From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 20 Mar 2021 15:33:40 +0000 (+0200)
Subject: Support exporting unlit materials
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=532b877ac54969ca186b12b05baa483625e3f5d0;p=libs%2Fgl.git

Support exporting unlit materials

These use the emission surface type in Blender.  While that may seem
strange at first, it's actually a good match to how unlit materials
behave in a realtime scene.
---

diff --git a/blender/io_mspgl/export_material.py b/blender/io_mspgl/export_material.py
index 1df53470..d69389cc 100644
--- a/blender/io_mspgl/export_material.py
+++ b/blender/io_mspgl/export_material.py
@@ -64,7 +64,7 @@ class MaterialExporter:
 		from .datafile import Resource, Statement
 		mat_res = Resource(material.name+".mat", "material")
 
-		if material.type!="pbr":
+		if material.type!="pbr" and material.type!="unlit":
 			raise Exception("Can't export unknown material type "+material.type)
 
 		st = Statement(material.type)
diff --git a/blender/io_mspgl/material.py b/blender/io_mspgl/material.py
index d2528605..e97561b7 100644
--- a/blender/io_mspgl/material.py
+++ b/blender/io_mspgl/material.py
@@ -92,6 +92,12 @@ class Material:
 			roughness.set_from_input(material.node_tree, surface_node.inputs["Roughness"])
 			normal.set_from_input(material.node_tree, surface_node.inputs["Normal"])
 			emission.set_from_input(material.node_tree, surface_node.inputs["Emission"])
+		elif surface_node.type=='EMISSION':
+			self.type = "unlit"
+
+			color = self.create_property("color", "texture", (1.0, 1.0, 1.0, 1.0))
+
+			color.set_from_input(material.node_tree, surface_node.inputs["Color"])
 		else:
 			raise Exception("Unsupported surface node type "+surface_node.type)