diff options
author | Bdale Garbee <bdale@gag.com> | 2012-09-12 20:01:22 -0600 |
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committer | Bdale Garbee <bdale@gag.com> | 2012-09-12 20:01:22 -0600 |
commit | 3b612efcd1dddc6a3d59012f7ed57754b1f798c2 (patch) | |
tree | 18d50713491ef96c5c127a309f870efb6c33f98d /ao-tools/lib/cc-integrate.c | |
parent | e076773c1693e2a62bb828dee71c04c20dbab0a5 (diff) | |
parent | 01eb36408d7e0e826b431fcc1d3b2deb23607e0b (diff) |
Merge branch 'new-debian' into debian
Conflicts:
ChangeLog
debian/altos.install
debian/changelog
debian/control
debian/copyright
debian/dirs
debian/docs
debian/menu
debian/rules
src/Makefile
Diffstat (limited to 'ao-tools/lib/cc-integrate.c')
-rw-r--r-- | ao-tools/lib/cc-integrate.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/ao-tools/lib/cc-integrate.c b/ao-tools/lib/cc-integrate.c new file mode 100644 index 00000000..ba50761b --- /dev/null +++ b/ao-tools/lib/cc-integrate.c @@ -0,0 +1,81 @@ +/* + * Copyright © 2009 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; version 2 of the License. + * + * 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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ + +#include "cc.h" +#include <stdlib.h> + +struct cc_timedata * +cc_timedata_convert(struct cc_timedata *d, double (*f)(double v, double a), double a) +{ + struct cc_timedata *r; + int n; + + r = calloc (1, sizeof (struct cc_timedata)); + r->num = d->num; + r->size = d->num; + r->data = calloc (r->size, sizeof (struct cc_timedataelt)); + r->time_offset = d->time_offset; + for (n = 0; n < d->num; n++) { + r->data[n].time = d->data[n].time; + r->data[n].value = f(d->data[n].value, a); + } + return r; +} + +struct cc_timedata * +cc_timedata_integrate(struct cc_timedata *d, double min_time, double max_time) +{ + struct cc_timedata *i; + int n, m; + int start, stop; + + cc_timedata_limits(d, min_time, max_time, &start, &stop); + i = calloc (1, sizeof (struct cc_timedata)); + i->num = stop - start + 1; + i->size = i->num; + i->data = calloc (i->size, sizeof (struct cc_timedataelt)); + i->time_offset = d->data[start].time; + for (n = 0; n < i->num; n++) { + m = n + start; + i->data[n].time = d->data[m].time; + if (n == 0) { + i->data[n].value = 0; + } else { + i->data[n].value = i->data[n-1].value + + (d->data[m].value + d->data[m-1].value) / 2 * + ((d->data[m].time - d->data[m-1].time) / 100.0); + } + } + return i; +} + +struct cc_perioddata * +cc_perioddata_differentiate(struct cc_perioddata *i) +{ + struct cc_perioddata *d; + int n; + + d = calloc (1, sizeof (struct cc_perioddata)); + d->num = i->num; + d->start = i->start; + d->step = i->step; + d->data = calloc (d->num, sizeof(double)); + for (n = 1; n < d->num; n++) + d->data[n] = (i->data[n] - i->data[n-1]) / (i->step / 100.0); + d->data[0] = d->data[1]; + return d; +} |