scripts-blender/addons/brushstroke_tools/ops.py

@@ -16,16 +16,8 @@ class BSBST_OT_new_brushstrokes(bpy.types.Operator):
     def poll(cls, context):
         return context.mode == 'OBJECT'
 
-    def execute(self, context):
-
+    def new_brushstrokes_object(self, context, name):
         settings = context.scene.BSBST_settings
-        
-        utils.ensure_resources()
-
-        surface_object = context.object if context.object in context.selected_objects else None
-
-        name = 'Brushstrokes'
-
         if settings.curve_mode == 'GP':
             bpy.ops.object.grease_pencil_add(type='EMPTY')
             context.object.name = name
@@ -43,9 +35,51 @@ class BSBST_OT_new_brushstrokes(bpy.types.Operator):
             for ob in bpy.data.objects:
                 ob.select_set(False)
             brushstrokes_object.select_set(True)
+        return brushstrokes_object
+
+    def new_flow_object(self, context, name):
+        settings = context.scene.BSBST_settings
+        if settings.curve_mode == 'GP':
+            bpy.ops.object.grease_pencil_add(type='EMPTY')
+            context.object.name = name
+            context.object.data.name = name
+            flow_object = context.object
+        else:
+            if settings.curve_mode == 'CURVE':
+                flow_data = bpy.data.curves.new(name, type='CURVE')
+                flow_data.dimensions = '3D'
+            elif settings.curve_mode == 'CURVES':
+                flow_data = bpy.data.hair_curves.new(name)
+            flow_object = bpy.data.objects.new(name, flow_data)
+            context.collection.objects.link(flow_object)
+            context.view_layer.objects.active = flow_object
+            for ob in bpy.data.objects:
+                ob.select_set(False)
+            flow_object.select_set(True)
+        return flow_object
+
+    def execute(self, context):
+
+        settings = context.scene.BSBST_settings
+        
+        utils.ensure_resources()
+
+        surface_object = context.object if context.object in context.selected_objects else None
+        flow_object = None
+
+        name = 'Brushstrokes'
+        brushstrokes_object = self.new_brushstrokes_object(context, name)
+        flow_is_required = settings.brushstroke_method == 'SURFACE_FILL'
+        if flow_is_required:
+            flow_object = self.new_flow_object(context, f'{name}-FLOW')
 
         # attach surface object pointer
-        brushstrokes_object['BSBST_surface_object'] = surface_object
+        if surface_object:
+            brushstrokes_object['BSBST_surface_object'] = surface_object
+            if flow_object:
+                flow_object['BSBST_surface_object'] = surface_object
+        if flow_object:
+            brushstrokes_object['BSBST_flow_object'] = flow_object
         brushstrokes_object['BSBST_active'] = True
         brushstrokes_object['BSBST_method'] = settings.brushstroke_method
 

scripts-blender/addons/brushstroke_tools/settings.py

@@ -1,4 +1,5 @@
 import bpy
+from . import utils
 from bpy.app.handlers import persistent
 
 @persistent
@@ -9,17 +10,20 @@ def find_context_brushstrokes(dummy):
     for el in range(len(settings.context_brushstrokes)):
         settings.context_brushstrokes.remove(0)
     context_object = context.object
-    if 'BSBST_surface_object' in context_object.keys():
-        ob = context_object['BSBST_surface_object']
-        if ob:
-            context_object = ob
+    surf_ob = utils.get_surface_object(context_object)
+    if surf_ob:
+        context_object = surf_ob
     for ob in bpy.data.objects:
-        if not ('BSBST_surface_object' in ob.keys()):
-            continue
-        if not ob['BSBST_surface_object']:
-            continue
-        if not ob['BSBST_surface_object'] == context_object:
+        if not utils.is_brushstrokes_object(ob):
             continue
+        surf_ob = utils.get_surface_object(ob)
+        flow_ob = utils.get_flow_object(ob)
+        if not surf_ob:
+            if not flow_ob:
+                continue
+        if not surf_ob == context_object:
+            if not flow_ob == context_object:
+                continue
         bs = settings.context_brushstrokes.add()
         bs.name = ob.name
         bs.method = ob['BSBST_method']

scripts-blender/addons/brushstroke_tools/ui.py

@@ -83,14 +83,20 @@ class BSBST_PT_brushstroke_tools_panel(bpy.types.Panel):
         layout = self.layout
 
         settings = context.scene.BSBST_settings
-
         surface_object = None
-        if context.object:
-            if 'BSBST_surface_object' in context.object.keys():
-                surface_object = context.object['BSBST_surface_object']
-            else:
-                surface_object = context.object
-            layout.label(text=f'Surface Object: {surface_object.name}' if surface_object else 'No Surface Object', icon='OUTLINER_OB_SURFACE')
+        if settings.context_brushstrokes:
+                active_brushstrokes_object = bpy.data.objects.get(settings.context_brushstrokes[settings.active_context_brushstrokes_index].name)
+                if active_brushstrokes_object:
+                    if 'BSBST_surface_object' in active_brushstrokes_object.keys():
+                        surface_object = active_brushstrokes_object['BSBST_surface_object']
+                    else:
+                        surface_object = context.object
+                else:
+                    surface_object = context.object
+        else:
+            surface_object = context.object
+
+        layout.label(text=f'{surface_object.name}' if surface_object else 'No Surface Object', icon='OUTLINER_OB_SURFACE')
         
         layout.prop(settings, 'brushstroke_method', expand=True)
 
@@ -111,7 +117,7 @@ class BSBST_PT_brushstroke_tools_panel(bpy.types.Panel):
         if settings.style_context=='PRESET':
             style_object = settings.preset_object
         else:
-            if 'BSBST_active' in context.object.keys():
+            if utils.is_brushstrokes_object(context.object):
                 style_object = context.object
             else:
                 if settings.context_brushstrokes:
@@ -132,7 +138,7 @@ class BSBST_PT_brushstroke_tools_panel(bpy.types.Panel):
         style_header.row().prop(settings, 'style_context', icon_only=True, expand=True)
 
         if style_panel:
-            if settings.style_context=='BRUSHSTROKES' and not 'BSBST_active' in style_object.keys():
+            if settings.style_context=='BRUSHSTROKES' and not utils.is_brushstrokes_object(style_object):
                 style_panel.label(text='No Brushstroke Context Found', icon='ERROR')
                 return
             if not is_preset and len(settings.context_brushstrokes)>0: