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/Logical/and.lua

@@ -8,7 +8,7 @@ local names =
 -- Render area in base units (X1, Y1, X2, Y2)
 local area = {-4, -2, 5, 2}
 
--- Terminals
+-- Terminal points
 local terminals = {{-4, -1}, {-4, 1}, {5, 0}}
 
 -- Rendering
@@ -19,19 +19,17 @@ local render = function (cr)
 	cr.arc (1, 0, 2, math.pi * 1.5, math.pi * 0.5)
 	cr.line_to (-2, 2)
 	cr.close_path ()
-	cr.stroke ()
 
-	-- The contacts
+	-- The terminals
 	cr.move_to (-4, -1)
 	cr.line_to (-2, -1)
-	cr.stroke ()
 
 	cr.move_to (-4, 1)
 	cr.line_to (-2, 1)
-	cr.stroke ()
 
 	cr.move_to (3, 0)
 	cr.line_to (5, 0)
+
 	cr.stroke ()
 end
 

share/library/Logical/not.lua

@@ -8,7 +8,7 @@ local names =
 -- Render area in base units (X1, Y1, X2, Y2)
 local area = {-4, -2, 4, 2}
 
--- Terminals
+-- Terminal points
 local terminals = {{-4, 0}, {4, 0}}
 
 -- Rendering
@@ -18,20 +18,18 @@ local render = function (cr)
 	cr.line_to (2, 0)
 	cr.line_to (-2, 2)
 	cr.close_path ()
-	cr.stroke ()
 
 	-- The circle
 	cr.new_sub_path ()
 	cr.arc (2.25, 0, 0.25, 0, 2 * math.pi)
-	cr.stroke ()
 
-	-- The contacts
+	-- The terminals
 	cr.move_to (-4, 0)
 	cr.line_to (-2, 0)
-	cr.stroke ()
 
 	cr.move_to (2.5, 0)
 	cr.line_to (4, 0)
+
 	cr.stroke ()
 end
 

share/library/Logical/or.lua

@@ -8,7 +8,7 @@ local names =
 -- Render area in base units (X1, Y1, X2, Y2)
 local area = {-4, -2, 5, 2}
 
--- Terminals
+-- Terminal points
 local terminals = {{-4, -1}, {-4, 1}, {5, 0}}
 
 -- Rendering
@@ -22,7 +22,7 @@ local render = function (cr)
 	cr.curve_to (-1, 1, -1, -1, -2, -2)
 	cr.stroke ()
 
-	-- The contacts
+	-- The terminals
 	cr.save ()
 
 	-- Crop the contacts according to
@@ -36,12 +36,11 @@ local render = function (cr)
 
 	cr.move_to (-4, -1)
 	cr.line_to (-1, -1)
-	cr.stroke ()
 
 	cr.move_to (-4, 1)
 	cr.line_to (-1, 1)
-	cr.stroke ()
 
+	cr.stroke ()
 	cr.restore ()
 
 	cr.move_to (3, 0)