Re: [Plplot-devel] color alpha? Was Re: First pngcairo results for my FreeEOS research
On 2007-09-05 23:14-0500 Maurice LeBrun wrote: [...]I would prefer that if we were to support translucency in the core, every color have a translucency attribute (defaulting to none, i.e. the way it is now). Of course we'd need a bunch of new API calls for setting color values, maybe take the existing ones and add on a x (for extended), that allowed the user to specify RGB + translucency. I agree this is the way to go, and I sure hope somebody steps forward to implement it since translucency/transparency sure makes some cool-looking effects. Any other attributes needed? Not aware of any. Alan __ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __ Linux-powered Science __ - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
Re: [Plplot-devel] color alpha? Was Re: First pngcairo results for my FreeEOS research
Hazen Babcock writes: This reminds me that many graphics drivers these days support a color alpha (or translucency value) as well the standard red, green and blue. Any thoughts on extending PLplot to support this? It could be as simple as adding a alpha value to the PLStream data structure, which the user could set with say plsalpha, and which would be used or ignored by the graphics driver as appropriate. I've been interested in translucency for awhile now, but completely unable to find time to look into it. I'd avoid a plsalpha for the same reason that I deprecated plrgb() -- it's a whole lot nicer to set up a set of standard colors and calls to manipulate them. So I would prefer that if we were to support translucency in the core, every color have a translucency attribute (defaulting to none, i.e. the way it is now). Of course we'd need a bunch of new API calls for setting color values, maybe take the existing ones and add on a x (for extended), that allowed the user to specify RGB + translucency. Any other attributes needed? -- Maurice LeBrun - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
