Rotating a square 360

Questions
1

Hi everyone!
I want to rotate a square with the left and right buttons in de z axis. I want to rotate it without a maxim angle.
I’ve done this but is not what I want, because it has a maximum angle and it dosen’t rotate constant!

– Constants
local turn_speed = 0.05 – Slerp factor
*local max_steer_angle_left = vmath.quat_rotation_z(math.pi ) *
*local max_steer_angle_right = vmath.quat_rotation_z(-math.pi ) *

function init(self)

  • – Acquire input focus so we can react to input*
  • msg.post(".", “acquire_input_focus”)*
  • – Some variables*
  • self.steer_angle = vmath.quat()*
    end

function update(self, dt)

  • – Set the game object’s rotation to the direction*
    end

function on_message(self, message_id, message, sender)

  • if message_id == hash(“left”) then*
  •    -- Interpolate the steering angle.*

  •    self.steer_angle = vmath.slerp(turn_speed, self.steer_angle, max_steer_angle_left)*

  •    go.set_rotation(self.steer_angle, "Square")*
  • elseif message_id == hash(“right”) then*
  •    -- Interpolate the steering angle.*

  •    self.steer_angle = vmath.slerp(turn_speed, self.steer_angle, max_steer_angle_right)*

  •    go.set_rotation(self.steer_angle, "Square")*
  • end*
    end

function on_input(self, action_id, action)

  • if action_id == hash(“left”) then*
  •   msg.post("#", "left")*
  • elseif action_id == hash(“right”) then*
  •   msg.post("#", "right")*
  • end*
    end

Thanks in advance!

2

How about just:

local angle = math.pi/60  -- 2 seconds/turn in 60 fps

function on_message(self, message_id, message, sender)
	local old_rot = go.get_rotation()

	if message_id == hash("rotate_left") then
		go.set_rotation(old_rot * vmath.quat_rotation_z(angle))
	elseif message_id == hash("rotate_right") then
		go.set_rotation(old_rot * vmath.quat_rotation_z(-angle))
	end
end
2 Likes
3

Thank’s a lot sicher, this was exactly what I was looking for, thank you!

1 Like