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cameo/gerber.c: crudely support some cases of G03

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This commit is contained in:
Werner Almesberger 2013-09-20 18:28:19 -03:00
parent 44d58a54fa
commit 7aaaf8671f
1 changed files with 51 additions and 2 deletions
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53
cameo/gerber.c
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@ -1,8 +1,8 @@
/*
* gerber.c - Gerber file input
*
* Written 2010 by Werner Almesberger
* Copyright 2010 Werner Almesberger
* Written 2010, 2013 by Werner Almesberger
* Copyright 2010, 2013 Werner Almesberger
*
* 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
@ -21,6 +21,7 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "path.h"
#include "gerber.h"
@ -31,6 +32,45 @@
#define KU2MM(in) ((in)/10000.0*25.4)
/*
* @@@ Very crude implementation of G03. Tested with only one example in
* KiCad.
*
* Command definition from:
* http://www.rulabinsky.com/cavd/text/chapa.html
*/
static void arc(struct path *path, const char *buf, double ax, double ay)
{
int xi, yi, cxi, cyi;
double bx, by, cx, cy;
double r, a, b, t;
double x, y;
if (sscanf(buf, "G03X%dY%dI%dJ%dD01*\n", &xi, &yi, &cxi, &cyi) != 4)
return;
bx = KU2MM(xi);
by = KU2MM(yi);
cx = KU2MM(cxi);
cy = KU2MM(cyi);
r = hypot(cx, cy);
cx += ax;
cy += ay;
a = atan2(ay-cy, ax-cx);
b = atan2(by-cy, bx-cx);
if (a > b)
b += 2*M_PI;
//fprintf(stderr, "@(%g,%g) (%g,%g)-(%g-%g) %g %g\n",
// cx, cy, ax, ay, bx, by, a/M_PI*180, b/M_PI*180);
for (t = a; t <= b; t += M_PI/180) { /* @@@ 1 deg increment */
x = cx+r*cos(t);
y = cy+r*sin(t);
path_add(path, x, y, 0);
}
path_add(path, bx, by, 0);
}
struct path *gerber_read(const char *name, double r_tool_default)
{
FILE *file;
@ -65,6 +105,15 @@ struct path *gerber_read(const char *name, double r_tool_default)
}
continue;
}
if (!strncmp(buf, "G03", 3)) {
if (path)
abort();
path = path_new(r_tool_default, name);
*anchor = path;
anchor = &path->next;
arc(path, buf, start_x, start_y);
continue;
}
if (sscanf(buf, "X%dY%dD%d*\n", &xi, &yi, &d) != 3)
continue;
x = KU2MM(xi);