1 files changed, 294 insertions, 0 deletions
diff --git a/extractor/gnd_format.gd b/extractor/gnd_format.gd
new file mode 100644
index 0000000..f13956e
--- /dev/null
+++ b/extractor/gnd_format.gd
@@ -0,0 +1,294 @@
+class_name GNDFormat
+
+
+## Byte Length: 4 [br]
+## GRAT
+var signature: String = "GRGN"
+
+## Byte Type: u8 [br]
+## Byte Length: 2
+var version: Version
+
+## Byte Type: i32 [br]
+## Byte Length: 4
+var width: int
+
+## Byte Type: i32 [br]
+## Byte Length: 4
+var height: int
+
+## Byte Type: f32 [br]
+## Byte Length: 4 [br]
+## Always 10.
+var scale: float
+
+## Byte Type: i32 [br]
+## Byte Length: 4
+var texture_count: int
+
+## Byte Type: i32 [br]
+## Byte Length: 4
+## Always 80.
+var texture_path_length: int
+
+## Byte Length: [member texture_count] * [member texture_path_length] [br]
+var texture_paths: Array
+
+## Byte Type: i32 [br]
+## Byte Length: 4
+var light_map_slice_count: int
+
+## Byte Type: i32 [br]
+## Byte Length: 4
+var light_map_width: int
+
+## Byte Type: i32 [br]
+## Byte Length: 4
+var light_map_slice_height: int
+
+## Byte Type: i32 [br]
+## Byte Length: 4
+var light_map_cells_per_grid: int
+
+## Length: [member light_map_slice_count]
+var light_map_slices: Array
+
+## Byte Type: i32 [br]
+## Byte Length: 4
+var surface_count: int
+
+## Length: [member surface_count]
+var surfaces: Array[Surface]
+
+## Length: [member width] * [member height]
+var ground_mesh_cubes: Array[GroundMeshCube]
+
+
+static func from_bytes(bytes: ByteStream) -> GNDFormat:
+	var gnd_format = GNDFormat.new()
+	
+	bytes.advance(gnd_format.signature.length())
+	
+	@warning_ignore("shadowed_variable")
+	var version = Version.new()
+	version.major = bytes.decode_u8()
+	version.minor = bytes.decode_u8()
+	gnd_format.version = version
+	
+	if version.minor > 7:
+		print(version)
+		return gnd_format
+	
+	gnd_format.width = bytes.decode_s32()
+	gnd_format.height = bytes.decode_s32()
+	gnd_format.scale = bytes.decode_float()
+	gnd_format.texture_count = bytes.decode_s32()
+	gnd_format.texture_path_length = bytes.decode_s32()
+	
+	gnd_format.texture_paths = []
+	for _n in gnd_format.texture_count:
+		gnd_format.texture_paths.append(
+			bytes.get_string_from_ascii(gnd_format.texture_path_length)
+		)
+	
+	gnd_format.light_map_slice_count = bytes.decode_s32()
+	gnd_format.light_map_width = bytes.decode_s32()
+	gnd_format.light_map_slice_height = bytes.decode_s32()
+	gnd_format.light_map_cells_per_grid = bytes.decode_s32()
+	
+	#gnd_format.light_map_slices = []
+	#for _n in gnd_format.light_map_slice_count:
+		#gnd_format.light_map_slices.append(LightMapSlice.from_bytes(bytes))
+	bytes.advance(
+		gnd_format.light_map_slice_count *
+		gnd_format.light_map_width *
+		gnd_format.light_map_slice_height *
+		4
+	)
+	
+	gnd_format.surface_count = bytes.decode_s32()
+	
+	gnd_format.surfaces = [] as Array[Surface]
+	for _n in gnd_format.surface_count:
+		gnd_format.surfaces.append(Surface.from_bytes(bytes))
+	
+	gnd_format.ground_mesh_cubes = [] as Array[GroundMeshCube]
+	for _n in (gnd_format.width * gnd_format.height):
+		gnd_format.ground_mesh_cubes.append(GroundMeshCube.from_bytes(bytes))
+	
+	#print(inst_to_dict(gnd_format))
+	return gnd_format
+
+
+class LightMapSlice:
+	## Byte Type: i32 [br]
+	## Byte Length: 4
+	var pixel_format: int
+	
+	## Byte Type: i32 [br]
+	## Byte Length: 4
+	var width: int
+	
+	## Byte Type: i32 [br]
+	## Byte Length: 4
+	var height: int
+	
+	## Byte Length: [member width] * [member height]
+	var shadow_map_pixels: ByteStream
+	
+	## Byte Length: [member width] * [member height]
+	var light_map_pixels: ByteStream
+	
+	
+	static func from_bytes(bytes: ByteStream) -> LightMapSlice:
+		var slice = LightMapSlice.new()
+		
+		slice.pixel_format = bytes.decode_s32()
+		slice.width = bytes.decode_s32()
+		slice.height = bytes.decode_s32()
+		slice.shadow_map_pixels = bytes.get_buffer(slice.width * slice.height)
+		slice.light_map_pixels = bytes.get_buffer(slice.width * slice.height)
+		
+		#print(inst_to_dict(slice))
+		return slice
+
+
+class Surface:
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	var u_bottom_left: float
+	
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	var u_bottom_right: float
+	
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	var u_top_left: float
+	
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	var u_top_right: float
+	
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	var v_bottom_left: float
+	
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	var v_bottom_right: float
+	
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	var v_top_left: float
+	
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	var v_top_right: float
+	
+	## Byte Type: i16 [br]
+	## Byte Length: 2
+	var texture_index: int
+	
+	## Byte Type: i16 [br]
+	## Byte Length: 2
+	var light_map_index: int
+	
+	## Byte Type: u8 [br]
+	## Byte Length: 1
+	var vertex_color_blue: int
+	
+	## Byte Type: u8 [br]
+	## Byte Length: 1
+	var vertex_color_green: int
+	
+	## Byte Type: u8 [br]
+	## Byte Length: 1
+	var vertex_color_red: int
+	
+	## Byte Type: u8 [br]
+	## Byte Length: 1
+	var vertex_color_alpha: int
+	
+	
+	func get_uvs() -> Dictionary: # Dictionary[Vector2, Vector2]
+		return {
+			Vector2(0, 0): Vector2(u_top_left, v_top_left),
+			Vector2(1, 0): Vector2(u_top_right, v_top_right),
+			Vector2(0, 1): Vector2(u_bottom_left, v_bottom_left),
+			Vector2(1, 1): Vector2(u_bottom_right, v_bottom_right),
+		}
+	
+	
+	static func from_bytes(bytes: ByteStream) -> Surface:
+		var surface = Surface.new()
+		
+		surface.u_bottom_left = bytes.decode_float()
+		surface.u_bottom_right = bytes.decode_float()
+		surface.u_top_left = bytes.decode_float()
+		surface.u_top_right = bytes.decode_float()
+		surface.v_bottom_left = bytes.decode_float()
+		surface.v_bottom_right = bytes.decode_float()
+		surface.v_top_left = bytes.decode_float()
+		surface.v_top_right = bytes.decode_float()
+		surface.texture_index = bytes.decode_s16()
+		surface.light_map_index = bytes.decode_s16()
+		surface.vertex_color_blue = bytes.decode_u8()
+		surface.vertex_color_green = bytes.decode_u8()
+		surface.vertex_color_red = bytes.decode_u8()
+		surface.vertex_color_alpha = bytes.decode_u8()
+		
+		#print(inst_to_dict(surface))
+		return surface
+
+
+class GroundMeshCube:
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	## upper left?
+	var bottom_left_height: float
+	
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	## upper right?
+	var bottom_right_height: float
+	
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	## lower left?
+	var top_left_height: float
+	
+	## Byte Type: f32 [br]
+	## Byte Length: 4
+	## lower right?
+	var top_right_height: float
+	
+	## Byte Type: i32 [br]
+	## Byte Length: 4
+	## top surface index?
+	var upwards_facing_surface_index: int
+	
+	## Byte Type: i32 [br]
+	## Byte Length: 4
+	## front surface index?
+	var northern_wall_surface_index: int
+	
+	## Byte Type: i32 [br]
+	## Byte Length: 4
+	## right surface index?
+	var eastern_wall_surface_index: int
+	
+	
+	static func from_bytes(bytes: ByteStream) -> GroundMeshCube:
+		var mesh = GroundMeshCube.new()
+		
+		mesh.bottom_left_height = bytes.decode_float()
+		mesh.bottom_right_height = bytes.decode_float()
+		mesh.top_left_height = bytes.decode_float()
+		mesh.top_right_height = bytes.decode_float()
+		mesh.upwards_facing_surface_index = bytes.decode_s32()
+		mesh.northern_wall_surface_index = bytes.decode_s32()
+		mesh.eastern_wall_surface_index = bytes.decode_s32()
+		
+		#print(inst_to_dict(mesh))
+		return mesh