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--- root:colorscheme [2010/05/05 14:16] – created decianm
+++ root:colorscheme [2010/08/24 17:10] (current) – abuechle
@@ Line 12: / Line 12: @@
 TColor::CreateGradientColorTable(NRGBs, stops, red, green, blue, NCont);
 gStyle->SetNumberContours(NCont);
+</code>
+and for python:
+<code>
+from array import array
+def set_palette(name="palette", ncontours=999):
+    """Set a color palette from a given RGB list
+    stops, red, green and blue should all be lists of the same length
+    see set_decent_colors for an example"""
+    if name == "gray" or name == "grayscale":
+        stops = [0.00, 0.34, 0.61, 0.84, 1.00]
+        red   = [1.00, 0.84, 0.61, 0.34, 0.00]
+        green = [1.00, 0.84, 0.61, 0.34, 0.00]
+        blue  = [1.00, 0.84, 0.61, 0.34, 0.00]
+    # elif name == "whatever":
+        # (define more palettes)
+    else:
+        # default palette, looks cool
+        stops = [0.00, 0.34, 0.61, 0.84, 1.00]
+        red   = [0.00, 0.00, 0.87, 1.00, 0.51]
+        green = [0.00, 0.81, 1.00, 0.20, 0.00]
+        blue  = [0.51, 1.00, 0.12, 0.00, 0.00]
+    s = array('d', stops)
+    r = array('d', red)
+    g = array('d', green)
+    b = array('d', blue)
+    npoints = len(s)
+    TColor.CreateGradientColorTable(npoints, s, r, g, b, ncontours)
+    gStyle.SetNumberContours(ncontours)
 </code>

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