Pyramid Divergence
This divergence creates a pyramid-shaped pattern. It's used to draw circles, boxes, stars, lines and other symmetric shapes.
| Pyramid [overflow] | |||||||||||||||
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Remarks
Definition of a pyramid function starts with parameters of so-called affine transform.
It rotates the pattern around arbitrary "focus" point and shifts it by extent of horizontal and
vertical offset. There's common practice to use random numbers in place of affine parameters.
It varies a painting but doesn't change its style.
Tallness is height of the pyramid peak. If it exceeds 1.0 an
overflow happens (when it's enabled). Overflowing visually looks like a number of sharp curves. It's
managed by overflow tag. If it's not present the function never exceeds the
upper limit and the pattern looks smooth.
Position specifies coordinates of the shape's center. Bias
affects to the steepness of pyramid slopes. It's split on horizontal and vertical components. A bigger
value means a steeper slope. The steeper pyramid is, the smaller it is at the same tallness.
Distortion pair defines the shape as it's shown on the pictures below (of course these
cases don't span all variety of shapes).
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| distortion 1 1 |
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| distortion 2 2 |
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| distortion 3 3 |
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| distortion 0.5 0.5 |
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| distortion 0.1 0.1 |
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| distortion 0.5 2 |
Example
# Pyramid shaped as a star Pyramid angle 0 focus 0 0 offset 0 0 tallness 1.5 position 10 10 bias 0.00001 0.00001 distortion 0.13 0.13
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