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/*
* meas.h - Measurements
*
* Written 2009, 2010 by Werner Almesberger
* Copyright 2009, 2010 by 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
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef MEAS_H
#define MEAS_H
#include "coord.h"
#include "expr.h"
#include "bitset.h"
typedef int (*lt_op_type)(struct coord a, struct coord b);
struct vec;
struct obj;
struct frame_qual {
const struct frame *frame;
struct frame_qual *next;
};
struct meas {
enum meas_type {
mt_xy_next,
mt_x_next,
mt_y_next,
mt_xy_max,
mt_x_max,
mt_y_max,
mt_n
} type;
char *label; /* or NULL */
int inverted;
/* low is obj->base */
struct vec *high;
struct expr *offset;
/* frame qualifiers */
struct frame_qual *low_qual;
struct frame_qual *high_qual;
};
struct sample {
struct coord pos;
struct bitset *frame_set;
struct sample *next;
};
extern int n_samples;
int lt_x(struct coord a, struct coord b);
int lt_y(struct coord a, struct coord b);
int lt_xy(struct coord a, struct coord b);
const struct sample *meas_find_min(lt_op_type lt, const struct sample *s,
const struct bitset *qual);
const struct sample *meas_find_next(lt_op_type lt, const struct sample *s,
struct coord ref, const struct bitset *qual);
const struct sample *meas_find_max(lt_op_type lt, const struct sample *s,
const struct bitset *qual);
void reset_samples(struct sample **samples, int n);
void meas_start(void);
void meas_post(const struct vec *vec, struct coord pos,
const struct bitset *frame_set);
int instantiate_meas(int n_frames);
#endif /* !MEAS_H */
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