How does colorised texture work?

Developers SketchUp SDK
12

Sorry - things got really busy. Here’s a quick draft:

def get_deltas(shift = true)
  from = texture.average_color
  to = material.color
  
  # Get HLS of base color.
  base_h, base_s, base_l = from.get_hsl

  # Get HLS of new color.
  h, s, l = to.get_hsl
  
  if to.is_monochrome? && from.is_monochrome?
    h = 0
    s = 0
    l = l - base_l
  else if to.is_monochrome?
    h = 0
    s = -1
    l = l - base_l
  else if from.is_monochrome?
    l = l - base_l
  else
    l = l - base_l
    s = s - base_s
    if shift
      h = h - base_h
    end
  end
    
  return [h, s, l]
end
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