![]() | Necker Applet (below) doesn't work even though you installed Java? |
Run the Necker Web-Start Application instead. | |
This downloads a jnlp (Java Web Start) file that tells Java how to run the Necker outside of your browser. | |
See my Java Web Start notes. |
Gamelan Staff Pick (Educational), October 1996
JARS TOP 5%, September 1996
(S/N A100924-9)
Net-mom Approved, June 1998
The Necker Cube is named after the Swiss crystallographer Louis Albert Necker, who in the mid-1800's saw cubic shapes spontaneously reverse in perspective.
The human mind perceives the 2-dimensional shadow of a cube as a 3-dimensional object, but the 2-D image doesn't distinguish the front and back faces. You can perceive either face as being in front.
The Animated Necker Cube applet forces you to periodically switch your perception of the cube. It does this by moving images horizontally and vertically through the cube in a mutually inconsistent way.
These people have done it (web pages listed in chronological order):