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OPEN  Bug report #269  -  Hue blend method fails when all the color components are the same
Posted Dec 27, 2012 - updated Jan 05, 2019
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Issue details
  • Type of issue
    Bug report
  • Status
     
    		 New
  • Assigned to
    Not assigned to anyone
  • Progress
       
  • Type of bug
    Not triaged
  • Likelihood
    Not triaged
  • Effect
    Not triaged
  • Posted by
    Carlos López
  • Owned by
    Not owned by anyone
  • Category
    Rendering
  • Resolution
    Not determined
  • Priority
    Not determined
  • Targetted for
    icon_milestones.png Not determined
  • Tags
    icon_customdatatype.png blend method
  • Difficulty
    icon_customdatatype.png Easy
Issue description
The Hue blend method takes the components of the source color and computes a value that results in a calculation of the arc of a tangent which result is 0/0. It gives random values for 64 buts architecture and bluish colors for 32 bits architecture.

http://en.wikipedia.org/wiki/Hue

For convenience of representation, for greys, the hue is defined like 0º.

http://en.wikipedia.org/wiki/HSL_and_HSV#Hue_and_chroma

Steps to reproduce this issue
See attached files in this forum thread:

http://www.synfig.org/forums/viewtopic.php?f=15&t=3961