Monthly Archive for August, 2009

The projection used in videogames usually deviates slightly from “true” isometric due to the limitations of raster graphics. Lines in the x and y directions would not follow a neat pixel pattern if drawn in the required 30° to the horizontal. While modern computers can eliminate this problem using anti-aliasing, earlier computer graphics did not support enough colors or possess enough CPU power to accomplish this. So instead, a 2:1 pixel pattern ratio would be used to draw the x and y axis lines, resulting in these axes following a 26.565° (arctan 0.5) angle to the horizontal. (Game systems that do not use square pixels could, however, yield different angles, including true isometric.) Therefore, this form of projection is more accurately described as a variation of dimetric projection, since only two of the three angles between the axes are equal (116.565°, 116.565°, 126.87°). Many in video game and pixel art communities, however, continue to colloquially refer to this projection as “isometric perspective”; the terms “3/4 perspective” and “2.5D” are also commonly used.

The well known way is svn export. Some times this command is not applicable. You can use this simple shell command in this case (Linux/*nix only).

find destination/directory_name/ -name .svn -type d | xargs -n 1 rm -rf

You need to change destination/directory_name/ to your real path, what you want clean.