Merge pull request #26 from FOSS-Supremacy/coords-fix

Fix coordinates system

scripts/classes/col_file.gd

@@ -32,11 +32,12 @@ func _init(file: FileAccess):
 
 class TBase:
 	func read_vector3(file: FileAccess) -> Vector3:
-		var result := Vector3()
-		result.x = file.get_float()
-		result.y = file.get_float()
-		result.z = file.get_float()
-		return result
+		# GTA3 uses a different coordinate system, so we need to convert
+		# the coordinates to Godot's coordinate system.
+		var x := file.get_float()
+		var y := file.get_float()
+		var z := file.get_float()
+		return Vector3(x, z, -y)
 
 class TBounds extends TBase:
 	var radius: float

scripts/map_builder.gd

@@ -57,10 +57,11 @@ func _read_ide_line(section: String, tokens: Array[String]):
 			items[id] = item
 		"2dfx":
 			var parent := tokens[0].to_int()
+			# Convert GTA to Godot coordinate system
 			var position := Vector3(
 				tokens[1].to_float(),
-				tokens[2].to_float(),
-				tokens[3].to_float() )
+				tokens[3].to_float(),
+				-tokens[2].to_float() )
 			var color := Color(
 				tokens[4].to_float() / 255,
 				tokens[5].to_float() / 255,
@@ -84,18 +85,21 @@ func _read_ipl_line(section: String, tokens: Array[String]):
 			var placement := ItemPlacement.new()
 			placement.id = tokens[0].to_int()
 			placement.model_name = tokens[1].to_lower()
+			# Convert GTA to Godot coordinate system
 			placement.position = Vector3(
 				tokens[2].to_float(),
-				tokens[3].to_float(),
-				tokens[4].to_float(), )
+				tokens[4].to_float(),
+				-tokens[3].to_float(), )
+			# Scale conversion follows the same pattern
 			placement.scale = Vector3(
 				tokens[5].to_float(),
-				tokens[6].to_float(),
-				tokens[7].to_float(), )
+				tokens[7].to_float(),
+				tokens[6].to_float(), )
+			# Quaternion conversion requires negating components
 			placement.rotation = Quaternion(
 				-tokens[8].to_float(),
-				-tokens[9].to_float(),
 				-tokens[10].to_float(),
+				-tokens[9].to_float(),
 				tokens[11].to_float(), )
 			placements.append(placement)
 
@@ -115,7 +119,6 @@ func _read_map_data(path: String, line_handler: Callable) -> void:
 
 func clear_map() -> void:
 	map = Node3D.new()
-	map.rotation.x = deg_to_rad(-90.0)
 
 func spawn_placement(ipl: ItemPlacement) -> Node3D:
 	return spawn(ipl.id, ipl.model_name, ipl.position, ipl.scale, ipl.rotation)
@@ -147,13 +150,31 @@ func spawn(id: int, model_name: String, position: Vector3, scale: Vector3, rotat
 			var colshape := CollisionShape3D.new()
 			if collision is ColFile.TBox:
 				var aabb := AABB()
-				aabb.position = collision.min
-				aabb.end = collision.max
+				# Get min and max positions from collision box
+				var min_pos := collision.min as Vector3
+				var max_pos := collision.max as Vector3
+				
+				# Ensure AABB has positive size by sorting min/max for each axis
+				aabb.position = Vector3(
+					min(min_pos.x, max_pos.x),
+					min(min_pos.y, max_pos.y),
+					min(min_pos.z, max_pos.z)
+				)
+				aabb.end = Vector3(
+					max(min_pos.x, max_pos.x),
+					max(min_pos.y, max_pos.y),
+					max(min_pos.z, max_pos.z)
+				)
+				
+				# Only create the shape if size is valid
+				if aabb.size.x > 0 and aabb.size.y > 0 and aabb.size.z > 0:
 					var shape := BoxShape3D.new()
 					shape.size = aabb.size
 					colshape.shape = shape
 					colshape.position = aabb.get_center()
 					sb.add_child(colshape)
+			else:
+				sb.add_child(colshape)
 		if item.colfile.vertices.size() > 0:
 			var colshape := CollisionShape3D.new()
 			var shape := ConcavePolygonShape3D.new()

scripts/map_test.gd

@@ -4,7 +4,6 @@ extends Node
 var suzanne := preload("res://prefabs/suzanne.tscn")
 
 func _ready() -> void:
-	world.rotation.x = deg_to_rad(-90.0)
 	var start := Time.get_ticks_msec()
 	var target = MapBuilder.placements.size()
 	var count := 0

scripts/model_test.gd

@@ -9,7 +9,6 @@ func _ready() -> void:
 	spinbox.rounded = true
 	spinbox.max_value = 0
 	misc = RWTextureDict.new(GameManager.open_file("models/misc.txd", FileAccess.READ))
-	meshinstance.rotation.x = deg_to_rad(-90.0)
 
 func _ld_dff() -> void:
 	var dialog := FileDialog.new()

scripts/renderware/rw_geometry.gd

@@ -110,17 +110,17 @@ func _init(file: FileAccess):
 		morph_t.has_normals = file.get_32() != 0
 		if morph_t.has_vertices:
 			for j in vert_count:
-				var vert := Vector3()
-				vert.x = file.get_float()
-				vert.y = file.get_float()
-				vert.z = file.get_float()
-				morph_t.vertices.append(vert)
+				# Convert GTA to Godot coordinate system
+				var x := file.get_float()
+				var y := file.get_float()
+				var z := file.get_float()
+				morph_t.vertices.append(Vector3(x, z, -y))
 		if morph_t.has_normals:
 			for j in vert_count:
 				var normal := Vector3()
 				normal.x = file.get_float()
-				normal.y = file.get_float()
 				normal.z = file.get_float()
+				normal.y = file.get_float()
 				morph_t.normals.append(normal)
 		morph_targets.append(morph_t)
 	material_list = RWMaterialList.new(file)

scripts/world.gd

@@ -7,7 +7,6 @@ extends Node
 var car := preload("res://scenes/car.tscn")
 
 func _ready() -> void:
-	world.rotation.x = deg_to_rad(-90.0)
 	var start := Time.get_ticks_msec()
 	var target = MapBuilder.placements.size()
 	var count := 0