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#include <math.h>
#include <ncurses.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define HORIZONTAL_STDEV 50
#define VERTICAL_STDEV 50
// board spec from WDF rules
#define WIRE_WIDTH 1.56
#define INNER_DIAMETER_BULL 12.7
#define INNER_DIAMETER_25 31.8
#define DOUBLE_OUTER_EDGE 170.0
#define TREBLE_OUTER_EDGE 107.4
#define DOUBLE_INSIDE_WIDTH 8.0
#define TREBLE_INSIDE_WIDTH 8.0
#define SEGMENT_MAX_LEN 5
// distance from centre to apex of outer wire
// must be ordered outwards from centre
#define FOREACH_RING(M) \
M(BULL, INNER_DIAMETER_BULL/2 + WIRE_WIDTH/2) \
M(25, INNER_DIAMETER_25/2 + WIRE_WIDTH/2) \
M(SMALL, TREBLE_OUTER_EDGE - WIRE_WIDTH - TREBLE_INSIDE_WIDTH - \
WIRE_WIDTH/2) \
M(TREBLE, TREBLE_OUTER_EDGE - WIRE_WIDTH/2) \
M(BIG, DOUBLE_OUTER_EDGE - WIRE_WIDTH - DOUBLE_INSIDE_WIDTH - \
WIRE_WIDTH/2) \
M(DOUBLE, DOUBLE_OUTER_EDGE - WIRE_WIDTH/2)
#define GEN_RING_ENUM(X, D) R_ ## X,
#define GEN_RING_STRING(X, D) #X,
#define GEN_RING_OUTER_DIST(X, D) D,
int sectors[] = { 20, 1, 18, 4, 13, 6, 10, 15, 2, 17, 3, 19, 7,
16, 8, 11, 14, 9, 12, 5 };
enum ring {
FOREACH_RING(GEN_RING_ENUM)
R_OUT
};
char *RING_NAMES[] = {
FOREACH_RING(GEN_RING_STRING)
"OUT"
};
double OUTER_DISTS[] = {
FOREACH_RING(GEN_RING_OUTER_DIST)
};
double CENTRE_DISTS[sizeof(OUTER_DISTS)/sizeof(*OUTER_DISTS)];
void init_centre_dists()
{
CENTRE_DISTS[0] = 0;
for (int i = R_25; i < R_OUT; ++i)
CENTRE_DISTS[i] = (OUTER_DISTS[i] -
((OUTER_DISTS[i] - OUTER_DISTS[i-1]) / 2));
}
struct ccoords {
double x, y;
};
struct pcoords {
double a, r;
};
struct segment {
enum ring ring;
int sector;
};
int get_sector(double angle)
{
//return sectors[(int)(fmod(angle + 279, 360) / 18)];
double shifted = angle + 279;
return sectors[(int)((shifted - (360 * floor(shifted / 360))) / 18)];
}
enum ring get_ring(double radius)
{
for (int i = R_BULL; i < R_OUT; ++i)
if (radius < OUTER_DISTS[i])
return i;
return R_OUT;
}
double drand()
{
return (double)rand() / RAND_MAX;
}
double gauss(double mean, double stdev)
{
static bool have_next;
static double next;
double curr;
if (have_next) {
curr = next;
} else {
double theta = 2 * M_PI * drand();
double r = sqrt(-2 * log(1 - drand()));
curr = r * cos(theta);
next = r * sin(theta);
}
have_next = !have_next;
return mean + (curr * stdev);
}
struct ccoords get_offset()
{
return (struct ccoords){ .x = gauss(0, HORIZONTAL_STDEV),
.y = gauss(0, VERTICAL_STDEV) };
}
struct ccoords pol_to_cart(struct pcoords c)
{
double t = c.a * (M_PI / 180);
double x = c.r * cos(t);
double y = c.r * sin(t);
return (struct ccoords){ .x = x, .y = y };
}
struct pcoords cart_to_pol(struct ccoords c)
{
double a = atan2(c.y, c.x) * (180 / M_PI);
double r = sqrt(pow(c.x, 2) + pow(c.y, 2));
return (struct pcoords){ .a = a, .r = r };
}
struct pcoords throw_dart(struct pcoords target)
{
struct ccoords cc = pol_to_cart(target);
struct ccoords offset = get_offset();
return cart_to_pol((struct ccoords){ .x = cc.x + offset.x,
.y = cc.y + offset.y });
}
struct segment get_segment(struct pcoords c)
{
return (struct segment){ .sector = get_sector(c.a),
.ring = get_ring(c.r) };
}
char *segment_name(struct segment seg)
{
char *str = malloc(SEGMENT_MAX_LEN);
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wstringop-truncation"
if (seg.ring == R_BULL || seg.ring == R_25 || seg.ring == R_OUT)
strncpy(str, RING_NAMES[seg.ring], SEGMENT_MAX_LEN);
else
snprintf(str, SEGMENT_MAX_LEN,
(seg.ring == R_TREBLE ? "T%d" :
(seg.ring == R_DOUBLE ? "D%d" : "%d")),
seg.sector);
#pragma GCC diagnostic pop
return str;
}
int main()
{
/*
initscr();
addstr("test");
refresh();
getch();
endwin();
*/
srand(time(NULL));
init_centre_dists();
struct pcoords t = { .a = 90, .r = 100 };
struct pcoords res = throw_dart(t);
struct segment seg = get_segment(res);
for (int i = 0; i < 20; ++i) {
res = throw_dart(t);
seg = get_segment(res);
char *name = segment_name(seg);
printf("%d %f %f %d %s %s\n", seg.sector, res.a, res.r, seg.ring,
RING_NAMES[seg.ring], name);
free(name);
}
/*
printf("\n");
for (int i = 0; i < 6; i++) {
printf("%.2f\n%.2f\n\n", CENTRE_DISTS[i], OUTER_DISTS[i]);
}
*/
return 0;
}
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