NopSCADlib/utils/layout.scad

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2019-06-08 17:10:47 -04:00
//
// NopSCADlib Copyright Chris Palmer 2018
// nop.head@gmail.com
// hydraraptor.blogspot.com
//
// This file is part of NopSCADlib.
//
// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
// GNU General Public License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with NopSCADlib.
// If not, see <https://www.gnu.org/licenses/>.
//
//
//! Layout objects in a line with equal gaps given a vector of their widths.
//
include <../global_defs.scad>
function layout_offset(widths, i, gap = 2) = //! Calculate the offset for the ```i```th item
i == 0 ? widths[0] / 2
: layout_offset(widths, i - 1, gap) + widths[i - 1] / 2 + gap + widths[i] / 2;
module layout(widths, gap = 2, no_offset = false) //! Layout children passing ```$i```
translate([no_offset ? -widths[0] / 2 : 0, 0])
for($i = [0 : 1 : len(widths) - 1])
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translate([layout_offset(widths, $i, gap), 0])
children();