[Raku PDF Project] / [PDF-Class Module]
/ShadingType 3 - Radial
(Required) An array of four numbers [ x0 y0 x1 y1 ] specifying the starting and ending coordinates of the axis, expressed in the shading’s target coordinate space.
(Optional) An array of two numbers [ t0 t1 ] specifying the limiting values of a parametric variable t. The variable is considered to vary linearly between these two values as the color gradient varies between the starting and ending points of the axis
(Required) A 1-in, n-out function or an array of n 1-in, 1-out functions (where nis the number of color components in the shading dictionary’s color space)
(Optional) An array of two boolean values specifying whether to extend the shading beyond the starting and ending points of the axis, respectively