Merge pull request #5 from Yusarina/Alpha-3

Alpha 3

cycles_converter.py

@@ -0,0 +1,240 @@
+# -*- coding: utf-8 -*-
+# Copyright 2012 MMD Tools authors
+# This file is part of MMD Tools.
+
+from typing import Iterable, Optional
+
+import bpy
+
+from .core.shader import _NodeGroupUtils
+from .core.material import FnMaterial
+
+
+def __switchToCyclesRenderEngine():
+    if bpy.context.scene.render.engine != "CYCLES":
+        bpy.context.scene.render.engine = "CYCLES"
+
+
+def __exposeNodeTreeInput(in_socket, name, default_value, node_input, shader):
+    _NodeGroupUtils(shader).new_input_socket(name, in_socket, default_value)
+
+
+def __exposeNodeTreeOutput(out_socket, name, node_output, shader):
+    _NodeGroupUtils(shader).new_output_socket(name, out_socket)
+
+
+def __getMaterialOutput(nodes, bl_idname):
+    o = next((n for n in nodes if n.bl_idname == bl_idname and n.is_active_output), None) or nodes.new(bl_idname)
+    o.is_active_output = True
+    return o
+
+
+def create_MMDAlphaShader():
+    __switchToCyclesRenderEngine()
+
+    if "MMDAlphaShader" in bpy.data.node_groups:
+        return bpy.data.node_groups["MMDAlphaShader"]
+
+    shader = bpy.data.node_groups.new(name="MMDAlphaShader", type="ShaderNodeTree")
+
+    node_input = shader.nodes.new("NodeGroupInput")
+    node_output = shader.nodes.new("NodeGroupOutput")
+    node_output.location.x += 250
+    node_input.location.x -= 500
+
+    trans = shader.nodes.new("ShaderNodeBsdfTransparent")
+    trans.location.x -= 250
+    trans.location.y += 150
+    mix = shader.nodes.new("ShaderNodeMixShader")
+
+    shader.links.new(mix.inputs[1], trans.outputs["BSDF"])
+
+    __exposeNodeTreeInput(mix.inputs[2], "Shader", None, node_input, shader)
+    __exposeNodeTreeInput(mix.inputs["Fac"], "Alpha", 1.0, node_input, shader)
+    __exposeNodeTreeOutput(mix.outputs["Shader"], "Shader", node_output, shader)
+
+    return shader
+
+
+def create_MMDBasicShader():
+    __switchToCyclesRenderEngine()
+
+    if "MMDBasicShader" in bpy.data.node_groups:
+        return bpy.data.node_groups["MMDBasicShader"]
+
+    shader: bpy.types.ShaderNodeTree = bpy.data.node_groups.new(name="MMDBasicShader", type="ShaderNodeTree")
+
+    node_input: bpy.types.NodeGroupInput = shader.nodes.new("NodeGroupInput")
+    node_output: bpy.types.NodeGroupOutput = shader.nodes.new("NodeGroupOutput")
+    node_output.location.x += 250
+    node_input.location.x -= 500
+
+    dif: bpy.types.ShaderNodeBsdfDiffuse = shader.nodes.new("ShaderNodeBsdfDiffuse")
+    dif.location.x -= 250
+    dif.location.y += 150
+    glo: bpy.types.ShaderNodeBsdfAnisotropic = shader.nodes.new("ShaderNodeBsdfAnisotropic")
+    glo.location.x -= 250
+    glo.location.y -= 150
+    mix: bpy.types.ShaderNodeMixShader = shader.nodes.new("ShaderNodeMixShader")
+    shader.links.new(mix.inputs[1], dif.outputs["BSDF"])
+    shader.links.new(mix.inputs[2], glo.outputs["BSDF"])
+
+    __exposeNodeTreeInput(dif.inputs["Color"], "diffuse", [1.0, 1.0, 1.0, 1.0], node_input, shader)
+    __exposeNodeTreeInput(glo.inputs["Color"], "glossy", [1.0, 1.0, 1.0, 1.0], node_input, shader)
+    __exposeNodeTreeInput(glo.inputs["Roughness"], "glossy_rough", 0.0, node_input, shader)
+    __exposeNodeTreeInput(mix.inputs["Fac"], "reflection", 0.02, node_input, shader)
+    __exposeNodeTreeOutput(mix.outputs["Shader"], "shader", node_output, shader)
+
+    return shader
+
+
+def __enum_linked_nodes(node: bpy.types.Node) -> Iterable[bpy.types.Node]:
+    yield node
+    if node.parent:
+        yield node.parent
+    for n in set(l.from_node for i in node.inputs for l in i.links):
+        yield from __enum_linked_nodes(n)
+
+
+def __cleanNodeTree(material: bpy.types.Material):
+    nodes = material.node_tree.nodes
+    node_names = set(n.name for n in nodes)
+    for o in (n for n in nodes if n.bl_idname in {"ShaderNodeOutput", "ShaderNodeOutputMaterial"}):
+        if any(i.is_linked for i in o.inputs):
+            node_names -= set(linked.name for linked in __enum_linked_nodes(o))
+    for name in node_names:
+        nodes.remove(nodes[name])
+
+
+def convertToCyclesShader(obj: bpy.types.Object, use_principled=False, clean_nodes=False, subsurface=0.001):
+    __switchToCyclesRenderEngine()
+    convertToBlenderShader(obj, use_principled, clean_nodes, subsurface)
+
+
+def convertToBlenderShader(obj: bpy.types.Object, use_principled=False, clean_nodes=False, subsurface=0.001):
+    for i in obj.material_slots:
+        if not i.material:
+            continue
+        if not i.material.use_nodes:
+            i.material.use_nodes = True
+            __convertToMMDBasicShader(i.material)
+        if use_principled:
+            __convertToPrincipledBsdf(i.material, subsurface)
+        if clean_nodes:
+            __cleanNodeTree(i.material)
+
+def convertToMMDShader(obj):
+    """BSDF -> MMDShaderDev conversion."""
+    for i in obj.material_slots:
+        if not i.material:
+            continue
+        if not i.material.use_nodes:
+            i.material.use_nodes = True
+        FnMaterial.convert_to_mmd_material(i.material)
+
+def __convertToMMDBasicShader(material: bpy.types.Material):
+    # TODO: test me
+    mmd_basic_shader_grp = create_MMDBasicShader()
+    mmd_alpha_shader_grp = create_MMDAlphaShader()
+
+    if not any(filter(lambda x: isinstance(x, bpy.types.ShaderNodeGroup) and x.node_tree.name in {"MMDBasicShader", "MMDAlphaShader"}, material.node_tree.nodes)):
+        # Add nodes for Cycles Render
+        shader: bpy.types.ShaderNodeGroup = material.node_tree.nodes.new("ShaderNodeGroup")
+        shader.node_tree = mmd_basic_shader_grp
+        shader.inputs[0].default_value[:3] = material.diffuse_color[:3]
+        shader.inputs[1].default_value[:3] = material.specular_color[:3]
+        shader.inputs["glossy_rough"].default_value = 1.0 / getattr(material, "specular_hardness", 50)
+        outplug = shader.outputs[0]
+
+        location = shader.location.copy()
+        location.x -= 1000
+
+        alpha_value = 1.0
+        if len(material.diffuse_color) > 3:
+            alpha_value = material.diffuse_color[3]
+
+        if alpha_value < 1.0:
+            alpha_shader: bpy.types.ShaderNodeGroup = material.node_tree.nodes.new("ShaderNodeGroup")
+            alpha_shader.location.x = shader.location.x + 250
+            alpha_shader.location.y = shader.location.y - 150
+            alpha_shader.node_tree = mmd_alpha_shader_grp
+            alpha_shader.inputs[1].default_value = alpha_value
+            material.node_tree.links.new(alpha_shader.inputs[0], outplug)
+            outplug = alpha_shader.outputs[0]
+
+        material_output: bpy.types.ShaderNodeOutputMaterial = __getMaterialOutput(material.node_tree.nodes, "ShaderNodeOutputMaterial")
+        material.node_tree.links.new(material_output.inputs["Surface"], outplug)
+        material_output.location.x = shader.location.x + 500
+        material_output.location.y = shader.location.y - 150
+
+
+def __convertToPrincipledBsdf(material: bpy.types.Material, subsurface: float):
+    node_names = set()
+    for s in (n for n in material.node_tree.nodes if isinstance(n, bpy.types.ShaderNodeGroup)):
+        if s.node_tree.name == "MMDBasicShader":
+            l: bpy.types.NodeLink
+            for l in s.outputs[0].links:
+                to_node = l.to_node
+                # assuming there is no bpy.types.NodeReroute between MMDBasicShader and MMDAlphaShader
+                if isinstance(to_node, bpy.types.ShaderNodeGroup) and to_node.node_tree.name == "MMDAlphaShader":
+                    __switchToPrincipledBsdf(material.node_tree, s, subsurface, node_alpha=to_node)
+                    node_names.add(to_node.name)
+                else:
+                    __switchToPrincipledBsdf(material.node_tree, s, subsurface)
+            node_names.add(s.name)
+        elif s.node_tree.name == "MMDShaderDev":
+            __switchToPrincipledBsdf(material.node_tree, s, subsurface)
+            node_names.add(s.name)
+    # remove MMD shader nodes
+    nodes = material.node_tree.nodes
+    for name in node_names:
+        nodes.remove(nodes[name])
+
+
+def __switchToPrincipledBsdf(node_tree: bpy.types.NodeTree, node_basic: bpy.types.ShaderNodeGroup, subsurface: float, node_alpha: Optional[bpy.types.ShaderNodeGroup] = None):
+    shader: bpy.types.ShaderNodeBsdfPrincipled = node_tree.nodes.new("ShaderNodeBsdfPrincipled")
+    shader.parent = node_basic.parent
+    shader.location.x = node_basic.location.x
+    shader.location.y = node_basic.location.y
+
+    alpha_socket_name = "Alpha"
+    if node_basic.node_tree.name == "MMDShaderDev":
+        node_alpha, alpha_socket_name = node_basic, "Base Alpha"
+        if "Base Tex" in node_basic.inputs and node_basic.inputs["Base Tex"].is_linked:
+            node_tree.links.new(node_basic.inputs["Base Tex"].links[0].from_socket, shader.inputs["Base Color"])
+        elif "Diffuse Color" in node_basic.inputs:
+            shader.inputs["Base Color"].default_value[:3] = node_basic.inputs["Diffuse Color"].default_value[:3]
+    elif "diffuse" in node_basic.inputs:
+        shader.inputs["Base Color"].default_value[:3] = node_basic.inputs["diffuse"].default_value[:3]
+        if node_basic.inputs["diffuse"].is_linked:
+            node_tree.links.new(node_basic.inputs["diffuse"].links[0].from_socket, shader.inputs["Base Color"])
+
+    shader.inputs["IOR"].default_value = 1.0
+    shader.inputs["Subsurface Weight"].default_value = subsurface
+
+    output_links = node_basic.outputs[0].links
+    if node_alpha:
+        output_links = node_alpha.outputs[0].links
+        shader.parent = node_alpha.parent or shader.parent
+        shader.location.x = node_alpha.location.x
+
+        if alpha_socket_name in node_alpha.inputs:
+            if "Alpha" in shader.inputs:
+                shader.inputs["Alpha"].default_value = node_alpha.inputs[alpha_socket_name].default_value
+                if node_alpha.inputs[alpha_socket_name].is_linked:
+                    node_tree.links.new(node_alpha.inputs[alpha_socket_name].links[0].from_socket, shader.inputs["Alpha"])
+            else:
+                shader.inputs["Transmission"].default_value = 1 - node_alpha.inputs[alpha_socket_name].default_value
+                if node_alpha.inputs[alpha_socket_name].is_linked:
+                    node_invert = node_tree.nodes.new("ShaderNodeMath")
+                    node_invert.parent = shader.parent
+                    node_invert.location.x = node_alpha.location.x - 250
+                    node_invert.location.y = node_alpha.location.y - 300
+                    node_invert.operation = "SUBTRACT"
+                    node_invert.use_clamp = True
+                    node_invert.inputs[0].default_value = 1
+                    node_tree.links.new(node_alpha.inputs[alpha_socket_name].links[0].from_socket, node_invert.inputs[1])
+                    node_tree.links.new(node_invert.outputs[0], shader.inputs["Transmission"])
+
+    for l in output_links:
+        node_tree.links.new(shader.outputs[0], l.to_socket)

functions/optimization/remove_doubles.py

@@ -1,3 +1,4 @@
+import traceback
 import bpy
 import numpy as np
 from typing import List, TypedDict, Any, Literal, TypeAlias, cast
@@ -9,6 +10,8 @@ from ...core.common import (
     get_all_meshes,
 )
 from ...core.armature_validation import validate_armature
+import bmesh
+import mathutils
 
 # Constants
 MERGE_ITERATION_COUNT = 20
@@ -19,83 +22,36 @@ ModalReturnType: TypeAlias = Literal['RUNNING_MODAL', 'FINISHED', 'CANCELLED']
 
 class MeshEntry(TypedDict):
     mesh: Object
-    shapekeys: list[str]
-    vertices: int
-    cur_vertex_pass: int
+    shapekeys: list[bpy.types.Object]
 
-def create_duplicate_for_merge(context: Context, mesh: Object, shapekey_name: str) -> Object:
+def create_duplicate_for_merge(context: Context, mesh: Object, shapekey_name: str = "") -> Object:
     """Creates a duplicate mesh object for merge testing"""
-    context.view_layer.objects.active = mesh
+
     bpy.ops.object.mode_set(mode='OBJECT')
     bpy.ops.object.select_all(action='DESELECT')
     mesh.select_set(True)
+    context.view_layer.objects.active = mesh
     bpy.ops.object.duplicate()
-    bpy.ops.object.shape_key_move(type='TOP')
-    
     duplicate = context.view_layer.objects.active
+    
+    if(shapekey_name != ""):
+        for shape in duplicate.data.shape_keys.key_blocks:
+            shape.value = 0
+        duplicate.active_shape_key_index = mesh.data.shape_keys.key_blocks.find(shapekey_name)
+        duplicate.active_shape_key.value = 1
+        bpy.ops.object.shape_key_remove(all=True,apply_mix=True)
         duplicate.name = f"{shapekey_name}_object_is_{mesh.name}"
+    else:
+        duplicate.name = f"object_is_{mesh.name}"
     return duplicate
 
-def process_vertex_merging(mesh_data: bpy.types.Mesh, vertices_original: dict[int, Any], current_vertex: int) -> list[int]:
-    """Process vertex merging and return merged vertex indices"""
-    merged_vertices = []
-    i, j = 0, 0
-    
-    while i < len(vertices_original):
-        if j + 1 > len(mesh_data.vertices):
-            merged_vertices.append(i)
-            j = j - 1
-        elif mesh_data.vertices[j].co.xyz != vertices_original[i]:
-            merged_vertices.append(i)
-            j = j - 1
-        elif vertices_original[i] == vertices_original[current_vertex]:
-            merged_vertices.append(i)
-        i, j = i + 1, j + 1
-    
-    return merged_vertices
-
-def vertex_moves(mesh_data: bpy.types.Mesh, vertex: int) -> bool:
-
-    for shapekey in mesh_data.shape_keys.key_blocks:
-        data: bpy.types.ShapeKey = shapekey
-
-        if data.points[vertex].co.xyz != mesh_data.vertices[vertex].co.xyz:
-            return True
-
-    return False
-
-def merge_vertex_at_index(mesh_data: bpy.types.Mesh, index: int, distance: float):
-
-    select_target_vertex = [False]*len(mesh_data.vertices)
-    select_target_vertex[index] = True
-
-    bpy.ops.object.mode_set(mode='OBJECT')
-    mesh_data.vertices.foreach_set("select",select_target_vertex)
-    bpy.ops.object.mode_set(mode='EDIT')
-    for _ in range(0,20): #for some reason, if using merge to unselected on a vertex, the vertex will only merge to 1 other vertex. so we gotta spam it to fix it.
-        bpy.ops.mesh.remove_doubles(threshold=distance, use_unselected=True, use_sharp_edge_from_normals=False)
+def select_obj(context: Context, obj: Object, target_mode='OBJECT'):
     bpy.ops.object.mode_set(mode='OBJECT')
+    bpy.ops.object.select_all(action='DESELECT')
+    obj.select_set(True)
+    context.view_layer.objects.active = obj
+    bpy.ops.object.mode_set(mode=target_mode)
 
-class AvatarToolkit_OT_RemoveDoublesAdvanced(Operator):
-    bl_idname = "avatar_toolkit.remove_doubles_advanced"
-    bl_label = t("Optimization.remove_doubles_advanced")
-    bl_description = t("Optimization.remove_doubles_advanced_desc")
-    bl_options = {'REGISTER', 'UNDO'}
-
-    @classmethod
-    def poll(cls, context: Context) -> bool:
-        """Check if the operator can be executed"""
-        armature = get_active_armature(context)
-        if not armature:
-            return False
-        valid, _, _ = validate_armature(armature)
-        return valid
-
-    def execute(self, context: Context) -> set[str]:
-        """Execute the advanced remove doubles operator"""
-        context.scene.avatar_toolkit.remove_doubles_advanced = True
-        bpy.ops.avatar_toolkit.remove_doubles('INVOKE_DEFAULT')
-        return {'RUNNING_MODAL'}
 
 class AvatarToolkit_OT_RemoveDoubles(Operator):
     bl_idname = "avatar_toolkit.remove_doubles"
@@ -104,7 +60,7 @@ class AvatarToolkit_OT_RemoveDoubles(Operator):
     bl_options = {'REGISTER', 'UNDO'}
 
     objects_to_do: list[MeshEntry] = []
-
+    merge_distance: bpy.props.FloatProperty(name=t("Optimization.merge_distance"), description=t("Optimization.merge_distance_desc"), default=.001)
     @classmethod
     def poll(cls, context: Context) -> bool:
         """Check if the operator can be executed"""
@@ -117,27 +73,27 @@ class AvatarToolkit_OT_RemoveDoubles(Operator):
     def draw(self, context: Context) -> None:
         """Draw the operator's UI"""
         layout = self.layout
-        layout.prop(context.scene.avatar_toolkit, "remove_doubles_merge_distance")
-        layout.label(text=t("Optimization.remove_doubles_warning"))
-        layout.label(text=t("Optimization.remove_doubles_wait"))
+        layout.prop(self, "merge_distance")
 
     def invoke(self, context: Context, event: Event) -> set[str]:
         """Initialize the operator"""
         logger.info("Starting modal execution of merge doubles safely")
         return context.window_manager.invoke_props_dialog(self)
 
-    def setup_mesh_entry(self, mesh: Object) -> MeshEntry:
+    def setup_mesh_entry(self, context: Context, mesh: Object) -> MeshEntry:
         """Set up mesh entry data structure"""
+        #create shapekey objects to merge doubles on.
+        shapes: list[bpy.types.Object] = []
+        if(mesh.data.shape_keys):
+            for shape in mesh.data.shape_keys.key_blocks:
+                shapes.append(create_duplicate_for_merge(context,mesh,shape.name))
+        else:
+            shapes.append(create_duplicate_for_merge(context,mesh))
         mesh_entry: MeshEntry = {
             "mesh": mesh,
-            "shapekeys": [],
-            "vertices": len(mesh.data.vertices),
-            "cur_vertex_pass": 0
+            "shapekeys": shapes
         }
 
-        if mesh.data.shape_keys:
-            mesh_entry["shapekeys"] = [shape.name for shape in mesh.data.shape_keys.key_blocks]
-        
         return mesh_entry
 
     def execute(self, context: Context) -> set[str]:
@@ -157,7 +113,7 @@ class AvatarToolkit_OT_RemoveDoubles(Operator):
             for mesh in objects:
                 if mesh.data.name not in [obj["mesh"].data.name for obj in self.objects_to_do]:
                     logger.debug(f"Setting up data for object {mesh.name}")
-                    mesh_entry = self.setup_mesh_entry(mesh)
+                    mesh_entry = self.setup_mesh_entry(context, mesh)
                     self.objects_to_do.append(mesh_entry)
 
             context.window_manager.modal_handler_add(self)
@@ -167,148 +123,68 @@ class AvatarToolkit_OT_RemoveDoubles(Operator):
             logger.error(f"Error in execute: {str(e)}")
             return {'CANCELLED'}
 
-    def modify_mesh(self, context: Context, mesh: MeshEntry) -> None:
-        """Basic mesh modification for simple cases"""
-        try:
-            mesh["mesh"].select_set(True)
-            context.view_layer.objects.active = mesh["mesh"]
-            mesh_data = mesh["mesh"].data
-            
-            bpy.ops.object.mode_set(mode='EDIT')
-            bpy.ops.object.mode_set(mode='OBJECT')
-            
-            # Select vertices with different positions in shape keys
-            for index, point in enumerate(mesh["mesh"].active_shape_key.points):
-                if point.co.xyz != mesh_data.shape_keys.key_blocks[0].points[index].co.xyz:
-                    mesh_data.vertices[index].select = True
-                    logger.debug(f"Shapekey has moved vertex at index {index}")
-                    
-            bpy.ops.object.mode_set(mode='EDIT')
-            bpy.ops.object.mode_set(mode='OBJECT')
-            mesh["mesh"].select_set(False)
-            
-        except Exception as e:
-            logger.error(f"Error in modify_mesh: {str(e)}")
-
-    def modify_mesh_advanced(self, context: Context, mesh_entry: MeshEntry) -> int:
-        """Advanced mesh modification with shape key handling"""
-        try:
-            final_merged_vertex_group = []
-            initialized_final = False
-            merge_distance = context.scene.avatar_toolkit.remove_doubles_merge_distance
-
-            for shapekey_name in mesh_entry["shapekeys"]:
-                duplicate = create_duplicate_for_merge(context, mesh_entry["mesh"], shapekey_name)
-                vertices_original = {i: v.co.xyz for i, v in enumerate(duplicate.data.vertices)}
-                
-                
-                merge_vertex_at_index(duplicate.data, mesh_entry["cur_vertex_pass"], merge_distance) #merge the vertex at our pass to find vertices that would merge to our vertex at this shapekey.
-
-                # Process merging
-                merged_vertices = process_vertex_merging(duplicate.data, vertices_original, mesh_entry["cur_vertex_pass"]) # find what vertices actually merged.
-                
-                if not initialized_final:
-                    final_merged_vertex_group = merged_vertices.copy()
-                    initialized_final = True
-                else:
-                    final_merged_vertex_group = [v for v in final_merged_vertex_group if v in merged_vertices] # remove vertices that merged from the list if they didn't merge during this shapkey.
-                bpy.ops.object.delete()
-
-            # Apply final merging
-            if final_merged_vertex_group:
-                self.apply_final_merging(context, mesh_entry, final_merged_vertex_group, merge_distance) # merge all vertices that merged on every shapekey no matter the shapekey during the loop.
-                
-            return len(final_merged_vertex_group)
-            
-        except Exception as e:
-            logger.error(f"Error in modify_mesh_advanced: {str(e)}")
-            return 1
-
-    def apply_final_merging(self, context: Context, mesh_entry: MeshEntry, vertex_group: list[int], merge_distance: float) -> None:
-        """Apply final vertex merging operations"""
-        mesh = mesh_entry["mesh"]
-        context.view_layer.objects.active = mesh
-        mesh.select_set(True)
-        
-        bpy.ops.object.mode_set(mode='OBJECT')
-        select_target_group = [False] * len(mesh.data.vertices)
-        for vertex_index in vertex_group:
-            select_target_group[vertex_index] = True
-            
-        mesh.data.vertices.foreach_set("select", select_target_group)
-        bpy.ops.object.mode_set(mode='EDIT')
-        bpy.ops.mesh.remove_doubles(threshold=merge_distance, use_unselected=False)
-        bpy.ops.object.mode_set(mode='OBJECT')
-
-    def process_simple_mesh(self, context: Context, mesh: MeshEntry, merge_distance: float) -> None:
-        """Process mesh without shapekeys using simple merge operation"""
-        logger.debug(f"Processing mesh without shapekeys: {mesh['mesh'].name}")
-        mesh["mesh"].select_set(True)
-        context.view_layer.objects.active = mesh["mesh"]
-        bpy.ops.object.mode_set(mode='EDIT')
-        mesh["mesh"].data.vertices.foreach_set("select", [False] * len(mesh["mesh"].data.vertices))
-
-        bpy.ops.mesh.select_all(action="INVERT")
-        bpy.ops.mesh.remove_doubles(threshold=merge_distance, use_unselected=False)
-        bpy.ops.object.mode_set(mode='OBJECT')
-        mesh["mesh"].select_set(False)
-
-    def finish_mesh_processing(self, context: Context, mesh: MeshEntry, advanced: bool, merge_distance: float) -> None:
-        """Complete the mesh processing by performing final merge operations"""
-        logger.debug("Finishing mesh processing")
-        mesh["mesh"].select_set(True)
-        context.view_layer.objects.active = mesh["mesh"]
-        bpy.ops.object.mode_set(mode='EDIT')
-        bpy.ops.mesh.select_all(action="INVERT")
-        bpy.ops.mesh.remove_doubles(threshold=merge_distance, use_unselected=False)
-        
-        bpy.ops.object.mode_set(mode='OBJECT')
-        mesh["mesh"].select_set(False)
-
     def modal(self, context: Context, event: Event) -> set[ModalReturnType]:
         """Modal operator execution"""
         try:
-            if not self.objects_to_do:
+            if not self.objects_to_do or len(self.objects_to_do) <= 0:
                 self.report({'INFO'}, t("Optimization.remove_doubles_completed"))
                 logger.info("Finishing modal execution of merge doubles safely")
                 return {'FINISHED'}
             
-            mesh = self.objects_to_do[0]
-            mesh_data = mesh["mesh"].data
-            advanced = context.scene.avatar_toolkit.remove_doubles_advanced
-            merge_distance = context.scene.avatar_toolkit.remove_doubles_merge_distance
+            mesh: MeshEntry = self.objects_to_do.pop(0)
+            merge_distance: float = self.merge_distance
             
-            if len(mesh['shapekeys']) > 0 and not advanced:
-                shapekeyname = mesh['shapekeys'].pop(0)
-                mesh["mesh"].active_shape_key_index = mesh_data.shape_keys.key_blocks.find(shapekeyname)
-                logger.debug(f"Processing shapekey {shapekeyname}")
-                self.modify_mesh(context, mesh)
             
-            elif not mesh_data.shape_keys:
-                self.process_simple_mesh(context, mesh, merge_distance)
-                self.objects_to_do.pop(0)
+            #find which vertices merge on all shapekeys using bmesh, a fast way of doing it - @989onan
+            #final_merged_vertex_group = [i for i in range(0,len(mesh['mesh'].data.vertices))]
+            final_merged_vertex_group: dict[set[int],list[int]] = []
+            for shape in mesh["shapekeys"]:
+                select_obj(context, shape, target_mode='EDIT')
+                bmesh_mesh: bmesh.types.BMesh = bmesh.from_edit_mesh(shape.data)
+                selected_verts: list[bmesh.types.BMVert] = [vert for vert in bmesh_mesh.verts if vert.select == True]
+                i: int = 0
+                merged_vertices: dict[set[int],list[int]] = {} #make a list of sets which act as pairs. the pairs being sets means it doesn't matter if element 0 is at index 1, it is still considered the same pair
+                mergers: dict[bmesh.types.BMVert, bmesh.types.BMVert]
+                for name,mergers in bmesh.ops.find_doubles(bmesh_mesh,verts=selected_verts,dist=merge_distance).items():
+                    for source_vert,target_vert in mergers.items():
+                        pair: set[int] = set()
+                        pair.add(source_vert.index)
+                        pair.add(target_vert.index)
+                        frozen_pair = frozenset(pair)
+                        merged_vertices[frozen_pair] = [source_vert.index,target_vert.index] #put the pairs we have found into a list.
                     
-            elif not (mesh["cur_vertex_pass"] > mesh["vertices"]) and advanced: #advanced merging vertex by vertex
-                if(mesh["cur_vertex_pass"] < 0): #make sure it doesn't go below 0 and explode when advancing backwards from a previous step
-                    mesh["cur_vertex_pass"] = 0
+                if(final_merged_vertex_group == []): #populate list if it is empty
+                    final_merged_vertex_group = merged_vertices
+                new_dict: dict[set[int],list[int]] = {}
 
-                if vertex_moves(mesh["mesh"].data, mesh["cur_vertex_pass"]): # do not do advanced merging for vertices that don't move
-                    mesh["cur_vertex_pass"] -= self.modify_mesh_advanced(context, mesh)-2 #advance forward or backwards based on how many vertices actually got merged, changing the list size.
-                    #if above returns 1 (no vertices other than this one being merged to ourselves), advance by 1. else don't advance or go backwards. Makes sure all vertices get merged in the end.
-                else:
-                    mesh["cur_vertex_pass"] += 1
+                #update our final list, keeping pairs that exist on all shapekeys and not just one.
+                for key,value in final_merged_vertex_group.items():
+                    if key in merged_vertices.keys():
+                        new_dict[key] = value
+                final_merged_vertex_group = new_dict 
             
-            elif (mesh["cur_vertex_pass"] > mesh["vertices"]) and advanced and len(mesh['shapekeys']) > 0: #after advanced merging has gone past all the moving vertices, now we need to merge non moving vertices.
-                shapekeyname = mesh['shapekeys'].pop(0)
-                mesh["mesh"].active_shape_key_index = mesh_data.shape_keys.key_blocks.find(shapekeyname)
-                logger.debug(f"Processing shapekey {shapekeyname}")
-                self.modify_mesh(context, mesh)
-            else:
-                self.finish_mesh_processing(context, mesh, advanced, merge_distance)
-                self.objects_to_do.pop(0)
+            #create an edit mesh and ensure it's vertex table
+            select_obj(context, mesh['mesh'], target_mode='EDIT')
+            data_mesh: bpy.types.Mesh = mesh['mesh'].data
+            mappings: dict[bmesh.types.BMVert,bmesh.types.BMVert] = {}
+            bmesh_mesh: bmesh.types.BMesh = bmesh.from_edit_mesh(data_mesh)
+            bmesh_mesh.verts.ensure_lookup_table()
+
+            #turn our pairs into a dictionary, which allows for merging vertices based on the shared pairs.
+            for key,value in final_merged_vertex_group.items():
+                mappings[bmesh_mesh.verts[value[0]]] = bmesh_mesh.verts[value[1]]
+
+            #weld the verts and update the source mesh
+            bmesh.ops.weld_verts(bmesh_mesh,targetmap=mappings)
+            bmesh.update_edit_mesh(data_mesh, destructive=True)
+
+            #delete the shapekey reading meshes.
+            for shape in mesh["shapekeys"]: 
+                bpy.data.objects.remove(shape)
 
             return {'RUNNING_MODAL'}
             
         except Exception as e:
-            logger.error(f"Error in modal: {str(e)}")
+            print(traceback.format_exception(e))
+            logger.error(f"Error in modal: {traceback.format_exception(e)}")
             return {'CANCELLED'}

functions/tools/general_mesh_tools.py

@@ -1,7 +1,7 @@
 import bpy
 import numpy as np
 from bpy.types import Operator, Context
-from typing import Set
+from typing import Set, Literal
 from ...core.translations import t
 from ...core.logging_setup import logger
 from ...core.common import get_active_armature, get_all_meshes
@@ -99,3 +99,96 @@ class AvatarToolkit_OT_SelectShortestSeamPath(Operator):
     
         return {'FINISHED'}
 
+class AvatarToolkit_OT_ExplodeMesh(Operator):
+    """Explodes the mesh for use with painting programs, or painting inside blender."""
+    bl_idname = "avatar_toolkit.explode_mesh"
+    bl_label = t("Tools.explode_mesh")
+    bl_description = t("Tools.explode_mesh_desc")
+    bl_options = {'REGISTER', 'UNDO'}
+    distance: bpy.props.FloatProperty(default=2.0,name=t("Tools.explode_mesh.distance"),description=t("Tools.explode_mesh.distance_desc"))
+    split_on_seams: bpy.props.BoolProperty(default=True,name=t("Tools.explode_mesh.split_on_seams"),description=t("Tools.explode_mesh.split_on_seams_desc"))
+
+    def draw(self, context: Context) -> None:
+        """Draw the operator's UI"""
+        layout = self.layout
+        layout.prop(self, "distance")
+
+    def invoke(self, context: Context, event: bpy.types.Event) -> set[str]:
+        """Initialize the operator"""
+        return context.window_manager.invoke_props_dialog(self)
+    
+    @classmethod
+    def poll(cls, context: Context) -> bool:
+
+        return context.view_layer.objects.active.type == "MESH" and len(context.view_layer.objects.selected) == 1
+    
+    
+
+    def execute(self, context: Context) -> Set[str]:
+
+        mesh_obj: bpy.types.Object = context.view_layer.objects.active.type
+        mesh: bpy.types.Mesh = context.view_layer.objects.active.data
+        if(self.split_on_seams):
+            
+            #set to correct mode
+            bpy.ops.object.mode_set(mode='EDIT')
+            bpy.ops.mesh.select_mode(type='EDGE')
+
+            #mark seams by islands
+            bpy.ops.mesh.select_all(action="SELECT")
+            bpy.ops.uv.select_all(action="SELECT")
+            bpy.ops.uv.seams_from_islands(mark_seams=True,mark_sharp=False)
+            
+            #clear selection
+            bpy.ops.mesh.select_all(action="DESELECT")
+            bpy.ops.object.mode_set(mode='OBJECT')
+            bm = bmesh.new()   # create an empty BMesh
+            bm.from_mesh(mesh)   # fill it in from active mesh
+
+            #select seam edges
+            for idx,edge in enumerate(bm.edges):
+                edge.select = edge.seam
+            bm.to_mesh(mesh)
+            bm.free()
+
+            #split edges.
+            bpy.ops.object.mode_set(mode='EDIT')
+            bpy.ops.mesh.edge_split()
+        
+        #separate by loose.
+        bpy.ops.object.mode_set(mode='EDIT')
+        bpy.ops.mesh.select_mode(type='FACE')
+        
+        bpy.ops.mesh.select_all(action="SELECT")
+        
+        bpy.ops.mesh.separate(type='LOOSE')
+
+        
+        distance: float = self.distance
+        
+
+        #set origins to geometry
+        bpy.ops.object.mode_set(mode='OBJECT')
+        bpy.ops.object.origin_set(type="ORIGIN_GEOMETRY",center="BOUNDS")
+
+        #store original settings
+        origin_only_orig: bool = context.scene.tool_settings.use_transform_data_origin
+        pos_only_orig: bool = context.scene.tool_settings.use_transform_pivot_point_align
+        parents_only_orig: bool = context.scene.tool_settings.use_transform_skip_children
+        original_pivot: Literal['BOUNDING_BOX_CENTER', 'CURSOR', 'INDIVIDUAL_ORIGINS', 'MEDIAN_POINT', 'ACTIVE_ELEMENT'] = context.scene.tool_settings.transform_pivot_point 
+
+        #set scene settings correctly.
+        context.scene.tool_settings.use_transform_data_origin = False
+        context.scene.tool_settings.use_transform_pivot_point_align = True
+        context.scene.tool_settings.use_transform_skip_children = False
+        context.scene.tool_settings.transform_pivot_point = 'MEDIAN_POINT'
+
+        #spread out separated objects
+        bpy.ops.transform.resize(value=(self.distance, self.distance, self.distance), orient_type='GLOBAL')
+        
+        #restore settings.
+        context.scene.tool_settings.use_transform_data_origin = origin_only_orig
+        context.scene.tool_settings.use_transform_pivot_point_align = pos_only_orig
+        context.scene.tool_settings.use_transform_skip_children = parents_only_orig
+        context.scene.tool_settings.transform_pivot_point = original_pivot
+        return {'FINISHED'}

resources/translations/en_US.json

@@ -128,9 +128,7 @@
     "Optimization.combine_materials": "Combine Materials",
     "Optimization.combine_materials_desc": "Combine similar materials to reduce draw calls",
     "Optimization.remove_doubles": "Remove Doubles",
-    "Optimization.remove_doubles_desc": "Remove duplicate vertices",
-    "Optimization.remove_doubles_advanced": "Advanced",
-    "Optimization.remove_doubles_advanced_desc": "Remove duplicate vertices with advanced options",
+    "Optimization.remove_doubles_desc": "Remove duplicate vertices safely, keeping shapekeys preserved.",
     "Optimization.join_all_meshes": "Join All",
     "Optimization.join_all_meshes_desc": "Join all meshes in the scene",
     "Optimization.join_selected_meshes": "Join Selected",
@@ -158,8 +156,6 @@
     "Optimization.error.join_selected": "Failed to join selected meshes: {error}",
     "Optimization.merge_distance": "Merge Distance",
     "Optimization.merge_distance_desc": "Distance within which vertices will be merged",
-    "Optimization.remove_doubles_warning": "This process may take a long time",
-    "Optimization.remove_doubles_wait": "Blender may seem unresponsive during this operation",
     "Optimization.error.remove_doubles": "Failed to remove doubles: {error}",
     "Optimization.no_armature": "No armature selected",
     "Optimization.processing_mesh": "Processing mesh: {name}",
@@ -219,6 +215,12 @@
     "Tools.clean_weights_threshold_desc": "Minimum weight value to consider a bone as weighted",
     "Tools.find_shortest_seam_path": "Find Shortest Seam Path",
     "Tools.find_shortest_seam_path_desc": "Find shortest path of seams between two selected vertices connected to seams.",
+    "Tools.explode_mesh":"Explode Mesh for Painting",
+    "Tools.explode_mesh_desc": "Explodes the mesh for use with painting programs, or painting inside blender.",
+    "Tools.explode_mesh.distance": "Distance",
+    "Tools.explode_mesh.distance_desc": "Scale factor for distance between exploded items on model.",
+    "Tools.explode_mesh.split_on_seams_desc":"Split model on UV seams to separate islands from each other.",
+    "Tools.explode_mesh.split_on_seams":"Split on Seams",
     "Tools.apply_modifier_on_shapekey_obj":"Apply Modifier on Shapekey Object",
     "Tools.apply_modifier_on_shapekey_obj_desc":"Applies a modifier on an object regardless of it having shapekeys.",
     "Tools.merge_title": "Merge Tools",

ui/optimization_panel.py

@@ -4,7 +4,7 @@ from bpy.types import Panel, Context, UILayout, Operator
 from .main_panel import AvatarToolKit_PT_AvatarToolkitPanel, CATEGORY_NAME
 from ..core.translations import t
 from ..functions.optimization.materials_tools import AvatarToolkit_OT_CombineMaterials
-from ..functions.optimization.remove_doubles import AvatarToolkit_OT_RemoveDoubles,AvatarToolkit_OT_RemoveDoublesAdvanced
+from ..functions.optimization.remove_doubles import AvatarToolkit_OT_RemoveDoubles
 from ..functions.optimization.mesh_tools import AvatarToolkit_OT_JoinAllMeshes, AvatarToolkit_OT_JoinSelectedMeshes
 
 class AvatarToolKit_PT_OptimizationPanel(Panel):
@@ -40,7 +40,6 @@ class AvatarToolKit_PT_OptimizationPanel(Panel):
         # Remove Doubles Row
         row: UILayout = col.row(align=True)
         row.operator(AvatarToolkit_OT_RemoveDoubles.bl_idname, icon='MESH_DATA')
-        row.operator(AvatarToolkit_OT_RemoveDoublesAdvanced.bl_idname, icon='PREFERENCES')
         
         # Join Meshes Box
         join_box: UILayout = layout.box()

ui/tools_panel.py

@@ -18,7 +18,7 @@ from ..functions.tools.bone_tools import (
 from ..functions.tools.standardize_armature import AvatarToolkit_OT_StandardizeArmature
 from ..functions.tools.merge_tools import AvatarToolkit_OT_MergeToActive, AvatarToolkit_OT_MergeToParent, AvatarToolkit_OT_ConnectBones
 from ..functions.tools.rigify_converter import AvatarToolkit_OT_ConvertRigifyToUnity
-from ..functions.tools.general_mesh_tools import AvatarToolkit_OT_SelectShortestSeamPath
+from ..functions.tools.general_mesh_tools import AvatarToolkit_OT_SelectShortestSeamPath, AvatarToolkit_OT_ExplodeMesh
 from ..functions.custom_tools.force_apply_modifier import AvatarToolkit_OT_ApplyModifierForShapkeyObj
 
 class AvatarToolKit_PT_ToolsPanel(Panel):
@@ -68,6 +68,7 @@ class AvatarToolKit_PT_ToolsPanel(Panel):
         col.separator(factor=0.5)
         col.operator(AvatarToolkit_OT_SelectShortestSeamPath.bl_idname,text=t("Tools.find_shortest_seam_path"),icon="MESH_DATA")
         col.operator(AvatarToolkit_OT_ApplyModifierForShapkeyObj.bl_idname,text=t("Tools.apply_modifier_on_shapekey_obj"),icon="SHAPEKEY_DATA")
+        col.operator(AvatarToolkit_OT_ExplodeMesh.bl_idname,text=t("Tools.explode_mesh"),icon="MOD_EXPLODE")
         
         
         # Standardization Tools