Merge branch 'improved-material-support-1' into 'master'

Add preset material, pull more variables into the template

The BitsquidPBR.blend file includes a preset material which is set up to mimic the "core/stingray_renderer/shader_import/standard" shader graph. This single material is loaded into the current project through Blenders "Append..." API when a file is loaded (or a new one created). 

![image](/uploads/c7fd5d03ea221f23aa728f879a451aa5/image.png)

It also pulls the basic values into the material template. The map textures can be added later.

There is also a small fix for the `MATERIAL_OT_bitsquid_export`, because it didn't seem to work on my system (Blender 2.92.0).

See merge request lschwiderski/bitsquid-blender-tools!1

addons/bitsquid/__init__.py

@@ -13,7 +13,7 @@
 #
 #    You should have received a copy of the GNU General Public License
 #    along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
+import os
 
 bl_info = {
     "name": "Bitsquid Engine",
@@ -35,6 +35,7 @@ if "bpy" in locals():
 
 
 import bpy
+from bpy.app.handlers import persistent
 from bpy.types import (
     Panel,
     Operator,
@@ -158,8 +159,8 @@ class MATERIAL_OT_bitsquid_export(Operator):
         return bpy.data.is_saved and context.active_object is not None
 
     def execute(self, context):
-        material = context.active_material
-        return unit_export.save(self, context, material)
+        material = context.material
+        return material_export.save(self, context, material)
 
 
 class MATERIAL_PT_bitsquid(Panel):
@@ -195,6 +196,25 @@ classes = [
     MATERIAL_OT_bitsquid_export,
 ]
 
+def import_template():
+    cwd = os.path.dirname(os.path.realpath(__file__))
+    resources_dir = "resources"
+    blendfile = "BitsquidPBR.blend"
+    section   = "Material"
+    object    = "Stingray Standard"
+
+    filepath  = os.path.join(cwd, resources_dir, blendfile, section, object)
+    directory = os.path.join(cwd, resources_dir, blendfile, section)
+    filename  = object
+
+    bpy.ops.wm.append(
+        filepath=filepath,
+        filename=filename,
+        directory=directory)
+
+@persistent
+def load_handler(dummy):
+    import_template()
 
 def register():
     from bpy.utils import register_class
@@ -205,6 +225,7 @@ def register():
     bpy.types.Object.bitsquid = PointerProperty(type=BitsquidObjectSettings)
     bpy.types.Material.bitsquid = PointerProperty(type=BitsquidMaterialSettings)
 
+    bpy.app.handlers.load_post.append(load_handler)
 
 def unregister():
     del bpy.types.Scene.bitsquid
@@ -213,6 +234,7 @@ def unregister():
     for cls in reversed(classes):
         unregister_class(cls)
 
+    bpy.app.handlers.load_post.remove(load_handler)
 
 if __name__ == "__main__":
     register()

addons/bitsquid/material/export.py

@@ -29,54 +29,54 @@ variables = {
     base_color = {
         type = "vector3"
         value = [
-            1
-            0.333333333333333
-            0
+            {{ base_color[0] }}
+            {{ base_color[1] }}
+            {{ base_color[2] }}
         ]
     }
     emissive = {
         type = "vector3"
         value = [
-            0
-            0
-            0
+            {{ emissive[0] }}
+            {{ emissive[1] }}
+            {{ emissive[2] }}
         ]
     }
     emissive_intensity = {
         type = "scalar"
-        value = 1
+        value = {{ emissive_intensity }}
     }
     metallic = {
         type = "scalar"
-        value = 0
+        value = {{ metallic }}
     }
     roughness = {
         type = "scalar"
-        value = 0.91
+        value = {{ roughness }}
     }
     use_ao_map = {
         type = "scalar"
-        value = 0
+        value = {{ use_ao_map }}
     }
     use_color_map = {
         type = "scalar"
-        value = 0
+        value = {{ use_color_map }}
     }
     use_emissive_map = {
         type = "scalar"
-        value = 0
+        value = {{ use_emissive_map }}
     }
     use_metallic_map = {
         type = "scalar"
-        value = 0
+        value = {{ use_metallic_map }}
     }
     use_normal_map = {
         type = "scalar"
-        value = 0
+        value = {{ use_normal_map }}
     }
     use_roughness_map = {
         type = "scalar"
-        value = 0
+        value = {{ use_roughness_map }}
     }
 }
 
@@ -102,7 +102,37 @@ def save(self, context, material):
 
     namespace = {
         'material': material,
+
+        'base_color': (1, 1, 1),
+        'roughness': 0.0,
+        'metallic': 0.0,
+        'emissive': (0, 0, 0),
+        'emissive_intensity': 0,
+
+        'use_color_map': 0,
+        'use_roughness_map': 0,
+        'use_metallic_map': 0,
+        'use_emissive_map': 0,
+        'use_ao_map': 0,
+        'use_normal_map': 0
     }
+
+    nodes = material.node_tree.nodes
+    try:
+        namespace['base_color'] = nodes["Base Color"].outputs[0].default_value
+        namespace['roughness'] = nodes["Roughness"].outputs[0].default_value
+        namespace['metallic'] = nodes["Metallic"].outputs[0].default_value
+        namespace['emissive'] = nodes["Emissive"].outputs[0].default_value
+        namespace['emissive_intensity'] = nodes["Emissive Intensity"].outputs[0].default_value
+        namespace['use_color_map'] = nodes["Use Color Map"].outputs[0].default_value
+        namespace['use_roughness_map'] = nodes["Use Roughness Map"].outputs[0].default_value
+        namespace['use_metallic_map'] = nodes["Use Metallic Map"].outputs[0].default_value
+        namespace['use_emissive_map'] = nodes["Use Emissive Map"].outputs[0].default_value
+        namespace['use_ao_map'] = nodes["Use AO Map"].outputs[0].default_value
+        namespace['use_normal_map'] = nodes["Use Normal Map"].outputs[0].default_value
+    except:
+        self.report({'WARNING'}, "Couldn't find Stingray Standard nodes")
+
     content = step.Template(template, strip=False).expand(namespace)
 
     with open(filepath, "w", encoding="utf8", newline="\n") as f: