Интегрирован модуль импорта моделей из FreeCAD в Blender

cg/blender/utils/shininess_to_roughness.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+# original alg from https://github.com/assimp/assimp/issues/4573
+# Copyright (C) 2023 Ilia Kurochkin <brothermechanic@gmail.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+__version__ = "0.1"
+
+import math
+
+
+def shiny_to_rough(shininess):
+    """ convert shiny to roughness """
+    a, b = -1.0, 2.0
+    c = (shininess / 100.0) - 1.0
+    D = math.pow(b,2) - (4 * a * c)
+    roughness = (-b + math.sqrt(D)) / (2 * a)
+    if roughness < 0:
+        roughness = 0
+    return roughness