Add GDScript XAC and XSM loaders

8 files changed, 1811 insertions, 0 deletions

diff --git a/game/src/Game/Model/FileAccessUtils.gd b/game/src/Game/Model/FileAccessUtils.gd
new file mode 100644
index 0000000..f5e02e1
--- /dev/null
+++ b/game/src/Game/Model/FileAccessUtils.gd
@@ -0,0 +1,88 @@
+class_name FileAccessUtils
+
+static func read_vec2(file : FileAccess) -> Vector2:
+	return Vector2(file.get_float(), file.get_float())
+
+static func read_vec3(file : FileAccess) -> Vector3:
+	return Vector3(file.get_float(), file.get_float(), file.get_float())
+
+static func read_pos(file : FileAccess) -> Vector3:
+	var pos : Vector3 = read_vec3(file)
+	pos.x = -pos.x
+	return pos
+
+static func read_vec4(file : FileAccess) -> Vector4:
+	return Vector4(file.get_float(), file.get_float(), file.get_float(), file.get_float())
+
+# Because paradox may or may not be consistent with the xsm spec depending on if its Tuesday or not
+static func read_quat(file : FileAccess, int16 : bool = false) -> Quaternion:
+	if int16:
+		return Quaternion(read_f16(file), -read_f16(file), -read_f16(file), read_f16(file))
+	else:
+		return Quaternion(file.get_float(), -file.get_float(), -file.get_float(), file.get_float())
+
+static func read_f16(file : FileAccess) -> float:
+	# 32767 or 0x7FFF is the max magnitude of a signed int16
+	return float(read_int16(file)) / 32767.0
+
+static func replace_chars(string : String) -> String:
+	return string.replace(":", "_").replace("\\", "_").replace("/", "_")
+
+static func read_xac_str(file : FileAccess) -> String:
+	var length : int = file.get_32()
+	var buffer : PackedByteArray = file.get_buffer(length)
+	return buffer.get_string_from_ascii()
+
+static func read_int32(file : FileAccess) -> int:
+	var bytes : int = file.get_32()
+	var negative : bool = bytes >> 31
+	var val : int = bytes & 0x7FFFFFFF
+	if negative:
+		val = -((val ^ 0x7FFFFFFF) + 1)
+	return val
+
+static func read_int16(file : FileAccess) -> int:
+	var bytes : int = file.get_16()
+	var negative : bool = bytes >> 15
+	var val : int = bytes & 0x7FFF
+	if negative:
+		val = -((val ^ 0x7FFF) + 1)
+	return val
+
+static func read_Color32(file : FileAccess) -> Color:
+	return Color8(file.get_8(), file.get_8(), file.get_8(), file.get_8())
+
+static func read_Color128(file : FileAccess) -> Color:
+	return Color(
+		file.get_32() / 0xFFFFFFFF,
+		file.get_32() / 0xFFFFFFFF,
+		file.get_32() / 0xFFFFFFFF,
+		file.get_32() / 0xFFFFFFFF
+	)
+
+static func read_mat4x4(file : FileAccess) -> xac_mat4x4:
+	return xac_mat4x4.new(read_vec4(file), read_vec4(file), read_vec4(file), read_vec4(file))
+
+# This datatype is only ever used to hold a transform for nodes (bones)
+class xac_mat4x4:
+	var col1 : Vector4
+	var col2 : Vector4
+	var col3 : Vector4
+	var col4 : Vector4
+
+	func _init(col1 : Vector4, col2 : Vector4, col3 : Vector4, col4 : Vector4) -> void:
+		self.col1 = col1
+		self.col2 = col2
+		self.col3 = col3
+		self.col4 = col4
+
+	func debugPrint() -> void:
+		print("\t\tMat4x4 col1:", col1, " col2:", col2, " col3:", col3, " col4:", col4)
+
+	func getAsTransform() -> Transform3D: # godot wants 3x4 matrix
+		return Transform3D(
+			Vector3(col1.x, col1.y, col1.z),
+			Vector3(col2.x, col2.y, col2.z),
+			Vector3(col3.x, col3.y, col3.z),
+			Vector3(col4.x, col4.y, col4.z)
+		)
diff --git a/game/src/Game/Model/UnitModel.gd b/game/src/Game/Model/UnitModel.gd
new file mode 100644
index 0000000..0a4fe2f
--- /dev/null
+++ b/game/src/Game/Model/UnitModel.gd
@@ -0,0 +1,160 @@
+class_name UnitModel
+extends Node3D
+
+var skeleton : Skeleton3D = null
+var anim_player : AnimationPlayer = null
+var anim_lib : AnimationLibrary = null
+var sub_units : Array[UnitModel]
+var meshes : Array[MeshInstance3D]
+
+# COLOUR VARIABLES
+@export_group("Colors")
+@export var primary_colour : Color:
+	set(col_in):
+		primary_colour = col_in
+		change_colour_prop(&"colour_primary", primary_colour)
+		for unit : UnitModel in sub_units:
+			unit.primary_colour = col_in
+
+@export var secondary_colour: Color:
+	set(col_in):
+		secondary_colour = col_in
+		change_colour_prop(&"colour_secondary", secondary_colour)
+		for unit : UnitModel in sub_units:
+			unit.secondary_colour = col_in
+
+@export var tertiary_colour : Color:
+	set(col_in):
+		tertiary_colour = col_in
+		change_colour_prop(&"colour_tertiary", tertiary_colour)
+		for unit : UnitModel in sub_units:
+			unit.tertiary_colour = col_in
+
+# ANIMATION VARIABLES
+@export_group("Animation")
+@export var idle_anim : Animation:
+	set(anim_in):
+		load_animation("idle", anim_in)
+		idle_anim = anim_in
+
+@export var move_anim : Animation:
+	set(anim_in):
+		load_animation("move", anim_in)
+		move_anim = anim_in
+
+@export var attack_anim : Animation:
+	set(anim_in):
+		load_animation("attack", anim_in)
+		attack_anim = anim_in
+
+enum Anim { NONE, IDLE, MOVE, ATTACK }
+
+const ANIMATION_LIBRARY : StringName = &"default_lib"
+const ANIMATION_IDLE : String = ANIMATION_LIBRARY + "/idle"
+const ANIMATION_MOVE : String = ANIMATION_LIBRARY + "/move"
+const ANIMATION_ATTACK : String = ANIMATION_LIBRARY + "/attack"
+
+@export var current_anim : Anim:
+	set(anim_in):
+		for unit : UnitModel in sub_units:
+			unit.current_anim = anim_in
+
+		if anim_player:
+			match anim_in:
+				Anim.IDLE:
+					if idle_anim:
+						anim_player.set_current_animation(ANIMATION_IDLE)
+						current_anim = Anim.IDLE
+						return
+				Anim.MOVE:
+					if move_anim:
+						anim_player.set_current_animation(ANIMATION_MOVE)
+						current_anim = Anim.MOVE
+						return
+				Anim.ATTACK:
+					if attack_anim:
+						anim_player.set_current_animation(ANIMATION_ATTACK)
+						current_anim = Anim.ATTACK
+						return
+				_: #None
+					pass
+
+			anim_player.stop()
+
+		current_anim = Anim.NONE
+
+# TEXTURE SCROLL SPEEDS (TANKS TRACKS AND SMOKE)
+@export_subgroup("Texture_Scroll")
+@export var scroll_speed_idle : float = 0.0
+@export var scroll_speed_move : float = 0.0
+@export var scroll_speed_attack : float = 0.0
+
+func unit_init() -> void:
+	for child : Node in get_children():
+		if child is MeshInstance3D:
+			meshes.append(child)
+		elif child is Skeleton3D:
+			skeleton = child
+
+func add_anim_player() -> void:
+	anim_player = AnimationPlayer.new()
+	anim_player.name = "anim_player"
+
+	anim_lib = AnimationLibrary.new()
+	anim_lib.resource_name = ANIMATION_LIBRARY
+	anim_player.add_animation_library(ANIMATION_LIBRARY, anim_lib)
+
+	add_child(anim_player)
+
+func has_bone(bone_name : String) -> bool:
+	return skeleton and skeleton.find_bone(bone_name) > -1
+
+func attach_model(bone_name : String, model : Node3D) -> Error:
+	if not model:
+		push_error("Cannot attach null model to bone \"", bone_name, "\" of UnitModel ", get_name())
+		return FAILED
+
+	if not skeleton:
+		push_error("Cannot attach model \"", model.get_name(), "\" to bone \"", bone_name, "\" of UnitModel ", get_name(), " - has no skeleton!")
+		return FAILED
+
+	var bone_idx : int = skeleton.find_bone(bone_name)
+	if bone_idx < 0 or bone_idx >= skeleton.get_bone_count():
+		push_error("Invalid bone \"", bone_name, "\" (index ", bone_idx, ") for attachment \"", model.get_name(), "\" to UnitModel \"", get_name(), "\"")
+		return FAILED
+
+	var bone_attachment := BoneAttachment3D.new()
+	bone_attachment.name = bone_name
+	bone_attachment.bone_idx = bone_idx
+	bone_attachment.add_child(model)
+	skeleton.add_child(bone_attachment)
+
+	if model is UnitModel:
+		sub_units.push_back(model)
+		model.current_anim = current_anim
+		model.primary_colour = primary_colour
+		model.secondary_colour = secondary_colour
+		model.tertiary_colour = tertiary_colour
+
+	return OK
+
+func _set_tex_scroll(speed : float) -> void:
+	for mesh : MeshInstance3D in meshes:
+		if mesh.get_active_material(0) is ShaderMaterial:
+			mesh.set_instance_shader_parameter(&"scroll", Vector2(0, speed))
+
+func set_flag_index(index : int) -> void:
+	for mesh : MeshInstance3D in meshes:
+		mesh.set_instance_shader_parameter(&"flag_index", index)
+
+func change_colour_prop(prop_name : StringName, prop_val : Color) -> void:
+	for mesh : MeshInstance3D in meshes:
+		if mesh.get_active_material(0) is ShaderMaterial:
+			mesh.set_instance_shader_parameter(prop_name, prop_val)
+
+func load_animation(prop_name : String, animIn : Animation) -> void:
+	if not animIn:
+		return
+	if not anim_player:
+		add_anim_player()
+	anim_lib.add_animation(prop_name,animIn)
diff --git a/game/src/Game/Model/XACLoader.gd b/game/src/Game/Model/XACLoader.gd
new file mode 100644
index 0000000..330384b
--- /dev/null
+++ b/game/src/Game/Model/XACLoader.gd
@@ -0,0 +1,1127 @@
+class_name XACLoader
+
+static var shader : ShaderMaterial = preload("res://src/Game/Model/unit_colours_mat.tres")
+const MAX_UNIT_TEXTURES : int = 32 # max number of textures supported by the shader
+static var added_textures_spec : PackedStringArray
+static var added_textures_diffuse : PackedStringArray
+
+static var flag_shader : ShaderMaterial = preload("res://src/Game/Model/flag_mat.tres")
+
+static func setup_flag_shader() -> void:
+	flag_shader.set_shader_parameter(&"flag_dims", GameSingleton.get_flag_dims())
+	flag_shader.set_shader_parameter(&"texture_flag_sheet_diffuse", GameSingleton.get_flag_sheet_texture())
+
+# Keys: source_file (String)
+# Values: loaded model (UnitModel or Node3D) or LOAD_FAILED_MARKER (StringName)
+static var xac_cache : Dictionary
+
+const LOAD_FAILED_MARKER : StringName = &"XAC LOAD FAILED"
+
+static func get_xac_model(source_file : String, is_unit : bool) -> Node3D:
+	var cached : Variant = xac_cache.get(source_file)
+	if not cached:
+		cached = _load_xac_model(source_file, is_unit)
+		if cached:
+			xac_cache[source_file] = cached
+		else:
+			xac_cache[source_file] = LOAD_FAILED_MARKER
+			push_error("Failed to get XAC model \"", source_file, "\" (current load failed)")
+			return null
+
+	if not cached is Node3D:
+		push_error("Failed to get XAC model \"", source_file, "\" (previous load failed)")
+		return null
+
+	var node : Node3D = cached.duplicate()
+	if node is UnitModel:
+		node.unit_init()
+	return node
+
+static func _load_xac_model(source_file : String, is_unit : bool) -> Node3D:
+	var source_path : String = GameSingleton.lookup_file_path(source_file)
+	var file : FileAccess = FileAccess.open(source_path, FileAccess.READ)
+	if file == null:
+		push_error("Failed to load XAC ", source_file, " from looked up path ", source_path)
+		return null
+
+	var metaDataChunk : MetadataChunk
+	var nodeHierarchyChunk : NodeHierarchyChunk
+	var materialTotalsChunk : MaterialTotalsChunk
+	var materialDefinitionChunks : Array[MaterialDefinitionChunk] = []
+	var mesh_chunks : Array[MeshChunk] = []
+	var skinningChunks : Array[SkinningChunk] = []
+	var chunkType6s : Array[ChunkType6] = []
+	var nodeChunks : Array[NodeChunk] = []
+	var chunkType4s : Array[ChunkTypeUnknown] = []
+	var chunkUnknowns : Array[ChunkTypeUnknown] = []
+
+	readHeader(file)
+
+	while file.get_position() < file.get_length():
+		var type : int = FileAccessUtils.read_int32(file)
+		var length : int = FileAccessUtils.read_int32(file)
+		var version : int = FileAccessUtils.read_int32(file)
+		match type:
+			0x7:
+				metaDataChunk = readMetaDataChunk(file)
+			0xB:
+				nodeHierarchyChunk = readNodeHierarchyChunk(file)
+			0xD:
+				materialTotalsChunk = readMaterialTotalsChunk(file)
+			0x3:
+				# Ver=1 Appears on old version of format
+				var chunk : MaterialDefinitionChunk = readMaterialDefinitionChunk(file, version==1)
+				if chunk.has_specular():
+					is_unit = true
+				materialDefinitionChunks.push_back(chunk)
+			0x1:
+				mesh_chunks.push_back(readMeshChunk(file))
+			0x2:
+				skinningChunks.push_back(readSkinningChunk(file,mesh_chunks, version==2))
+			0x6:
+				chunkType6s.push_back(readChunkType6(file))
+			0x0: # Appears on old version of format
+				nodeChunks.push_back(readNodeChunk(file))
+			0xA: # Appears on old version of format
+				chunkUnknowns.push_back(readChunkTypeUnknown(file, length))
+			0x4: # Appears on old version of format
+				chunkType4s.push_back(readChunkTypeUnknown(file, length))
+			0x8:
+				push_warning("XAC model ", source_file, " contains junk data chunk 0x8 (skipping)")
+				break
+			_:
+				push_error(">> INVALID XAC CHUNK TYPE %s in model %s" % [type, source_file])
+				break
+
+	#BUILD THE GODOT MATERIALS
+	var materials : Array[MaterialDefinition] = make_materials(materialDefinitionChunks)
+
+	#BUILD THE MESH
+	var node : Node3D = null
+
+	if is_unit:
+		node = UnitModel.new()
+	else:
+		node = Node3D.new()
+
+	node.name = metaDataChunk.origFileName.replace("\\", "/").split("/", false)[-1].get_slice(".", 0)
+
+	var skeleton : Skeleton3D = null
+
+	# build the skeleton hierarchy
+	if nodeHierarchyChunk:
+		skeleton = build_armature(nodeHierarchyChunk)
+	elif not nodeChunks.is_empty():
+		skeleton = build_armature_chunk0(nodeChunks)
+
+	if skeleton:
+		node.add_child(skeleton)
+	else:
+		push_warning("MODEL HAS NO SKELETON: ", source_file)
+
+	var st : SurfaceTool = SurfaceTool.new()
+
+	for chunk : MeshChunk in mesh_chunks:
+		var mesh_chunk_name : String
+		if nodeHierarchyChunk:
+			mesh_chunk_name = nodeHierarchyChunk.nodes[chunk.nodeId].name
+		elif not nodeChunks.is_empty():
+			mesh_chunk_name = nodeChunks[chunk.nodeId].name
+
+		const INVALID_MESHES : PackedStringArray = ["polySurface95"]
+		if mesh_chunk_name in INVALID_MESHES:
+			push_warning("Skipping unused mesh \"", mesh_chunk_name, "\" in model \"", node.name, "\"")
+			continue
+
+		var mesh : ArrayMesh = null
+		var verts : PackedVector3Array
+		var normals : PackedVector3Array
+		var tangents : Array[Vector4]
+		var uvs : Array[PackedVector2Array] = []
+		var influenceRangeInd : PackedInt64Array
+
+		# vert attributes could be in any order, so search for them
+		for vertAttrib : VerticesAttribute in chunk.VerticesAttributes:
+			match vertAttrib.type:
+				0: # position
+					verts = vertAttrib.data
+				1: # normals vec3
+					normals = vertAttrib.data
+				2: # tangents vec4
+					tangents = vertAttrib.data
+				3: # uv coords vec2
+					uvs.push_back(vertAttrib.data) #can have multiple sets of uv data
+				5: # influence range, uint32
+					influenceRangeInd = vertAttrib.data
+				_: # type 4 32bit colours and type 6 128bit colours aren't used
+					pass
+
+		if chunk.bIsCollisionMesh or mesh_chunk_name == "pCube1":
+			var ar3d : Area3D = Area3D.new()
+			node.add_child(ar3d)
+			ar3d.owner = node
+			for submesh : SubMesh in chunk.SubMeshes:
+				var shape : ConvexPolygonShape3D = ConvexPolygonShape3D.new()
+				shape.points = verts
+
+				var col : CollisionShape3D = CollisionShape3D.new()
+				col.shape = shape
+
+				ar3d.add_child(col)
+				col.owner = node
+			continue
+
+		#TODO will this produce correct results?
+		var applyVertexWeights : bool = true
+		var skinning_chunk_ind : int = 0
+		for skin : SkinningChunk in skinningChunks:
+			if skin.nodeId == chunk.nodeId:
+				break
+			skinning_chunk_ind += 1
+		if skinning_chunk_ind >= len(skinningChunks):
+			skinning_chunk_ind =  1
+			applyVertexWeights = false
+
+		var meshInstance : MeshInstance3D = MeshInstance3D.new()
+		node.add_child(meshInstance)
+		meshInstance.owner = node
+
+		if mesh_chunk_name:
+			meshInstance.name = mesh_chunk_name
+
+		if skeleton:
+			meshInstance.skeleton = meshInstance.get_path_to(skeleton)
+
+		if not verts.is_empty():
+			var vert_total : int = 0
+			var surfaceIndex : int = 0
+
+			for submesh : SubMesh in chunk.SubMeshes:
+				st.begin(Mesh.PRIMITIVE_TRIANGLES)
+
+				for i : int in submesh.relativeIndices.size():
+					var rel_index : int = vert_total + submesh.relativeIndices[i]
+
+					if not normals.is_empty():
+						st.set_normal(normals[rel_index])
+
+					if not tangents.is_empty():
+						st.set_tangent(Plane(
+							-tangents[rel_index].x,
+							tangents[rel_index].y,
+							tangents[rel_index].z,
+							tangents[rel_index].w
+						))
+
+					if not uvs.is_empty():
+						st.set_uv(uvs[0][rel_index])
+
+					if not influenceRangeInd.is_empty() and not skinningChunks.is_empty() and applyVertexWeights:
+						#TODO: Which skinning Chunk?
+						# likely look at the skinning chunk's nodeId, see if it matches our mesh's id
+						var vert_inf_range_ind : int = influenceRangeInd[rel_index]
+						var skin_chunk : SkinningChunk = skinningChunks[skinning_chunk_ind]
+						var influenceRange : InfluenceRange = skin_chunk.influenceRange[vert_inf_range_ind]
+						var boneWeights : Array[InfluenceData] = skinningChunks[skinning_chunk_ind].influenceData.slice(
+							influenceRange.firstInfluenceIndex,
+							influenceRange.firstInfluenceIndex + influenceRange.numInfluences
+						)
+						if len(boneWeights) > 4:
+							push_error("num BONE WEIGHTS WAS > 4, GODOT DOESNT LIKE THIS")
+							# TODO: Less hacky fix?
+							boneWeights = boneWeights.slice(0,4)
+
+						var godotBoneIds : PackedInt32Array = PackedInt32Array()
+						var godotBoneWeights : PackedFloat32Array = PackedFloat32Array()
+						godotBoneIds.resize(4)
+						godotBoneIds.fill(0)
+						godotBoneWeights.resize(4)
+						godotBoneWeights.fill(0)
+
+						var index : int = 0
+						for bone : InfluenceData in boneWeights:
+							godotBoneIds.set(index, bone.boneId)
+							godotBoneWeights.set(index, bone.fWeight)
+							index += 1
+
+						if skeleton:
+							st.set_bones(godotBoneIds)
+							st.set_weights(godotBoneWeights)
+
+					st.add_vertex(verts[rel_index])
+
+				vert_total += submesh.numVertices
+
+				mesh = st.commit(mesh) # add a new surface to the mesh
+				meshInstance.mesh = mesh
+
+				st.clear()
+
+				mesh.surface_set_material(surfaceIndex, materials[submesh.materialId].mat)
+				surfaceIndex += 1
+
+				if materials[submesh.materialId].spec_index != -1:
+					meshInstance.set_instance_shader_parameter(&"tex_index_specular", materials[submesh.materialId].spec_index)
+
+				if materials[submesh.materialId].diffuse_index != -1:
+					meshInstance.set_instance_shader_parameter(&"tex_index_diffuse", materials[submesh.materialId].diffuse_index)
+
+	return node
+
+# Information needed to set up a material
+# Leave the indices -1 if not using the unit shader
+class MaterialDefinition:
+	var spec_index : int = -1
+	var diffuse_index : int = -1
+	var normal_index : int = -1
+	var mat : Material
+
+	func _init(mat : Material, diffuse_ind : int = -1, spec_ind : int = -1, normal_ind : int = -1) -> void:
+		self.mat = mat
+		self.diffuse_index = diffuse_ind
+		self.spec_index = spec_ind
+		self.normal_index = normal_ind
+
+static func make_materials(materialDefinitionChunks : Array[MaterialDefinitionChunk]) -> Array[MaterialDefinition]:
+	const TEXTURES_PATH : String = "gfx/anims/%s.dds"
+
+	var materials : Array[MaterialDefinition] = []
+
+	for matdef : MaterialDefinitionChunk in materialDefinitionChunks:
+		var diffuse_name : String
+		var specular_name : String
+		var normal_name : String
+
+		# Find important textures
+		for layer : Layer in matdef.Layers:
+			if layer.texture in ["nospec", "unionjacksquare", "test256texture"]:
+				continue
+
+			match layer.mapType:
+				2: # diffuse
+					if not diffuse_name:
+						diffuse_name = layer.texture
+					else:
+						push_error("Multiple diffuse layers in material: ", diffuse_name, " and ", layer.texture)
+
+				3: # specular
+					if not specular_name:
+						specular_name = layer.texture
+					else:
+						push_error("Multiple specular layers in material: ", specular_name, " and ", layer.texture)
+
+				4: # currently unused
+					pass
+
+				5: # normal
+					if not normal_name:
+						normal_name = layer.texture
+					else:
+						push_error("Multiple normal layers in material: ", normal_name, " and ", layer.texture)
+
+				_:
+					push_error("Unknown layer type: ", layer.mapType)
+					pass
+
+		# Unit colour mask
+		if diffuse_name and specular_name:
+			if normal_name:
+				push_error("Normal texture present in unit colours material: ", normal_name)
+
+			var textures_index_spec : int = added_textures_spec.find(specular_name)
+			if textures_index_spec < 0:
+				var unit_colours_mask_texture : ImageTexture = AssetManager.get_texture(TEXTURES_PATH % specular_name)
+				if unit_colours_mask_texture:
+					added_textures_spec.push_back(specular_name)
+
+					# Should we still attempt to add the texture to the shader?
+					if len(added_textures_spec) >= MAX_UNIT_TEXTURES:
+						push_error("Colour masks have exceeded max number of textures supported by unit shader!")
+
+					var colour_masks : Array = shader.get_shader_parameter(&"texture_nation_colors_mask")
+					colour_masks.push_back(unit_colours_mask_texture)
+					textures_index_spec = len(colour_masks) - 1
+					shader.set_shader_parameter(&"texture_nation_colors_mask", colour_masks)
+				else:
+					push_error("Failed to load specular texture: ", specular_name)
+
+			var textures_index_diffuse : int = added_textures_diffuse.find(diffuse_name)
+			if textures_index_diffuse < 0:
+				var diffuse_texture : ImageTexture = AssetManager.get_texture(TEXTURES_PATH % diffuse_name)
+				if diffuse_texture:
+					added_textures_diffuse.push_back(diffuse_name)
+
+					# Should we still attempt to add the texture to the shader?
+					if len(added_textures_diffuse) >= MAX_UNIT_TEXTURES:
+						push_error("Albedos have exceeded max number of textures supported by unit shader!")
+
+					var albedoes : Array = shader.get_shader_parameter(&"texture_albedo")
+					albedoes.push_back(diffuse_texture)
+					textures_index_diffuse = len(albedoes) - 1
+					shader.set_shader_parameter(&"texture_albedo", albedoes)
+				else:
+					push_error("Failed to load diffuse texture: ", diffuse_name)
+
+			materials.push_back(MaterialDefinition.new(shader, textures_index_diffuse, textures_index_spec))
+
+		# Flag (diffuse is unionjacksquare which is ignored)
+		elif normal_name and not diffuse_name:
+			if specular_name:
+				push_error("Specular texture present in flag material: ", specular_name)
+
+			var flag_normal_texture : ImageTexture = AssetManager.get_texture(TEXTURES_PATH % normal_name)
+			if flag_normal_texture:
+				flag_shader.set_shader_parameter(&"texture_normal", flag_normal_texture)
+			else:
+				push_error("Failed to load normal texture: ", normal_name)
+
+			materials.push_back(MaterialDefinition.new(flag_shader))
+
+		# Standard material
+		else:
+			if specular_name:
+				push_error("Specular texture present in standard material: ", specular_name)
+
+			var mat : StandardMaterial3D = StandardMaterial3D.new()
+			mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA_DEPTH_PRE_PASS
+
+			if diffuse_name:
+				var diffuse_texture : ImageTexture = AssetManager.get_texture(TEXTURES_PATH % diffuse_name)
+				if diffuse_texture:
+					mat.set_texture(BaseMaterial3D.TEXTURE_ALBEDO, diffuse_texture)
+				else:
+					push_error("Failed to load diffuse texture: ", diffuse_name)
+
+			if normal_name:
+				var normal_texture : ImageTexture = AssetManager.get_texture(TEXTURES_PATH % normal_name)
+				if normal_texture:
+					mat.normal_enabled = true
+					mat.set_texture(BaseMaterial3D.TEXTURE_NORMAL, normal_texture)
+				else:
+					push_error("Failed to load normal texture: ", normal_name)
+
+			#TODO: Verify that this is correct thing to do to make sure
+			#that places where models are double sided are correct
+			mat.cull_mode = BaseMaterial3D.CULL_DISABLED
+
+			materials.push_back(MaterialDefinition.new(mat))
+
+	return materials
+
+static func build_armature(hierarchy_chunk : NodeHierarchyChunk) -> Skeleton3D:
+	var skeleton : Skeleton3D = Skeleton3D.new()
+	skeleton.name = "skeleton"
+	var cur_id : int = 0
+	for node : NodeData in hierarchy_chunk.nodes:
+		# godot doesn't like the ':' in bone names unlike paradox
+		skeleton.add_bone(FileAccessUtils.replace_chars(node.name))
+		skeleton.set_bone_parent(cur_id, node.parentNodeId)
+
+		#For now assume rest and current position are the same
+		skeleton.set_bone_rest(cur_id, Transform3D(Basis(node.rotation).scaled(node.scale), node.position))
+
+		skeleton.set_bone_pose_position(cur_id, node.position)
+		skeleton.set_bone_pose_rotation(cur_id, node.rotation)
+		skeleton.set_bone_pose_scale(cur_id, node.scale)
+
+		cur_id += 1
+	# conveniently both godot and xac use a parent node id of -1 to represent no parent
+	# TODO: What is the point of xac having both a transform and separate vec3s for rotation, scale, pos, etc.?
+	# for now, will assume the separate components are the truth
+	# it might be that one is a current position and the other is a rest position?
+	return skeleton
+
+static func build_armature_chunk0(nodeChunks : Array[NodeChunk]) -> Skeleton3D:
+	var skeleton : Skeleton3D = Skeleton3D.new()
+	skeleton.name = "skeleton"
+	var cur_id : int = 0
+	for node : NodeChunk in nodeChunks:
+		# godot doesn't like the ':' in bone names unlike paradox
+		skeleton.add_bone(FileAccessUtils.replace_chars(node.name))
+		skeleton.set_bone_parent(cur_id, node.parentBone)
+
+		# For now assume rest and current position are the same
+		skeleton.set_bone_rest(cur_id, Transform3D(Basis(node.rotation).scaled(node.scale), node.position))
+
+		skeleton.set_bone_pose_position(cur_id, node.position)
+		skeleton.set_bone_pose_rotation(cur_id, node.rotation)
+		skeleton.set_bone_pose_scale(cur_id, node.scale)
+
+		cur_id += 1
+	return skeleton
+
+static func readHeader(file : FileAccess) -> void:
+	var magic_bytes : PackedByteArray = [file.get_8(), file.get_8(), file.get_8(), file.get_8()]
+	var magic : String = magic_bytes.get_string_from_ascii()
+	var version : String = "%d.%d" % [file.get_8(), file.get_8()]
+	var bBigEndian : bool = file.get_8()
+	var multiplyOrder : int = file.get_8()
+	#print(magic, ", version: ", version, ", bigEndian: ", bBigEndian, " multiplyOrder: ", multiplyOrder)
+
+static func readMetaDataChunk(file : FileAccess) -> MetadataChunk:
+	return MetadataChunk.new(
+		file.get_32(), FileAccessUtils.read_int32(file), file.get_8(), file.get_8(),
+		Vector2i(file.get_8(), file.get_8()), file.get_float(),
+		FileAccessUtils.read_xac_str(file), FileAccessUtils.read_xac_str(file),
+		FileAccessUtils.read_xac_str(file), FileAccessUtils.read_xac_str(file)
+	)
+
+class MetadataChunk:
+	var repositionMask : int # uint32
+	var repositioningNode : int # int32
+	var exporterMajorVersion : int # byte
+	var exporterMinorVersion : int # byte
+	var unused : Vector2i # 2x byte
+	var retargetRootOffset : float
+	var sourceApp : String
+	var origFileName : String
+	var exportDate : String
+	var actorName : String
+
+	func _init(
+		repMask : int,
+		repNode : int,
+		exMajV : int,
+		exMinV : int,
+		un : Vector2i,
+		retRootOff : float,
+		sourceApp : String,
+		origFile : String,
+		date : String,
+		actorName : String
+	) -> void:
+		self.repositionMask = repMask
+		self.repositioningNode = repNode
+		self.exporterMajorVersion = exMajV
+		self.exporterMinorVersion = exMinV
+		self.unused = un
+		self.retargetRootOffset = retRootOff
+		self.sourceApp = sourceApp
+		self.origFileName = origFile
+		self.exportDate = date
+		self.actorName = actorName
+
+	func debugPrint() -> void:
+		print("Ver: %d.%d, exported: %s, fileName: %s, sourceApp: %s" %
+			[exporterMajorVersion, exporterMinorVersion, exportDate, origFileName, sourceApp])
+		print("Actor: %s, retargetRootOffset: %d, repositionMask: %d, repositionNode: %d" %
+			[actorName, retargetRootOffset, repositionMask, repositioningNode])
+
+# HIERARCHY
+
+static func readNodeData(file : FileAccess) -> NodeData:
+	return NodeData.new(
+		FileAccessUtils.read_quat(file), FileAccessUtils.read_quat(file),
+		FileAccessUtils.read_pos(file), FileAccessUtils.read_vec3(file),
+		FileAccessUtils.read_vec3(file), # 3x unused floats
+		FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file),
+		FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file),
+		FileAccessUtils.read_mat4x4(file), file.get_float(), FileAccessUtils.read_xac_str(file)
+	)
+
+class NodeData:
+	var rotation : Quaternion
+	var scaleRotation : Quaternion
+	var position : Vector3
+	var scale : Vector3
+	var unused : Vector3 # 3x unused floats
+	var unknown : int # int32
+	var unknown2 : int # int32
+	var parentNodeId : int # int32
+	var numChildNodes : int # int32
+	var bIncludeInBoundsCalc : bool # int32
+	var transform : FileAccessUtils.xac_mat4x4
+	var fImportanceFactor : float
+	var name : String
+
+	func _init(
+		rot : Quaternion,
+		scaleRot : Quaternion,
+		pos : Vector3,
+		scale : Vector3,
+		unused : Vector3,
+		unknown : int,
+		unknown2 : int,
+		parentNodeId : int,
+		numChildNodes : int,
+		incInBoundsCalc : bool,
+		transform : FileAccessUtils.xac_mat4x4,
+		fImportanceFactor : float,
+		name : String
+	) -> void:
+		self.rotation = rot
+		self.scaleRotation = scaleRot
+		self.position = pos
+		self.scale = scale
+		self.unused = unused
+		self.unknown = unknown2
+		self.unknown2 = unknown2
+		self.parentNodeId = parentNodeId
+		self.numChildNodes = numChildNodes
+		self.bIncludeInBoundsCalc = incInBoundsCalc
+		self.transform = transform
+		self.fImportanceFactor = fImportanceFactor
+		self.name = name
+
+	func debugPrint() -> void:
+		print("\tparentNodeId: %d,\t numChildNodes: %d,\t Node Name: %s" % [parentNodeId, numChildNodes, name])
+		print("\tunused %s,%s,%s, -1: %s, -1: %s" % [unused[0], unused[1], unused[2], unknown, unknown2])
+
+static func readNodeHierarchyChunk(file : FileAccess) -> NodeHierarchyChunk:
+	var numNodes : int = FileAccessUtils.read_int32(file)
+	var numRootNodes : int = FileAccessUtils.read_int32(file)
+	var nodes : Array[NodeData] = []
+	for i : int in numNodes:
+		nodes.push_back(readNodeData(file))
+	return NodeHierarchyChunk.new(numNodes, numRootNodes, nodes)
+
+class NodeHierarchyChunk:
+	var numNodes : int # int32
+	var numRootNodes : int # int32
+	var nodes : Array[NodeData]
+
+	func _init(numNodes : int, numRootNodes : int, nodes : Array[NodeData]) -> void:
+		self.numNodes = numNodes
+		self.numRootNodes = numRootNodes
+		self.nodes = nodes
+
+	func debugPrint() -> void:
+		print("numNodes: %d, numRootNodes: %d" % [numNodes, numRootNodes])
+		for node : NodeData in nodes:
+			node.debugPrint()
+
+# MATERIAL TOTALS
+
+static func readMaterialTotalsChunk(file : FileAccess) -> MaterialTotalsChunk:
+	return MaterialTotalsChunk.new(FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file))
+
+class MaterialTotalsChunk:
+	var numTotalMaterials : int # int32
+	var numStandMaterials : int # int32
+	var numFxMaterials : int # int32
+
+	func _init(numTotalMaterials : int, numStandMaterials : int, numFxMaterials : int) -> void:
+		self.numTotalMaterials = numTotalMaterials
+		self.numStandMaterials = numStandMaterials
+		self.numFxMaterials = numFxMaterials
+
+	func debugPrint() -> void:
+		print("totalMaterials: %d, standardMaterials: %d, fxMaterials: %d" %
+			[numTotalMaterials, numStandMaterials, numFxMaterials])
+
+# MATERIAL DEFINITION
+
+static func readLayer(file : FileAccess, isV1 : bool) -> Layer:
+	var unknown : Vector3i
+	if isV1:
+		unknown = Vector3i(
+			FileAccessUtils.read_int32(file),
+			FileAccessUtils.read_int32(file),
+			FileAccessUtils.read_int32(file)
+		)
+	var layer : Layer = Layer.new(
+		file.get_float(), file.get_float(), file.get_float(), file.get_float(),
+		file.get_float(), file.get_float(), FileAccessUtils.read_int16(file),
+		file.get_8(), file.get_8(), FileAccessUtils.read_xac_str(file), unknown
+	)
+	return layer
+
+class Layer:
+	var amount : float
+	var uOffset : float
+	var vOffset : float
+	var uTiling : float
+	var vTiling : float
+	var rotInRad : float
+	var matId : int # int16
+	var mapType : int # byte
+	var unused : int # byte
+	var texture : String
+	var unknown : Vector3i # Unknown 3 integers present in v1 of the chunk
+
+	func _init(
+		amount : float,
+		uOffset : float,
+		vOffset : float,
+		uTiling : float,
+		vTiling : float,
+		rotInRad : float,
+		matId : int,
+		mapType : int,
+		unused : int,
+		texture : String,
+		unknown : Vector3i
+	) -> void:
+		self.amount = amount
+		self.uOffset = uOffset
+		self.vOffset = vOffset
+		self.uTiling = uTiling
+		self.vTiling = vTiling
+		self.rotInRad = rotInRad
+		self.matId = matId
+		self.mapType = mapType
+		self.unused = unused
+		self.texture = texture
+		self.unknown = unknown
+
+	func debugPrint() -> void:
+		print("\tLayer MatId:%d,\t UVOffset:%d,%d,\t UVTiling %d,%d mapType: %d,\t Texture Name: %s" %
+			[matId, uOffset, vOffset, uTiling, vTiling, mapType, texture])
+		print("\t  amount:%s,\t rot:%s,\t unused:%d" % [amount, rotInRad, unused])
+
+	func is_specular() -> bool:
+		return mapType == 3
+
+# TODO: Might want to change this from vec4d to colours where appropriate
+static func readMaterialDefinitionChunk(file : FileAccess, isV1 : bool) -> MaterialDefinitionChunk:
+	var chunk : MaterialDefinitionChunk = MaterialDefinitionChunk.new(
+		FileAccessUtils.read_vec4(file), FileAccessUtils.read_vec4(file),
+		FileAccessUtils.read_vec4(file), FileAccessUtils.read_vec4(file),
+		file.get_float(), file.get_float(), file.get_float(), file.get_float(),
+		file.get_8(), file.get_8(), file.get_8(), file.get_8(),
+		FileAccessUtils.read_xac_str(file)
+	)
+	var layers : Array[Layer] = []
+	for i : int in chunk.numLayers:
+		layers.push_back(readLayer(file, isV1))
+	chunk.setLayers(layers)
+	return chunk
+
+class MaterialDefinitionChunk:
+	var ambientColor : Vector4
+	var diffuseColor : Vector4
+	var specularColor : Vector4
+	var emissiveColor : Vector4
+	var shine : float
+	var shineStrength : float
+	var opacity : float
+	var ior : float
+	var bDoubleSided : bool # byte
+	var bWireframe : bool # byte
+	var unused : int # 1 byte
+	var numLayers : int # byte
+	var name : String
+	var Layers : Array[Layer]
+
+	func _init(
+		ambientColor : Vector4,
+		diffuseColor : Vector4,
+		specularColor : Vector4,
+		emissiveColor : Vector4,
+		shine : float,
+		shineStrength : float,
+		opacity : float,
+		ior : float,
+		bDoubleSided : bool,
+		bWireframe : bool,
+		unused : int,
+		numLayers : int,
+		name : String
+	) -> void:
+		self.ambientColor = ambientColor
+		self.diffuseColor = diffuseColor
+		self.specularColor = specularColor
+		self.emissiveColor = emissiveColor
+		self.shine = shine
+		self.shineStrength = shineStrength
+		self.opacity = opacity
+		self.ior = ior
+		self.bDoubleSided = bDoubleSided
+		self.bWireframe = bWireframe
+		self.unused = unused
+		self.numLayers = numLayers
+		self.name = name
+
+	func setLayers(layers : Array[Layer]) -> void:
+		self.Layers = layers
+
+	# Specular textures are used for country-specific unit colours,
+	# which need a UnitModel to be set through
+	func has_specular() -> bool:
+		for layer : Layer in Layers:
+			if layer.is_specular():
+				return true
+		return false
+
+	func debugPrint() -> void:
+		print("Material Name: %s, num layers: %d, doubleSided %s" % [name, numLayers, bDoubleSided])
+		print("\tshine:%s\tshineStrength:%s\t,opacity:%s,\tior:%s,\tunused:%s" % [shine, shineStrength, opacity, ior, unused])
+		for layer : Layer in Layers:
+			layer.debugPrint()
+
+# MESH
+
+static func readVerticesAttribute(file : FileAccess, numVerts : int) -> VerticesAttribute:
+	var vertAttrib : VerticesAttribute = VerticesAttribute.new(
+		FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file),
+		file.get_8(), file.get_8(), Vector2i(file.get_8(), file.get_8()))
+	var data : Variant
+	match vertAttrib.type:
+		0: # position
+			data = PackedVector3Array()
+			for i : int in numVerts:
+				data.push_back(FileAccessUtils.read_pos(file))
+		1: # normals
+			data = PackedVector3Array()
+			for i : int in numVerts:
+				data.push_back(FileAccessUtils.read_pos(file))
+		2: # tangents
+			data = [] as Array[Vector4]
+			for i : int in numVerts:
+				var tangent : Vector4 = FileAccessUtils.read_vec4(file)
+				#tangent.w *= -1
+				data.push_back(tangent)
+		3: # uvs
+			data = PackedVector2Array()
+			for i : int in numVerts:
+				data.push_back(FileAccessUtils.read_vec2(file))
+		4: # 32bit colors
+			data = PackedColorArray()
+			for i : int in numVerts:
+				data.push_back(FileAccessUtils.read_Color32(file))
+		5: # influence range indices
+			data = PackedInt64Array()
+			for i : int in numVerts:
+				data.push_back(file.get_32())
+		6: # 128bit colors
+			data = PackedColorArray()
+			for i : int in numVerts:
+				data.push_back(FileAccessUtils.read_Color128(file))
+		_:
+			push_error("INVALID XAC VERTATTRIBUTE TYPE %d" % vertAttrib.type)
+	vertAttrib.setData(data)
+	return vertAttrib
+
+# mesh has one of these for each vertex property (position, normals, etc)
+class VerticesAttribute:
+	var type : int # int32
+	var attribSize : int # int32
+	var bKeepOriginals : bool # byte
+	var bIsScaleFactor : bool # byte
+	var pad : Vector2i # 2x byte
+	var data : Variant # numVerts * attribSize
+
+	func _init(
+		type : int,
+		attribSize : int,
+		bKeepOriginals : bool,
+		bIsScaleFactor : bool,
+		pad : Vector2i
+	) -> void:
+		self.type = type
+		self.attribSize = attribSize
+		self.bKeepOriginals = bKeepOriginals
+		self.bIsScaleFactor = bIsScaleFactor
+		self.pad = pad
+
+	func setData(data : Variant) -> void:
+		self.data = data
+
+	func debugPrint() -> void:
+		var typeStr : String
+		match type:
+			0:
+				typeStr = "Positions"
+			1:
+				typeStr = "Normals"
+			2:
+				typeStr = "Tangents"
+			3:
+				typeStr = "UV Coords"
+			4:
+				typeStr = "32bit Colors"
+			5:
+				typeStr = "Influence Range Indices (u32)"
+			6:
+				typeStr = "128bit Colors"
+			_:
+				typeStr = "invalid type %d" % type
+		print("\tattribSize:%d (bytes),\t keepOriginals:%s,\t isScaleFactor:%s,\t VertAttrib: type:%s" %
+			[attribSize, bKeepOriginals, bIsScaleFactor, typeStr])
+		print("\tpad: %s" % pad)
+
+static func readSubMesh(file : FileAccess) -> SubMesh:
+	var subMesh : SubMesh = SubMesh.new(
+		FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file),
+		FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file)
+	)
+	var relIndices : PackedInt32Array = PackedInt32Array()
+	var boneIds : PackedInt32Array = PackedInt32Array()
+	for i : int in subMesh.numIndices:
+		relIndices.push_back(FileAccessUtils.read_int32(file))
+	for i : int in subMesh.numBones:
+		boneIds.push_back(FileAccessUtils.read_int32(file))
+	subMesh.setBoneIds(boneIds)
+	subMesh.setRelIndices(relIndices)
+	return subMesh
+
+class SubMesh:
+	var numIndices : int # int32
+	var numVertices : int # int32
+	var materialId : int # int32
+	var numBones : int # int32
+	var relativeIndices : PackedInt32Array # int32 [numIndices]
+	var boneIds : PackedInt32Array # int32 [numBones], unused
+
+	func _init(numIndices : int, numVertices : int, materialId : int, numBones : int) -> void:
+		self.numIndices = numIndices
+		self.numVertices = numVertices
+		self.materialId = materialId
+		self.numBones = numBones
+
+	func setRelIndices(relativeIndices : PackedInt32Array) -> void:
+		self.relativeIndices = relativeIndices
+
+	func setBoneIds(boneIds : PackedInt32Array) -> void:
+		self.boneIds = boneIds
+
+	func debugPrint() -> void:
+		print("\tSubMesh:\t numIndices:%d,\t numVerts:%d,\t matId:%d,\t numBones:%d" %
+			[numIndices, numVertices, materialId, numBones])
+
+static func readMeshChunk(file : FileAccess) -> MeshChunk:
+	var mesh : MeshChunk = MeshChunk.new(
+		FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file),
+		FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file),
+		FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file), file.get_8(),
+		Vector3i(file.get_8(), file.get_8(), file.get_8())
+	)
+	var vertAttribs : Array[VerticesAttribute] = []
+	var submeshes : Array[SubMesh] = []
+	for i : int in mesh.numAttribLayers:
+		vertAttribs.push_back(readVerticesAttribute(file,mesh.numVertices))
+	for i : int in mesh.numSubMeshes:
+		submeshes.push_back(readSubMesh(file))
+	mesh.setVerticesAttributes(vertAttribs)
+	mesh.setSubMeshes(submeshes)
+	return mesh
+
+class MeshChunk:
+	var nodeId : int # int32
+	var numInfluenceRanges : int # int32
+	var numVertices : int # int32
+	var numIndices : int # int32
+	var numSubMeshes : int # int32
+	var numAttribLayers : int # int32
+	var bIsCollisionMesh : bool # byte
+	var pad : Vector3i # 3x byte
+	var VerticesAttributes : Array[VerticesAttribute]
+	var SubMeshes : Array[SubMesh]
+
+	func _init(
+		nodeId : int,
+		numInfluenceRanges : int,
+		numVertices : int,
+		numIndices : int,
+		numSubMeshes : int,
+		numAttribLayers : int,
+		bIsCollisionMesh : bool,
+		pad : Vector3i
+	) -> void:
+		self.nodeId = nodeId
+		self.numInfluenceRanges = numInfluenceRanges
+		self.numVertices = numVertices
+		self.numIndices = numIndices
+		self.numSubMeshes = numSubMeshes
+		self.numAttribLayers = numAttribLayers
+		self.bIsCollisionMesh = bIsCollisionMesh
+		self.pad = pad
+
+	func setVerticesAttributes(VerticesAttributes : Array[VerticesAttribute]) -> void:
+		self.VerticesAttributes = VerticesAttributes
+
+	func setSubMeshes(SubMeshes : Array[SubMesh]) -> void:
+		self.SubMeshes = SubMeshes
+
+	func debugPrint() -> void:
+		print("Mesh: nodeId:%d, numVerts:%d, numSubMeshes:%d, numVertAttribs:%d, isCollisionMesh:%s" %
+			[nodeId, numVertices, numSubMeshes, numAttribLayers, bIsCollisionMesh])
+		for vertAttrib in VerticesAttributes:
+			vertAttrib.debugPrint()
+		for subMesh : SubMesh in SubMeshes:
+			subMesh.debugPrint()
+
+# SKINNING
+static func readInfluenceData(file : FileAccess) -> InfluenceData:
+	return InfluenceData.new(file.get_float(), FileAccessUtils.read_int16(file), Vector2i(file.get_8(), file.get_8()))
+
+class InfluenceData:
+	var fWeight : float # (0..1)
+	var boneId : int # int16
+	var pad : Vector2i # 2x byte
+
+	func _init(fWeight : float, boneId : int, pad : Vector2i) -> void:
+		self.fWeight = fWeight
+		self.boneId = boneId
+		self.pad = pad
+
+	func debugPrint() -> void:
+		print("\tInfluenceData:\t boneId: %d,\t Weight: %s" % [boneId, fWeight])
+
+# For some reason influenceRange isn't being loaded, needs investigation
+# Weird data on the flag
+
+static func readInfluenceRange(file : FileAccess) -> InfluenceRange:
+	return InfluenceRange.new(FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file))
+
+class InfluenceRange:
+	var firstInfluenceIndex : int # int32
+	var numInfluences : int # int32
+
+	func _init(firstInfluenceIndex : int, numInfluences : int) -> void:
+		self.firstInfluenceIndex = firstInfluenceIndex
+		self.numInfluences = numInfluences
+
+	func debugPrint() -> void:
+		print("\tInfluenceRange:\t firstIndex: %d,\t numInfluences: %d" % [firstInfluenceIndex, numInfluences])
+
+static func readSkinningChunk(file : FileAccess, meshChunks : Array[MeshChunk], isV2 : bool) -> SkinningChunk:
+	var skinning : SkinningChunk = null
+	skinning = SkinningChunk.new(
+		FileAccessUtils.read_int32(file), -1 if isV2 else FileAccessUtils.read_int32(file),
+		FileAccessUtils.read_int32(file), file.get_8(), Vector3i(file.get_8(), file.get_8(), file.get_8())
+	)
+	var influenceData : Array[InfluenceData] = []
+	var influenceRange : Array[InfluenceRange] = []
+	for i : int in skinning.numInfluences:
+		influenceData.push_back(readInfluenceData(file))
+	# search the list of mesh chunks for the one which matches IsCollisionMesh and NodeId?
+	# documentation is a little unclear about this (lists the mesh accessing by node, which isn't possible)
+	for chunk : MeshChunk in meshChunks:
+		if chunk.nodeId == skinning.nodeId and chunk.bIsCollisionMesh == skinning.bIsForCollisionMesh:
+			for i : int in chunk.numInfluenceRanges:
+				influenceRange.push_back(readInfluenceRange(file))
+			break
+	skinning.setInfluenceData(influenceData)
+	skinning.setInfluenceRange(influenceRange)
+	return skinning
+
+class SkinningChunk:
+	var nodeId : int # int32
+	var numLocalBones : int # int32, of bones in the influence data
+	var numInfluences : int # int32
+	var bIsForCollisionMesh : bool # byte boolean
+	var pad : Vector3i # 3x pad
+	var influenceData : Array[InfluenceData]
+	var influenceRange : Array[InfluenceRange]
+
+	func _init(
+		nodeId : int,
+		numLocalBones : int,
+		numInfluences : int,
+		bIsForCollisionMesh : bool,
+		pad : Vector3i
+	) -> void:
+		self.nodeId = nodeId
+		self.numLocalBones = numLocalBones
+		self.numInfluences = numInfluences
+		self.bIsForCollisionMesh = bIsForCollisionMesh
+		self.pad = pad
+
+	func setInfluenceData(influenceData : Array[InfluenceData]) -> void:
+		self.influenceData = influenceData
+
+	func setInfluenceRange(influenceRange : Array[InfluenceRange]) -> void:
+		self.influenceRange = influenceRange
+
+	func debugPrint() -> void:
+		print("Skinning: nodeId:%d, numInfluencedBones: %d, numInfluences: %d, CollisionMesh?: %d" %
+			[nodeId, numLocalBones, numInfluences, bIsForCollisionMesh])
+		for infDat : InfluenceData in influenceData:
+			infDat.debugPrint()
+		for infRange : InfluenceRange in influenceRange:
+			infRange.debugPrint()
+
+# TODO: What is chunk type6, figure out what the plausible datatypes are
+# Currently, since XACs tend to use int32s and float (32bit) + strings, and no strings
+# are evident in chunk type 6, to load these as arrays of int32
+
+static func readChunkType6(file : FileAccess) -> ChunkType6:
+	var intArr : PackedInt32Array = []
+	var floatArr : PackedFloat32Array = []
+	for i : int in 12:
+		intArr.push_back(FileAccessUtils.read_int32(file))
+	for i : int in 9:
+		floatArr.push_back(file.get_float())
+	return ChunkType6.new(intArr, floatArr, FileAccessUtils.read_int32(file))
+
+class ChunkType6:
+	var unknown : PackedInt32Array
+	var unknown_floats : PackedFloat32Array
+	var maybe_node_id : int
+
+	func _init(unknown : PackedInt32Array, unknown_floats : PackedFloat32Array, maybe_node_id : int) -> void:
+		self.unknown = unknown
+		self.unknown_floats = unknown_floats
+		self.maybe_node_id = maybe_node_id
+
+	func debugPrint() -> void:
+		print("\tUnknown: %s\n\tFloats: %s\n\tPerhaps NodeId? %s" % [self.unknown, self.unknown_floats, self.maybe_node_id])
+
+# Chunk type 0x0
+static func readNodeChunk(file : FileAccess) -> NodeChunk:
+	return NodeChunk.new(
+		FileAccessUtils.read_quat(file), FileAccessUtils.read_quat(file),
+		FileAccessUtils.read_pos(file), FileAccessUtils.read_vec3(file),
+		FileAccessUtils.read_vec3(file), # unused 3 floats
+		FileAccessUtils.read_int32(file), FileAccessUtils.read_int32(file), #-1-1
+		# 17 x 32bit unknowns, likely matrix and some other info
+		# last 32bit unknown is likely fImportanceFactor, (float 1f). Rest is likely matrix
+		(func() -> PackedInt32Array:
+			var array : PackedInt32Array = PackedInt32Array()
+			for i : int in 17:
+				array.push_back(FileAccessUtils.read_int32(file))
+			return array).call(),
+		FileAccessUtils.read_xac_str(file)
+	)
+
+class NodeChunk:
+	var rotation : Quaternion
+	var scaleRotation : Quaternion
+	var position : Vector3
+	var scale : Vector3
+	var unused : Vector3 # 3x unused floats
+	var unknown : int # int32
+	var parentBone : int # int32
+	var unknown2 : PackedInt32Array # 17x int32 sized numbers
+	var name : String
+
+	func _init(
+		rot : Quaternion,
+		scaleRot : Quaternion,
+		pos : Vector3,
+		scale : Vector3,
+		unused : Vector3,
+		unknown : int,
+		parentBone : int,
+		unknown2 : PackedInt32Array,
+		name : String
+	) -> void:
+		self.rotation = rot
+		self.scaleRotation = scaleRot
+		self.position = pos
+		self.scale = scale
+		self.unused = unused
+		self.unknown = unknown
+		self.parentBone = parentBone
+		self.unknown2 = unknown2
+		self.name = name
+
+	func debugPrint() -> void:
+		print("\tNode Name: %s, parentBone %s" % [name, parentBone])
+		print("\tunused (%s) unknown: %s" % [unused, unknown])
+		print("\tunknown after -1-1: %s" % unknown2)
+
+static func readChunkTypeUnknown(file : FileAccess, length : int) -> ChunkTypeUnknown:
+	return ChunkTypeUnknown.new(file.get_buffer(length))
+
+class ChunkTypeUnknown:
+	var unknown : PackedByteArray
+
+	func _init(unknown : PackedByteArray) -> void:
+		self.unknown = unknown
+
+	func debugPrint() -> void:
+		print("\tUnknown: %s" % self.unknown)
+
+# TODO: MorphTarget, Deformation, Transformation, MorphTargetsChunk
diff --git a/game/src/Game/Model/XSMLoader.gd b/game/src/Game/Model/XSMLoader.gd
new file mode 100644
index 0000000..332bbec
--- /dev/null
+++ b/game/src/Game/Model/XSMLoader.gd
@@ -0,0 +1,363 @@
+class_name XSMLoader
+
+# Keys: source_file (String)
+# Values: loaded animation (Animation) or LOAD_FAILED_MARKER (StringName)
+static var xsm_cache : Dictionary
+
+const LOAD_FAILED_MARKER : StringName = &"XSM LOAD FAILED"
+
+static func get_xsm_animation(source_file : String) -> Animation:
+	var cached : Variant = xsm_cache.get(source_file)
+	if not cached:
+		cached = _load_xsm_animation(source_file)
+		if cached:
+			xsm_cache[source_file] = cached
+		else:
+			xsm_cache[source_file] = LOAD_FAILED_MARKER
+			push_error("Failed to get XSM model \"", source_file, "\" (current load failed)")
+			return null
+
+	if not cached is Animation:
+		push_error("Failed to get XSM model \"", source_file, "\" (previous load failed)")
+		return null
+
+	return cached
+
+const SKELETON_PATH : String = "./skeleton:%s"
+
+static func _load_xsm_animation(source_file : String) -> Animation:
+	var source_path : String = GameSingleton.lookup_file_path(source_file)
+	var file : FileAccess = FileAccess.open(source_path, FileAccess.READ)
+	if file == null:
+		push_error("Failed to load XSM ", source_file, " from looked up path ", source_path)
+		return null
+
+	readHeader(file)
+
+	var metadataChunk : MetadataChunk = null
+	var boneAnimationChunks : Array[BoneAnimationChunk] = []
+
+	while file.get_position() < file.get_length():
+		var type : int = FileAccessUtils.read_int32(file)
+		var length : int = FileAccessUtils.read_int32(file)
+		var version : int = FileAccessUtils.read_int32(file)
+
+		match type:
+			0xC9: #Metadata
+				metadataChunk = readMetadataChunk(file)
+			0xCA: #Bone Animation
+				boneAnimationChunks.push_back(readBoneAnimationChunk(file, metadataChunk.use_quat_16()))
+			_:
+				push_error(">> INVALID XSM CHUNK TYPE %X" % type)
+				break
+
+	var animLength : float = 0.0
+	var anim : Animation = Animation.new()
+	for anim_Chunk : BoneAnimationChunk in boneAnimationChunks:
+		for submotion : SkeletalSubMotion in anim_Chunk.SkeletalSubMotions:
+			# NOTE: godot uses ':' to specify properties, so we replace such characters with '_'
+			var skeleton_path : String = SKELETON_PATH % FileAccessUtils.replace_chars(submotion.nodeName)
+
+			if submotion.numPosKeys > 0:
+				var id : int = anim.add_track(Animation.TYPE_POSITION_3D)
+				anim.track_set_path(id, skeleton_path)
+				for key : PosKey in submotion.PosKeys:
+					anim.position_track_insert_key(id, key.fTime, key.pos)
+					if key.fTime > animLength:
+						animLength = key.fTime
+			else: # EXPERIMENTAL: see if setting posePos fixes idle3
+				var id : int = anim.add_track(Animation.TYPE_POSITION_3D)
+				anim.track_set_path(id, skeleton_path)
+				anim.position_track_insert_key(id, 0, submotion.posePos)
+
+			if submotion.numRotKeys > 0:
+				var id : int = anim.add_track(Animation.TYPE_ROTATION_3D)
+				anim.track_set_path(id, skeleton_path)
+				for key : RotKey in submotion.RotKeys:
+					anim.rotation_track_insert_key(id, key.fTime, key.rot)
+					if key.fTime > animLength:
+						animLength = key.fTime
+			else: # EXPERIMENTAL: see if setting posePos fixes idle3
+				var id : int = anim.add_track(Animation.TYPE_ROTATION_3D)
+				anim.track_set_path(id, skeleton_path)
+				anim.rotation_track_insert_key(id, 0, submotion.poseRot)
+
+			if submotion.numScaleKeys > 0:
+				var id : int = anim.add_track(Animation.TYPE_SCALE_3D)
+				anim.track_set_path(id, skeleton_path)
+				for key : ScaleKey in submotion.ScaleKeys:
+					anim.scale_track_insert_key(id, key.fTime, key.scale)
+					if key.fTime > animLength:
+						animLength = key.fTime
+
+			# TODO: submotion.numScaleRotKeys
+
+	anim.length = animLength
+	anim.loop_mode = Animation.LOOP_LINEAR
+
+	xsm_cache[source_file] = anim
+	return anim
+
+static func readHeader(file : FileAccess) -> void:
+	var magic_bytes : PackedByteArray = [file.get_8(), file.get_8(), file.get_8(), file.get_8()]
+	var magic : String = magic_bytes.get_string_from_ascii()
+	var version : String = "%d.%d" % [file.get_8(), file.get_8()]
+	var bBigEndian : bool = file.get_8()
+	var pad : int = file.get_8()
+	#print(magic, ", version: ", version, ", bigEndian: ", bBigEndian, " pad: ", pad)
+
+# NOTE: the "pad" variable is actually very important!
+# It seems to have something to do with whether paradox uses int16 or int32
+# for quaternions (it's "pad" or version number, can't tell)
+
+static func readMetadataChunk(file : FileAccess) -> MetadataChunk:
+	return MetadataChunk.new(
+		file.get_float(), file.get_float(), FileAccessUtils.read_int32(file),
+		file.get_8(), file.get_8(), file.get_16(),
+		FileAccessUtils.read_xac_str(file), FileAccessUtils.read_xac_str(file), FileAccessUtils.read_xac_str(file), FileAccessUtils.read_xac_str(file)
+	)
+
+class MetadataChunk:
+	var unused : float
+	var fMaxAcceptableError : float
+	var fps : int # int32
+	var exporterMajorVersion : int  # byte
+	var exporterMinorVersion : int  # byte
+	var pad : int # 2x byte
+	var sourceApp : String
+	var origFileName : String
+	var exportDate : String
+	var motionName : String
+
+	func _init(
+		unused : float,
+		fMaxAcceptableError : float,
+		fps : int,
+		exporterMajorVersion : int,
+		exporterMinorVersion : int,
+		pad : int,
+		sourceApp : String,
+		origFileName : String,
+		exportDate : String,
+		motionName : String
+	) -> void:
+		self.unused = unused
+		self.fMaxAcceptableError = fMaxAcceptableError
+		self.fps = fps
+		self.exporterMajorVersion = exporterMajorVersion
+		self.exporterMinorVersion = exporterMinorVersion
+		self.pad = pad
+		self.sourceApp = sourceApp
+		self.origFileName = origFileName
+		self.exportDate = exportDate
+		self.motionName = motionName
+
+	func debugPrint() -> void:
+		print("FileName: %s, sourceApp: %s, exportDate: %s, ExporterV:%d.%d" %
+			[origFileName, sourceApp, exportDate, exporterMajorVersion, exporterMinorVersion])
+		print("MotionName: %s, fps: %d, MaxError: %s, Use 16-bit int Quaternions?:%s" %
+			[motionName, fps, fMaxAcceptableError, use_quat_16()])
+
+	func use_quat_16() -> bool:
+		return pad == 0x0
+
+static func readPosKey(file : FileAccess) -> PosKey:
+	return PosKey.new(FileAccessUtils.read_pos(file), file.get_float())
+
+class PosKey:
+	var pos : Vector3
+	var fTime : float
+
+	func _init(pos : Vector3, fTime : float) -> void:
+		self.pos = pos
+		self.fTime = fTime
+
+	func debugPrint() -> void:
+		print("\t\tPos:%s, time:%s" % [pos, fTime])
+
+static func readRotKey(file : FileAccess, use_quat16 : bool) -> RotKey:
+	return RotKey.new(FileAccessUtils.read_quat(file, use_quat16), file.get_float())
+
+class RotKey:
+	var rot : Quaternion
+	var fTime : float
+
+	func _init(rot : Quaternion, fTime : float) -> void:
+		self.rot = rot
+		self.fTime = fTime
+
+	func debugPrint() -> void:
+		print("\t\tRot:%s, time:%s" % [rot, fTime])
+
+static func readScaleKey(file : FileAccess) -> ScaleKey:
+	return ScaleKey.new(FileAccessUtils.read_vec3(file), file.get_float())
+
+class ScaleKey:
+	var scale : Vector3
+	var fTime : float
+
+	func _init(scale : Vector3, fTime : float) -> void:
+		self.scale = scale
+		self.fTime = fTime
+
+	func debugPrint() -> void:
+		print("\t\tScale:%s, time:%s" % [scale, fTime])
+
+static func readScaleRotKey(file : FileAccess, use_quat16 : bool) -> ScaleRotKey:
+	return ScaleRotKey.new(FileAccessUtils.read_quat(file, use_quat16), file.get_float())
+
+class ScaleRotKey:
+	var rot : Quaternion
+	var fTime : float
+
+	func _init(rot : Quaternion, fTime : float) -> void:
+		self.rot = rot
+		self.fTime = fTime
+
+	func debugPrint() -> void:
+		print("\t\tScaleRot:%s, time:%s" % [rot, fTime])
+
+static func readSkeletalSubMotion(file : FileAccess, use_quat16 : bool) -> SkeletalSubMotion:
+	var a : Quaternion = FileAccessUtils.read_quat(file, use_quat16)
+	var b : Quaternion = FileAccessUtils.read_quat(file, use_quat16)
+	var c : Quaternion = FileAccessUtils.read_quat(file, use_quat16)
+	var d : Quaternion = FileAccessUtils.read_quat(file, use_quat16)
+
+	var e : Vector3 = FileAccessUtils.read_pos(file)
+	var f : Vector3 = FileAccessUtils.read_vec3(file)
+	var g : Vector3 = FileAccessUtils.read_pos(file)
+	var h : Vector3 = FileAccessUtils.read_vec3(file)
+
+	var p : int = FileAccessUtils.read_int32(file)
+	var j : int = FileAccessUtils.read_int32(file)
+	var k : int = FileAccessUtils.read_int32(file)
+	var l : int = FileAccessUtils.read_int32(file)
+
+	var m : float = file.get_float()
+	var n : String = FileAccessUtils.read_xac_str(file)
+
+	var submotion : SkeletalSubMotion = SkeletalSubMotion.new(
+		a, b, c, d, # quats
+		e, f, g, h, # vec3
+		p, j, k, l, # ints
+		m, n
+	)
+	var poskeys : Array[PosKey] = []
+	var rotkeys : Array[RotKey] = []
+	var scalekeys : Array[ScaleKey] = []
+	var scalerotkeys : Array[ScaleRotKey] = []
+	#FIXME: Did paradox store the number of pos keys as a float instead of int?
+
+	for i : int in submotion.numPosKeys:
+		poskeys.push_back(readPosKey(file))
+	for i : int in submotion.numRotKeys:
+		rotkeys.push_back(readRotKey(file, use_quat16))
+	for i : int in submotion.numScaleKeys:
+		scalekeys.push_back(readScaleKey(file))
+	for i : int in submotion.numScaleRotKeys:
+		scalerotkeys.push_back(readScaleRotKey(file, use_quat16))
+	submotion.setPosKeys(poskeys)
+	submotion.setRotKeys(rotkeys)
+	submotion.setScaleKeys(scalekeys)
+	submotion.setScaleRotKeys(scalerotkeys)
+	return submotion
+
+class SkeletalSubMotion:
+	var poseRot : Quaternion
+	var bindPoseRot : Quaternion
+	var poseScaleRot : Quaternion
+	var bindPoseScaleRot : Quaternion
+	var posePos : Vector3
+	var poseScale : Vector3
+	var bindPosePos : Vector3
+	var bindPoseScale : Vector3
+	var numPosKeys : int # int32
+	var numRotKeys : int # int32
+	var numScaleKeys : int # int32
+	var numScaleRotKeys : int # int32
+	var fMaxError : float
+	var nodeName : String
+
+	var PosKeys : Array[PosKey]
+	var RotKeys : Array[RotKey]
+	var ScaleKeys : Array[ScaleKey]
+	var ScaleRotKeys : Array[ScaleRotKey]
+
+	func _init(
+		poseRot : Quaternion,
+		bindPoseRot : Quaternion,
+		poseScaleRot : Quaternion,
+		bindPoseScaleRot : Quaternion,
+		posePos : Vector3,
+		poseScale : Vector3,
+		bindPosePos : Vector3,
+		bindPoseScale : Vector3,
+		numPosKeys : int,
+		numRotKeys : int,
+		numScaleKeys : int,
+		numScaleRotKeys : int,
+		fMaxError : float,
+		nodeName : String
+	) -> void:
+		self.poseRot = poseRot
+		self.bindPoseRot = bindPoseRot
+		self.poseScaleRot = poseScaleRot
+		self.bindPoseScaleRot = bindPoseScaleRot
+		self.posePos = posePos
+		self.poseScale = poseScale
+		self.bindPosePos = bindPosePos
+		self.bindPoseScale = bindPoseScale
+		self.numPosKeys = numPosKeys
+		self.numRotKeys = numRotKeys
+		self.numScaleKeys = numScaleKeys
+		self.numScaleRotKeys = numScaleRotKeys
+		self.fMaxError = fMaxError
+		self.nodeName = nodeName
+
+	func setPosKeys(PosKeys : Array[PosKey]) -> void:
+		self.PosKeys = PosKeys
+
+	func setRotKeys(RotKeys : Array[RotKey]) -> void:
+		self.RotKeys = RotKeys
+
+	func setScaleKeys(ScaleKeys : Array[ScaleKey]) -> void:
+		self.ScaleKeys = ScaleKeys
+
+	func setScaleRotKeys(ScaleRotKeys : Array[ScaleRotKey]) -> void:
+		self.ScaleRotKeys = ScaleRotKeys
+
+	func debugPrint() -> void:
+		print("Node: %s, #PosKeys %d, #RotKeys %d, #ScaleKeys %d, #ScaleRotKeys %d" % [nodeName, numPosKeys, numRotKeys, numScaleKeys, numScaleRotKeys])
+		print("\tposeScaleRot %s,\tbindPoseScaleRot %s,\tposeScale %s,\tbindPoseScale %s" % [poseScaleRot, bindPoseScaleRot, poseScale, bindPoseScale])
+		for key : PosKey in PosKeys:
+			key.debugPrint()
+		for key : RotKey in RotKeys:
+			key.debugPrint()
+		for key : ScaleKey in ScaleKeys:
+			key.debugPrint()
+		for key : ScaleRotKey in ScaleRotKeys:
+			key.debugPrint()
+
+static func readBoneAnimationChunk(file : FileAccess, use_quat16 : bool) -> BoneAnimationChunk:
+	var numSubMotions : int = FileAccessUtils.read_int32(file)
+	var animChunk : BoneAnimationChunk = BoneAnimationChunk.new(numSubMotions)
+	var submotions : Array[SkeletalSubMotion] = []
+	for i : int in animChunk.numSubMotions:
+		submotions.push_back(readSkeletalSubMotion(file, use_quat16))
+	animChunk.setSkeletalSubMotions(submotions)
+	return animChunk
+
+class BoneAnimationChunk:
+	var numSubMotions : int # int32
+	var SkeletalSubMotions : Array[SkeletalSubMotion]
+
+	func _init(numSubMotions : int) -> void:
+		self.numSubMotions = numSubMotions
+
+	func setSkeletalSubMotions(SkeletalSubMotions : Array[SkeletalSubMotion]) -> void:
+		self.SkeletalSubMotions = SkeletalSubMotions
+
+	func debugPrint() -> void:
+		print("Number of Submotions: %d" % numSubMotions)
+		for submotion : SkeletalSubMotion in SkeletalSubMotions:
+			submotion.debugPrint()
diff --git a/game/src/Game/Model/flag.gdshader b/game/src/Game/Model/flag.gdshader
new file mode 100644
index 0000000..d338e36
--- /dev/null
+++ b/game/src/Game/Model/flag.gdshader
@@ -0,0 +1,26 @@
+shader_type spatial;
+
+render_mode cull_disabled;
+
+// Both vanilla flags use the same normal texture
+uniform uvec2 flag_dims;
+uniform sampler2D texture_flag_sheet_diffuse : source_color;
+uniform sampler2D texture_normal : hint_normal;
+
+instance uniform uint flag_index;
+
+uniform vec2 scroll_speed = vec2(-0.25,0);
+
+// Scroll the Normal map, but leave the albedo alone
+void fragment() {
+	uvec2 flag_sheet_dims = uvec2(textureSize(texture_flag_sheet_diffuse, 0));
+	uint scaled_index = flag_index * flag_dims.x;
+
+	uvec2 flag_pos = uvec2(scaled_index % flag_sheet_dims.x, scaled_index / flag_sheet_dims.x * flag_dims.y);
+
+	vec2 flag_uv = (vec2(flag_pos) + UV * vec2(flag_dims)) / vec2(flag_sheet_dims);
+
+	ALBEDO = texture(texture_flag_sheet_diffuse, flag_uv).rgb;
+	//ALBEDO = vec3(1, 0, 0);
+	NORMAL_MAP = texture(texture_normal, UV + TIME*scroll_speed).rgb;
+}
diff --git a/game/src/Game/Model/flag_mat.tres b/game/src/Game/Model/flag_mat.tres
new file mode 100644
index 0000000..beefd15
--- /dev/null
+++ b/game/src/Game/Model/flag_mat.tres
@@ -0,0 +1,7 @@
+[gd_resource type="ShaderMaterial" load_steps=2 format=3 uid="uid://5utra6tpdqag"]
+
+[ext_resource type="Shader" path="res://src/Game/Model/flag.gdshader" id="1_oqkkj"]
+
+[resource]
+render_priority = 0
+shader = ExtResource("1_oqkkj")
diff --git a/game/src/Game/Model/unit_colours.gdshader b/game/src/Game/Model/unit_colours.gdshader
new file mode 100644
index 0000000..dd0f5e2
--- /dev/null
+++ b/game/src/Game/Model/unit_colours.gdshader
@@ -0,0 +1,31 @@
+
+shader_type spatial;
+
+render_mode blend_mix, depth_draw_opaque, cull_disabled, diffuse_burley, specular_schlick_ggx;
+
+//hold all the textures for the units that need this shader to mix in their
+//nation colours (mostly generic infantry units)
+uniform sampler2D texture_albedo[32] : source_color, filter_linear_mipmap, repeat_enable;
+uniform sampler2D texture_nation_colors_mask[32] : source_color, filter_linear_mipmap, repeat_enable;
+
+instance uniform vec3 colour_primary : source_color;
+instance uniform vec3 colour_secondary : source_color;
+instance uniform vec3 colour_tertiary : source_color;
+
+//used to access the right textures since different units (with different textures)
+//will use this same shader
+instance uniform uint tex_index_specular;
+instance uniform uint tex_index_diffuse;
+
+void fragment() {
+	vec2 base_uv = UV;
+	vec4 albedo_tex = texture(texture_albedo[tex_index_diffuse], base_uv);
+	vec4 nation_colours_tex = texture(texture_nation_colors_mask[tex_index_specular], base_uv);
+
+	//set colours to either be white (1,1,1) or the nation colour based on the mask
+	vec3 primary_col = mix(vec3(1.0, 1.0, 1.0), colour_primary, nation_colours_tex.g);
+	vec3 secondary_col = mix(vec3(1.0, 1.0, 1.0), colour_secondary, nation_colours_tex.b);
+	vec3 tertiary_col = mix(vec3(1.0, 1.0, 1.0), colour_tertiary, nation_colours_tex.r);
+
+	ALBEDO = albedo_tex.rgb * primary_col * secondary_col * tertiary_col;
+}
diff --git a/game/src/Game/Model/unit_colours_mat.tres b/game/src/Game/Model/unit_colours_mat.tres
new file mode 100644
index 0000000..43ca523
--- /dev/null
+++ b/game/src/Game/Model/unit_colours_mat.tres
@@ -0,0 +1,9 @@
+[gd_resource type="ShaderMaterial" load_steps=2 format=3 uid="uid://bkham060cwpr3"]
+
+[ext_resource type="Shader" path="res://src/Game/Model/unit_colours.gdshader" id="1_axmiw"]
+
+[resource]
+render_priority = 0
+shader = ExtResource("1_axmiw")
+shader_parameter/texture_albedo = []
+shader_parameter/texture_nation_colors_mask = []