mirror of https://github.com/AxioDL/metaforce.git
309 lines
11 KiB
Python
309 lines
11 KiB
Python
'''
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HMDL Export Blender Addon
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By Jack Andersen <jackoalan@gmail.com>
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This Python module provides a generator implementation for
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the 'HMDL' mesh format designed for use with HECL.
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The format features three main sections:
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* Shader table
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* Skin-binding table
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* Mesh table (VBOs [array,element], VAO attribs, drawing index)
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The Shader table provides index-referenced binding points
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for mesh-portions to use for rendering.
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The Skin-binding table provides the runtime with identifiers
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to use in ensuring the correct bone-transformations are bound
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to the shader when rendering a specific primitive.
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The Mesh table contains Vertex and Element buffers with interleaved
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Positions, Normals, UV coordinates, and Weight Vectors
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'''
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import struct, bpy, bmesh
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from mathutils import Vector
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from . import HMDLShader, HMDLSkin, HMDLMesh, HMDLTxtr
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def get_3d_context(object_):
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window = bpy.context.window_manager.windows[0]
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screen = window.screen
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for area in screen.areas:
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if area.type == "VIEW_3D":
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area3d = area
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break
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for region in area3d.regions:
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if region.type == "WINDOW":
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region3d = region
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break
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override = {
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"window": window,
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"screen": screen,
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"area": area3d,
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"region": region3d,
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"object": object_
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}
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return override
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# Generate Skeleton Info structure (free-form tree structure)
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def generate_skeleton_info(armature, endian_char='<'):
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bones = []
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for bone in armature.data.bones:
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bone_bytes = bytearray()
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# Write bone hash
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bone_bytes += struct.pack(endian_char + 'I', hmdl_anim.hashbone(bone.name))
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for comp in bone.head_local:
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bone_bytes += struct.pack(endian_char + 'f', comp)
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parent_idx = -1
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if bone.parent:
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parent_idx = armature.data.bones.find(bone.parent.name)
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bone_bytes += struct.pack(endian_char + 'i', parent_idx)
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bone_bytes += struct.pack(endian_char + 'I', len(bone.children))
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for child in bone.children:
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child_idx = armature.data.bones.find(child.name)
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bone_bytes += struct.pack(endian_char + 'I', child_idx)
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bones.append(bone_bytes)
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# Generate bone tree data
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info_bytes = bytearray()
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info_bytes += struct.pack(endian_char + 'I', len(bones))
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cur_offset = len(bones) * 4 + 4
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for bone in bones:
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info_bytes += struct.pack(endian_char + 'I', cur_offset)
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cur_offset += len(bone)
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for bone in bones:
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info_bytes += bone
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return info_bytes
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# Takes a Blender 'Mesh' object (not the datablock)
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# and performs a one-shot conversion process to HMDL; packaging
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# into the HECL data-pipeline and returning a hash once complete
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def cook(writebuffunc, platform, endianchar):
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print('COOKING HMDL')
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return True
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mesh_obj = bpy.data.objects[bpy.context.scene.hecl_mesh_obj]
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if mesh_obj.type != 'MESH':
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raise RuntimeError("%s is not a mesh" % mesh_obj.name)
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# Partial meshes
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part_meshes = set()
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# Start with shader, mesh and rigging-info generation.
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# Use SHA1 hashing to determine what the ID-hash will be when
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# shaders are packaged; strip out duplicates
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shader_set = []
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rigger = None
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# Normalize all vertex weights
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override = get_3d_context(mesh_obj)
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try:
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bpy.ops.object.vertex_group_normalize_all(override, lock_active=False)
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except:
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pass
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# Copy mesh (and apply mesh modifiers)
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copy_name = mesh_obj.name + "_hmdltri"
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copy_mesh = bpy.data.meshes.new(copy_name)
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copy_obj = bpy.data.objects.new(copy_name, copy_mesh)
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copy_obj.data = mesh_obj.to_mesh(bpy.context.scene, True, 'RENDER')
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copy_obj.scale = mesh_obj.scale
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bpy.context.scene.objects.link(copy_obj)
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# If skinned, establish rigging generator
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if len(mesh_obj.vertex_groups):
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rigger = hmdl_skin.hmdl_skin(max_bone_count, mesh_obj.vertex_groups)
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# Determine count of transformation matricies to deliver to shader set
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actual_max_bone_counts = [1] * len(mesh_obj.data.materials)
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max_bone_count = 1
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for mat_idx in range(len(mesh_obj.data.materials)):
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mat = mesh_obj.data.materials[mat_idx]
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count = hmdl_shader.max_transform_counter(mat, mesh_obj)
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if count > 1:
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actual_max_bone_counts[mat_idx] = count
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if count > max_bone_count:
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max_bone_count = count
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# Sort materials by pass index first
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sorted_material_idxs = []
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source_mat_set = set(range(len(mesh_obj.data.materials)))
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while len(source_mat_set):
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min_mat_idx = source_mat_set.pop()
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source_mat_set.add(min_mat_idx)
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for mat_idx in source_mat_set:
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if mesh_obj.data.materials[mat_idx].pass_index < mesh_obj.data.materials[min_mat_idx].pass_index:
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min_mat_idx = mat_idx
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sorted_material_idxs.append(min_mat_idx)
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source_mat_set.discard(min_mat_idx)
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# Generate shaders
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actual_max_texmtx_count = 0
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for mat_idx in sorted_material_idxs:
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shader_hashes = []
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shader_uv_count = 0
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if mesh_obj.data.hecl_material_count > 0:
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for grp_idx in range(mesh_obj.data.hecl_material_count):
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for mat in bpy.data.materials:
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if mat.name.endswith('_%u_%u' % (grp_idx, mat_idx)):
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hecl_str = hmdl_shader.shader(mat, mesh_obj, bpy.data.filepath)
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else:
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mat = mesh_obj.data.materials[mat_idx]
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hecl_str = hmdl_shader.shader(mat, mesh_obj, bpy.data.filepath)
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mesh_maker = hmdl_mesh.hmdl_mesh()
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# Make special version of mesh with just the relevant material;
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# Also perform triangulation
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mesh = bpy.data.meshes.new(copy_obj.name + '_' + str(mat_idx))
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part_meshes.add(mesh)
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bm = bmesh.new()
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bm.from_mesh(copy_obj.data)
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to_remove = []
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shader_center = Vector((0,0,0))
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shader_center_count = 0
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for face in bm.faces:
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if face.material_index != mat_idx:
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to_remove.append(face)
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else:
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shader_center += face.calc_center_bounds()
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shader_center_count += 1
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shader_center /= shader_center_count
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bmesh.ops.delete(bm, geom=to_remove, context=5)
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bmesh.ops.triangulate(bm, faces=bm.faces)
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bm.to_mesh(mesh)
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bm.free()
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# Optimise mesh
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if rigger:
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mesh_maker.add_mesh(mesh, rigger, shader_uv_count)
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else:
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mesh_maker.add_mesh(mesh, None, shader_uv_count)
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shader_set.append((shader_hashes, mesh_maker, shader_center))
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# Filter out useless AABB points and generate data array
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aabb = bytearray()
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for comp in copy_obj.bound_box[0]:
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aabb += struct.pack(endian_char + 'f', comp)
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for comp in copy_obj.bound_box[6]:
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aabb += struct.pack(endian_char + 'f', comp)
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# Delete copied mesh from scene
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bpy.context.scene.objects.unlink(copy_obj)
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bpy.data.objects.remove(copy_obj)
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bpy.data.meshes.remove(copy_mesh)
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# Count total collections
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total_collections = 0
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for shader in shader_set:
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total_collections += len(shader[1].collections)
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# Start writing master buffer
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output_data = bytearray()
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output_data += aabb
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output_data += struct.pack(endian_char + 'III', mesh_obj.data.hecl_material_count, len(shader_set), total_collections)
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# Shader Reference Data (truncated SHA1 hashes)
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if mesh_obj.data.hecl_material_count > 0:
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for grp_idx in range(mesh_obj.data.hecl_material_count):
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for shader in shader_set:
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output_data += shader[0][grp_idx]
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else:
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for shader in shader_set:
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for subshader in shader[0]:
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output_data += subshader
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# Generate mesh data
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for shader in shader_set:
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mesh_maker = shader[1]
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output_data += struct.pack(endian_char + 'Ifff', len(mesh_maker.collections), shader[2][0], shader[2][1], shader[2][2])
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for coll_idx in range(len(mesh_maker.collections)):
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# Vert Buffer
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uv_count, max_bones, vert_bytes, vert_arr = mesh_maker.generate_vertex_buffer(coll_idx, endian_char)
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output_data += struct.pack(endian_char + 'III', uv_count, max_bones // 4, len(vert_bytes))
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output_data += vert_bytes
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# Elem Buffer
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collection_primitives, element_bytes, elem_arr = mesh_maker.generate_element_buffer(coll_idx, endian_char)
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output_data += struct.pack(endian_char + 'I', len(element_bytes))
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output_data += element_bytes
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# Index Buffer
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index_bytes = mesh_maker.generate_index_buffer(collection_primitives, endian_char, rigger)
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output_data += struct.pack(endian_char + 'I', len(index_bytes))
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output_data += index_bytes
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# Generate rigging data
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skin_info = None
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if rigger:
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skin_info = rigger.generate_rigging_info(endian_char)
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# Write final buffer
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final_data = bytearray()
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final_data = b'HMDL'
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if rigger:
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final_data += struct.pack(endian_char + 'IIII', 1, actual_max_texmtx_count, max_bone_count, len(skin_info))
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final_data += skin_info
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else:
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final_data += struct.pack(endian_char + 'II', 0, actual_max_texmtx_count)
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final_data += output_data
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# Clean up
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for mesh in part_meshes:
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bpy.data.meshes.remove(mesh)
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# Write final mesh object
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if area_db_id is not None:
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new_hash = 0
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else:
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new_hash = heclpak.add_object(final_data, b'HMDL', resource_name)
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res_db.update_resource_stats(db_id, new_hash)
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return db_id, new_hash, final_data
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def draw(layout, context):
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layout.prop_search(context.scene, 'hecl_mesh_obj', context.scene, 'objects')
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if not len(context.scene.hecl_mesh_obj):
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layout.label("Mesh not specified", icon='ERROR')
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elif context.scene.hecl_mesh_obj not in context.scene.objects:
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layout.label("'"+context.scene.hecl_mesh_obj+"' not in scene", icon='ERROR')
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else:
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obj = context.scene.objects[context.scene.hecl_mesh_obj]
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if obj.type != 'MESH':
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layout.label("'"+context.scene.hecl_mesh_obj+"' not a 'MESH'", icon='ERROR')
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layout.prop(obj.data, 'hecl_active_material')
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layout.prop(obj.data, 'hecl_material_count')
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# Debug register operators
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import bpy
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def register():
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bpy.types.Scene.hecl_mesh_obj = bpy.props.StringProperty(
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name='HECL Mesh Object',
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description='Blender Mesh Object to export during HECL\'s cook process')
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bpy.types.Scene.hecl_actor_obj = bpy.props.StringProperty(
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name='HECL Actor Object',
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description='Blender Empty Object to export during HECL\'s cook process')
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bpy.utils.register_class(HMDLShader.hecl_shader_operator)
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pass
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def unregister():
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bpy.utils.unregister_class(HMDLShader.hecl_shader_operator)
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pass
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