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export.py
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export.py
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import bpy
import os
import mathutils
import bmesh
def get_selected_objects():
selected_objects = [o for o in bpy.context.scene.objects if o.select_get()]
return selected_objects
def find_armature():
sel = get_selected_objects()
for o in sel:
if o.type == "ARMATURE":
return o
return None
def get_meshes():
sel = get_selected_objects()
#sel = bpy.context.scene.objects
meshes = []
for o in sel:
if o.type != "MESH":
continue
meshes.append(o)
return meshes
class Exporter():
def __init__(self):
pass
def export_file(self, path):
meshes = get_meshes()
# limit all weights to max 4
#for m in meshes:
# m.select_set(True)
# bpy.ops.object.mode_set(mode="WEIGHT_PAINT")
# bpy.ops.object.vertex_group_limit_total(limit=4)
# bpy.ops.object.mode_set(mode="OBJECT")
# m.select_set(False)
amt_ob = find_armature()
# deselect all
for obj in bpy.data.objects:
obj.select_set(False)
# add armature if there's none
if amt_ob is None:
bpy.ops.object.armature_add()
amt_ob = bpy.context.scene.objects['Armature']
for m in meshes:
m.select_set(True)
amt_ob.select_set(True)
bpy.ops.object.parent_set(type='ARMATURE_AUTO')
#raise Exception("No armature found")
amt = amt_ob.data
with open(path, "w", encoding="utf-8") as f:
f.write("MODEL\n")
f.write("VERSION 6\n\n")
f.write("NUMBONES %d\n" % ( len(amt.bones) ))
table = {}
for index, b in enumerate(amt.bones):
parent_index = -1
if b.parent is not None:
parent_index = table[b.parent.name]
f.write("BONE %d %d \"%s\"\n" % (index, parent_index, b.name))
table[b.name] = index
f.write("\n")
for index, b in enumerate(amt.bones):
f.write("BONE %d\n" % (index))
m = b.matrix_local
f.write("OFFSET %f, %f, %f\n" % (m[0][3], m[1][3], m[2][3]))
f.write("SCALE 1.000000, 1.000000, 1.000000\n")
f.write("X %f, %f, %f\n" % (m[0][0], m[1][0], m[2][0]))
f.write("Y %f, %f, %f\n" % (m[0][1], m[1][1], m[2][1]))
f.write("Z %f, %f, %f\n" % (m[0][2], m[1][2], m[2][2]))
f.write("\n")
numverts = 0
numfaces = 0
for mesh in meshes:
numverts += len(mesh.data.vertices)
numfaces += len(mesh.data.polygons)
f.write("NUMVERTS %d\n" % (numverts))
# TODO FIXME: if the vertex group name doesn't match the bone name
total = 0
for mesh in meshes:
vgtable = {}
for gr in mesh.vertex_groups:
vgtable[gr.index] = gr.name
for index, v in enumerate(mesh.data.vertices):
f.write("VERT %d\n" % (index + total))
f.write("OFFSET %f, %f, %f\n" % (v.co.x, v.co.y, v.co.z))
vgroups = []
for vg in v.groups:
group_name = vgtable[vg.group]
if not group_name in table:
continue
vgroups.append([group_name, vg.weight])
if len(vgroups) == 0:
raise Exception("Empty vgroups for %s" % (mesh))
f.write("BONES %d\n" % (len(vgroups)))
for group_name, weight in vgroups:
f.write("BONE %d %f\n" % (table[group_name], weight))
f.write("\n")
total += len(mesh.data.vertices)
total = 0
f.write("NUMFACES %d\n" % (numfaces))
for mesh_index, mesh in enumerate(meshes):
for face in mesh.data.polygons:
f.write("TRI %d %d 0 0\n" % (mesh_index, mesh_index))
for v, l in zip(face.vertices, face.loop_indices):
f.write("VERT %d\n" % (v + total))
n = mesh.data.vertices[v].normal
uv = mesh.data.uv_layers.active.data[l].uv
f.write("NORMAL %f %f %f\n" % (n.x, n.y, n.z))
f.write("COLOR 1.000000 1.000000 1.000000 1.000000\n")
f.write("UV 1 %f %f\n" % (uv.x, 1.0 - uv.y))
total += len(mesh.data.vertices)
f.write("\n")
f.write("NUMOBJECTS %d\n" % (len(meshes)))
for mesh_index, mesh in enumerate(meshes):
f.write("OBJECT %d \"%s\"\n" % (mesh_index, mesh.name))
f.write("\n")
# https://blender.stackexchange.com/questions/80773/how-to-get-the-name-of-image-of-image-texture-with-python
def get_image_for_object(obj):
for s in obj.material_slots:
if s.material and s.material.use_nodes:
for n in s.material.node_tree.nodes:
if n.type == 'TEX_IMAGE':
return (s.material, n.image.name, n.image.filepath)
return None
# TODO FIXME don't write them based off of objects/meshes and don't write duplicates
f.write("NUMMATERIALS %d\n" % (len(meshes)))
for mesh_index, mesh in enumerate(meshes):
img = get_image_for_object(mesh)
if img is None:
f.write("MATERIAL %d \"material_%d\" \"Phong\" \"%s\"\n" % (mesh_index, mesh_index, ""))
else:
f.write("MATERIAL %d \"%s\" \"Phong\" \"%s\"\n" % (mesh_index, img[0].name, img[1]))
f.write("COLOR 0.000000 0.000000 0.000000 1.000000\n")
f.write("TRANSPARENCY 0.000000 0.000000 0.000000 1.000000\n")
f.write("AMBIENTCOLOR 0.000000 0.000000 0.000000 1.000000\n")
f.write("INCANDESCENCE 0.000000 0.000000 0.000000 1.000000\n")
f.write("COEFFS 0.800000 0.000000\n")
f.write("GLOW 0.000000 0\n")
f.write("REFRACTIVE 6 1.000000\n")
f.write("SPECULARCOLOR -1.000000 -1.000000 -1.000000 1.000000\n")
f.write("REFLECTIVECOLOR -1.000000 -1.000000 -1.000000 1.000000\n")
f.write("REFLECTIVE -1 -1.000000\n")
f.write("BLINN -1.000000 -1.000000\n")
f.write("PHONG -1.000000\n")
f.write("\n")
f.close()