Plotter Art
The pictures made here were all made several years ago by now, but I am rewriting the descriptions now.
The first group of pictures are flow fields. Each point on the picture has a direction assigned to it. This produces shape to a similar manner as tributaries form. A bunch of starting points are picked on a grid, and continuously follow the direction at each point they end up at. The resulting picture can be changed by manipulating the directions. For example, squaring a coordinate makes it always positive, locking the paths only increase that coordinate.
For the first picture the direction is decided purely with perlin noise. There are some zigzag artifacts due to the size of the steps taken.
This next picture has both the x and y directions squared, causing the lines to always move to the bottom left.
By squaring only one coordinate this picture has the lines go to the right.
Raising the x and y coordinates of the direction to a high odd power makes it follow cardinal directions.
This next picture reuses the squaring both coordinates trick, but after a change of basis. This causes the direction to by biased towards flowing in an inwards circle.
Changing between an inwards bias and an outwards bias depending on the distance from the center creates a stable ring around the middle.
Adding noise can make results that look noisy.
The change of basis operation can be based on another noise field to create a picture with a regionally varying bias.
I don’t actually remember what made this one happen. I think it was a similar change of basis based on perlin noise thing.
This one is just a squaring both coordinates thing again, but rotated to fit on the page different.
Now for a complete change of pace, my cat. This is based on a picture taken with a camera, and then dithered. Then a dot was created in each spot with a black pixel.
The remaining pictures are all variations on a Barnsley fern, or other tree fractal things.
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