luboslenco
496 lines
16 KiB
Python
496 lines
16 KiB
Python
"""Armory Mesh Exporter"""
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#
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# Based on Open Game Engine Exchange
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# https://opengex.org/
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# Export plugin for Blender by Eric Lengyel
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# Copyright 2015, Terathon Software LLC
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#
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# This software is licensed under the Creative Commons
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# Attribution-ShareAlike 3.0 Unported License:
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# http://creativecommons.org/licenses/by-sa/3.0/deed.en_US
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import io
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import os
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import struct
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import time
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import bpy
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from bpy_extras.io_utils import ExportHelper
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from mathutils import Vector
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import numpy as np
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bl_info = {
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"name": "Armory Mesh Exporter",
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"category": "Import-Export",
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"location": "File -> Export",
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"description": "Armory mesh data",
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"author": "Armory3D.org",
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"version": (2025, 8, 0),
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"blender": (4, 3, 1),
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"doc_url": "",
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"tracker_url": "",
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}
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NodeTypeMesh = 1
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structIdentifier = ["object", "mesh_object"]
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class ArmoryExporter(bpy.types.Operator, ExportHelper):
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"""Export to Armory format"""
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bl_idname = "export_scene.arm"
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bl_label = "Export Armory"
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filename_ext = ".arm"
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def execute(self, context):
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profile_time = time.time()
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current_frame = context.scene.frame_current
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current_subframe = context.scene.frame_subframe
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self.scene = context.scene
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self.output = {}
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self.bobjectArray = {}
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self.meshArray = {}
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self.depsgraph = context.evaluated_depsgraph_get()
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scene_objects = self.scene.collection.all_objects
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for bobject in scene_objects:
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if not bobject.parent:
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self.process_bobject(bobject)
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self.output["name"] = self.scene.name
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self.output["objects"] = []
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for bo in scene_objects:
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if not bo.parent:
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self.export_object(bo, self.scene)
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self.output["mesh_datas"] = []
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for o in self.meshArray.items():
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self.export_mesh(o)
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self.output["camera_datas"] = None
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self.output["camera_ref"] = None
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self.output["material_datas"] = None
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self.output["shader_datas"] = None
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self.output["world_datas"] = None
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self.output["world_ref"] = None
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self.output["speaker_datas"] = None
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self.output["embedded_datas"] = None
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self.write_arm(self.filepath, self.output)
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self.scene.frame_set(current_frame, subframe=current_subframe)
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print(f"Scene exported in {str(time.time() - profile_time)}")
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return {"FINISHED"}
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def write_arm(self, filepath, output):
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with open(filepath, "wb") as f:
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f.write(packb(output))
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def write_matrix(self, matrix):
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return [
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matrix[0][0],
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matrix[0][1],
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matrix[0][2],
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matrix[0][3],
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matrix[1][0],
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matrix[1][1],
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matrix[1][2],
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matrix[1][3],
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matrix[2][0],
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matrix[2][1],
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matrix[2][2],
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matrix[2][3],
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matrix[3][0],
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matrix[3][1],
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matrix[3][2],
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matrix[3][3],
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]
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def process_bobject(self, bobject):
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if bobject.type not in ["MESH"]:
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return
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btype = NodeTypeMesh if bobject.type == "MESH" else 0
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self.bobjectArray[bobject] = {"objectType": btype, "structName": bobject.name}
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for subbobject in bobject.children:
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self.process_bobject(subbobject)
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def export_object(self, bobject, scene, parento=None):
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if bobjectRef := self.bobjectArray.get(bobject):
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o = {}
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o["name"] = bobjectRef["structName"]
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o["type"] = structIdentifier[bobjectRef["objectType"]]
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o["data_ref"] = None
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o["transform"] = self.write_matrix(bobject.matrix_local)
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o["dimensions"] = None
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o["visible"] = True
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o["spawn"] = True
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o["anim"] = None
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o["material_ref"] = None
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o["children"] = None
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if bobjectRef["objectType"] == NodeTypeMesh:
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objref = bobject.data
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if objref not in self.meshArray:
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self.meshArray[objref] = {
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"structName": objref.name,
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"objectTable": [bobject],
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}
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else:
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self.meshArray[objref]["objectTable"].append(bobject)
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oid = self.meshArray[objref]["structName"]
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o["data_ref"] = oid
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o["dimensions"] = self.calc_aabb(bobject)
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if parento is None:
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self.output["objects"].append(o)
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else:
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parento["children"].append(o)
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if not hasattr(o, "children") and len(bobject.children) > 0:
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o["children"] = []
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for subbobject in bobject.children:
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self.export_object(subbobject, scene, o)
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def calc_aabb(self, bobject):
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aabb_center = 0.125 * sum((Vector(b) for b in bobject.bound_box), Vector())
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return [
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abs(
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(bobject.bound_box[6][0] - bobject.bound_box[0][0]) / 2
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+ abs(aabb_center[0])
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)
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* 2,
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abs(
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(bobject.bound_box[6][1] - bobject.bound_box[0][1]) / 2
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+ abs(aabb_center[1])
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)
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* 2,
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abs(
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(bobject.bound_box[6][2] - bobject.bound_box[0][2]) / 2
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+ abs(aabb_center[2])
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)
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* 2,
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]
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def export_mesh_data(self, exportMesh, bobject, o, has_armature=False):
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exportMesh.calc_loop_triangles()
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loops = exportMesh.loops
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num_verts = len(loops)
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num_uv_layers = len(exportMesh.uv_layers)
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num_colors = len(exportMesh.vertex_colors)
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has_tex = num_uv_layers > 0
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has_tex1 = num_uv_layers > 1
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has_col = num_colors > 0
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has_tang = False
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# Scale for packed coords
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aabb = self.calc_aabb(bobject)
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maxdim = max(aabb[0], max(aabb[1], aabb[2]))
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if maxdim > 2:
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o["scale_pos"] = maxdim / 2
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else:
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o["scale_pos"] = 1.0
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pdata = np.empty(num_verts * 4, dtype="<f4") # p.xyz, n.z
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ndata = np.empty(num_verts * 2, dtype="<f4") # n.xy
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if has_tex:
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t0map = 0 # Get active uvmap
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t0data = np.empty(num_verts * 2, dtype="<f4")
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uv_layers = exportMesh.uv_layers
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if uv_layers is not None:
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for i in range(0, len(uv_layers)):
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if uv_layers[i].active_render:
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t0map = i
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break
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if has_tex1:
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t1map = 1 if t0map == 0 else 0
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t1data = np.empty(num_verts * 2, dtype="<f4")
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# Scale for packed coords
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maxdim = 1.0
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lay0 = uv_layers[t0map]
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for v in lay0.data:
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if abs(v.uv[0]) > maxdim:
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maxdim = abs(v.uv[0])
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if abs(v.uv[1]) > maxdim:
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maxdim = abs(v.uv[1])
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if has_tex1:
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lay1 = uv_layers[t1map]
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for v in lay1.data:
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if abs(v.uv[0]) > maxdim:
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maxdim = abs(v.uv[0])
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if abs(v.uv[1]) > maxdim:
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maxdim = abs(v.uv[1])
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if maxdim > 1:
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o["scale_tex"] = maxdim
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invscale_tex = (1 / o["scale_tex"]) * 32767
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else:
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o["scale_tex"] = 1.0
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invscale_tex = 1 * 32767
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if has_tang:
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exportMesh.calc_tangents(uvmap=lay0.name)
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tangdata = np.empty(num_verts * 4, dtype="<f4")
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if has_col:
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cdata = np.empty(num_verts * 4, dtype="<f4")
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scale_pos = o["scale_pos"]
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invscale_pos = (1 / scale_pos) * 32767
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verts = exportMesh.vertices
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if has_tex:
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lay0 = exportMesh.uv_layers[t0map]
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if has_tex1:
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lay1 = exportMesh.uv_layers[t1map]
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if has_col:
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vcol0 = exportMesh.vertex_colors[0].data
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for i, loop in enumerate(loops):
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v = verts[loop.vertex_index]
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co = v.co
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normal = loop.normal
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tang = loop.tangent
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i4 = i * 4
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i2 = i * 2
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pdata[i4] = co[0]
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pdata[i4 + 1] = co[1]
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pdata[i4 + 2] = co[2]
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pdata[i4 + 3] = normal[2] * scale_pos # Cancel scale
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ndata[i2] = normal[0]
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ndata[i2 + 1] = normal[1]
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if has_tex:
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uv = lay0.data[loop.index].uv
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t0data[i2] = uv[0]
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t0data[i2 + 1] = 1.0 - uv[1] # Reverse Y
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if has_tex1:
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uv = lay1.data[loop.index].uv
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t1data[i2] = uv[0]
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t1data[i2 + 1] = 1.0 - uv[1]
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if has_tang:
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i4 = i * 4
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tangdata[i4] = tang[0]
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tangdata[i4 + 1] = tang[1]
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tangdata[i4 + 2] = tang[2]
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if has_col:
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col = vcol0[loop.index].color
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i4 = i * 4
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cdata[i4] = col[0]
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cdata[i4 + 1] = col[1]
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cdata[i4 + 2] = col[2]
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cdata[i4 + 3] = col[3]
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# Pack
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pdata *= invscale_pos
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ndata *= 32767
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pdata = np.array(pdata, dtype="<i2")
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ndata = np.array(ndata, dtype="<i2")
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if has_tex:
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t0data *= invscale_tex
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t0data = np.array(t0data, dtype="<i2")
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if has_tex1:
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t1data *= invscale_tex
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t1data = np.array(t1data, dtype="<i2")
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if has_col:
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cdata *= 32767
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cdata = np.array(cdata, dtype="<i2")
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if has_tang:
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tangdata *= 32767
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tangdata = np.array(tangdata, dtype="<i2")
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# Output
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o["vertex_arrays"] = []
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o["vertex_arrays"].append(
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{"attrib": "pos", "data": "short4norm", "values": pdata}
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)
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o["vertex_arrays"].append(
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{"attrib": "nor", "data": "short2norm", "values": ndata}
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)
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if has_tex:
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o["vertex_arrays"].append(
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{"attrib": "tex", "data": "short2norm", "values": t0data}
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)
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if has_tex1:
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o["vertex_arrays"].append(
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{"attrib": "tex1", "data": "short2norm", "values": t1data}
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)
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if has_col:
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o["vertex_arrays"].append(
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{"attrib": "col", "data": "short4norm", "values": cdata}
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)
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if has_tang:
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o["vertex_arrays"].append(
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{
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"attrib": "tang",
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"data": "short4norm",
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"values": tangdata,
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}
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)
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mats = exportMesh.materials
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poly_map = []
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for i in range(max(len(mats), 1)):
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poly_map.append([])
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for poly in exportMesh.polygons:
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poly_map[poly.material_index].append(poly)
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# map polygon indices to triangle loops
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tri_loops = {}
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for loop in exportMesh.loop_triangles:
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if loop.polygon_index not in tri_loops:
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tri_loops[loop.polygon_index] = []
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tri_loops[loop.polygon_index].append(loop)
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for index, polys in enumerate(poly_map):
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tris = 0
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for poly in polys:
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tris += poly.loop_total - 2
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if tris == 0: # No face assigned
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continue
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prim = np.empty(tris * 3, dtype="<i4")
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i = 0
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for poly in polys:
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for loop in tri_loops[poly.index]:
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prim[i] = loops[loop.loops[0]].index
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prim[i + 1] = loops[loop.loops[1]].index
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prim[i + 2] = loops[loop.loops[2]].index
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i += 3
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o["index_array"] = prim
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def export_mesh(self, objectRef):
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# This function exports a single mesh object
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table = objectRef[1]["objectTable"]
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bobject = table[0]
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oid = objectRef[1]["structName"]
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o = {}
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o["name"] = oid
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armature = bobject.find_armature()
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apply_modifiers = not armature
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bobject_eval = (
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bobject.evaluated_get(self.depsgraph) if apply_modifiers else bobject
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)
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exportMesh = bobject_eval.to_mesh()
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self.export_mesh_data(exportMesh, bobject, o, has_armature=armature is not None)
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self.output["mesh_datas"].append(o)
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bobject_eval.to_mesh_clear()
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def menu_func(self, context):
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self.layout.operator(ArmoryExporter.bl_idname, text="Armory (.arm)")
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def register():
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bpy.utils.register_class(ArmoryExporter)
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bpy.types.TOPBAR_MT_file_export.append(menu_func)
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def unregister():
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bpy.types.TOPBAR_MT_file_export.remove(menu_func)
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bpy.utils.unregister_class(ArmoryExporter)
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if __name__ == "__main__":
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register()
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# Msgpack parser with typed arrays
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# Based on u-msgpack-python v2.4.1 - v at sergeev.io
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# https://github.com/vsergeev/u-msgpack-python
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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def _pack_integer(obj, fp):
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fp.write(b"\xd2" + struct.pack("<i", obj))
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def _pack_nil(fp):
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fp.write(b"\xc0")
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def _pack_boolean(obj, fp):
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fp.write(b"\xc3" if obj else b"\xc2")
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def _pack_float(obj, fp):
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fp.write(b"\xca" + struct.pack("<f", obj))
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def _pack_string(obj, fp):
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obj = obj.encode("utf-8")
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fp.write(b"\xdb" + struct.pack("<I", len(obj)) + obj)
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def _pack_binary(obj, fp):
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fp.write(b"\xc6" + struct.pack("<I", len(obj)) + obj)
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def _pack_array(obj, fp):
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fp.write(b"\xdd" + struct.pack("<I", len(obj)))
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if len(obj) > 0 and isinstance(obj[0], float):
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fp.write(b"\xca")
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for e in obj:
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fp.write(struct.pack("<f", e))
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elif len(obj) > 0 and isinstance(obj[0], bool):
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for e in obj:
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pack(e, fp)
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elif len(obj) > 0 and isinstance(obj[0], int):
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fp.write(b"\xd2")
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for e in obj:
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fp.write(struct.pack("<i", e))
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# Float32
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elif len(obj) > 0 and isinstance(obj[0], np.float32):
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fp.write(b"\xca")
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fp.write(obj.tobytes())
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# Int32
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elif len(obj) > 0 and isinstance(obj[0], np.int32):
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fp.write(b"\xd2")
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fp.write(obj.tobytes())
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# Int16
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elif len(obj) > 0 and isinstance(obj[0], np.int16):
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fp.write(b"\xd1")
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fp.write(obj.tobytes())
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# Regular
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else:
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for e in obj:
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pack(e, fp)
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def _pack_map(obj, fp):
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fp.write(b"\xdf" + struct.pack("<I", len(obj)))
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for k, v in obj.items():
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pack(k, fp)
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pack(v, fp)
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def pack(obj, fp):
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if obj is None:
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_pack_nil(fp)
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elif isinstance(obj, bool):
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_pack_boolean(obj, fp)
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elif isinstance(obj, int):
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_pack_integer(obj, fp)
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elif isinstance(obj, float):
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_pack_float(obj, fp)
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elif isinstance(obj, str):
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_pack_string(obj, fp)
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elif isinstance(obj, bytes):
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_pack_binary(obj, fp)
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elif isinstance(obj, (list, np.ndarray, tuple)):
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_pack_array(obj, fp)
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elif isinstance(obj, dict):
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_pack_map(obj, fp)
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def packb(obj):
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fp = io.BytesIO()
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pack(obj, fp)
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return fp.getvalue()
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