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Change how Cairo is presented to Lua scripts.

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Makes the whole thing a bit more stable and less weird.
This commit is contained in:
Přemysl Eric Janouch
2012-08-12 06:10:27 +02:00
parent 9366c42026
commit a1b79a55d2
20 changed files with 385 additions and 374 deletions
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50
share/library/Active/bipolar.lua
View File

@@ -26,50 +26,50 @@ 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 (-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)
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:move_to (0, -1)
cr:line_to (0, 1)
cr.stroke ()
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: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:move_to (-0.4, 0.8)
cr:line_to (0, 1.4)
cr:line_to (0.4, 0.8)
cr.stroke ()
cr.restore ()
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: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:move_to (-0.4, 1.3)
cr:line_to (0, 1.9)
cr:line_to (0.4, 1.3)
cr.stroke ()
cr.restore ()
cr:stroke ()
cr:restore ()
end
-- Register the symbols

54
share/library/Active/igfet.lua
View File

@@ -27,59 +27,59 @@ local terminals_p = {{-2, -1}, {2, 1}, {2, 0}, {2, -1}}
-- Rendering
local render = function (cr)
-- The terminals
cr.move_to (-0.3, 1)
cr.line_to (-0.3, -1)
cr:move_to (-0.3, 1)
cr:line_to (-0.3, -1)
cr.move_to (0, 1)
cr.line_to (2, 1)
cr:move_to (0, 1)
cr:line_to (2, 1)
cr.move_to (0, 0)
cr.line_to (2, 0)
cr:move_to (0, 0)
cr:line_to (2, 0)
cr.move_to (0, -1)
cr.line_to (2, -1)
cr:move_to (0, -1)
cr:line_to (2, -1)
-- Source, gate, drain
cr.move_to (0, -1.5)
cr.line_to (0, -0.5)
cr:move_to (0, -1.5)
cr:line_to (0, -0.5)
cr.move_to (0, -0.3)
cr.line_to (0, 0.3)
cr:move_to (0, -0.3)
cr:line_to (0, 0.3)
cr.move_to (0, 0.5)
cr.line_to (0, 1.5)
cr:move_to (0, 0.5)
cr:line_to (0, 1.5)
cr.stroke ()
cr:stroke ()
end
local render_n = function (cr)
render (cr)
-- The left-side terminal
cr.move_to (-2, 1)
cr.line_to (-0.3, 1)
cr:move_to (-2, 1)
cr:line_to (-0.3, 1)
-- The arrow
cr.move_to (0.9, -0.4)
cr.line_to (0.4, 0)
cr.line_to (0.9, 0.4)
cr:move_to (0.9, -0.4)
cr:line_to (0.4, 0)
cr:line_to (0.9, 0.4)
cr.stroke ()
cr:stroke ()
end
local render_p = function (cr)
render (cr)
-- The left-side terminal
cr.move_to (-2, -1)
cr.line_to (-0.3, -1)
cr:move_to (-2, -1)
cr:line_to (-0.3, -1)
-- The arrow
cr.move_to (0.4, -0.4)
cr.line_to (0.9, 0)
cr.line_to (0.4, 0.4)
cr:move_to (0.4, -0.4)
cr:line_to (0.9, 0)
cr:line_to (0.4, 0.4)
cr.stroke ()
cr:stroke ()
end
-- Register the symbols

38
share/library/Active/jfet.lua
View File

@@ -27,47 +27,47 @@ local terminals_p = {{-2, -1}, {2, 1}, {2, -1}}
-- Rendering
local render = function (cr)
-- The terminals
cr.move_to (0, 1)
cr.line_to (2, 1)
cr:move_to (0, 1)
cr:line_to (2, 1)
cr.move_to (0, -1)
cr.line_to (2, -1)
cr:move_to (0, -1)
cr:line_to (2, -1)
-- The ohmic connection
cr.move_to (0, -1.5)
cr.line_to (0, 1.5)
cr:move_to (0, -1.5)
cr:line_to (0, 1.5)
cr.stroke ()
cr:stroke ()
end
local render_n = function (cr)
render (cr)
-- The left-side terminal
cr.move_to (-2, 1)
cr.line_to (0, 1)
cr:move_to (-2, 1)
cr:line_to (0, 1)
-- The arrow
cr.move_to (-1, 0.6)
cr.line_to (-0.5, 1)
cr.line_to (-1, 1.4)
cr:move_to (-1, 0.6)
cr:line_to (-0.5, 1)
cr:line_to (-1, 1.4)
cr.stroke ()
cr:stroke ()
end
local render_p = function (cr)
render (cr)
-- The left-side terminal
cr.move_to (-2, -1)
cr.line_to (0, -1)
cr:move_to (-2, -1)
cr:line_to (0, -1)
-- The arrow
cr.move_to (-0.4, -0.6)
cr.line_to (-1, -1)
cr.line_to (-0.4, -1.4)
cr:move_to (-0.4, -0.6)
cr:line_to (-1, -1)
cr:line_to (-0.4, -1.4)
cr.stroke ()
cr:stroke ()
end
-- Register the symbols

24
share/library/Logical/and.lua
View File

@@ -17,23 +17,23 @@ local terminals = {{-4, -1}, {-4, 1}, {5, 0}}
-- Rendering
local render = function (cr)
-- The main shape
cr.move_to (-2, -2)
cr.line_to (1, -2)
cr.arc (1, 0, 2, math.pi * 1.5, math.pi * 0.5)
cr.line_to (-2, 2)
cr.close_path ()
cr:move_to (-2, -2)
cr:line_to (1, -2)
cr:arc (1, 0, 2, math.pi * 1.5, math.pi * 0.5)
cr:line_to (-2, 2)
cr:close_path ()
-- The terminals
cr.move_to (-4, -1)
cr.line_to (-2, -1)
cr:move_to (-4, -1)
cr:line_to (-2, -1)
cr.move_to (-4, 1)
cr.line_to (-2, 1)
cr:move_to (-4, 1)
cr:line_to (-2, 1)
cr.move_to (3, 0)
cr.line_to (5, 0)
cr:move_to (3, 0)
cr:line_to (5, 0)
cr.stroke ()
cr:stroke ()
end
-- Register the symbol

22
share/library/Logical/not.lua
View File

@@ -17,23 +17,23 @@ local terminals = {{-4, 0}, {4, 0}}
-- Rendering
local render = function (cr)
-- The triangle
cr.move_to (-2, -2)
cr.line_to (2, 0)
cr.line_to (-2, 2)
cr.close_path ()
cr:move_to (-2, -2)
cr:line_to (2, 0)
cr:line_to (-2, 2)
cr:close_path ()
-- The circle
cr.new_sub_path ()
cr.arc (2.25, 0, 0.25, 0, 2 * math.pi)
cr:new_sub_path ()
cr:arc (2.25, 0, 0.25, 0, 2 * math.pi)
-- The terminals
cr.move_to (-4, 0)
cr.line_to (-2, 0)
cr:move_to (-4, 0)
cr:line_to (-2, 0)
cr.move_to (2.5, 0)
cr.line_to (4, 0)
cr:move_to (2.5, 0)
cr:line_to (4, 0)
cr.stroke ()
cr:stroke ()
end
-- Register the symbol

46
share/library/Logical/or.lua
View File

@@ -17,38 +17,38 @@ local terminals = {{-4, -1}, {-4, 1}, {5, 0}}
-- Rendering
local render = function (cr)
-- The main shape
cr.move_to (-2, -2)
cr.line_to (0, -2)
cr.curve_to (2, -2, 3, 0, 3, 0)
cr.curve_to (3, 0, 2, 2, 0, 2)
cr.line_to (-2, 2)
cr.curve_to (-1, 1, -1, -1, -2, -2)
cr.stroke ()
cr:move_to (-2, -2)
cr:line_to (0, -2)
cr:curve_to (2, -2, 3, 0, 3, 0)
cr:curve_to (3, 0, 2, 2, 0, 2)
cr:line_to (-2, 2)
cr:curve_to (-1, 1, -1, -1, -2, -2)
cr:stroke ()
-- The terminals
cr.save ()
cr:save ()
-- Crop the contacts according to
-- the left side of the main shape
cr.move_to (-4, 2)
cr.line_to (-2, 2)
cr.curve_to (-1, 1, -1, -1, -2, -2)
cr.line_to (-4, -2)
cr.close_path ()
cr.clip ()
cr:move_to (-4, 2)
cr:line_to (-2, 2)
cr:curve_to (-1, 1, -1, -1, -2, -2)
cr:line_to (-4, -2)
cr:close_path ()
cr:clip ()
cr.move_to (-4, -1)
cr.line_to (-1, -1)
cr:move_to (-4, -1)
cr:line_to (-1, -1)
cr.move_to (-4, 1)
cr.line_to (-1, 1)
cr:move_to (-4, 1)
cr:line_to (-1, 1)
cr.stroke ()
cr.restore ()
cr:stroke ()
cr:restore ()
cr.move_to (3, 0)
cr.line_to (5, 0)
cr.stroke ()
cr:move_to (3, 0)
cr:line_to (5, 0)
cr:stroke ()
end
-- Register the symbol

18
share/library/Misc/cell.lua
View File

@@ -17,20 +17,20 @@ local terminals = {{-1, 0}, {1, 0}}
-- Rendering
local render = function (cr)
-- The vertical lines
cr.move_to (-0.2, -1)
cr.line_to (-0.2, 1)
cr:move_to (-0.2, -1)
cr:line_to (-0.2, 1)
cr.move_to (0.2, -2)
cr.line_to (0.2, 2)
cr:move_to (0.2, -2)
cr:line_to (0.2, 2)
-- The terminals
cr.move_to (-1, 0)
cr.line_to (-0.2, 0)
cr:move_to (-1, 0)
cr:line_to (-0.2, 0)
cr.move_to (0.2, 0)
cr.line_to (1, 0)
cr:move_to (0.2, 0)
cr:line_to (1, 0)
cr.stroke ()
cr:stroke ()
end
-- Register the symbol

18
share/library/Misc/ground.lua
View File

@@ -17,20 +17,20 @@ local terminals = {{0, -1}}
-- Rendering
local render = function (cr)
-- The vertical line
cr.move_to (0, -1)
cr.line_to (0, 0.5)
cr:move_to (0, -1)
cr:line_to (0, 0.5)
-- The horizontal lines
cr.move_to (-1, 0.5)
cr.line_to (1, 0.5)
cr:move_to (-1, 0.5)
cr:line_to (1, 0.5)
cr.move_to (-0.75, 1.1)
cr.line_to (0.75, 1.1)
cr:move_to (-0.75, 1.1)
cr:line_to (0.75, 1.1)
cr.move_to (-0.5, 1.7)
cr.line_to (0.5, 1.7)
cr:move_to (-0.5, 1.7)
cr:line_to (0.5, 1.7)
cr.stroke ()
cr:stroke ()
end
-- Register the symbol

4
share/library/Misc/junction.lua
View File

@@ -17,8 +17,8 @@ local terminals = {}
-- Rendering
local render = function (cr)
-- The disk
cr.arc (0, 0, 0.3, 0, math.pi * 2)
cr.fill ()
cr:arc (0, 0, 0.3, 0, math.pi * 2)
cr:fill ()
end
-- Register the symbol

30
share/library/Misc/lamp.lua
View File

@@ -17,29 +17,29 @@ local terminals = {{-2, 0}, {2, 0}}
-- Rendering
local render = function (cr)
-- The circle
cr.save ()
cr:save ()
cr.arc (0, 0, 1, 0, 2 * math.pi)
cr.stroke_preserve ()
cr.clip ()
cr:arc (0, 0, 1, 0, 2 * math.pi)
cr:stroke_preserve ()
cr:clip ()
cr.move_to (-1, -1)
cr.line_to (1, 1)
cr:move_to (-1, -1)
cr:line_to (1, 1)
cr.move_to (1, -1)
cr.line_to (-1, 1)
cr:move_to (1, -1)
cr:line_to (-1, 1)
cr.stroke ()
cr.restore ()
cr:stroke ()
cr:restore ()
-- The terminals
cr.move_to (-2, 0)
cr.line_to (-1, 0)
cr:move_to (-2, 0)
cr:line_to (-1, 0)
cr.move_to (1, 0)
cr.line_to (2, 0)
cr:move_to (1, 0)
cr:line_to (2, 0)
cr.stroke ()
cr:stroke ()
end
-- Register the symbol

42
share/library/Misc/meters.lua
View File

@@ -35,45 +35,45 @@ local terminals = {{-2, 0}, {2, 0}, {0, -2}, {0, 2}}
-- Rendering
local render_A = function (cr)
-- The circle
cr.arc (0, 0, 2, 0, math.pi * 2)
cr:arc (0, 0, 2, 0, math.pi * 2)
-- The letter A
cr.move_to (-0.4, 0.5)
cr.line_to (0, -0.5)
cr.line_to (0.4, 0.5)
cr:move_to (-0.4, 0.5)
cr:line_to (0, -0.5)
cr:line_to (0.4, 0.5)
cr.move_to (-0.3, 0.25)
cr.line_to (0.3, 0.25)
cr:move_to (-0.3, 0.25)
cr:line_to (0.3, 0.25)
cr.stroke ()
cr:stroke ()
end
local render_V = function (cr)
-- The circle
cr.arc (0, 0, 2, 0, math.pi * 2)
cr:arc (0, 0, 2, 0, math.pi * 2)
-- The letter V
cr.move_to (-0.4, -0.5)
cr.line_to (0, 0.5)
cr.line_to (0.4, -0.5)
cr:move_to (-0.4, -0.5)
cr:line_to (0, 0.5)
cr:line_to (0.4, -0.5)
cr.stroke ()
cr:stroke ()
end
local render_ohm = function (cr)
-- The circle
cr.arc (0, 0, 2, 0, math.pi * 2)
cr:arc (0, 0, 2, 0, math.pi * 2)
-- The capital letter omega
cr.move_to (-0.5, 0.5)
cr.line_to (-0.15, 0.5)
cr.curve_to (-0.15, 0.5, -0.4, 0.3, -0.4, 0)
cr.curve_to (-0.4, -0.25, -0.25, -0.5, 0, -0.5)
cr.curve_to (0.25, -0.5, 0.4, -0.25, 0.4, 0)
cr.curve_to (0.4, 0.3, 0.15, 0.5, 0.15, 0.5)
cr.line_to (0.5, 0.5)
cr:move_to (-0.5, 0.5)
cr:line_to (-0.15, 0.5)
cr:curve_to (-0.15, 0.5, -0.4, 0.3, -0.4, 0)
cr:curve_to (-0.4, -0.25, -0.25, -0.5, 0, -0.5)
cr:curve_to (0.25, -0.5, 0.4, -0.25, 0.4, 0)
cr:curve_to (0.4, 0.3, 0.15, 0.5, 0.15, 0.5)
cr:line_to (0.5, 0.5)
cr.stroke ()
cr:stroke ()
end
-- Register the symbols

16
share/library/Misc/signs.lua
View File

@@ -26,21 +26,21 @@ local terminals = {}
-- Rendering
local render_plus = function (cr)
-- The plus sign
cr.move_to (0, -0.4)
cr.line_to (0, 0.4)
cr:move_to (0, -0.4)
cr:line_to (0, 0.4)
cr.move_to (-0.4, 0)
cr.line_to (0.4, 0)
cr:move_to (-0.4, 0)
cr:line_to (0.4, 0)
cr.stroke ()
cr:stroke ()
end
local render_minus = function (cr)
-- The minus sign
cr.move_to (-0.4, 0)
cr.line_to (0.4, 0)
cr:move_to (-0.4, 0)
cr:line_to (0.4, 0)
cr.stroke ()
cr:stroke ()
end
-- Register the symbols

14
share/library/Misc/switch.lua
View File

@@ -17,17 +17,17 @@ local terminals = {{-2, 0}, {2, 0}}
-- Rendering
local render = function (cr)
-- The switch contact
cr.move_to (1.3, -1.3)
cr.line_to (-1, 0)
cr:move_to (1.3, -1.3)
cr:line_to (-1, 0)
-- The terminals
cr.move_to (-2, 0)
cr.line_to (-1, 0)
cr:move_to (-2, 0)
cr:line_to (-1, 0)
cr.move_to (1, 0)
cr.line_to (2, 0)
cr:move_to (1, 0)
cr:line_to (2, 0)
cr.stroke ()
cr:stroke ()
end
-- Register the symbol

8
share/library/Misc/terminal.lua
View File

@@ -17,13 +17,13 @@ local terminals = {{-1, 0}}
-- Rendering
local render = function (cr)
-- The circle
cr.arc (0, 0, 0.3, 0, math.pi * 2)
cr:arc (0, 0, 0.3, 0, math.pi * 2)
-- The contact
cr.move_to (-1, 0)
cr.line_to (-0.3, 0)
cr:move_to (-1, 0)
cr:line_to (-0.3, 0)
cr.stroke ()
cr:stroke ()
end
-- Register the symbol

24
share/library/Misc/voltage-source.lua
View File

@@ -26,35 +26,35 @@ local terminals = {{-2, 0}, {2, 0}, {0, -2}, {0, 2}}
-- Rendering
local render = function (cr)
-- The circle
cr.arc (0, 0, 2, 0, math.pi * 2)
cr:arc (0, 0, 2, 0, math.pi * 2)
cr.stroke ()
cr:stroke ()
end
local render_ac = function (cr)
render (cr)
-- The AC symbol
cr.move_to (-1, 0.25)
cr.curve_to (-0.4, -1.5, 0.4, 1.5, 1, -0.25)
cr:move_to (-1, 0.25)
cr:curve_to (-0.4, -1.5, 0.4, 1.5, 1, -0.25)
cr.stroke ()
cr:stroke ()
end
local render_dc = function (cr)
render (cr)
-- The DC symbol
cr.move_to (-1, -0.25)
cr.line_to (1, -0.25)
cr:move_to (-1, -0.25)
cr:line_to (1, -0.25)
cr.move_to (-1, 0.25)
cr.line_to (-0.2, 0.25)
cr:move_to (-1, 0.25)
cr:line_to (-0.2, 0.25)
cr.move_to (0.2, 0.25)
cr.line_to (1, 0.25)
cr:move_to (0.2, 0.25)
cr:line_to (1, 0.25)
cr.stroke ()
cr:stroke ()
end
-- Register the symbols

18
share/library/Passive/capacitor.lua
View File

@@ -17,20 +17,20 @@ local terminals = {{-2, 0}, {2, 0}}
-- Rendering
local render = function (cr)
-- The vertical lines
cr.move_to (-0.2, -1)
cr.line_to (-0.2, 1)
cr:move_to (-0.2, -1)
cr:line_to (-0.2, 1)
cr.move_to (0.2, -1)
cr.line_to (0.2, 1)
cr:move_to (0.2, -1)
cr:line_to (0.2, 1)
-- The terminals
cr.move_to (-2, 0)
cr.line_to (-0.2, 0)
cr:move_to (-2, 0)
cr:line_to (-0.2, 0)
cr.move_to (0.2, 0)
cr.line_to (2, 0)
cr:move_to (0.2, 0)
cr:line_to (2, 0)
cr.stroke ()
cr:stroke ()
end
-- Register the symbol

68
share/library/Passive/diode.lua
View File

@@ -45,79 +45,79 @@ local terminals = {{-2, 0}, {2, 0}}
-- Rendering
local render = function (cr)
-- The triangle
cr.move_to (-1, -1)
cr.line_to (1, 0)
cr.line_to (-1, 1)
cr.line_to (-1, -1)
cr:move_to (-1, -1)
cr:line_to (1, 0)
cr:line_to (-1, 1)
cr:line_to (-1, -1)
-- The vertical line
cr.move_to (1, 1)
cr.line_to (1, -1)
cr:move_to (1, 1)
cr:line_to (1, -1)
-- The terminals
cr.move_to (-2, 0)
cr.line_to (2, 0)
cr:move_to (-2, 0)
cr:line_to (2, 0)
cr.stroke ()
cr:stroke ()
end
local render_zener = function (cr)
render (cr)
cr.move_to (1, 1)
cr.line_to (0.5, 1)
cr:move_to (1, 1)
cr:line_to (0.5, 1)
cr.stroke ()
cr:stroke ()
end
local render_arrow = function (cr)
cr.move_to (0, 0)
cr.line_to (0, -1.5)
cr:move_to (0, 0)
cr:line_to (0, -1.5)
cr.stroke ()
cr:stroke ()
cr.move_to (-0.3, -0.7)
cr.line_to (0, -1.5)
cr.line_to (0.3, -0.7)
cr.close_path ()
cr:move_to (-0.3, -0.7)
cr:line_to (0, -1.5)
cr:line_to (0.3, -0.7)
cr:close_path ()
cr.fill ()
cr:fill ()
end
local render_radiation = function (cr)
cr.save ()
cr.translate (-0.4, 0)
cr:save ()
cr:translate (-0.4, 0)
render_arrow (cr)
cr.restore ()
cr:restore ()
cr.save ()
cr.translate (0.4, 0)
cr:save ()
cr:translate (0.4, 0)
render_arrow (cr)
cr.restore ()
cr:restore ()
end
local render_led = function (cr)
render (cr)
cr.save ()
cr.translate (-0.3, -1.0)
cr.rotate (math.atan2 (1, 1))
cr:save ()
cr:translate (-0.3, -1.0)
cr:rotate (math.atan2 (1, 1))
render_radiation (cr)
cr.restore ()
cr:restore ()
end
local render_photo = function (cr)
render (cr)
cr.save ()
cr.translate (0.75, -2.05)
cr.rotate (math.atan2 (-1, -1))
cr:save ()
cr:translate (0.75, -2.05)
cr:rotate (math.atan2 (-1, -1))
render_radiation (cr)
cr.restore ()
cr:restore ()
end
-- Register the symbol

16
share/library/Passive/inductor.lua
View File

@@ -26,22 +26,22 @@ local terminals = {{-2, 0}, {2, 0}}
-- Rendering
local render = function (cr)
-- The arcs
cr.arc (-1.5, 0, 0.5, math.pi, 0)
cr.arc (-0.5, 0, 0.5, math.pi, 0)
cr.arc (0.5, 0, 0.5, math.pi, 0)
cr.arc (1.5, 0, 0.5, math.pi, 0)
cr:arc (-1.5, 0, 0.5, math.pi, 0)
cr:arc (-0.5, 0, 0.5, math.pi, 0)
cr:arc (0.5, 0, 0.5, math.pi, 0)
cr:arc (1.5, 0, 0.5, math.pi, 0)
cr.stroke ()
cr:stroke ()
end
local render_core = function (cr)
render (cr)
-- The core
cr.move_to (-2, -1)
cr.line_to (2, -1)
cr:move_to (-2, -1)
cr:line_to (2, -1)
cr.stroke ()
cr:stroke ()
end
-- Register the symbols

64
share/library/Passive/resistor.lua
View File

@@ -38,63 +38,63 @@ 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)
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 (-2, 0)
cr:line_to (-1.5, 0)
cr.move_to (1.5, 0)
cr.line_to (2, 0)
cr:move_to (1.5, 0)
cr:line_to (2, 0)
cr.stroke ()
cr:stroke ()
end
local render_adj = function (cr)
render (cr)
-- The arrow
cr.move_to (-1, 1)
cr.line_to (1, -1)
cr:move_to (-1, 1)
cr:line_to (1, -1)
cr.stroke ()
cr:stroke ()
cr.save ()
cr.translate (1.5, -1.5)
cr.rotate (math.atan2 (1, 1))
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: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 ()
cr:fill ()
cr:restore ()
end
local render_pot = function (cr)
render (cr)
-- The contact
cr.move_to (0, -2)
cr.line_to (2, -2)
cr:move_to (0, -2)
cr:line_to (2, -2)
-- The arrow
cr.move_to (0, -2)
cr.line_to (0, -1)
cr:move_to (0, -2)
cr:line_to (0, -1)
cr.stroke ()
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:move_to (0, -0.5)
cr:line_to (0.3, -1.3)
cr:line_to (-0.3, -1.3)
cr:close_path ()
cr.fill ()
cr:fill ()
end
-- Register the symbol