Search a research paper widely available in the net as a PDF: "Piecewise Circular Approximation of Spirals and Polar Polynomials" It describes how you can approximate a linear spiral using circle arcs. You can then use Gimp paths to create the arcs. There is a well known approximation or a circle arc with a Bezier spline (Gimp paths are actually Bezier splines)(search "Bezier kappa"), so you just string the circle arcs into a path, that you render. You can describe your spiral with 4 control points (12 if you include tangents) per turn. If you are not too familiar with Paths, see: https://www.gimp-forum.net/Thread-Paths-Basics If you want examples of scripts that use Gimp's vectors/paths, see: http://sourceforge.net/projects/gimp-path-tools/files/scripts/ In particular see: golden-spiral-0.0.py On 22/02/2021 18:31, José E Uzcategui via gimp-developer-list wrote:
Hello: I have developed a plug-in to add layers of golden ratio circles, squares and a spiral . I create spiral by writing each point, it seems to be slow but accurate. Would you advise any method alternative? https://youtu.be/CC1l9RPhpJM https://github.com/JoelHz/goldenratioGimpPython.git thanks in advance. _______________________________________________ gimp-developer-list mailing list List address: gimp-developer-list@xxxxxxxxx List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list
_______________________________________________ gimp-developer-list mailing list List address: gimp-developer-list@xxxxxxxxx List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list
