Revert rev 11918 "merge revisions 11872:11876 from trunk to gsoc2008-maciekd branch - license changes"

This reverts commit ec942f04ca8b33520442f079e2ea2d8d3e4be73c.

From: William S Fulton <wsf@fultondesigns.co.uk>

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/branches/gsoc2008-maciekd@13032 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/GIFPlot/Python/full/runme.py

@@ -0,0 +1,64 @@
+# Plot a 3D function
+# This example uses the low-level C interface.
+
+from _gifplot import *
+from math import *
+
+# Here is the function to plot
+def func(x,y):
+	return 5*cos(2*sqrt(x*x+y*y))*exp(-0.3*sqrt(x*x+y*y))
+
+# Here are some plotting parameters
+xmin = -5.0
+xmax =  5.0
+ymin = -5.0
+ymax =  5.0
+zmin = -5.0
+zmax =  5.0
+
+# Grid resolution
+nxpoints =  60
+nypoints =  60
+
+cmap  = new_ColorMap("cmap")
+frame = new_FrameBuffer(500,500)
+FrameBuffer_clear(frame,BLACK)
+
+p3    = new_Plot3D(frame,xmin,ymin,zmin,xmax,ymax,zmax)
+Plot3D_lookat(p3,2*max([xmax-xmin,ymax-ymin,zmax-zmin]))
+Plot3D_autoperspective(p3,40)
+Plot3D_rotu(p3,60)
+Plot3D_rotr(p3,30)
+Plot3D_rotd(p3,10)
+
+def drawsolid():
+	Plot3D_clear(p3,BLACK)
+	Plot3D_start(p3)
+	dx = 1.0*(xmax-xmin)/nxpoints
+	dy = 1.0*(ymax-ymin)/nypoints
+	cscale = 240.0/(zmax-zmin)
+	x = xmin
+	for i in xrange(0,nxpoints):
+		y = ymin
+		for j in xrange(0,nypoints):
+			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)
+			c = int((c1+c2+c3+c4)/4)
+			if (c < 0) : c = 0
+			if c > 239 : c = 239
+			Plot3D_solidquad(p3,x,y,z1,x+dx,y,z2,x+dx,y+dy,z3,x,y+dy,z4,c+16)
+			y = y + dy		
+		x = x + dx
+
+print "Making a nice 3D plot..."
+drawsolid()
+
+FrameBuffer_writeGIF(frame,cmap,"image.gif")
+print "Wrote image.gif"
+