#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
+#include <string.h>
#include <time.h>
#include "dive.h"
double scalex, scaley;
};
+/* Plot info with smoothing and one-, two- and three-minute minimums and maximums */
+struct plot_info {
+ int nr;
+ int maxtime;
+ struct plot_data {
+ int sec;
+ int val;
+ int smoothed;
+ int min[3];
+ int max[3];
+ int avg[3];
+ } entry[];
+};
+#define plot_info_size(nr) (sizeof(struct plot_info) + (nr)*sizeof(struct plot_data))
+
/* Scale to 0,0 -> maxx,maxy */
#define SCALE(gc,x,y) (x)*gc->maxx/gc->scalex,(y)*gc->maxy/gc->scaley
}
typedef struct {
+ int size;
double r,g,b;
- enum {CENTER,LEFT} allign;
+ enum {CENTER,LEFT} halign;
+ enum {MIDDLE,TOP,BOTTOM} valign;
} text_render_options_t;
-static void plot_text(struct graphics_context *gc, text_render_options_t *tro,
+static void plot_text(struct graphics_context *gc, const text_render_options_t *tro,
double x, double y, const char *fmt, ...)
{
cairo_t *cr = gc->cr;
vsnprintf(buffer, sizeof(buffer), fmt, args);
va_end(args);
+ cairo_set_font_size(cr, tro->size);
cairo_text_extents(cr, buffer, &extents);
dx = 0;
- if (tro->allign == CENTER)
+ switch (tro->halign) {
+ case CENTER:
dx = -(extents.width/2 + extents.x_bearing);
- dy = extents.height * 1.2;
+ break;
+ case LEFT:
+ dx = 0;
+ break;
+ }
+ switch (tro->valign) {
+ case TOP:
+ dy = extents.height * 1.2;
+ break;
+ case BOTTOM:
+ dy = -extents.height * 0.8;
+ break;
+ case MIDDLE:
+ dy = 0;
+ break;
+ }
move_to(gc, x, y);
cairo_rel_move_to(cr, dx, dy);
cairo_show_text(cr, buffer);
}
+static void render_depth_sample(struct graphics_context *gc, struct sample *sample, const text_render_options_t *tro)
+{
+ int sec = sample->time.seconds;
+ depth_t depth = sample->depth;
+ const char *fmt;
+ double d;
+
+ switch (output_units.length) {
+ case METERS:
+ d = depth.mm / 1000.0;
+ fmt = "%.1f";
+ break;
+ case FEET:
+ d = to_feet(depth);
+ fmt = "%.0f";
+ break;
+ }
+ plot_text(gc, tro, sec, depth.mm, fmt, d);
+}
+
/*
* Find the next minimum/maximum point.
*
result = NULL;
for (;;) {
- int time, depth;
+ int depth;
sample++;
if (sample >= end)
return NULL;
- time = sample->time.seconds;
depth = sample->depth.mm;
if (minmax) {
return result;
}
-static void render_depth_sample(struct graphics_context *gc, struct sample *sample)
-{
- text_render_options_t tro = {1.0, 0.2, 0.2, CENTER};
- int sec = sample->time.seconds;
- depth_t depth = sample->depth;
- const char *fmt;
- double d;
-
- switch (output_units.length) {
- case METERS:
- d = depth.mm / 1000.0;
- fmt = "%.1f";
- break;
- case FEET:
- d = to_feet(depth);
- fmt = "%.0f";
- break;
- }
- plot_text(gc, &tro, sec, depth.mm, fmt, d);
-}
-
static void plot_text_samples(struct graphics_context *gc, struct sample *a, struct sample *b)
{
+ static const text_render_options_t deep = {14, 1.0, 0.2, 0.2, CENTER, TOP};
+ static const text_render_options_t shallow = {14, 1.0, 0.2, 0.2, CENTER, BOTTOM};
+
for (;;) {
if (b <= a)
break;
a = next_minmax(a, b, 1);
if (!a)
- return;
- render_depth_sample(gc, a);
+ break;
+ render_depth_sample(gc, a, &deep);
a = next_minmax(a, b, 0);
if (!a)
break;
+ if (a->depth.mm < 2500)
+ continue;
+ render_depth_sample(gc, a, &shallow);
}
}
gc->scalex = maxtime;
gc->scaley = maxdepth;
- cairo_set_font_size(gc->cr, 14);
-
sample = dive->sample;
end = dive->sample + dive->samples;
plot_text_samples(gc, sample, end);
}
-static void plot_depth_profile(struct dive *dive, struct graphics_context *gc)
+static void plot_smoothed_profile(struct graphics_context *gc, struct plot_info *pi)
+{
+ int i;
+ struct plot_data *entry = pi->entry;
+
+ cairo_set_source_rgba(gc->cr, 1, 0.2, 0.2, 0.20);
+ move_to(gc, entry->sec, entry->smoothed);
+ for (i = 1; i < pi->nr; i++) {
+ entry++;
+ line_to(gc, entry->sec, entry->smoothed);
+ }
+ cairo_stroke(gc->cr);
+}
+
+static void plot_minmax_profile_minute(struct graphics_context *gc, struct plot_info *pi,
+ int index, double a)
+{
+ int i;
+ struct plot_data *entry = pi->entry;
+
+ cairo_set_source_rgba(gc->cr, 1, 0.2, 1, a);
+ move_to(gc, entry->sec, entry->min[index]);
+ for (i = 1; i < pi->nr; i++) {
+ entry++;
+ line_to(gc, entry->sec, entry->min[index]);
+ }
+ for (i = 1; i < pi->nr; i++) {
+ line_to(gc, entry->sec, entry->max[index]);
+ entry--;
+ }
+ cairo_close_path(gc->cr);
+ cairo_fill(gc->cr);
+}
+
+static void plot_minmax_profile(struct graphics_context *gc, struct plot_info *pi)
+{
+ plot_minmax_profile_minute(gc, pi, 2, 0.1);
+ plot_minmax_profile_minute(gc, pi, 1, 0.1);
+ plot_minmax_profile_minute(gc, pi, 0, 0.1);
+}
+
+static void plot_depth_profile(struct dive *dive, struct graphics_context *gc, struct plot_info *pi)
{
+ int i;
cairo_t *cr = gc->cr;
int begins, sec, depth;
- int i, samples;
- struct sample *sample;
+ struct plot_data *entry;
int maxtime, maxdepth, marker;
- samples = dive->samples;
- if (!samples)
- return;
-
cairo_set_line_width(gc->cr, 2);
/* Get plot scaling limits */
gc->scalex = maxtime;
- sample = dive->sample;
+ plot_smoothed_profile(gc, pi);
+ plot_minmax_profile(gc, pi);
+
+ entry = pi->entry;
cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.80);
- begins = sample->time.seconds;
- move_to(gc, sample->time.seconds, sample->depth.mm);
- for (i = 1; i < dive->samples; i++) {
- sample++;
- sec = sample->time.seconds;
+ begins = entry->sec;
+ move_to(gc, entry->sec, entry->val);
+ for (i = 1; i < pi->nr; i++) {
+ entry++;
+ sec = entry->sec;
if (sec <= maxtime) {
- depth = sample->depth.mm;
+ depth = entry->val;
line_to(gc, sec, depth);
}
}
static void plot_info(struct dive *dive, struct graphics_context *gc)
{
- text_render_options_t tro = {0.2, 1.0, 0.2, LEFT};
+ text_render_options_t tro = {10, 0.2, 1.0, 0.2, LEFT, TOP};
const double liters_per_cuft = 28.317;
const char *unit;
double airuse;
{
pressure_t startp, endp;
- cairo_set_font_size(gc->cr, 10);
-
if (get_cylinder_pressure_range(dive, gc, &startp, &endp)) {
int start, end;
const char *unit = "bar";
break;
}
- text_render_options_t tro = {0.2, 1.0, 0.2, LEFT};
+ text_render_options_t tro = {10, 0.2, 1.0, 0.2, LEFT, TOP};
plot_text(gc, &tro, 0, startp.mbar, "%d %s", start, unit);
plot_text(gc, &tro, dive->duration.seconds, endp.mbar,
"%d %s", end, unit);
}
}
+static void analyze_plot_info_minmax_minute(struct plot_data *entry, struct plot_data *first, struct plot_data *last, int index)
+{
+ struct plot_data *p = entry;
+ int time = entry->sec;
+ int seconds = 60*(index+1);
+ int min, max, avg, nr;
+
+ /* Go back 'seconds' in time */
+ while (p > first) {
+ if (p[-1].sec < time - seconds)
+ break;
+ p--;
+ }
+
+ /* Then go forward until we hit an entry past the time */
+ min = max = avg = p->val;
+ nr = 1;
+ while (++p < last) {
+ int val = p->val;
+ if (p->sec > time + seconds)
+ break;
+ avg += val;
+ nr ++;
+ if (val < min)
+ min = val;
+ if (val > max)
+ max = val;
+ }
+ entry->min[index] = min;
+ entry->max[index] = max;
+ entry->avg[index] = (avg + nr/2) / nr;
+}
+
+static void analyze_plot_info_minmax(struct plot_data *entry, struct plot_data *first, struct plot_data *last)
+{
+ analyze_plot_info_minmax_minute(entry, first, last, 0);
+ analyze_plot_info_minmax_minute(entry, first, last, 1);
+ analyze_plot_info_minmax_minute(entry, first, last, 2);
+}
+
+static struct plot_info *analyze_plot_info(struct plot_info *pi)
+{
+ int i;
+ int nr = pi->nr;
+
+ /* Smoothing function: 5-point triangular smooth */
+ for (i = 2; i < nr-2; i++) {
+ struct plot_data *entry = pi->entry+i;
+ int val;
+
+ val = entry[-2].val + 2*entry[-1].val + 3*entry[0].val + 2*entry[1].val + entry[2].val;
+ entry->smoothed = (val+4) / 9;
+ }
+
+ /* One-, two- and three-minute minmax data */
+ for (i = 0; i < nr; i++) {
+ struct plot_data *entry = pi->entry +i;
+ analyze_plot_info_minmax(entry, pi->entry, pi->entry+nr);
+ }
+
+ return pi;
+}
+
+/*
+ * Create a plot-info with smoothing and ranged min/max
+ *
+ * This also makes sure that we have extra empty events on both
+ * sides, so that you can do end-points without having to worry
+ * about it.
+ */
+static struct plot_info *depth_plot_info(struct dive *dive)
+{
+ int i, nr = dive->samples + 4, sec;
+ size_t alloc_size = plot_info_size(nr);
+ struct plot_info *pi;
+
+ pi = malloc(alloc_size);
+ if (!pi)
+ return pi;
+ memset(pi, 0, alloc_size);
+ pi->nr = nr;
+ sec = 0;
+ for (i = 0; i < dive->samples; i++) {
+ struct sample *sample = dive->sample+i;
+ struct plot_data *entry = pi->entry + i + 2;
+
+ sec = entry->sec = sample->time.seconds;
+ entry->val = sample->depth.mm;
+ }
+ /* Fill in the last two entries with empty values but valid times */
+ i = dive->samples + 2;
+ pi->entry[i].sec = sec + 20;
+ pi->entry[i+1].sec = sec + 40;
+
+ return analyze_plot_info(pi);
+}
+
static void plot(struct graphics_context *gc, int w, int h, struct dive *dive)
{
double topx, topy;
+ struct plot_info *pi = depth_plot_info(dive);
topx = w / 20.0;
topy = h / 20.0;
plot_cylinder_pressure(dive, gc);
/* Depth profile */
- plot_depth_profile(dive, gc);
+ plot_depth_profile(dive, gc, pi);
/* Text on top of all graphs.. */
plot_depth_text(dive, gc);
projects / ext / subsurface.git / blobdiff