X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=blender%2Fio_mspgl%2Fmesh.py;h=6b0e6805a7dfe3d88ab1cf44bcce08d391a28dc8;hp=9741b8dd916f28495d3e25cde8fd64e767a7d118;hb=68cb1241d18f2e1d4d1bb3322edc694e2ea267df;hpb=ab786f1f6ea398fe0b91d6ec7c039468a90c044b

diff --git a/blender/io_mspgl/mesh.py b/blender/io_mspgl/mesh.py
index 9741b8dd..6b0e6805 100644
--- a/blender/io_mspgl/mesh.py
+++ b/blender/io_mspgl/mesh.py
@@ -158,7 +158,6 @@ class Mesh:
 		self.winding_test = mesh.winding_test
 		self.smoothing = mesh.smoothing
 		self.use_uv = mesh.use_uv
-		self.tangent_vecs = mesh.tangent_vecs
 		self.tangent_uvtex = mesh.tangent_uvtex
 		self.vertex_groups = mesh.vertex_groups
 
@@ -229,6 +228,21 @@ class Mesh:
 		else:
 			self.lines = []
 
+		# Check if tangent vectors are needed
+		if mesh.tangent_vecs=='NO':
+			self.tangent_vecs = False
+		elif mesh.tangent_vecs=='YES':
+			self.tangent_vecs = True
+		elif mesh.tangent_vecs=='AUTO':
+			from .material import Material
+			self.tangent_vecs = False
+			for m in self.materials:
+				mat = Material(m)
+				if mat.type=="pbr":
+					normal_prop = next((p for p in mat.properties if p.tex_keyword=="normal_map"), None)
+					if normal_prop and normal_prop.texture:
+						self.tangent_vecs = True
+
 		self.vertex_sequence = []
 
 	def transform(self, matrix):