Puppet effect, Reshape effect – Adobe After Effects CS3 User Manual
Page 417
AFTER EFFECTS CS3
User Guide
412
Original (top left), and with variations of Polar Coordinates applied (bottom left and right)
Stu Maschwitz provides an example project that uses the Fractal Noise effect to create the corona of the Sun and then
uses the Polar Coordinates effect to wrap the line of noise around into a circle:
Interpolation
Specifies the amount of distortion. At 0%, no distortion occurs.
Type of Conversion
The conversion process to use:
•
Rect To Polar
Moves pixels by using (x,y) coordinates from each pixel as (r,
) coordinates. For example, an (x,y)
coordinate of (2,3) becomes a polar coordinate with a radius of 2 and a degree of 3. Horizontal lines distort into
circles, and vertical lines into radial lines.
•
Polar To Rect
Moves pixels by using the (r,
) coordinates from each pixel as the (x,y) coordinates. For example,
polar coordinates of radius 10 and 45˚ become (x,y) coordinates of (10,45).
Puppet effect
Use the Puppet effect to animate distortions of images to produce natural, lifelike motion.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
See also
“Animating with Puppet tools” on page 226
Reshape effect
The Reshape effect transforms one shape into another shape on the same layer, dragging the underlying image with
it. The image is distorted to fit the shape of the new area. You create or import up to three masks to define the area
you want to distort: the source mask, the destination mask, and the boundary mask (optional).
This effect works with 8-bpc and 16-bpc color.