blender/io_mspgl/export_mesh.py

   1 import itertools
   2 import os
   3 import bpy
   4 import mathutils
   5
   6 class MeshExporter:
   7         def __init__(self):
   8                 self.show_progress = True
   9                 self.export_all = False
  10
  11         def export_to_file(self, context, out_fn):
  12                 if self.export_all:
  13                         objs = [o for o in context.selected_objects if o.type=="MESH"]
  14                 else:
  15                         objs = [context.active_object]
  16
  17                 from .util import Progress
  18
  19                 path, base = os.path.split(out_fn)
  20                 base, ext = os.path.splitext(base)
  21
  22                 progress = Progress(self.show_progress and context)
  23                 for i, obj in enumerate(objs):
  24                         if self.export_all:
  25                                 out_fn = os.path.join(path, obj.data.name+ext)
  26
  27                         progress.push_task_slice(obj.data.name, i, len(objs))
  28                         resource = self.export_mesh(context, obj, progress)
  29
  30                         resource.write_to_file(out_fn)
  31                         progress.pop_task()
  32
  33         def export_mesh(self, context, mesh_or_obj, progress):
  34                 from .mesh import Mesh, create_mesh_from_object
  35
  36                 if type(mesh_or_obj)==Mesh:
  37                         mesh = mesh_or_obj
  38                 else:
  39                         progress.push_task("", 0.0, 0.9)
  40                         mesh = create_mesh_from_object(context, mesh_or_obj, progress)
  41                         progress.pop_task()
  42
  43                 from .datafile import Resource, Statement, Token
  44                 resource = Resource(mesh.name+".mesh", "mesh")
  45                 statements = resource.statements
  46
  47                 st = Statement("vertices", Token("NORMAL3"))
  48                 if mesh.vertices[0].color:
  49                         st.append(Token("COLOR4_UBYTE"))
  50                 if mesh.uv_layers:
  51                         for u in mesh.uv_layers:
  52                                 size = str(len(u.uvs[0]))
  53                                 if u.unit==0:
  54                                         st.append(Token("TEXCOORD"+size))
  55                                 else:
  56                                         st.append(Token("TEXCOORD{}_{}".format(size, u.unit)))
  57                         if mesh.tangent_vecs:
  58                                 st.append(Token("TANGENT3"))
  59                 if mesh.vertex_groups:
  60                         st.append(Token("GROUP{}".format(mesh.max_groups_per_vertex)))
  61                         st.append(Token("WEIGHT{}".format(mesh.max_groups_per_vertex)))
  62                 st.append(Token("VERTEX3"))
  63
  64                 normal = None
  65                 color = None
  66                 uvs = [None]*len(mesh.uv_layers)
  67                 tan = None
  68                 group = None
  69                 weight = None
  70                 for v in mesh.vertices:
  71                         if v.normal!=normal:
  72                                 st.sub.append(Statement("normal", *v.normal))
  73                                 normal = v.normal
  74                         if v.color!=color:
  75                                 st.sub.append(Statement("color", *v.color))
  76                                 color = v.color
  77                         for i, u in enumerate(mesh.uv_layers):
  78                                 if v.uvs[i]!=uvs[i]:
  79                                         if u.unit==0:
  80                                                 st.sub.append(Statement("texcoord", *v.uvs[i]))
  81                                         else:
  82                                                 st.sub.append(Statement("multitexcoord", u.unit, *v.uvs[i]))
  83                                         uvs[i] = v.uvs[i]
  84                         if mesh.tangent_vecs:
  85                                 if v.tan!=tan:
  86                                         st.sub.append(Statement("tangent", *v.tan))
  87                                         tan = v.tan
  88                         if mesh.vertex_groups:
  89                                 v_group = [g.group for g in v.groups]
  90                                 v_weight = [g.weight for g in v.groups]
  91                                 if v_group!=group:
  92                                         st.sub.append(Statement("group", *v_group))
  93                                         group = v_group
  94                                 if v_weight!=weight:
  95                                         st.sub.append(Statement("weight", *v_weight))
  96                                         weight = v_weight
  97                         st.sub.append(Statement("vertex", *v.co))
  98
  99                 statements.append(st)
 100
 101                 if mesh.use_strips:
 102                         for s in mesh.vertex_sequence:
 103                                 st = Statement("batch", Token("TRIANGLE_STRIP"))
 104                                 for i in range(0, len(s), 32):
 105                                         st.sub.append(Statement("indices", *(v.index for v in s[i:i+32])))
 106                                 statements.append(st)
 107                 else:
 108                         st = Statement("batch", Token('TRIANGLES'))
 109                         for f in mesh.faces:
 110                                 st.sub.append(Statement("indices", *(v.index for v in f.vertices)))
 111                         statements.append(st)
 112
 113                 if mesh.lines:
 114                         st = Statement("batch", Token('LINES'))
 115                         for l in mesh.lines:
 116                                 st.sub.append(Statement("indices", *(v.index for v in l.vertices)))
 117                         statements.append(st)
 118
 119                 if mesh.winding_test:
 120                         statements.append(Statement("winding", Token('COUNTERCLOCKWISE')))
 121
 122                 progress.set_progress(1.0)
 123
 124                 return resource