[Bf-extensions-cvs] [31a59ab] master: Add node presets uses a directory to store blends containing node presets in groups.
Campbell Barton
noreply at git.blender.org
Thu Jan 30 14:51:55 CET 2014
Commit: 31a59ab125250bc56f98b7c93064918556dbc1a8
Author: Campbell Barton
Date: Fri Jan 31 00:51:11 2014 +1100
https://developer.blender.org/rBAC31a59ab125250bc56f98b7c93064918556dbc1a8
Add node presets uses a directory to store blends containing node
presets in groups.
===================================================================
A node_presets.py
===================================================================
diff --git a/node_presets.py b/node_presets.py
new file mode 100644
index 0000000..f7d6c48
--- /dev/null
+++ b/node_presets.py
@@ -0,0 +1,215 @@
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; version 2
+# of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+bl_info = {
+ "name": "Node Presets",
+ "description": "Useful and time-saving tools for rendering workflow",
+ "author": "Campbell Barton",
+ "version": (1, 1),
+ "blender": (2, 6, 9),
+ "location": "Node > Add Template",
+ "description": "Adds node presets",
+ "warning": "",
+ "wiki_url": "",
+ "tracker_url": "",
+ "category": "Render"}
+
+
+import os
+import bpy
+from bpy.types import Operator, Menu, AddonPreferences
+from bpy.props import StringProperty
+
+
+# -----------------------------------------------------------------------------
+# Node Adding Operator
+
+
+def node_center(context):
+ from mathutils import Vector
+ loc = Vector((0.0, 0.0))
+ node_selected = context.selected_nodes
+ if node_selected:
+ for node in node_selected:
+ loc += node.location
+ loc /= len(node_selected)
+ return loc
+
+
+def node_template_add(context, filepath, node_group, report):
+ """ Main function
+ """
+
+ space = context.space_data
+ node_tree = space.node_tree
+ node_active = context.active_node
+ node_selected = context.selected_nodes
+
+ if node_tree is None:
+ report({'ERROR'}, "No node tree available")
+ return
+
+ with bpy.data.libraries.load(filepath, link=False) as (data_from, data_to):
+ assert(node_group in data_from.node_groups)
+ data_to.node_groups = [node_group]
+ node_group = data_to.node_groups[0]
+
+ # add node!
+ center = node_center(context)
+
+ for node in node_tree.nodes:
+ node.select = False
+
+ node_type_string = {
+ "ShaderNodeTree": "ShaderNodeGroup",
+ "CompositorNodeTree": "CompositorNodeGroup",
+ "TextureNodeTree": "TextureNodeGroup",
+ }[type(node_tree).__name__]
+
+ node = node_tree.nodes.new(type=node_type_string)
+ node.node_tree = node_group
+
+ is_fail = (node.node_tree is None)
+ if is_fail:
+ report({'WARNING'}, "Incompatible node type")
+
+ node.select = True
+ node_tree.nodes.active = node
+ node.location = center
+
+ if is_fail:
+ node_tree.nodes.remove(node)
+ else:
+ bpy.ops.node.group_ungroup()
+
+ node_group.user_clear()
+ bpy.data.node_groups.remove(node_group)
+
+
+# -----------------------------------------------------------------------------
+# Node Template Prefs
+
+def node_search_path(context):
+ user_preferences = context.user_preferences
+ addon_prefs = user_preferences.addons[__name__].preferences
+ dirpath = addon_prefs.search_path
+ return dirpath
+
+
+class NodeTemplatePrefs(AddonPreferences):
+ bl_idname = __name__
+
+ search_path = StringProperty(
+ name="Directory of blend files with node-groups",
+ subtype='DIR_PATH',
+ )
+
+ def draw(self, context):
+ layout = self.layout
+ layout.prop(self, "search_path")
+
+
+class NODE_OT_template_add(Operator):
+ """Add a node template"""
+ bl_idname = "node.template_add"
+ bl_label = "Add Mesh Object"
+ bl_description = "Create a new Mesh Object"
+ bl_options = {'REGISTER', 'UNDO'}
+
+ filepath = StringProperty(
+ subtype='FILE_PATH',
+ )
+ group_name = StringProperty(
+ )
+
+ def execute(self, context):
+ node_template_add(context, self.filepath, self.group_name, self.report)
+
+ return {'FINISHED'}
+
+
+# -----------------------------------------------------------------------------
+# node menu list
+
+def node_template_cache(context, reload=False):
+ node_cache = node_template_cache._node_cache
+ if reload:
+ node_cache[:] = []
+ if node_cache:
+ return node_cache
+
+ dirpath = node_search_path(context)
+ for fn in os.listdir(dirpath):
+ if fn.endswith(".blend"):
+ filepath = os.path.join(dirpath, fn)
+ with bpy.data.libraries.load(filepath) as (data_from, data_to):
+ for group_name in data_from.node_groups:
+ node_cache.append((filepath, group_name))
+
+ return node_cache
+node_template_cache._node_cache = []
+
+
+class NODE_MT_template_add(Menu):
+ bl_label = "Node Template"
+
+ def draw(self, context):
+ layout = self.layout
+
+ dirpath = node_search_path(context)
+ if dirpath == "":
+ layout.label("Set search dir in the addon-prefs")
+ return
+
+ for filepath, group_name in node_template_cache(context):
+ props = layout.operator(NODE_OT_template_add.bl_idname,
+ text=group_name)
+ props.filepath = filepath
+ props.group_name = group_name
+
+
+def add_node_button(self, context):
+ self.layout.menu(
+ NODE_MT_template_add.__name__,
+ text="Template",
+ icon="PLUGIN")
+
+
+classes = (
+ NODE_OT_template_add,
+ NODE_MT_template_add,
+ NodeTemplatePrefs
+ )
+
+
+def register():
+ for cls in classes:
+ bpy.utils.register_class(cls)
+
+ bpy.types.NODE_MT_add.append(add_node_button)
+
+
+def unregister():
+ for cls in classes:
+ bpy.utils.unregister_class(cls)
+
+ bpy.types.NODE_MT_add.remove(add_node_button)
+
+if __name__ == "__main__":
+ register()
+
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