Made navmesh demo work in Godot 3.0

.gitignore

@@ -2,6 +2,7 @@
 .import/
 export.cfg
 export_presets.cfg
+*.import
 
 # System/tool-specific ignores
 .directory

3d/navmesh/navmesh.gd

@@ -0,0 +1,93 @@
+
+extends Navigation
+
+# Member variables
+const SPEED = 4.0
+
+var camrot = 0.0
+
+var begin = Vector3()
+var end = Vector3()
+var m = SpatialMaterial.new()
+
+var path = []
+var draw_path = true
+
+
+func _process(delta):
+	if (path.size() > 1):
+		var to_walk = delta*SPEED
+		var to_watch = Vector3(0, 1, 0)
+		while(to_walk > 0 and path.size() >= 2):
+			var pfrom = path[path.size() - 1]
+			var pto = path[path.size() - 2]
+			to_watch = (pto - pfrom).normalized()
+			var d = pfrom.distance_to(pto)
+			if (d <= to_walk):
+				path.remove(path.size() - 1)
+				to_walk -= d
+			else:
+				path[path.size() - 1] = pfrom.linear_interpolate(pto, to_walk/d)
+				to_walk = 0
+		
+		var atpos = path[path.size() - 1]
+		var atdir = to_watch
+		atdir.y = 0
+		
+		var t = Transform()
+		t.origin = atpos
+		t=t.looking_at(atpos + atdir, Vector3(0, 1, 0))
+		get_node("robot_base").set_transform(t)
+		
+		if (path.size() < 2):
+			path = []
+			set_process(false)
+	else:
+		set_process(false)
+
+
+func _update_path():
+	var p = get_simple_path(begin, end, true)
+	path = Array(p) # Vector3array too complex to use, convert to regular array
+	path.invert()
+	set_process(true)
+
+	if (draw_path):
+		var im = get_node("draw")
+		im.set_material_override(m)
+		im.clear()
+		im.begin(Mesh.PRIMITIVE_POINTS, null)
+		im.add_vertex(begin)
+		im.add_vertex(end)
+		im.end()
+		im.begin(Mesh.PRIMITIVE_LINE_STRIP, null)
+		for x in p:
+			im.add_vertex(x)
+		im.end()
+
+
+func _input(event):
+#	if (event extends InputEventMouseButton and event.button_index == BUTTON_LEFT and event.pressed):
+	if (event.is_class("InputEventMouseButton") and event.button_index == BUTTON_LEFT and event.pressed):
+		var from = get_node("cambase/Camera").project_ray_origin(event.position)
+		var to = from + get_node("cambase/Camera").project_ray_normal(event.position)*100
+		var p = get_closest_point_to_segment(from, to)
+		
+		begin = get_closest_point(get_node("robot_base").get_translation())
+		end = p
+
+		_update_path()
+	
+	if (event.is_class("InputEventMouseMotion")):
+		if (event.button_mask&(BUTTON_MASK_MIDDLE+BUTTON_MASK_RIGHT)):
+			camrot += event.relative.x*0.005
+			get_node("cambase").set_rotation(Vector3(0, camrot, 0))
+			print("camrot ", camrot)
+
+
+func _ready():
+	set_process_input(true)
+
+	m.flags_unshaded = true
+	m.flags_use_point_size = true
+	m.albedo_color = Color(1.0, 1.0, 1.0, 1.0)

3d/navmesh/project.godot

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+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+; 
+; Format: 
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=3
+
+[application]
+
+config/name="Navmesh Demo"
+run/main_scene="res://navmesh.scn"
+config/icon="res://icon.png"
+
+[gdnative]
+
+singletons=[  ]