blender/io_mspgl/export_mesh.py

   1 import itertools
   2 import os
   3 import bpy
   4 import mathutils
   5
   6 class MeshExporter:
   7         def export_mesh(self, context, mesh_or_obj, progress):
   8                 from .mesh import Mesh, create_mesh_from_object
   9
  10                 if type(mesh_or_obj)==Mesh:
  11                         mesh = mesh_or_obj
  12                 else:
  13                         progress.push_task("", 0.0, 0.9)
  14                         mesh = create_mesh_from_object(context, mesh_or_obj, progress)
  15                         progress.pop_task()
  16
  17                 from .datafile import Resource, Statement, Token
  18                 resource = Resource(mesh.name+".mesh", "mesh")
  19                 statements = resource.statements
  20
  21                 st = Statement("vertices", Token("NORMAL3_BYTE"))
  22                 if mesh.uv_layers and mesh.tangent_vecs:
  23                         st.append(Token("TANGENT3_BYTE"))
  24                 if mesh.vertices[0].color:
  25                         st.append(Token("COLOR4_UBYTE"))
  26                 if mesh.uv_layers:
  27                         for u in mesh.uv_layers:
  28                                 size = str(len(u.uvs[0]))
  29                                 min_val = min(*u.uvs[0])
  30                                 max_val = max(*u.uvs[1])
  31                                 for c in u.uvs:
  32                                         min_val = min(min_val, *c)
  33                                         max_val = max(max_val, *c)
  34                                 uv_type = "USHORT" if min_val>=0.0 and max_val<=1.0 else "FLOAT"
  35                                 if u.unit==0:
  36                                         st.append(Token("TEXCOORD{}_{}".format(size, uv_type)))
  37                                 else:
  38                                         st.append(Token("TEXCOORD{}_{}_{}".format(size, u.unit, uv_type)))
  39                 if mesh.vertex_groups:
  40                         st.append(Token("GROUP{}_UBYTE".format(mesh.max_groups_per_vertex)))
  41                         st.append(Token("WEIGHT{}_USHORT".format(mesh.max_groups_per_vertex)))
  42                 st.append(Token("VERTEX3_FLOAT"))
  43
  44                 normal = None
  45                 color = None
  46                 uvs = [None]*len(mesh.uv_layers)
  47                 tan = None
  48                 group = None
  49                 weight = None
  50                 for v in mesh.vertices:
  51                         if v.normal!=normal:
  52                                 st.sub.append(Statement("normal", *v.normal))
  53                                 normal = v.normal
  54                         if v.color!=color:
  55                                 st.sub.append(Statement("color", *v.color))
  56                                 color = v.color
  57                         for i, u in enumerate(mesh.uv_layers):
  58                                 if v.uvs[i]!=uvs[i]:
  59                                         if u.unit==0:
  60                                                 st.sub.append(Statement("texcoord", *v.uvs[i]))
  61                                         else:
  62                                                 st.sub.append(Statement("multitexcoord", u.unit, *v.uvs[i]))
  63                                         uvs[i] = v.uvs[i]
  64                         if mesh.tangent_vecs:
  65                                 if v.tan!=tan:
  66                                         st.sub.append(Statement("tangent", *v.tan))
  67                                         tan = v.tan
  68                         if mesh.vertex_groups:
  69                                 v_group = [g.group for g in v.groups]
  70                                 v_weight = [g.weight for g in v.groups]
  71                                 if v_group!=group:
  72                                         st.sub.append(Statement("group", *v_group))
  73                                         group = v_group
  74                                 if v_weight!=weight:
  75                                         st.sub.append(Statement("weight", *v_weight))
  76                                         weight = v_weight
  77                         st.sub.append(Statement("vertex", *v.co))
  78
  79                 statements.append(st)
  80
  81                 if mesh.use_strips:
  82                         for s in mesh.vertex_sequence:
  83                                 st = Statement("batch", Token("TRIANGLE_STRIP"))
  84                                 for i in range(0, len(s), 32):
  85                                         st.sub.append(Statement("indices", *(v.index for v in s[i:i+32])))
  86                                 statements.append(st)
  87                 else:
  88                         st = Statement("batch", Token('TRIANGLES'))
  89                         for f in mesh.faces:
  90                                 st.sub.append(Statement("indices", *(v.index for v in f.vertices)))
  91                         statements.append(st)
  92
  93                 if mesh.lines:
  94                         st = Statement("batch", Token('LINES'))
  95                         for l in mesh.lines:
  96                                 st.sub.append(Statement("indices", *(v.index for v in l.vertices)))
  97                         statements.append(st)
  98
  99                 if mesh.winding_test:
 100                         statements.append(Statement("winding", Token('COUNTERCLOCKWISE')))
 101
 102                 progress.set_progress(1.0)
 103
 104                 return resource