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cameo: don't duplicate paths already cleared by the outline

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Also pass information on whether we're about to enter or leave a
polygon.
This commit is contained in:
Werner Almesberger 2012-03-18 17:57:04 -03:00
parent 35c0624dc5
commit 5a599e14f6
1 changed files with 18 additions and 15 deletions
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23
cameo/area.c
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@ -182,7 +182,7 @@ printf("\tna %g (%g) nb %g (%g)\n", na, fx+tx*na, nb, fx+tx*nb);
static int hit_path(double fx, double fy, double tx, double ty,
const struct path *path, int inside, double r, double *x)
const struct path *path, int inside, int enter, double r, double *x)
{
const struct point *p;
int left;
@ -234,7 +234,8 @@ static const struct path **subordinates(const struct path *paths,
static void do_line(const struct path *path, const struct path **sub,
double xa, double xb, double y, double r_tool, struct path **res)
double xa, double xb, double y, double r_tool, double overlap,
struct path **res)
{
const struct path *last = path;
const struct path **s;
@ -242,25 +243,27 @@ static void do_line(const struct path *path, const struct path **sub,
double x, next;
printf(" y=%g\n", y);
if (!hit_path(xa-3*r_tool, y, xb, y, last, 1, r_tool, &x))
if (!hit_path(xa-3*r_tool, y, xb, y, last, 1, 0, r_tool, &x))
return;
while (1) {
printf(" x=%g\n", x);
next = xb;
last = NULL;
if (hit_path(x, y, xb, y, path, 1, r_tool, &next))
if (hit_path(x, y, xb, y, path, 1, 1, r_tool, &next))
last = path;
for (s = sub; *s; s++)
if (hit_path(x, y, next, y, *s, 0, r_tool, &next))
if (hit_path(x, y, next, y, *s, 0, 1, r_tool, &next))
last = *s;
if (next-x > 2*r_tool-2*overlap) {
new = path_new(r_tool, "");
path_add(new, x, y, path->first->z);
path_add(new, next, y, path->first->z);
new->next = *res;
*res = new;
}
if (!last)
return;
if (!hit_path(next+EPSILON, y, xb, y, last, last == path,
if (!hit_path(next+EPSILON, y, xb, y, last, last == path, 0,
r_tool, &x))
return;
}
@ -291,14 +294,14 @@ static void fill_path(const struct path *paths, const struct path *path,
return;
sub = subordinates(paths, path);
xa += r_tool;
ya += r_tool;
ya += 3*r_tool-overlap;
xb -= r_tool;
yb -= r_tool;
yb -= 3*r_tool-overlap;
n = ceil((yb-ya)/(2*r_tool-overlap));
printf("x[%g:%g] y[%g:%g] n=%d\n", xa, xb, ya, yb, n);
for (i = 0; i <= n; i++)
do_line(path, sub, xa, xb, ya+(yb-ya)*((double) i/n), r_tool,
res);
do_line(path, sub, xa, xb, ya+(yb-ya)*((double) i/n),
r_tool, overlap, res);
for (s = sub; *s; s++) {
sub2 = subordinates(paths, *s);
for (s2 = sub2; *s2; s2++)