/*
 * Copyright © 2018 Keith Packard <keithp@keithp.com>
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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.
 */

load "footprint.5c"
import Footprint;

int pins = 8;

if (dim(argv) > 1)
	pins = atoi(argv[1]);

string name = sprintf("m50-31-%d", pins);

real pad_width = 0.74;
real pad_height = 1.30;
real package_extra_width = 1.67;
real pad_spacing = 1.27;
real total_height = 3.60;

real package_height = 1.80;
real package_width = 1.27 * (pins - 1) + package_extra_width;

real pad_gap = total_height - (pad_height * 2);
real pad_y_center = pad_gap / 2 + pad_height / 2;

real pad_y(int n) {
	if ((n & 1) != 0)
		return -pad_y_center;
	else
		return pad_y_center;
}

real pad_x(int n) {
	return (- (pins-1) / 2) * pad_spacing + (n-1) * pad_spacing;
}

void
m50_pad(int n) {
	pad_mm(pad_x(n), pad_y(n), pad_width, pad_height,
	       sprintf("%d", n),
	       sprintf("%d", n));
}

element_start(name);

rect(-package_width / 2, -package_height / 2, package_width, package_height);

for (int i = 1; i <= pins; i++)
	m50_pad(i);

element_end();