Animation History and Techniques. Week 9 :CCT370 – Introduction to Computer Visualization. Animation. Animate = “to give life to” Specify, directly or indirectly, how ‘thing’ moves in time and space Tools. Two main categories. Computer-assisted animation 2D & 2 1/2 D Inbetweening
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Week 9 :CCT370 – Introduction to Computer Visualization
Animator colors each pixel
Tell computer to “make movie about a dog”
John Randolph Bray'sColonel Heeza Lair.
Out of Bray’s studio
basically follows this
In Research labs
Still frame from Gumby animation by Hank Grebe and Dick Lundin, 1984.
Disney animators Ollie Johnston and Frank Thomas in their 1981 book
1. Straight Ahead
Animator start from first drawing in the scene and draw all subsequent frames until the end of scene.
Animator plans actions, draws a sequence of poses, in between frames etc.
http://www.youtube.com/watch?v=PptuB4WWttk7. Slow in and Out
3d keyframe comp. Systems uses spline interpolation to control the path of an object.
Has tendency to overshoot at extremes (small # of frames).
Hardware/Software are simply not enough, these principles are just as important tools too.
1. Congruence Principle
2. Apprehension Principle
May save words by showing things that would otherwise need many.
Externalize internal knowledge
I. Reduces the burden on memory and processing by off-loading.
II. Makes underlying structures and processes transparent.
4. Used carefully can facilitate comprehension, learning, memory, communication and inference
Graphics are not always effective. (text vs graphics)Advantage Graphics
The structure and content of the external representation should correspond to the desired structure and content of the internal representation.
Appear to be effective for expressing processes ie. Weather patterns, circuit diagrams, or circulatory systems etc.
Compelling and attractiveAnimation
Interactivity versus Animation
Prediction versus Animation
Why the confusion?
The structure and content of the external representation should be readily and accurately perceived and comprehended.
Animation Test Harness
6. Manage complexity through overlays