Lesson 6 of 10 · Shader patterns
The spiral
The vortex. Shapes falling to center.
In the last lesson you used the angle to make slices. Now you add the distance from the center, and the slices twist. They become a spiral.
Here is the trick: where before you had sin(ang * 3.), now you have sin(ang * 3. + dist * 6.). The distance pushes the angular pattern and curls it. More distance = more push = more twist.
Angle + distance. The curve that never ends.
ang + distThe angle gives you the direction. The distance tells you how far from the center. When you add them inside a
sin(), the radial stripes curve. It is the same trick you used with + T to rotate, but now instead of time, it is space doing the twisting.Change
6. to 12., tighter spiral. To 2., loose spiral. Add - T at the end to make it spin. Hint: sin(ang * 3. + dist * 6. - T)Freebie
SPECTRUM
Find// replace this in the code and swap that line for this:col = iri(v * 0.6 + dist * 0.4 + T * 0.1) * (.5 + geo * .5);
Paste it. The spiral catches every color in the spectrum.
The code
[object Object]