摘要

About this image

I made this animation Cuddlyable3 15:36, 13 March 2007 (UTC) The Koch curve, in its fully (infinitely) iterated form is not a line that anyone has ever seen! That is to say, it is not like any of the lines that we are familiar with in Euclidean geometry because it somehow spans a finite distance while being infinitely long. The cross-section of an ordinary 2-D line is a point, but the cross-section of the Koch curve would have to be a probability distribution. That makes displaying the Koch curve challenging and we may need to rethink what we mean by aliasing error. The quantising imposed to make this animation is:

• Resolution: 200 x 100 pixels
• Colours: Just 2 i.e. monochrome
• Time: 10 frames that recycle at 10 frames/second

Each of the above is a potential source of aliasing error, but I think the dominant cause of comments about this is the restricted colour scale. Any pixel that the Koch "distribution" touches, no matter how slightly, is painted black. It is that simple.

Other details of this animation:

• the line actually drawn is first described numerically by 4097 points i.e. a it is a highly developed but not infinite Koch curve. This model exceeds the display resolution so much that I am sure that further Koch iteration would make no difference.
• the points are joined in order by the Bresenham line-drawing algorithm. At this scale I think I would have got exactly the same result by merely plotting the points because there is no line span long enough for the B. algorithm to paint intermediate points, but now you know what I told the computer to do.
• the animation was assembled using The Gimp software into a .gif file of only 4 331 bytes.

Finally, I judiciously panned the view of the sequence so the last frame smoothly recycles to the first frame i.e. the center of the curve seems to remain still. Although that gives a nice subjective effect, it may encourage a misinterpretation that forms are being emitted from the center. What you see is really just a zoom and pan view of a strange but static "self-similar" object.Cuddlyable3 19:14, 7 May 2007 (UTC)

^I got rid of the deprecated tag, and I'll add this tag. Plus, nominated for featured.Temperal^xy 19:12, 6 May 2007 (UTC)

See my Discussion page for some variations of this animation. Cuddlyable3 19:07, 2 June 2007 (UTC)

许可协议

我，本作品著作权人，释出本作品至公有领域。这适用于全世界。 在一些国家这可能不合法；如果是这样的话，那么： 我无条件地授予任何人以任何目的使用本作品的权利，除非这些条件是法律规定所必需的。