From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 5 May 2021 12:29:05 +0000 (+0300)
Subject: Export the scene's background color as ambient light color
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=7d8c187f036a7c91f9073ca0071a20807c0f1aa5

Export the scene's background color as ambient light color
---

diff --git a/blender/io_mspgl/export_scene.py b/blender/io_mspgl/export_scene.py
index 39a7428e..77755a65 100644
--- a/blender/io_mspgl/export_scene.py
+++ b/blender/io_mspgl/export_scene.py
@@ -101,6 +101,7 @@ class SceneExporter:
 		lighting_name = scene.name+".lightn"
 		if lighting_name not in resources:
 			lighting_res = Resource(lighting_name, "lighting")
+			lighting_res.statements.append(Statement("ambient", *tuple(scene.ambient_light)))
 			for l in lights:
 				lighting_res.statements.append(lighting_res.create_reference_statement("light", resources[l.name+".light"]))
 
diff --git a/blender/io_mspgl/scene.py b/blender/io_mspgl/scene.py
index 21d54c7b..7532f48c 100644
--- a/blender/io_mspgl/scene.py
+++ b/blender/io_mspgl/scene.py
@@ -1,3 +1,5 @@
+import mathutils
+
 def is_same_object(obj1, obj2):
 	if obj1.data.name!=obj2.data.name:
 		return False
@@ -23,12 +25,23 @@ class Scene:
 		self.prototypes = []
 		self.instances = []
 		self.lights = []
+		self.ambient_light = mathutils.Color((0.0, 0.0, 0.0))
 		self.exposure = scene.view_settings.exposure
 
 		self.use_hdr = False
 		if scene.world:
 			self.use_hdr = scene.world.use_hdr
 
+			out_node = next((n for n in scene.world.node_tree.nodes if n.type=='OUTPUT_WORLD'), None)
+			if out_node:
+				from .util import get_linked_node_and_socket
+
+				surface_node, _ = get_linked_node_and_socket(scene.world.node_tree, out_node.inputs["Surface"])
+				if surface_node and surface_node.type=='BACKGROUND':
+					c = surface_node.inputs["Color"].default_value
+					s = surface_node.inputs["Strength"].default_value
+					self.ambient_light = mathutils.Color(c[:3])*s
+
 		objects = scene.objects[:]
 		objects.sort(key=lambda o:o.name)
 		if obj_filter: