解决问题
在Blender的Edit模式下，没有针对顶点色的便捷选中/修改功能。
使用方法
- 进入Edit模式
- 选中顶点
- 使用Get获取选择的顶点的顶点色/手动设置一个顶点色
- 点击Apply将顶点色运用到选中的所有顶点上
auto pick color 功能可以自动获取当前选中顶点的顶点色
鼠标右键也可以吸色/填色
下载
你也可以直接复制下面的代码，放到VertexColorEditor.py中，然后使用blender的插件管理器进行导入
import bpy
import bmesh
from bpy.props import FloatVectorProperty, BoolProperty
from bpy.types import Panel, Operator, Menu
bl_info = {
"name": "Vertex Color Editor",
"blender": (4, 2, 4),
"category": "Mesh",
"version": (1, 0, 0),
"author": "Kani",
"description": "Edit vertex colors with alpha in Edit mode",
}
class MESH_OT_apply_vertex_color(Operator):
"""应用顶点颜色到选中的顶点"""
bl_idname = "mesh.apply_vertex_color"
bl_label = "Apply Color to Selected Vertices"
bl_options = {'REGISTER', 'UNDO'}
@classmethod
def poll(cls, context):
return (context.mode == 'EDIT_MESH' and
context.active_object and
context.active_object.type == 'MESH')
def execute(self, context):
obj = context.active_object
props = context.scene.vertex_color_props
# 获取bmesh
bm = bmesh.from_edit_mesh(obj.data)
bm.faces.ensure_lookup_table()
bm.verts.ensure_lookup_table()
# 确保有顶点颜色层
if not bm.loops.layers.color:
bm.loops.layers.color.new("Col")
color_layer = bm.loops.layers.color.active
# 获取选中的顶点
selected_verts = [v for v in bm.verts if v.select]
if not selected_verts:
self.report({'WARNING'}, "没有选中的顶点")
return {'CANCELLED'}
# 应用颜色到选中顶点的所有loop，包括alpha
color_to_apply = props.vertex_color
for face in bm.faces:
for loop in face.loops:
if loop.vert.select:
loop[color_layer] = color_to_apply
# 更新网格
bmesh.update_edit_mesh(obj.data)
self.report({'INFO'}, f"已应用颜色到 {len(selected_verts)} 个顶点")
return {'FINISHED'}
class MESH_OT_get_vertex_color(Operator):
"""获取选中顶点的颜色"""
bl_idname = "mesh.get_vertex_color"
bl_label = "Get Color from Selected Vertex"
bl_options = {'REGISTER'}
@classmethod
def poll(cls, context):
return (context.mode == 'EDIT_MESH' and
context.active_object and
context.active_object.type == 'MESH')
def execute(self, context):
obj = context.active_object
props = context.scene.vertex_color_props
# 获取bmesh
bm = bmesh.from_edit_mesh(obj.data)
bm.faces.ensure_lookup_table()
bm.verts.ensure_lookup_table()
# 检查是否有顶点颜色层
if not bm.loops.layers.color:
self.report({'WARNING'}, "网格没有顶点颜色层")
return {'CANCELLED'}
color_layer = bm.loops.layers.color.active
# 获取第一个选中顶点的颜色
for face in bm.faces:
for loop in face.loops:
if loop.vert.select:
color = loop[color_layer]
props.vertex_color = (color[0], color[1], color[2], color[3])
self.report({'INFO'}, f"已获取顶点颜色: RGBA({color[0]:.3f}, {color[1]:.3f}, {color[2]:.3f}, {color[3]:.3f})")
return {'FINISHED'}
self.report({'WARNING'}, "没有选中的顶点")
return {'CANCELLED'}
class VertexColorProperties(bpy.types.PropertyGroup):
"""顶点颜色属性"""
vertex_color: FloatVectorProperty(
name="Vertex Color",
description="顶点颜色(包含Alpha)",
subtype='COLOR',
default=(1.0, 1.0, 1.0, 1.0),
min=0.0,
max=1.0,
size=4
)
auto_pick_color: BoolProperty(
name="Auto Pick Color",
description="自动拾取选中顶点的颜色",
default=False
)
class VIEW3D_PT_vertex_color_panel(Panel):
"""顶点颜色编辑面板"""
bl_label = "Vertex Color Editor"
bl_idname = "VIEW3D_PT_vertex_color"
bl_space_type = 'VIEW_3D'
bl_region_type = 'UI'
bl_category = "Vertex Color"
@classmethod
def poll(cls, context):
return (context.mode == 'EDIT_MESH' and
context.active_object and
context.active_object.type == 'MESH')
def draw(self, context):
layout = self.layout
props = context.scene.vertex_color_props
# 自动拾取开关
layout.prop(props, "auto_pick_color", text="Auto Pick Color")
# 颜色属性（包含alpha）
col = layout.column()
# 使用分离的行来更好地控制布局
row = col.row()
row.prop(props, "vertex_color", text="")
# 显示RGBA值
color = props.vertex_color
col.separator()
# 显示具体的RGBA数值
box = col.box()
grid = box.grid_flow(columns=4, align=True)
grid.label(text=f"R: {color[0]:.3f}")
grid.label(text=f"G: {color[1]:.3f}")
grid.label(text=f"B: {color[2]:.3f}")
grid.label(text=f"A: {color[3]:.3f}")
# 按钮
col.separator()
# 添加图标到按钮
row = col.row()
row.operator("mesh.get_vertex_color", text="Get", icon='EYEDROPPER')
row.operator("mesh.apply_vertex_color", text="Apply", icon='BRUSH_DATA')
#row = col.row()
def draw_vertex_color_menu(self, context):
"""在编辑模式右键菜单中添加顶点颜色选项"""
if context.mode == 'EDIT_MESH':
layout = self.layout
layout.separator()
layout.operator("mesh.get_vertex_color", text="Pick Vertex Color", icon='EYEDROPPER')
layout.operator("mesh.apply_vertex_color", text="Apply Vertex Color", icon='BRUSH_DATA')
# 自动更新处理器
def selection_update_handler(scene, depsgraph):
"""当选择改变时自动获取顶点颜色"""
context = bpy.context
props = scene.vertex_color_props
# 检查是否启用了自动拾取
if not props.auto_pick_color:
return
if (context.mode != 'EDIT_MESH' or
not context.active_object or
context.active_object.type != 'MESH'):
return
obj = context.active_object
try:
# 获取bmesh
bm = bmesh.from_edit_mesh(obj.data)
# 检查是否有顶点颜色层
if not bm.loops.layers.color:
return
color_layer = bm.loops.layers.color.active
# 获取第一个选中顶点的颜色
for face in bm.faces:
for loop in face.loops:
if loop.vert.select:
color = loop[color_layer]
# 避免递归更新
if (abs(props.vertex_color[0] - color[0]) > 0.001 or
abs(props.vertex_color[1] - color[1]) > 0.001 or
abs(props.vertex_color[2] - color[2]) > 0.001 or
abs(props.vertex_color[3] - color[3]) > 0.001):
props.vertex_color = (color[0], color[1], color[2], color[3])
return
except:
pass
classes = (
VertexColorProperties,
MESH_OT_apply_vertex_color,
MESH_OT_get_vertex_color,
VIEW3D_PT_vertex_color_panel,
)
def register():
for cls in classes:
bpy.utils.register_class(cls)
bpy.types.Scene.vertex_color_props = bpy.props.PointerProperty(type=VertexColorProperties)
# 添加右键菜单
bpy.types.VIEW3D_MT_edit_mesh_context_menu.append(draw_vertex_color_menu)
# 添加选择更新处理器
if selection_update_handler not in bpy.app.handlers.depsgraph_update_post:
bpy.app.handlers.depsgraph_update_post.append(selection_update_handler)
def unregister():
# 移除选择更新处理器
if selection_update_handler in bpy.app.handlers.depsgraph_update_post:
bpy.app.handlers.depsgraph_update_post.remove(selection_update_handler)
# 移除右键菜单
bpy.types.VIEW3D_MT_edit_mesh_context_menu.remove(draw_vertex_color_menu)
del bpy.types.Scene.vertex_color_props
for cls in reversed(classes):
bpy.utils.unregister_class(cls)
if __name__ == "__main__":
register()