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roundedcube.scad

// More information: https://danielupshaw.com/openscad-rounded-corners/

// Set to 0.01 for higher definition curves (renders slower)
$fs = 0.15;

module roundedcube(size = [1, 1, 1], center = false, radius = 0.5, apply_to = "all") {
	// If single value, convert to [x, y, z] vector
	size = (size[0] == undef) ? [size, size, size] : size;

	translate_min = radius;
	translate_xmax = size[0] - radius;
	translate_ymax = size[1] - radius;
	translate_zmax = size[2] - radius;

	diameter = radius * 2;

	obj_translate = (center == false) ?
		[0, 0, 0] : [
			-(size[0] / 2),
			-(size[1] / 2),
			-(size[2] / 2)
		];

	translate(v = obj_translate) {
		hull() {
			for (translate_x = [translate_min, translate_xmax]) {
				x_at = (translate_x == translate_min) ? "min" : "max";
				for (translate_y = [translate_min, translate_ymax]) {
					y_at = (translate_y == translate_min) ? "min" : "max";
					for (translate_z = [translate_min, translate_zmax]) {
						z_at = (translate_z == translate_min) ? "min" : "max";

						translate(v = [translate_x, translate_y, translate_z])
						if (
							(apply_to == "all") ||
							(apply_to == "xmin" && x_at == "min") || (apply_to == "xmax" && x_at == "max") ||
							(apply_to == "ymin" && y_at == "min") || (apply_to == "ymax" && y_at == "max") ||
							(apply_to == "zmin" && z_at == "min") || (apply_to == "zmax" && z_at == "max")
						) {
							sphere(r = radius);
						} else {
							rotate = 
								(apply_to == "xmin" || apply_to == "xmax" || apply_to == "x") ? [0, 90, 0] : (
								(apply_to == "ymin" || apply_to == "ymax" || apply_to == "y") ? [90, 90, 0] :
								[0, 0, 0]
							);
							rotate(a = rotate)
							cylinder(h = diameter, r = radius, center = true);
						}
					}
				}
			}
		}
	}
}

I'm running into a bug which rears its ugly head when one tries to set a radius for the cylinder of a single-axis rounding and the radius is larger than one or more of the dimensions of the object. I have an object where the thickness is 0.125 and the radius is 0.325. It makes the thickness of the object larger to compensate, which kinda sucks. It seems like the problem lies with the definitions of the translate variables at the top. If I can find the time, I will see about submitting a fix later.

It looks like @ggs67's fork fixes this. I think it would be a good idea to replace your code with theirs.

Yes, I'm glad you found that. It's been a while since I've been able to design or print but was aware of some forks... would you say that's the most ideal one to redirect people to when that issue crops up? https://gist.github.com/ggs67/ff6ba8caf5a1871d285c5c758dce0575