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-- Symbol name
local names =
{
en = "Resistor",
cs = "Rezistor",
sk = "Rezistor"
}
local names_adj =
{
en = "Adjustable resistor",
cs = "Nastavitelný rezistor",
sk = "Nastaviteľný rezistor"
}
local names_pot =
{
en = "Potentiometer",
cs = "Potenciometr",
sk = "Potenciometer"
}
-- Render area in base units (X1, Y1, X2, Y2)
local area = {-2, -0.5, 2, 0.5}
local area_adj = {-2, -1.5, 2, 1}
local area_pot = {-2, -2, 2, 0.5}
-- Terminal points
local terminals = {{-2, 0}, {2, 0}}
local terminals_pot = {{-2, 0}, {2, 0}, {2, -2}}
-- Rendering
local render = function (cr)
-- The rectangle
cr.move_to (-1.5, -0.5)
cr.line_to (1.5, -0.5)
cr.line_to (1.5, 0.5)
cr.line_to (-1.5, 0.5)
cr.line_to (-1.5, -0.5)
-- The terminals
cr.move_to (-2, 0)
cr.line_to (-1.5, 0)
cr.move_to (1.5, 0)
cr.line_to (2, 0)
cr.stroke ()
end
local render_adj = function (cr)
render (cr)
-- The arrow
cr.move_to (-1, 1)
cr.line_to (1, -1)
cr.stroke ()
cr.save ()
cr.translate (1.5, -1.5)
cr.rotate (math.atan2 (1, 1))
cr.move_to (0, 0)
cr.line_to (0.3, 0.8)
cr.line_to (-0.3, 0.8)
cr.close_path ()
cr.fill ()
cr.restore ()
end
local render_pot = function (cr)
render (cr)
-- The contact
cr.move_to (0, -2)
cr.line_to (2, -2)
-- The arrow
cr.move_to (0, -2)
cr.line_to (0, -1)
cr.stroke ()
cr.move_to (0, -0.5)
cr.line_to (0.3, -1.3)
cr.line_to (-0.3, -1.3)
cr.close_path ()
cr.fill ()
end
-- Register the symbol
logdiag.register ("Resistor",
names, area, terminals, render)
logdiag.register ("ResistorAdjustable",
names_adj, area_adj, terminals, render_adj)
logdiag.register ("Potentiometer",
names_pot, area_pot, terminals_pot, render_pot)
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