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Diagram Editor with scalable graphics. An easy-to-use tool for drawing boards and pieces of any size and color.[All Comments] [Add Comment or Rating]

💡📝H. G. Muller wrote on Thu, Nov 23, 2023 08:12 AM UTC in reply to Bob Greenwade from 12:45 AM:

This happens to be what many of the "modifier" icons (Relay, Korean, Ski) are for, so a single icon can yield dozens of pieces.

Such modifier icons are a novel concept; the renderer's feature for creating compound glyphs was originally intended for combining symbols for stand-alone pieces. There is some fine tuning of the combination process that can be controlled by the default.ini file in the folder with the SVG images, like demagnification and shift. The amount that is clipped away of the rear piece might even be one of those. (This was all done so long ago that I am not sure how it worked anymore.) In that case I could disable the clipping entirely for Greenwade. And if not, such a global parameter could be added.

The alternative would be to use different characters for combining with and without clipping. E.g. a + instead of a - for unclipped overwriting.

[Edit] OK, I checked out how it works. The default.ini file contained a line

compound 64 52 0 3 40

to control the combining of icons. The parameters here (all in units of 1/64 times the square size) are horizontal and vertical size of the component images, the horizontal shift between the two, a 'fudge factor', and the part of the rear icon that is shown. They are than renedered such that the rear piece touches the top of the square, and the front piece the bottom. Both would be centered horizontally, irrespective of their horizontal resizing, unless a horizontal shift is specified. (Which would then shift ther rear icon to the right, and the front icon to the left from the central position). The fudge factor has to do with fow much flipped pieces are moved vertically. (If a set clings very much to the bottom of the squares, you don't want the flipped pieces to hang from the top.) The final value describes how much of the rear piece is shown, starting from the top.

The default values for these parameters are 50, 50, 14, 0, and 64. But this changed when I copied the default.ini from Alfaerie to the Greenwade directory, in order to control the default colors. I now changed the clipping parameter back to 64. (Flush the cache to see how this affects the generated images!)