Spring RTS Engine

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function widget:GetInfo()
	return {
		name      = "MiddleClickCameraSwitcher",
		desc      = "^^^^^^^^^^^^^^^^^^^^^^^^^",
		author    = "Auswaschbar",
		version   = "v1.0",
		date      = "Dec, 2009",
		license   = "GNU GPL, v3 or later",
		layer     = 9000,
		enabled   = true,
	}
end

-- FPSController          // 0
-- OverheadController     // 1
-- TWController           // 2
-- RotOverheadController  // 3
-- FreeController         // 4
-- SmoothController       // 5
-- OrbitController        // 6
-- OverviewController     // 7
	
function widget:MousePress(mx, my, button)
	local alt,ctrl,meta,shift = Spring.GetModKeyState()
	if (button == 2 and (shift or ctrl)) then
		local oldcamstate = Spring.GetCameraState()
		local newcamstate =
		{
			mode = (oldcamstate.mode + 1) % 6, -- exclude overview and orbit
			px = oldcamstate.px,
			py = oldcamstate.py,
			pz = oldcamstate.pz,
		}
		Spring.SetCameraState(newcamstate, 1)
		return true
	end
	return false
end