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-- Symbol names
local names_npn =
{
en = "NPN transistor",
cs = "Tranzistor NPN"
}
local names_pnp =
{
en = "PNP transistor",
cs = "Tranzistor PNP"
}
-- Render area in base units (X1, Y1, X2, Y2)
local area = {-2, -2, 2, 2}
-- Terminal points
local terminals = {{-2, 0}, {2, 2}, {2, -2}}
-- Rendering
local render = function (cr)
-- The terminals
cr.move_to (-2, 0)
cr.line_to (0, 0)
cr.move_to (0, 0.5)
cr.line_to (2, 2)
cr.move_to (0, -0.5)
cr.line_to (2, -2)
-- The ohmic connection
cr.move_to (0, -1)
cr.line_to (0, 1)
cr.stroke ()
end
local render_npn = function (cr)
render (cr)
cr.save ()
cr.translate (0, 0.5)
cr.rotate (math.atan2 (-2, 1.5))
cr.move_to (-0.4, 0.8)
cr.line_to (0, 1.4)
cr.line_to (0.4, 0.8)
cr.stroke ()
cr.restore ()
end
local render_pnp = function (cr)
render (cr)
cr.save ()
cr.translate (2, -2)
cr.rotate (math.atan2 (2, 1.5))
cr.move_to (-0.4, 1.3)
cr.line_to (0, 1.9)
cr.line_to (0.4, 1.3)
cr.stroke ()
cr.restore ()
end
-- Register the symbols
logdiag.register ("NPN", names_npn, area, terminals, render_npn)
logdiag.register ("PNP", names_pnp, area, terminals, render_pnp)
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