Reference:Spiral1 Pattern
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The spiral1
pattern creates a spiral that winds around the
z-axis similar to a screw. When viewed sliced in the x-y plane, it looks like
the spiral arms of a galaxy. Its syntax is:
pigment { spiral1 Number_of_Arms [PIGMENT_MODIFIERS...] }
The Number_of_Arms
value determines how may arms are
winding around the z-axis.
As a normal pattern, the syntax is
normal { spiral1 Number_of_Arms [, Bump_Size] [NORMAL_MODIFIERS...] }
where the Number_of_Arms
value is a required
parameter but the float Bump_Size
which follows is
optional.
Note: The comma is required especially if Bump_Size is negative.
The pattern uses the triangle_wave
wave type by default but may
use any wave type.