can be set using the
Properties Dialog, which is found under the Edit menu.
Speed Up Animation:
Use this option to increase the rate at which the animation is being
carried out.
Slow Down Animation:
Use this option to decrease the rate at which the animation is being
carried out.
Stop All Animators:
This option will stop all currently defined animations.
Show Animation Panel:
Clicking on this menu item will bring up a dialog box where currently
selected animated objects can be adjusted as to animation speed and
direction.