add_mesh_extra_objects/add_mesh_star.py

   1 # GPL Original by Fourmadmen
   2
   3 import bpy
   4 from mathutils import (
   5         Vector,
   6         Quaternion,
   7         )
   8 from math import pi
   9 from bpy.props import (
  10         IntProperty,
  11         FloatProperty,
  12         StringProperty,
  13         BoolProperty,
  14         )
  15 from bpy_extras import object_utils
  16
  17 # Create a new mesh (object) from verts/edges/faces.
  18 # verts/edges/faces ... List of vertices/edges/faces for the
  19 #                       new mesh (as used in from_pydata)
  20 # name ... Name of the new mesh (& object)
  21
  22 def create_mesh_object(context, verts, edges, faces, name):
  23
  24     # Create new mesh
  25     mesh = bpy.data.meshes.new(name)
  26
  27     # Make a mesh from a list of verts/edges/faces.
  28     mesh.from_pydata(verts, edges, faces)
  29
  30     # Update mesh geometry after adding stuff.
  31     mesh.update()
  32
  33     from bpy_extras import object_utils
  34     return object_utils.object_data_add(context, mesh, operator=None)
  35
  36
  37 # A very simple "bridge" tool.
  38
  39 def createFaces(vertIdx1, vertIdx2, closed=False, flipped=False):
  40     faces = []
  41
  42     if not vertIdx1 or not vertIdx2:
  43         return None
  44
  45     if len(vertIdx1) < 2 and len(vertIdx2) < 2:
  46         return None
  47
  48     fan = False
  49     if (len(vertIdx1) != len(vertIdx2)):
  50         if (len(vertIdx1) == 1 and len(vertIdx2) > 1):
  51             fan = True
  52         else:
  53             return None
  54
  55     total = len(vertIdx2)
  56
  57     if closed:
  58         # Bridge the start with the end.
  59         if flipped:
  60             face = [
  61                 vertIdx1[0],
  62                 vertIdx2[0],
  63                 vertIdx2[total - 1]]
  64             if not fan:
  65                 face.append(vertIdx1[total - 1])
  66             faces.append(face)
  67
  68         else:
  69             face = [vertIdx2[0], vertIdx1[0]]
  70             if not fan:
  71                 face.append(vertIdx1[total - 1])
  72             face.append(vertIdx2[total - 1])
  73             faces.append(face)
  74
  75     # Bridge the rest of the faces.
  76     for num in range(total - 1):
  77         if flipped:
  78             if fan:
  79                 face = [vertIdx2[num], vertIdx1[0], vertIdx2[num + 1]]
  80             else:
  81                 face = [vertIdx2[num], vertIdx1[num],
  82                         vertIdx1[num + 1], vertIdx2[num + 1]]
  83             faces.append(face)
  84         else:
  85             if fan:
  86                 face = [vertIdx1[0], vertIdx2[num], vertIdx2[num + 1]]
  87             else:
  88                 face = [vertIdx1[num], vertIdx2[num],
  89                         vertIdx2[num + 1], vertIdx1[num + 1]]
  90             faces.append(face)
  91
  92     return faces
  93
  94
  95 # @todo Clean up vertex&face creation process a bit.
  96
  97 def add_star(points, outer_radius, inner_radius, height):
  98     PI_2 = pi * 2
  99     z_axis = (0, 0, 1)
 100
 101     verts = []
 102     faces = []
 103
 104     segments = points * 2
 105
 106     half_height = height / 2.0
 107
 108     vert_idx_top = len(verts)
 109     verts.append(Vector((0.0, 0.0, half_height)))
 110
 111     vert_idx_bottom = len(verts)
 112     verts.append(Vector((0.0, 0.0, -half_height)))
 113
 114     edgeloop_top = []
 115     edgeloop_bottom = []
 116
 117     for index in range(segments):
 118         quat = Quaternion(z_axis, (index / segments) * PI_2)
 119
 120         if index % 2:
 121             # Uneven
 122             radius = outer_radius
 123         else:
 124             # Even
 125             radius = inner_radius
 126
 127         edgeloop_top.append(len(verts))
 128         vec = quat @ Vector((radius, 0, half_height))
 129         verts.append(vec)
 130
 131         edgeloop_bottom.append(len(verts))
 132         vec = quat @ Vector((radius, 0, -half_height))
 133         verts.append(vec)
 134
 135     faces_top = createFaces([vert_idx_top], edgeloop_top, closed=True)
 136     faces_outside = createFaces(edgeloop_top, edgeloop_bottom, closed=True)
 137     faces_bottom = createFaces([vert_idx_bottom], edgeloop_bottom,
 138         flipped=True, closed=True)
 139
 140     faces.extend(faces_top)
 141     faces.extend(faces_outside)
 142     faces.extend(faces_bottom)
 143
 144     return verts, faces
 145
 146
 147 class AddStar(bpy.types.Operator, object_utils.AddObjectHelper):
 148     bl_idname = "mesh.primitive_star_add"
 149     bl_label = "Simple Star"
 150     bl_description = "Construct a star mesh"
 151     bl_options = {'REGISTER', 'UNDO', 'PRESET'}
 152
 153     Star : BoolProperty(name = "Star",
 154                 default = True,
 155                 description = "Star")
 156     change : BoolProperty(name = "Change",
 157                 default = False,
 158                 description = "change Star")
 159
 160     points: IntProperty(
 161         name="Points",
 162         description="Number of points for the star",
 163         min=2,
 164         max=256,
 165         default=5
 166         )
 167     outer_radius: FloatProperty(
 168         name="Outer Radius",
 169         description="Outer radius of the star",
 170         min=0.01,
 171         max=9999.0,
 172         default=1.0
 173         )
 174     innter_radius: FloatProperty(
 175         name="Inner Radius",
 176         description="Inner radius of the star",
 177         min=0.01,
 178         max=9999.0,
 179         default=0.5
 180         )
 181     height: FloatProperty(name="Height",
 182         description="Height of the star",
 183         min=0.01,
 184         max=9999.0,
 185         default=0.5
 186         )
 187
 188     def draw(self, context):
 189         layout = self.layout
 190
 191         layout.prop(self, 'points', expand=True)
 192         layout.prop(self, 'outer_radius', expand=True)
 193         layout.prop(self, 'innter_radius', expand=True)
 194         layout.prop(self, 'height', expand=True)
 195
 196         if self.change == False:
 197             col = layout.column(align=True)
 198             col.prop(self, 'align', expand=True)
 199             col = layout.column(align=True)
 200             col.prop(self, 'location', expand=True)
 201             col = layout.column(align=True)
 202             col.prop(self, 'rotation', expand=True)
 203
 204     def execute(self, context):
 205         # turn off 'Enter Edit Mode'
 206         use_enter_edit_mode = bpy.context.preferences.edit.use_enter_edit_mode
 207         bpy.context.preferences.edit.use_enter_edit_mode = False
 208
 209         if bpy.context.mode == "OBJECT":
 210             if context.selected_objects != [] and context.active_object and \
 211                 (context.active_object.data is not None) and ('Star' in context.active_object.data.keys()) and \
 212                 (self.change == True):
 213                 obj = context.active_object
 214                 oldmesh = obj.data
 215                 oldmeshname = obj.data.name
 216                 verts, faces = add_star(
 217                         self.points,
 218                         self.outer_radius,
 219                         self.innter_radius,
 220                         self.height
 221                         )
 222                 mesh = bpy.data.meshes.new('Star')
 223                 mesh.from_pydata(verts, [], faces)
 224                 obj.data = mesh
 225                 for material in oldmesh.materials:
 226                     obj.data.materials.append(material)
 227                 bpy.data.meshes.remove(oldmesh)
 228                 obj.data.name = oldmeshname
 229             else:
 230                 verts, faces = add_star(
 231                         self.points,
 232                         self.outer_radius,
 233                         self.innter_radius,
 234                         self.height
 235                         )
 236                 mesh = bpy.data.meshes.new('Star')
 237                 mesh.from_pydata(verts, [], faces)
 238                 obj = object_utils.object_data_add(context, mesh, operator=self)
 239
 240             obj.data["Star"] = True
 241             obj.data["change"] = False
 242             for prm in StarParameters():
 243                 obj.data[prm] = getattr(self, prm)
 244
 245         if bpy.context.mode == "EDIT_MESH":
 246             active_object = context.active_object
 247             name_active_object = active_object.name
 248             bpy.ops.object.mode_set(mode='OBJECT')
 249             verts, faces = add_star(
 250                         self.points,
 251                         self.outer_radius,
 252                         self.innter_radius,
 253                         self.height
 254                         )
 255             mesh = bpy.data.meshes.new('Star')
 256             mesh.from_pydata(verts, [], faces)
 257             obj = object_utils.object_data_add(context, mesh, operator=self)
 258             obj.select_set(True)
 259             active_object.select_set(True)
 260             bpy.context.view_layer.objects.active = active_object
 261             bpy.ops.object.join()
 262             context.active_object.name = name_active_object
 263             bpy.ops.object.mode_set(mode='EDIT')
 264
 265         if use_enter_edit_mode:
 266             bpy.ops.object.mode_set(mode = 'EDIT')
 267
 268         # restore pre operator state
 269         bpy.context.preferences.edit.use_enter_edit_mode = use_enter_edit_mode
 270
 271         return {'FINISHED'}
 272
 273 def StarParameters():
 274     StarParameters = [
 275         "points",
 276         "outer_radius",
 277         "innter_radius",
 278         "height",
 279         ]
 280     return StarParameters