Add multiplexer metapost object.

diff --git a/Utils/Metapost.tex b/Utils/Metapost.tex
index e0177804afb2b8a55881c29be0151545fc80cf58..6c46ece6a82c7fb48103748dffa40a75cc7014b5 100644 (file)
--- a/Utils/Metapost.tex
+++ b/Utils/Metapost.tex
@@ -8,6 +8,7 @@ input metaobj;
 setObjectDefaultOption("Box")("framewidth")(.75mm);
 setObjectDefaultOption("Circle")("framewidth")(.75mm);
 setObjectDefaultOption("Circle")("circmargin")(3mm);
+setObjectDefaultOption("Mux")("framewidth")(.75mm);
 %ahlength := 1.5mm;
 ahangle := 60;
 
@@ -94,6 +95,57 @@ define_global_boolean_option("labels");
 setObjectDefaultOption("Reg")("reflect")(false);
 setObjectDefaultOption("Reg")("labels")(false);
 
+% Define a Multiplexer.
+vardef newMux@# text options=
+  ExecuteOptions(@#)(options);
+  assignObj(@#,"Mux");
+  StandardInterface;
+  % Add ports
+  ObjPoint inpa, inpb, out;
+ 
+  ObjCode MinimumStandardEquations,
+    % Make it a parallel trapezium
+    "xpart(@#ne - @#nw) = xpart(@#se - @#sw)",
+    "ypart(@#ne - @#nw) = -1 * ypart(@#se - @#sw)",
+    % Use a 22.5 degree angle for the sides
+    "ypart(@#nw) - ypart(@#ne) = xpart(@#ne-@#nw) / 2",
+    % With a specific width and height
+    "@#e-@#w = (" & decimal OptionValue@#("width") & ", 0mm)",
+    "@#n-@#s = (0mm, " & decimal OptionValue@#("height") & ")",
+    % And space the input ports evenly
+    "@#inpa = midpoint(@#nw, @#w)",
+    "@#inpb = midpoint(@#w, @#sw)",
+    "@#out = @#e"; 
+
+  StandardTies;
+enddef;
+
+% Draw a multiplexer
+def drawMux(suffix mux)=
+  draw mux.n -- mux.s;
+  % Use our bounding path to draw
+  drawFramedOrFilledObject_(mux);
+enddef;
+
+% Bounding path for a multiplexer
+def BpathMux(suffix n)=StandardBpath(n) enddef;
+
+% Define options
+define_local_numeric_option("width");
+define_local_numeric_option("height");
+setObjectDefaultOption("Mux")("width")(5mm);
+setObjectDefaultOption("Mux")("height")(20mm);
+setObjectDefaultOption("Mux")("framed")(true);
+% Overidden above
+%setObjectDefaultOption("Mux")("framewidth")(.5bp);
+setObjectDefaultOption("Mux")("framecolor")(black);
+setObjectDefaultOption("Mux")("framestyle")("");
+setObjectDefaultOption("Mux")("shadow")(false);
+setObjectDefaultOption("Mux")("shadowcolor")(black);
+setObjectDefaultOption("Mux")("filled")(false);
+setObjectDefaultOption("Mux")("fillcolor")(black);
+
+
 def midpoint(expr a, b) = ((a + b) / 2) enddef;
 
 \stopMPinclusions