233 lines
6.5 KiB
GDScript
233 lines
6.5 KiB
GDScript
# https://xrfragment.org"
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# SPDX-License-Identifier: MPL-2.0"
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extends Node
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class_name XRF
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var scene
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var isModelLoading = false
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var metadata
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var callback: Callable;
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var Type = {
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"isColor": "^#([a-fA-F0-9]{6}|[a-fA-F0-9]{3})$",
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"isInt": "^[0-9]+$",
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"isFloat": "^[0-9]+%.[0-9]+$",
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"isVector": "([,]+|%w)"
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}
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# Called when the node enters the scene tree for the first time.
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func _ready():
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pass # Replace with function body.
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# Called every frame. 'delta' is the elapsed time since the previous frame.
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func _process(delta):
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pass
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####################################################################################################
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# URI Related functions
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####################################################################################################
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func parseURL(url: String) -> Dictionary:
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var URI = {}
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# Split URL by '://' to get protocol and the rest of the URL
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var parts = url.split("://")
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if parts.size() > 1:
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URI["protocol"] = parts[0]
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url = parts[1]
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else:
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URI["protocol"] = "http" # Default to http if protocol is missing
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# Split URL by '/' to separate domain, path, and file
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parts = url.split("/")
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URI["domain"] = parts[0]
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if parts.size() > 1:
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var path_and_file = parts[1]
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var path_and_file_parts = path_and_file.split("/")
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if path_and_file_parts.size() > 1:
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URI["path"] = path_and_file_parts
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var file = path_and_file_parts.pop_back()
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URI["path"] = path_and_file_parts.join("/")
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else:
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URI["path"] = path_and_file
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# Check if there's a query string
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if url.find("?") != -1:
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parts = url.split("?")
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URI["path"] = parts[0]
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var args = parts[1]
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if args.find("#"):
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args = args.split("#")[0]
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URI["query"] = parseArgs(args)
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else:
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URI["query"] = {}
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# Check if there's a fragment
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if url.find("#") != -1:
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parts = url.split("#")
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URI["fragment"] = parseArgs(parts[1])
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else:
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URI["fragment"] = {}
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return URI
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func parseArgs(fragment: String) -> Dictionary:
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var ARG = {}
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# Split fragment by '&' to separate items
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var items = fragment.split("&")
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for item in items:
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# Split item by '=' to separate key and value
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var key_value = item.split("=")
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if key_value.size() > 1:
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ARG[key_value[0]] = guess_type(key_value[1])
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else:
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ARG[key_value[0]] = ""
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return ARG
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func guess_type(str: String) -> Dictionary:
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var v = {
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"string": str,
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"x": null,
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"y": null,
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"color":null,
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"float": null,
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"int": null
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}
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var parts = str.split(",")
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if parts.size() > 1:
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v.x = parts[0].to_int()
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v.y = parts[1].to_int()
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if parts.size() > 2:
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v.z = parts[2].to_int()
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if str.match(Type.isColor):
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v.color = str
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if str.match(Type.isFloat):
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v.float = str.to_float()
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if str.match(Type.isInt):
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v.int = str.to_int()
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return v
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####################################################################################################
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# Model Related functions
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####################################################################################################
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# Download model by HTTP and run `downloadModelSuccess` if OK
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func to(url, f:Callable ):
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print("loading "+url)
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callback = f
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var http_request = HTTPRequest.new()
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add_child(http_request)
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http_request.request_completed.connect(downloadModelSuccess)
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var error = http_request.request(url)
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if error != OK:
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push_error("An error occurred in the HTTP request.")
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func downloadModelSuccess(result, response_code, headers, body):
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# TODO: here different parsing functions should be called
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# based on the filetype (glb,gltf,ade,obj e.g.)
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loadModelFromBufferByGLTFDocument(body)
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_parseXRFMetadata(scene)
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traverse( scene, _parseXRFMetadata )
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# setup actions & embeds
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traverse( scene, init_href )
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traverse( scene, init_src )
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callback.call("scene_loaded", scene)
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func loadModelFromBufferByGLTFDocument(body):
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print("loadModelFromBuffer")
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var doc = GLTFDocument.new()
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var state = GLTFState.new()
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#state.set_handle_binary_image(GLTFState.HANDLE_BINARY_EMBED_AS_BASISU) # Fixed in new Godot version (4.3 as I see) https://github.com/godotengine/godot/blob/17e7f85c06366b427e5068c5b3e2940e27ff5f1d/scene/resources/portable_compressed_texture.cpp#L116
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var error = doc.append_from_buffer(body, "", state)
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if error == OK:
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scene = doc.generate_scene(state)
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metadata = _parseMetadata(state,scene)
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add_child(scene)
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print("model added")
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else:
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print("Couldn't load glTF scene (error code: %s). Are you connected to internet?" % error_string(error))
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func _parseXRFMetadata(node:Node):
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if node.has_meta("extras"):
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var extras = node.get_meta("extras")
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var XRF = {}
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for i in extras:
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if typeof(extras[i]) == TYPE_STRING:
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XRF[ i ] = parseURL( extras[i] )
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node.set_meta("XRF", XRF)
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func traverse(node, f:Callable ):
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for N in node.get_children():
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if N.get_child_count() > 0:
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f.call(N)
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self.traverse(N,f)
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else:
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f.call(N)
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func _parseMetadata(state: GLTFState, scene: Node) -> Error:
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#var meta = new Dictionary()
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# Add metadata to materials
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var materials_json : Array = state.json.get("materials", [])
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var materials : Array[Material] = state.get_materials()
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for i in materials_json.size():
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if materials_json[i].has("extras"):
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materials[i].set_meta("extras", materials_json[i]["extras"])
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# Add metadata to ImporterMeshes
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var meshes_json : Array = state.json.get("meshes", [])
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var meshes : Array[GLTFMesh] = state.get_meshes()
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for i in meshes_json.size():
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if meshes_json[i].has("extras"):
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meshes[i].mesh.set_meta("extras", meshes_json[i]["extras"])
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# Add metadata to scene
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var scenes_json : Array = state.json.get("scenes", [])
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if scenes_json[0].has("extras"):
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scene.set_meta("extras", scenes_json[0]["extras"])
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# Add metadata to nodes
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var nodes_json : Array = state.json.get("nodes", [])
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for i in nodes_json.size():
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if nodes_json[i].has("extras"):
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var name = nodes_json[i]["name"].replace(".","_")
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var node = scene.find_child(name) #state.get_scene_node(i)
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if node:
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node.set_meta( "extras", nodes_json[i]["extras"] )
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else:
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print(name+" could not be found")
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return OK
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func posToTransform3D(v:Dictionary):
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var pos = Vector3()
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if !v.x:
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var node:Node3D = scene.find_child(v.string)
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pos.x = node.position.x
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pos.y = node.position.y
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pos.z = node.position.z
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else:
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pos.x = v.x
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pos.y = v.y
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pos.z = v.z
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var transform = Transform3D()
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transform.origin = pos
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return transform
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####################################################################################################
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# The XR Fragments
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# spec: https://xrfragment.org/doc/RFC_XR_Fragments.html
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####################################################################################################
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func init_href(node:Node):
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null
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func init_src(node:Node):
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null
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