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Support concatinating multiple glTF files.
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Syoyo Fujita
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5dcf778b31
commit
6224e021ce
@ -6,12 +6,21 @@ Append(merge) mesh of glTF A to glTF B.
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`skin`, `nodes`, etc are not appended(to be merged).
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## Usage
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concatenate sourceN.gltf to target.gltf and save it to merged.gltf
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```
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$ python concat_mesh.py source0.gltf <source1.gltf source2.gltf ...> target.gltf merged.gltf
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```
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## TODO
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* [ ] Support multiple glTFs to merge
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* [x] Support multiple glTFs to merge(concat)
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* [ ] Support merging skin
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* [ ] Support merging different node hierarchies
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* [ ] `images`, `textures`
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* [ ] Support `images`, `textures`, `materials`
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* [ ] Support other glTF info
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# replace_attrib.py
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@ -1,20 +1,116 @@
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# concat mesh to glTF
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# support multiple source glTF to me concatenated to target.gltf
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import json
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import sys, os
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prefix = "added/"
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g_prefix = "added/"
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def concat(source, target, offsets, prefix, extraInfo):
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# Args:
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# source: dict(modified), target: dict(modified),
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# offsets: dict(modified). contains offset table.
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# prefix: str
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# extraInfo: dict(inout)
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num_source_meshes = len(source["meshes"])
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num_source_buffers = len(source["buffers"])
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num_source_bufferViews = len(source["bufferViews"])
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num_source_accessors = len(source["accessors"])
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num_source_materials = len(source["materials"]) if "materials" in source else 0
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print("src =====")
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print("num_src_meshes: ", num_source_meshes)
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print("num_src_buffers: ", num_source_buffers)
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print("num_src_bufferViews: ", num_source_bufferViews)
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print("num_src_accessors: ", num_source_accessors)
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print("num_src_materials: ", num_source_materials)
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#
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# Adjust name and index offset
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#
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for i in range(len(source["buffers"])):
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if "name" in source["buffers"][i]:
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source["buffers"][i]["name"] = prefix + source["buffers"][i]["name"]
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for i in range(len(source["bufferViews"])):
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if "name" in source["bufferViews"][i]:
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source["bufferViews"][i]["name"] = prefix + source["bufferViews"][i]["name"]
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source["bufferViews"][i]["buffer"] += offsets["buffers"]
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for i in range(len(source["accessors"])):
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if "name" in source["accessors"][i]:
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source["accessors"][i]["name"] = prefix + source["accessors"][i]["name"]
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source["accessors"][i]["bufferView"] += offsets["bufferViews"]
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for i in range(len(source["meshes"])):
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mesh = source["meshes"][i]
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if "name" in mesh:
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source["meshes"][i]["name"] = prefix + source["meshes"][i]["name"]
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for primid in range(len(mesh["primitives"])):
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for attrib in mesh["primitives"][primid]["attributes"]:
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#print(source["meshes"][i]["primitives"][primid]["attributes"][attrib])
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source["meshes"][i]["primitives"][primid]["attributes"][attrib] += offsets["accessors"]
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source["meshes"][i]["primitives"][primid]["indices"] += offsets["accessors"]
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if "material" in source["meshes"][i]["primitives"][primid]:
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source["meshes"][i]["primitives"][primid]["material"] += offsets["materials"]
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#
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# Append mesh info
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#
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target["buffers"] += source["buffers"]
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target["bufferViews"] += source["bufferViews"]
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target["meshes"] += source["meshes"]
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target["accessors"] += source["accessors"]
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if "materials" in source:
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target["materials"] += source["materials"]
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# assume `prefix` is unique
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extraInfo["num_{}_meshes".format(prefix)] = num_source_meshes
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extraInfo["num_{}_buffers".format(prefix)] = num_source_buffers
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extraInfo["num_{}_bufferViews".format(prefix)] = num_source_bufferViews
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extraInfo["num_{}_accessors".format(prefix)] = num_source_accessors
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extraInfo["num_{}_materials".format(prefix)] = num_source_materials
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# update offsets
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offsets["meshes"] += num_source_meshes
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offsets["buffers"] += num_source_buffers
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offsets["bufferViews"] += num_source_bufferViews
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offsets["accessors"] += num_source_accessors
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offsets["materials"] += num_source_materials
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def main():
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if len(sys.argv) < 4:
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print("Needs source.gltf target.gltf output.gltf")
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print("Needs source0.gltf <source1.gltf, ...> target.gltf output.gltf")
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sys.exit(-1)
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source_filename = sys.argv[1]
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target_filename = sys.argv[2]
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output_filename = sys.argv[3]
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num_args = len(sys.argv)
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print("num_args = ", num_args)
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source = json.loads(open(source_filename).read())
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source_filenames = []
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num_srcs = num_args - 3
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for i in range(num_srcs):
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source_filenames.append(sys.argv[1+i])
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print("source[{}] = {}".format(i, sys.argv[1+i]))
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target_filename = sys.argv[num_args - 2]
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output_filename = sys.argv[num_args - 1]
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print("target = ", target_filename)
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print("output = ", output_filename)
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sources = []
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for i in range(num_srcs):
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sources.append(json.loads(open(source_filenames[i]).read()))
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target = json.loads(open(target_filename).read())
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num_target_meshes = len(target["meshes"])
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@ -28,65 +124,8 @@ def main():
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print("num_target_accessors: ", num_target_accessors)
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print("num_target_materials: ", num_target_accessors)
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num_source_meshes = len(source["meshes"])
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num_source_buffers = len(source["buffers"])
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num_source_bufferViews = len(source["bufferViews"])
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num_source_accessors = len(source["accessors"])
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num_source_materials = len(source["materials"]) if "materials" in source else 0
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print("num_source_meshes: ", num_source_meshes)
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print("num_source_buffers: ", num_source_buffers)
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print("num_source_bufferViews: ", num_source_bufferViews)
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print("num_source_accessors: ", num_source_accessors)
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print("num_source_materials: ", num_source_materials)
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#
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# Adjust name and index
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#
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for i in range(len(source["buffers"])):
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if "name" in source["buffers"][i]:
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source["buffers"][i]["name"] = prefix + source["buffers"][i]["name"]
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for i in range(len(source["bufferViews"])):
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if "name" in source["bufferViews"][i]:
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source["bufferViews"][i]["name"] = prefix + source["bufferViews"][i]["name"]
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source["bufferViews"][i]["buffer"] += num_target_buffers
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for i in range(len(source["accessors"])):
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if "name" in source["accessors"][i]:
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source["accessors"][i]["name"] = prefix + source["accessors"][i]["name"]
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source["accessors"][i]["bufferView"] += num_target_bufferViews
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for i in range(len(source["meshes"])):
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mesh = source["meshes"][i]
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if "name" in mesh:
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source["meshes"][i]["name"] = prefix + source["meshes"][i]["name"]
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for primid in range(len(mesh["primitives"])):
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for attrib in mesh["primitives"][primid]["attributes"]:
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#print(source["meshes"][i]["primitives"][primid]["attributes"][attrib])
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source["meshes"][i]["primitives"][primid]["attributes"][attrib] += num_target_accessors
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source["meshes"][i]["primitives"][primid]["indices"] += num_target_accessors
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if "material" in source["meshes"][i]["primitives"][primid]:
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source["meshes"][i]["primitives"][primid]["material"] += num_target_materials
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#
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# Append mesh info
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#
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target["buffers"] += source["buffers"]
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target["bufferViews"] += source["bufferViews"]
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target["meshes"] += source["meshes"]
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target["accessors"] += source["accessors"]
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if "materials" in source:
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target["materials"] += source["materials"]
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#
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# add some info
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# add some info to asset.extras
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#
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extraInfo = {}
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extraInfo["num_target_meshes"] = num_target_meshes
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@ -95,11 +134,24 @@ def main():
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extraInfo["num_target_accessors"] = num_target_accessors
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extraInfo["num_target_materials"] = num_target_materials
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extraInfo["num_source_meshes"] = num_source_meshes
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extraInfo["num_source_buffers"] = num_source_buffers
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extraInfo["num_source_bufferViews"] = num_source_bufferViews
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extraInfo["num_source_accessors"] = num_source_accessors
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extraInfo["num_source_materials"] = num_source_materials
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offsets = {}
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offsets["meshes"] = num_target_meshes
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offsets["buffers"] = num_target_buffers
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offsets["bufferViews"] = num_target_bufferViews
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offsets["accessors"] = num_target_accessors
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offsets["materials"] = num_target_materials
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for i in range(num_srcs):
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source = sources[i]
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prefix = g_prefix + "{}/".format(source_filenames[i])
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concat(source, target, offsets, prefix, extraInfo)
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extraInfo["num_total_meshes"] = offsets["meshes"]
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extraInfo["num_total_buffers"] = offsets["buffers"]
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extraInfo["num_total_bufferViews"] = offsets["bufferViews"]
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extraInfo["num_total_accessors"] = offsets["accessors"]
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extraInfo["num_total_materials"] = offsets["materials"]
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target["asset"]["extras"] = extraInfo
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