Knotwork Program

Page 3: Days 7 to 9

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Day 9: 14 Nov 2001


I didn't have much time today, so there's only one image. It shows the first of a new class of substances for making threads: SubstanceImage. These substances are simply based on images (earlier substances were based on code that computed the shape of and rendered the snippets; here the code just copies pictures that have been supplied). For this substance (SubstanceImageTrial, a subclass of SubstanceImage), I used two images: a "straight" section (which actually makes sort of an s-curve), and a "turn" section. These images are rotated to the correct orientation for whatever snippet I'm rendering, and have a mask that lets the background and lower snippets show through. I just threw together the two images in Painter; I haven't made any real effort to make them nice. SubstanceImage is currently rather bare-bones and I will probably be spending some time enhancing and expanding it (so that it's easy to subclass into useful substances). I've also been thinking that I should be rearranging the internals of the whole program a bit so as to make it easier on me in the future. Sadly, hours spent rearranging internals don't yield fun pictures...



Day 8: 13 Nov 2001


Just because I can, I used two separate PixelShaderImage instances: the background is "Disrupted Fractal Number 11" and the threads are "Europa". Aren't you happy I didn't use some other image for the black outline of the threads?



PixelShaderImage using "Europa."



A test of my new class, PixelShaderImage. This class is a PixelShader which takes its pixels from an image. In this image, I'm using my "Disrupted Fractal Number10" as the source for the color on the threads.



SubstanceEarly on a more involved pattern.



Day 7: 07 Nov 2001


Same pattern as Day7a1, but with an increase in pulliness.


I've added another parameter to SubstanceEarly, which I call "pulliness." The pulliness indicates how much to pull back a u-turn (sLLs or sRRs). The u-turns in the pattern above are at the center of the crosses and the corners of the image. (My apologies for the image quality.)


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