我正在尝试为 Blender 2.6x 编写一个简单的 JSON 导出器，因为我能找到的唯一一个 ( http://code.google.com/p/blender-machete/ ) 不适用于 2.6。我从搅拌机中获取顶点、法线和索引没有任何问题，但尽我所能，我似乎无法弄清楚为什么纹理坐标出现错误。纹理似乎在一个简单的立方体的表面上对角倾斜，并且拉伸......真的很丑而且错误。我一直在网上寻找一些官方出口商的来源，但我仍然无法弄清楚，所以我希望有人能给我一些提示或解决方案。
我用来访问纹理坐标的代码是这样的：
# add texture coordinates to scene_data structure
m = bpy.context.active_object.to_mesh(bpy.context.scene, True, 'PREVIEW')
for j in range(len(m.tessfaces)):
if len(m.tessface_uv_textures) > 0:
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv1.x )
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv1.y )
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv2.x )
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv2.y )
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv3.x )
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv3.y )
这给了我一个纹理坐标列表，但不知何故我做错了，因为我上面解释的纹理外观不正确。
除了显示代码，我不知道还能做什么，因为我已经尝试以我能想到的各种方式对其进行更改，所以这是上面代码片段所在的函数：
def get_json(objects, scene):
""" Currently only supports one scene.
Exports with -Z forward, Y up. """
scene_data = []
mesh_number = -1
# iterate over each mesh
for i in range(len(bpy.data.objects)):
if bpy.data.objects[i].type == 'MESH':
mesh_number += 1
bpy.ops.object.mode_set(mode='OBJECT')
# convert all the mesh's faces to triangles
bpy.data.objects[i].select = True
bpy.context.scene.objects.active = bpy.data.objects[i]
bpy.ops.object.mode_set(mode='EDIT')
bpy.ops.mesh.select_all(action='SELECT')
bpy.ops.mesh.quads_convert_to_tris()
bpy.context.scene.update()
bpy.ops.object.mode_set(mode='OBJECT')
bpy.data.objects[i].select = False
# add data to scene_data structure
scene_data.append({
"name" : bpy.data.objects[i].name,
"vertices" : [],
"indices" : [],
"normals" : [],
"tex_coords" : []
})
# iterate over all the vertices in the mesh
for j in range(len(bpy.data.objects[i].data.vertices)):
# add vertex to scene_data structure
scene_data[mesh_number]["vertices"].append( bpy.data.objects[i].data.vertices[j].co.x + bpy.data.objects[i].location.x )
scene_data[mesh_number]["vertices"].append( bpy.data.objects[i].data.vertices[j].co.z + bpy.data.objects[i].location.z )
scene_data[mesh_number]["vertices"].append( -(bpy.data.objects[i].data.vertices[j].co.y + bpy.data.objects[i].location.y) )
# add vertex normal to scene_data structure
scene_data[mesh_number]["normals"].append( bpy.data.objects[i].data.vertices[j].normal.x )
scene_data[mesh_number]["normals"].append( bpy.data.objects[i].data.vertices[j].normal.z )
scene_data[mesh_number]["normals"].append( -(bpy.data.objects[i].data.vertices[j].normal.y) )
# iterate over each face in the mesh
for j in range(len(bpy.data.objects[i].data.polygons)):
verts_in_face = bpy.data.objects[i].data.polygons[j].vertices[:]
# iterate over each vertex in the face
for k in range(len(verts_in_face)):
# twiddle index for -Z forward, Y up
index = k
if index == 1: index = 2
elif index == 2: index = 1
# twiddle index so we draw triangles counter-clockwise
if index == 0: index = 2
elif index == 2: index = 0
# add index to scene_data structure
scene_data[mesh_number]["indices"].append( verts_in_face[index] )
# add texture coordinates to scene_data structure
m = bpy.context.active_object.to_mesh(bpy.context.scene, True, 'PREVIEW')
for j in range(len(m.tessfaces)):
if len(m.tessface_uv_textures) > 0:
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv1.x )
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv1.y )
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv2.x )
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv2.y )
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv3.x )
scene_data[mesh_number]["tex_coords"].append( m.tessface_uv_textures.active.data[j].uv3.y )
return json.dumps(scene_data, indent=4)
有人会告诉我我做错了什么吗？我已经在这几天了，没有任何进展。