fix: SetColors expects an System.Array, loop instead

Author: tetov

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+* Replaced use of `Rhino.Geometry.VertexColors.SetColors` with a for loop and `SetColor` in `compas_ghpyton` since the former requires a `System.Array`.
 * Changed the `__str__` of `compas.geometry.Frame`, `compas.geometry.Plane`, `compas.geometry.Polygon`, `compas.geometry.Polyhedron`, `compas.geometry.Quaternion` to use a limited number of decimals (determined by `Tolerance.PRECISION`). Note: `__repr__` will instead maintain full precision.
 * Changed the `__str__` of `compas.geometry.Pointcloud` to print total number of points instead of the long list of points. Note: `__repr__` will still print all the points with full precision.
 * Fixed bug in `Pointcloud.from_box()`.

src/compas_ghpython/drawing.py

@@ -373,8 +373,10 @@ def draw_mesh(vertices, faces, color=None, vertex_normals=None, texture_coordina
 
     if color:
         count = len(mesh.Vertices)
-        colors = [rs.coercecolor(color) for i in range(count)]
-        mesh.VertexColors.SetColors(colors)
+        color = rs.CreateColor(color)
+
+        for i in range(count):
+            mesh.VertexColors.SetColor(i, color.R, color.G, color.B)
 
     return mesh