Recognize transparent materials in Blender and export them accordingly

[libs/gl.git] / blender / io_mspgl / export_scene.py

diff --git a/blender/io_mspgl/export_scene.py b/blender/io_mspgl/export_scene.py
index 1a1bbab062859d794e23361a16cb03d927b40829..162a1882b5e8d135168600da6e0bd2550fd00f21 100644 (file)
--- a/blender/io_mspgl/export_scene.py
+++ b/blender/io_mspgl/export_scene.py
@@ -37,19 +37,28 @@ class SceneExporter:
                from .datafile import Resource, Statement, Token
                scene_res = Resource(scene.name+".scene", "scene")
 
-               if scene.background_set:
+               if scene.background_set or (scene.instances and scene.blended_instances):
                        scene_res.statements.append(Statement("type", Token("ordered")))
                        if scene.background_set:
                                scene_res.statements.append(scene_res.create_reference_statement("scene", resources[scene.background_set.name+".scene"]))
 
-                       st = Statement("scene")
-                       st.sub.append(Statement("type", Token("simple")))
-                       self.add_instances(scene_res, st.sub, scene.instances, resources)
-                       scene_res.statements.append(st)
+                       if scene.instances:
+                               st = Statement("scene")
+                               st.sub.append(Statement("type", Token("simple")))
+                               self.add_instances(scene_res, st.sub, scene.instances, resources)
+                               scene_res.statements.append(st)
+
+                       if scene.blended_instances:
+                               st = Statement("scene")
+                               st.sub.append(Statement("type", Token("zsorted")))
+                               self.add_instances(scene_res, st.sub, scene.blended_instances, resources)
+                               scene_res.statements.append(st)
                else:
-                       scene_res.statements.append(Statement("type", Token("simple")))
+                       scene_type = "zsorted" if scene.blended_instances else "simple"
+                       scene_res.statements.append(Statement("type", Token(scene_type)))
 
                        self.add_instances(scene_res, scene_res.statements, scene.instances, resources)
+                       self.add_instances(scene_res, scene_res.statements, scene.blended_instances, resources)
 
                return scene_res
 
@@ -118,11 +127,32 @@ class SceneExporter:
                ss.sub.append(Statement("depth", 1.0))
                seq_res.statements.append(ss)
 
-               ss = Statement("step", "", "content")
-               ss.sub.append(Statement("depth_test", Token("LEQUAL")))
-               ss.sub.append(seq_res.create_reference_statement("lighting", resources[scene.name+".lightn"]))
-               ss.sub.append(seq_res.create_reference_statement("scene", resources[scene.name+".scene"]))
-               seq_res.statements.append(ss)
+               scene_res = resources[scene.name+".scene"]
+               lighting_res = resources[scene.name+".lightn"]
+
+               any_opaque = False
+               any_blended = False
+               s = scene
+               while s:
+                       if s.instances:
+                               any_opaque = True
+                       if s.blended_instances:
+                               any_blended = True
+                       s = s.background_set
+
+               if any_opaque:
+                       ss = Statement("step", "", "content")
+                       ss.sub.append(Statement("depth_test", Token("LEQUAL")))
+                       ss.sub.append(seq_res.create_reference_statement("lighting", lighting_res))
+                       ss.sub.append(seq_res.create_reference_statement("scene", scene_res))
+                       seq_res.statements.append(ss)
+
+               if any_blended:
+                       ss = Statement("step", "blended", "content")
+                       ss.sub.append(Statement("depth_test", Token("LEQUAL")))
+                       ss.sub.append(seq_res.create_reference_statement("lighting", lighting_res))
+                       ss.sub.append(seq_res.create_reference_statement("scene", scene_res))
+                       seq_res.statements.append(ss)
 
                if scene.use_ao:
                        ss = Statement("ambient_occlusion")