How to get the ik position of a spine constraint?

Questions
1

Hi there is spine.set_ik_target_position(), but is there anyway to get the ik_target position?

Maybe let’s say i want to move / translate the ik position by vmath.vector3(100, 100, 0), is it possible to do it?

Thank you

2

Yes, it is possible. To get the IK (Inverse Kinematics) position, you need to check the “Create Go Bones” option.


function init(self)
    self.b = false
    self.ori_pos = vmath.vector3(900, 100, 0)

    self.spine_go = "/go#spinemodel"
    self.ik_constraint_id = "target"
    spine.set_ik_target_position(self.spine_go, self.ik_constraint_id, self.ori_pos)
    self.target_go = spine.get_go(self.spine_go, "target")

    label.set_text("/go#pos_label", "IK pos : " .. tostring(self.ori_pos))
    msg.post(".", "acquire_input_focus")
end

function update(self, dt)
    print("Target world pos: ", go.get_world_position(self.target_go))
end

function on_input(self, action_id, action)
    if action_id == hash("touch") and action.pressed then
        local pos = vmath.vector3(100, 100, 0)
        self.b = not self.b
        if not self.b then
            pos = self.ori_pos
        end
        spine.set_ik_target_position(self.spine_go, self.ik_constraint_id, pos)
        label.set_text("/go#pos_label", "IK pos : " .. tostring(pos))
    end
end

1
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画面収録 2025-11-28 23.29.46

2 Likes
3

Sorry, but how to get the ori_pos position? the code above hardcode the ori_pos