From 299ce010bd8f2f5a65e4fa5a033a122b318b8c83 Mon Sep 17 00:00:00 2001
From: Přemysl Janouch <p.janouch@gmail.com>
Date: Fri, 11 Feb 2011 18:37:00 +0100
Subject: Update the symbol library.

* Add bipolar, IGFET and JFET transistors.
* Add more variants to some symbols.
* Add a symbol for a simple terminal.
* Avoid unneccessary stroke() calls.
* Fix comments.
---
 share/library/Passive/resistor.lua | 76 ++++++++++++++++++++++++++++++++++----
 1 file changed, 69 insertions(+), 7 deletions(-)

(limited to 'share/library/Passive/resistor.lua')

diff --git a/share/library/Passive/resistor.lua b/share/library/Passive/resistor.lua
index 262969b..f59f20e 100644
--- a/share/library/Passive/resistor.lua
+++ b/share/library/Passive/resistor.lua
@@ -5,11 +5,26 @@ local names =
 	cs = "Rezistor"
 }
 
+local names_adj =
+{
+	en = "Adjustable resistor",
+	cs = "Nastavitelný rezistor"
+}
+
+local names_pot =
+{
+	en = "Potentiometer",
+	cs = "Potenciometr"
+}
+
 -- Render area in base units (X1, Y1, X2, Y2)
-local area = {-2, -0.5, 2, 0.5}
+local area     = {-2, -0.5, 2, 0.5}
+local area_adj = {-2, -1.5, 2, 1}
+local area_pot = {-2, -2, 2, 0.5}
 
--- Terminals
-local terminals = {{-2, 0}, {2, 0}}
+-- Terminal points
+local terminals     = {{-2, 0}, {2, 0}}
+local terminals_pot = {{-2, 0}, {2, 0}, {2, -2}}
 
 -- Rendering
 local render = function (cr)
@@ -19,19 +34,66 @@ local render = function (cr)
 	cr.line_to (1.5, 0.5)
 	cr.line_to (-1.5, 0.5)
 	cr.line_to (-1.5, -0.5)
-	cr.stroke ()
 
-	-- The contacts
+	-- The terminals
 	cr.move_to (-2, 0)
 	cr.line_to (-1.5, 0)
-	cr.stroke ()
 
 	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 ("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)
 
 
-- 
cgit v1.2.3-54-g00ecf