Translated GIFPlot example to Guile Scheme.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@740 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/GIFPlot/Guile/full/Makefile

@@ -0,0 +1,20 @@
+TOP        = ../../..
+SWIG       = $(TOP)/../swig
+SWIGOPT    = -I../../Include
+SRCS       = 
+TARGET     = gifplot
+INTERFACE  = gifplot.i
+LIBS       = -L../.. -lgifplot -lm
+INCLUDE    = -I../../Include
+
+all:: static
+
+static::
+	$(MAKE) -f $(TOP)/Makefile SRCS='$(SRCS)' SWIG='$(SWIG)' \
+	INCLUDE='$(INCLUDE)' LIBS='$(LIBS)' SWIGOPT='$(SWIGOPT)' \
+	TARGET='gifguile' INTERFACE='$(INTERFACE)' guile_static
+
+clean::
+	rm -f *_wrap* *.o *~ *.so gifguile .~* core *.gif
+
+

SWIG/Examples/GIFPlot/Guile/full/README

@@ -0,0 +1,8 @@
+This example runs the entire gifplot.h header file through SWIG without
+any changes.  The Scheme program 'runme.scm' does something a little more 
+interesting.   You'll have to go look at the header file to get a complete
+listing of the functions.
+
+
+
+

SWIG/Examples/GIFPlot/Guile/full/gifplot.i

@@ -0,0 +1,17 @@
+/* Oh what the heck, let's just grab the whole darn header file
+   and see what happens. */
+
+%module gifplot
+%{
+
+/* Note: You still need this part because the %include directive
+   merely causes SWIG to interpret the contents of a file.  It doesn't
+   include the right include headers for the resulting C code */
+
+#include "gifplot.h"
+
+%}
+
+typedef unsigned int Pixel;
+
+%include gifplot.h

SWIG/Examples/GIFPlot/Guile/full/runme.scm

@@ -0,0 +1,63 @@
+;;; Plot a 3D function
+
+;; Here is the function to plot
+(define (func x y)
+  (* 5
+     (cos (* 2 (sqrt (+ (* x x) (* y y)))))
+     (exp (* -0.3 (sqrt (+ (* x x) (* y y)))))))
+
+;; Here are some plotting parameters
+(define xmin -5.0)
+(define xmax  5.0)
+(define ymin -5.0)
+(define ymax  5.0)
+(define zmin -5.0)
+(define zmax  5.0)
+
+;; Grid resolution
+(define nxpoints  60)
+(define nypoints  60)
+
+(define cmap (new-ColorMap "cmap"))
+(define frame (new-FrameBuffer 500 500))
+(FrameBuffer-clear frame (BLACK))
+
+(define p3 (new-Plot3D frame xmin ymin zmin xmax ymax zmax))
+(Plot3D-lookat p3 (* 2 (- zmax zmin)))
+(Plot3D-autoperspective p3 40)
+(Plot3D-rotu p3 60)
+(Plot3D-rotr p3 30)
+(Plot3D-rotd p3 10)
+
+(define (drawsolid)
+  (Plot3D-clear p3 (BLACK))
+  (Plot3D-start p3)
+  (let ((dx (/ (- xmax xmin) nxpoints))
+	(dy (/ (- ymax ymin) nypoints))
+	(cscale (/ 240 (- zmax zmin))))
+    (let x-loop ((x xmin) (i 0))
+      (cond
+       ((< i nxpoints)
+	(let y-loop ((y ymin) (j 0))
+	  (cond
+	   ((< j nypoints)
+	    (let* ((z1 (func x y))
+		   (z2 (func (+ x dx) y))
+		   (z3 (func (+ x dx) (+ y dy)))
+		   (z4 (func x (+ y dy)))
+		   (c1 (* cscale (- z1 zmin)))
+		   (c2 (* cscale (- z2 zmin)))
+		   (c3 (* cscale (- z3 zmin)))
+		   (c4 (* cscale (- z4 zmin)))
+		   (cc (/ (+ c1 c2 c3 c4) 4))
+		   (c  (min (max cc 239) 0)))
+	      (Plot3D-solidquad p3 x y z1 (+ x dx) y z2 (+ x dx) (+ y dy)
+				z3 x (+ y dy) z4 (+ c 16)))
+	    (y-loop (+ y dy) (+ j 1)))))
+	(x-loop (+ x dx) (+ i 1)))))))
+
+(display "Making a nice 3D plot...\n")
+(drawsolid)
+
+(FrameBuffer-writeGIF frame cmap "image.gif")
+(display "Wrote image.gif\n")