X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=blender%2Fio_mspgl%2Fmesh.py;h=125bc5bbbaf01a938af18ec21eefb76239f1534b;hb=ff85f90d33023d908c534b0bf5d9a65e9fc2cce2;hp=78cae28b22f662d3e0eb2ca9fdbb8073536f7893;hpb=171f8e9be4fd17ebc7a467d9a8f959a1bba6b3e6;p=libs%2Fgl.git

diff --git a/blender/io_mspgl/mesh.py b/blender/io_mspgl/mesh.py
index 78cae28b..125bc5bb 100644
--- a/blender/io_mspgl/mesh.py
+++ b/blender/io_mspgl/mesh.py
@@ -1,6 +1,7 @@
 import bpy
 import math
 import mathutils
+import itertools
 
 def make_edge_key(i1, i2):
 	return (min(i1, i2), max(i1, i2))
@@ -167,6 +168,7 @@ class UvLayer:
 class Mesh:
 	def __init__(self, mesh):
 		self._mesh = mesh
+		self.name = mesh.name
 
 		self.winding_test = mesh.winding_test
 		self.tbn_vecs = mesh.tbn_vecs
@@ -187,17 +189,21 @@ class Mesh:
 			self.uv_layers = []
 		else:
 			self.uv_layers = [UvLayer(u) for u in mesh.uv_layers]
-			self.uv_layers = sorted([u for u in self.uv_layers if not u.hidden], key=(lambda u: (u.unit or 1000, u.name)))
+
+			# Assign texture unit numbers to UV layers that lack one
+			missing_unit = [u for u in self.uv_layers if u.unit is None]
+			if missing_unit:
+				missing_unit = sorted(missing_unit, key=(lambda u: u.name))
+				used_units = [u.unit for u in self.uv_layers if u.unit is not None]
+				for u, n in zip(missing_unit, (i for i in itertools.count() if i not in used_units)):
+					u.unit = n
+
+			self.uv_layers = sorted(self.uv_layers, key=(lambda u: u.unit))
 
 			if self.use_uv=='UNIT0':
 				self.uv_layers = [self.uv_layers[0]]
-
-			# Assign texture unit numbers to UV layers that lack one
-			next_unit = max((u.unit+1 for u in self.uv_layers if u.unit is not None), default=0)
-			for u in self.uv_layers:
-				if not u.unit:
-					u.unit = next_unit
-					next_unit += 1
+				if self.uv_layers[0].unit!=0:
+					self.uv_layers = []
 
 		# Rewrite links between elements to point to cloned data, or create links
 		# where they don't exist
@@ -387,6 +393,30 @@ class Mesh:
 				for g in v.groups:
 					g.group = group_index_map[g.group]
 
+	def apply_material_map(self, material_map):
+		for m in self.materials:
+			if m not in material_map.materials:
+				raise Exception("Material map is not compatible with Mesh")
+
+		if self.use_uv=='NONE':
+			return
+
+		layer = UvLayer("material_map")
+		if self.use_uv=='UNIT0':
+			self.uv_layers = [layer]
+			layer.unit = 0
+		else:
+			self.uv_layers.append(layer)
+			used_units = [u.unit for u in self.uv_layers]
+			layer.unit = next(i for i in itertools.count() if i not in used_units)
+			self.uv_layers.sort(key=lambda u: u.unit)
+
+		layer.uvs = [(0.0, 0.0)]*len(self.loops)
+		for f in self.faces:
+			uv = material_map.get_material_uv(self.materials[f.material_index])
+			for i in f.loop_indices:
+				layer.uvs[i] = uv
+
 	def prepare_uv(self, progress):
 		# Form a list of UV layers referenced by materials with the array atlas
 		# property set
@@ -734,7 +764,7 @@ class Mesh:
 		self._mesh = None
 
 
-def create_mesh_from_object(context, obj, progress):
+def create_mesh_from_object(context, obj, progress, *, material_map=None):
 	if obj.type!="MESH":
 		raise Exception("Object is not a mesh")
 
@@ -773,6 +803,11 @@ def create_mesh_from_object(context, obj, progress):
 		else:
 			mesh = me
 
+	mesh.name = obj.data.name
+
+	if material_map:
+		mesh.apply_material_map(material_map)
+
 	progress.set_task("Triangulating", 0.2, 0.3)
 	mesh.prepare_triangles(progress)
 	progress.set_task("Smoothing", 0.3, 0.5)