Manually Creating a Colormap: Difference between revisions
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== Writing a Matlab color map to xml == | == Writing a Matlab color map to xml == | ||
The following Matlab function writes a Matlab named [http://www.mathworks.com | The following Matlab function writes a Matlab named [http://www.mathworks.com/access/helpdesk/help/techdoc/ref/colormap.html color map] to the Paraview xml color map format. The argument to be passed in is the name of the colormap (default is 'jet'). | ||
<source lang=matlab> | <source lang=matlab> |
Latest revision as of 17:56, 27 January 2010
You can create an xml file like this:
<source lang=xml> <ColorMap name="Consistency" space="RGB"> <Point x="-1.000" o="1" r="0.0" g="0.0" b="0.0"/> <Point x="0.000" o="1" r="0.0" g="1.0" b="0.0"/> <Point x="1.000" o="1" r="1.0" g="0.0" b="0.0"/> </ColorMap> </source>
which specifies that values=-1 should be black (rgb=(0,0,0)), values at 0 should be green, and values at 1 should be red. You can then click "Edit color map" -> "Choose preset" -> "Import", select the new xml file, and you will see the colors are interpolated along the new color axis you have defined.
Writing a Matlab color map to xml
The following Matlab function writes a Matlab named color map to the Paraview xml color map format. The argument to be passed in is the name of the colormap (default is 'jet').
<source lang=matlab> function [] = paraview_color_space(scheme)
if (exist('scheme') ~= 1), scheme='jet'; end colors = eval(scheme); N = length(colors); fid = fopen([scheme '.xml'], 'w'); fprintf(fid, '<ColorMap name="%s" space="HSV">\n', scheme); for i=1:N x = [(i-1)/(N-1); colors(i,:)']; fprintf(fid, ' <Point x="%f" o="1" r="%f" g="%f" b="%f"/>\n', x); end fwrite(fid, '</ColorMap>'); fclose(fid);
end </source>