animation/

animation_example.pro

includes main-level program

Example of using the animation classes.

Graphics hierarchy setup

An object graphics hierarchy is setup in the standard way:

  oview = obj_new('IDLgrView')

  omodel = obj_new('IDLgrModel')
  oview->add, omodel

  oorb = obj_new('orb', radius=0.9, color=[0, 0, 255])
  omodel->add, oorb

  olightmodel = obj_new('IDLgrModel')
  oview->add, olightmodel

  olight = obj_new('IDLgrLight', type=2, location=[1, 1, 1])
  olightmodel->add, olight

Animation hierarchy

A separate animation hierarchy is then built to represent the animations intended to run on the object graphics hierarchy. This hierarchy is rooted at a MGgrWindowAnimation (for interactive animations) or a MGgrImageSequenceAnimation (for creating a sequence of images):

oanimation = obj_new('MGgrWindowAnimation', dimension=[400, 400])

There are various other animators that can be children of the root that produce transformations, property changes, etc.

Using TransformAnimator to scale and rotate

A MGgrTransformAnimator represents a scaling, rotation, or translation transformation. Here we scale omodel down and then back up:

  oanimator1 = obj_new('MGgrTransformAnimator', target=omodel)
  for i = 0, 20 do begin
    oanimator1->addScale, 0.97, 0.97, 0.97
  endfor
  oanimation->addAnimator, oanimator1

  for i = 0, 20 do begin
    oanimator1->addScale, 1.02, 1.02, 1.02
  endfor

Then we rotate the olightmodel:

  oanimator2 = obj_new('MGgrTransformAnimator', target=olightmodel)
  for i = 0, 44 do begin
    oanimator2->addRotate, [0, 1, 0], 8
  endfor
  oanimation->addAnimator, oanimator2

Produce the animation

Finally, the animation is produced with:

  oanimation->draw, oview

Author information

Author: Michael Galloy, 2011

File attributes

Modification date:	Tue Jan 3 14:01:56 2012
Lines:	111
Docformat:	rst rst

Personal library of Michael Galloy
Contact me if you have enhancement requests or bug fixes.

idllib

Personal IDL library for M. Galloy