Something wrong when Inheriting boat velocity in complexprojectile component

Actually this issue has existed since long time before, and i'd share you my terrible moment at first of all :

SOLUTION:

function ComplexProjectile:Launch(targetPos, attacker, owningweapon)
	......

    self:CalculateTrajectory(pos, targetPos, self.horizontalSpeed)

	-- if the attacker is standing on a moving platform, then inherit it's velocity too
	local attacker_platform = attacker ~= nil and attacker:GetCurrentPlatform() or nil
	if attacker_platform ~= nil then
		local vx, vy, vz = attacker_platform.Physics:GetVelocity()
      ---------------------- HERE'S THE FIX ----------------------
      vx, vz = VecUtil_RotateDir(vx, vz, self.inst.Transform:GetRotation() * DEGREES)
      ------------------------------------------------------------
	   self.velocity.x = self.velocity.x + vx
	   self.velocity.z = self.velocity.z + vz
	end

    if self.onlaunchfn ~= nil then
        self.onlaunchfn(self.inst, attacker, targetPos)
    end

    self.inst:AddTag("activeprojectile")
    self.inst:StartUpdatingComponent(self)
end

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by the way, i'll appreciate a lot if another issue of boat can be fixed:

the boat has been prevented multiple collisions with the same object in very short time periods , it works and no leak spawn when the boat reach the shore after the first collision with shore(TheWorld's ID existed in boat_physics._recent_collisions). while reloading the game will make the collision happens since the recent collision table is cleared.