added povray example

povray/ellipsoid/Makefile

@@ -0,0 +1,31 @@
+SOURCE = ellipsoid
+DELAY = 80
+DENSITY = 300
+WIDTH = 500
+
+make:
+	povray $(SOURCE).pov
+	make clean
+
+clean:
+	rm -rf  $(TARGET) *.class *.html *.log *.aux *.data *.gnuplot
+
+gif:
+	pdfcrop $(SOURCE).pdf
+	convert -verbose -delay $(DELAY) -loop 0 -density $(DENSITY) $(SOURCE)-crop.pdf $(SOURCE).gif
+	make clean
+
+png:
+	make
+	make svg
+	inkscape $(SOURCE).svg -w $(WIDTH) --export-png=$(SOURCE).png
+
+transparentGif:
+	convert $(SOURCE).pdf -transparent white result.gif
+	make clean
+
+svg:
+	#inkscape $(SOURCE).pdf --export-plain-svg=$(SOURCE).svg
+	pdf2svg $(SOURCE).pdf $(SOURCE).svg
+	# Necessary, as pdf2svg does not always create valid svgs:
+	inkscape $(SOURCE).svg --export-plain-svg=$(SOURCE).svg

povray/ellipsoid/ellipsoid.pov

@@ -0,0 +1,24 @@
+#include "colors.inc"
+#include "stones.inc"
+
+camera {
+  location <10, 10, 0>
+  look_at <0, 0, 0>
+}
+
+plane {
+  y, 0
+  pigment { checker color Gray color White  }
+}
+
+sphere {
+  <0, 0, 0>, 4  // center and radius
+  pigment { color White }
+  texture {T_Stone1}
+  finish {
+    reflection 0.1
+    phong 0.3
+  }
+}
+light_source { <5, 10, 10> color White }
+light_source { <10, 10, 5> color White }