Godot RC 1.1 mouse control template

var yaw = 0
var pitch = 0
var in_motion = false
var mouse_motion_scale = 2.5
var mouse_motion = Vector2()
var left_mouse_dow = false
var right_mouse_dow = false
var middle_mouse_dow = false

func _input(event):
    if event.type == InputEvent.MOUSE_MOTION:
        #mouse_motion = event.speed / get_viewport().get_rect().size * mouse_motion_ratio
        mouse_motion = event.relative_pos / get_viewport().get_rect().size * mouse_motion_scale

    elif event.type == InputEvent.MOUSE_BUTTON:
        if event.button_index == 1:
            left_mouse_dow = event.pressed
        elif event.button_index == 2:
            right_mouse_dow = event.pressed
            in_motion = event.pressed
        elif event.button_index == 3:
            middle_mouse_dow = event.pressed



func _process(delta):
    var transf = get_transform()

    if right_mouse_dow:
        if in_motion:
            yaw += mouse_motion.x * PI
            if yaw<-PI:
                yaw = PI+PI+yaw
            else:
                if yaw>PI:
                    yaw -= PI + PI
            pitch += mouse_motion.y * PI
            if pitch<-PI:
                pitch = PI+PI+pitch
            else:
                if pitch>PI:
                    pitch -= PI + PI

            var tr = Transform().rotated(Vector3(0,1,0),yaw).rotated(Vector3(1,0,0),pitch)
            #tr.origin = get_transform().origin
            transf.basis = tr.basis