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#include "web_svg.h"
#include "web_dom.h"
#include "web_opts.h"
#include "board.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#define C_BLACK "#272b2c"
#define C_WHITE "#fbe3ba"
#define C_RED "#f6302f"
#define C_GREEN "#22912d"
#define C_WIRE "#909ca0"
#define C_WIRE_INNER "#d8e6ec"
#define C_NUMBER_RING "#ddd"
#define C_NUMBER "#fff"
#define C_POINT "#33f"
#define C_POINT_OUTLINE "#ff0"
#define POINT_RADIUS 6
static struct dom_elem *svg_elem_init(char *name, int size_attrs)
{
return dom_elem_init("http://www.w3.org/2000/svg", name, size_attrs);
}
static struct dom_elem *gen_circle(double r, char *col)
{
struct dom_elem *e = svg_elem_init("circle", 2);
dom_elem_add_attrd(e, "r", r);
dom_elem_add_attr(e, "fill", col);
return e;
}
// draws a ring if angles are equal
static struct dom_elem *gen_arc(double a1, double a2, double r1, double r2,
char *col)
{
bool ring = (a1 == a2);
if (ring) {
// these values are not significant. the ring is drawn as two
// consecutive arcs, so the path goes from one angle to the
// other and back to the first.
a1 = 0;
a2 = 1;
}
struct ccoords cc1 = pol_to_cart((struct pcoords){ .a = a2, .r = r1 });
struct ccoords cc2 = pol_to_cart((struct pcoords){ .a = a1, .r = r1 });
struct ccoords cc3 = pol_to_cart((struct pcoords){ .a = a1, .r = r2 });
struct ccoords cc4 = pol_to_cart((struct pcoords){ .a = a2, .r = r2 });
struct dom_elem *e = svg_elem_init("path", 2);
dom_elem_add_attr(e, "fill", col);
// (arc)
// M - move to inner start
// A - draw arc to inner end
// L - draw line to outer end
// A - draw arc to outer start
// Z - draw line to inner start
//
// (ring)
// M - move to inner 1
// A - draw arc to inner 2
// A - draw arc to inner 1
// Z - draw zero-length line to close path
// M - move to outer 2
// A - draw arc to outer 1
// A - draw arc to outer 2
// Z - draw zero-length line to close path
//
// for default `nonzero' fill-rule to work for rings, the inner and
// outer arcs must go in opposite directions
char buf[512];
int len = 0;
len += sprintf(buf + len, "M%f %fA%f %f 0 0 0 %f %fL",
cc1.x, cc1.y, r1, r1, cc2.x, cc2.y);
if (ring)
len += -1 + sprintf(buf + len - 1, "A%f %f 0 1 0 %f %fZM",
r1, r1, cc1.x, cc1.y);
len += sprintf(buf + len, "%f %fA%f %f 0 0 1 %f %fZ",
cc3.x, cc3.y, r2, r2, cc4.x, cc4.y);
if (ring)
sprintf(buf + len - 1, "A%f %f 0 1 1 %f %fZ",
r2, r2, cc3.x, cc3.y);
dom_elem_add_attr(e, "d", buf);
return e;
}
static struct dom_elem *gen_ring(double r, double w, char *col)
{
return gen_arc(0, 0, r - (w / 2), r + (w / 2), col);
}
static struct dom_elem *gen_segment(double a, double r1, double r2, char *col)
{
return gen_arc(a - (SECTOR_WIDTH / 2), a + (SECTOR_WIDTH / 2), r1, r2,
col);
}
static struct dom_elem *gen_line(double a, double r1, double r2, double w,
char *col)
{
struct ccoords cc1 = pol_to_cart((struct pcoords){ .a = a, .r = r1 });
struct ccoords cc2 = pol_to_cart((struct pcoords){ .a = a, .r = r2 });
struct dom_elem *e = svg_elem_init("line", 6);
dom_elem_add_attrd(e, "x1", cc1.x);
dom_elem_add_attrd(e, "y1", cc1.y);
dom_elem_add_attrd(e, "x2", cc2.x);
dom_elem_add_attrd(e, "y2", cc2.y);
dom_elem_add_attr(e, "stroke", col);
dom_elem_add_attrd(e, "stroke-width", w);
return e;
}
static int gen_segments(struct dom_elem **elemv)
{
int elemc = 0;
for (int i = R_DOUBLE; i > R_25; --i) {
for (int j = 0; j < NUM_SECTORS; ++j) {
double a = 90 - (j * SECTOR_WIDTH);
if (a < 0)
a += 360;
elemv[elemc++] = gen_segment(a, OUTER_DISTS[i - 1],
OUTER_DISTS[i],
i % 2 ? (j % 2 ? C_GREEN : C_RED) :
(j % 2 ? C_WHITE : C_BLACK));
}
}
elemv[elemc++] = gen_circle(OUTER_DISTS[R_25], C_GREEN);
elemv[elemc++] = gen_circle(OUTER_DISTS[R_BULL], C_RED);
return elemc;
}
static int gen_wires(struct dom_elem **elemv)
{
int elemc = 0;
for (int i = R_DOUBLE; i > R_25; --i) {
elemv[elemc++] = gen_ring(OUTER_DISTS[i], WIRE_WIDTH, C_WIRE);
elemv[elemc++] = gen_ring(OUTER_DISTS[i], WIRE_WIDTH / 2,
C_WIRE_INNER);
}
for (int i = 0; i < NUM_SECTORS; ++i) {
double a = 90 - (i * SECTOR_WIDTH) - (SECTOR_WIDTH / 2);
if (a < 0)
a += 360;
elemv[elemc++] = gen_line(a, OUTER_DISTS[R_25],
OUTER_DISTS[R_DOUBLE] + 10, WIRE_WIDTH, C_WIRE);
elemv[elemc++] = gen_line(a, OUTER_DISTS[R_25],
OUTER_DISTS[R_DOUBLE] + 10, WIRE_WIDTH / 2,
C_WIRE_INNER);
}
for (int i = R_25; i >= R_BULL; --i) {
elemv[elemc++] = gen_ring(OUTER_DISTS[i], WIRE_WIDTH, C_WIRE);
elemv[elemc++] = gen_ring(OUTER_DISTS[i], WIRE_WIDTH / 2,
C_WIRE_INNER);
}
return elemc;
}
static int gen_numbers(struct dom_elem **elemv)
{
int elemc = 0;
elemv[elemc++] = gen_ring((DIAMETER / 2) - (WIRE_WIDTH * 4),
WIRE_WIDTH, C_NUMBER_RING);
int r = (DIAMETER / 2) - (33 / 2);
for (int i = 0; i < NUM_SECTORS; ++i) {
struct dom_elem *e = svg_elem_init("text", 5);
elemv[elemc++] = e;
dom_elem_add_attr(e, "font-size", "33");
dom_elem_add_attr(e, "text-anchor", "middle");
dom_elem_add_attr(e, "dominant-baseline", "central");
dom_elem_add_attr(e, "fill", C_NUMBER);
double a = 90 - (i * SECTOR_WIDTH);
if (a < 0)
a += 360;
struct ccoords cc = pol_to_cart(
(struct pcoords){ .a = a, .r = r });
dom_elem_add_attrf(e, "transform",
"scale(1 -1) translate(%f %f) rotate(%f)",
cc.x, -cc.y, a <= 180 ? 90 - a : 270 - a);
asprintf(&e->content, "%d", SECTORS[i]);
}
return elemc;
}
static void draw_board()
{
struct dom_elem **elemv = malloc(200 * sizeof(*elemv));
int elemc = 0;
elemv[elemc++] = gen_circle(DIAMETER / 2, C_BLACK);
elemc += gen_segments(elemv + elemc);
elemc += gen_wires(elemv + elemc);
elemc += gen_numbers(elemv + elemc);
dom_append_elemv("#dartboard .base", elemc, elemv);
for (int i = 0; i < elemc; ++i)
dom_elem_free(elemv[i]);
free(elemv);
}
static void create_board()
{
struct dom_elem *e = svg_elem_init("svg", 2);
dom_elem_add_attr(e, "id", "dartboard");
dom_elem_add_attrf(e, "viewBox", "0 0 %f %f", DIAMETER, DIAMETER);
dom_append_elemv("#dartboard-container", 1, &e);
free(e);
struct dom_elem **elemv = malloc(2 * sizeof(*elemv));
int elemc = 0;
for (int i = 0; i < 2; ++i) {
struct dom_elem *e = svg_elem_init("g", 2);
dom_elem_add_attr(e, "class", i ? "overlay" : "base");
dom_elem_add_attrf(e, "transform",
"translate(%f %f) scale(1 -1)",
DIAMETER / 2, DIAMETER / 2);
elemv[elemc++] = e;
}
dom_append_elemv("#dartboard", elemc, elemv);
for (int i = 0; i < elemc; ++i)
dom_elem_free(elemv[i]);
free(elemv);
}
void svg_init()
{
create_board();
draw_board();
}
void svg_draw_point(double x, double y)
{
struct dom_elem *e = gen_circle(POINT_RADIUS, C_POINT);
dom_elem_add_attrd(e, "cx", x);
dom_elem_add_attrd(e, "cy", y);
dom_elem_add_attr(e, "stroke", C_POINT_OUTLINE);
dom_elem_add_attr(e, "stroke-width", "2");
if (delay_ms >= SVG_THROW_ANIM_MS)
dom_elem_add_attrf(e, "style", "animation: throw-anim %dms;",
SVG_THROW_ANIM_MS);
dom_append_elemv("#dartboard .overlay", 1, &e);
dom_elem_free(e);
}
void svg_clear_points()
{
dom_set_content("#dartboard .overlay", NULL);
}
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