1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
#include "web_svg.h"
#include "web_dom.h"
#include "board.h"
#include "comp.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <emscripten/emscripten.h>
#define NUM_SECTORS 20
#define SECTOR_WIDTH 18.0
#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"
static inline struct elem *svg_elem_init(char *name, int size_attrs)
{
return elem_init("http://www.w3.org/2000/svg", name, size_attrs);
}
// draws a ring if angles are equal
struct elem *gen_arc(double a1, double a2, double r1, double r2, char *col)
{
struct ccoords cc1 = pol_to_cart(
(struct pcoords){ .a = (a1 == a2 ? 1 : a2), .r = r1 });
struct ccoords cc2 = pol_to_cart(
(struct pcoords){ .a = (a1 == a2 ? 0 : a1), .r = r1 });
struct ccoords cc3 = pol_to_cart(
(struct pcoords){ .a = (a1 == a2 ? 0 : a1), .r = r2 });
struct ccoords cc4 = pol_to_cart(
(struct pcoords){ .a = (a1 == a2 ? 1 : a2), .r = r2 });
struct elem *e = svg_elem_init("path", 2);
elem_add_attr(e, "fill", col);
char buf[512];
int buflen = 0;
buflen += sprintf(buf + buflen, "M%f %f", cc1.x, cc1.y);
buflen += sprintf(buf + buflen, "A%f %f 0 0 0 %f %f",
r1, r1, cc2.x, cc2.y);
if (a1 == a2)
buflen += sprintf(buf + buflen, "A%f %f 0 1 0 %f %f",
r1, r1, cc1.x, cc1.y);
buflen += sprintf(buf + buflen, "L%f %f", cc3.x, cc3.y);
buflen += sprintf(buf + buflen, "A%f %f 0 0 1 %f %f",
r2, r2, cc4.x, cc4.y);
if (a1 == a2)
buflen += sprintf(buf + buflen, "A%f %f 0 1 1 %f %f",
r2, r2, cc3.x, cc3.y);
buf[buflen++] = 'Z';
buf[buflen++] = 0;
elem_add_attr(e, "d", buf);
return e;
}
struct 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);
}
struct elem *gen_ring(double r, double w, char *col)
{
return gen_arc(0, 0, r - w/2, r + w/2, col);
}
struct elem *gen_circle(double r, char *col)
{
struct elem *e = svg_elem_init("circle", 2);
elem_add_attr(e, "fill", col);
elem_add_attr_double(e, "r", r);
return e;
}
struct 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 elem *e = svg_elem_init("line", 6);
elem_add_attr(e, "stroke", col);
elem_add_attr_double(e, "x1", cc1.x);
elem_add_attr_double(e, "y1", cc1.y);
elem_add_attr_double(e, "x2", cc2.x);
elem_add_attr_double(e, "y2", cc2.y);
elem_add_attr_double(e, "stroke-width", w);
return e;
}
int draw_spider(int elemc, struct elem **elemv)
{
for (int i = 5; i > 1; --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[1],
OUTER_DISTS[5] + 10, WIRE_WIDTH, C_WIRE);
elemv[elemc++] = gen_line(a, OUTER_DISTS[1],
OUTER_DISTS[5] + 10, WIRE_WIDTH/2, C_WIRE_INNER);
}
for (int i = 1; i >= 0; --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;
}
int draw_numbers(int elemc, struct elem **elemv)
{
elemv[elemc++] = gen_ring(DIAMETER/2 - WIRE_WIDTH*4, WIRE_WIDTH,
"#ddd");
int r = DIAMETER/2 - 33/2;
for (int i = 0; i < 20; ++i) {
struct elem *e = elemv[elemc++] = svg_elem_init("text", 5);
elem_add_attr(e, "font-size", "33");
elem_add_attr(e, "fill", "#fff");
elem_add_attr(e, "text-anchor", "middle");
elem_add_attr(e, "dominant-baseline", "central");
char buf[512];
double a = 90 - i*SECTOR_WIDTH;
if (a < 0) a += 360;
struct ccoords cc = pol_to_cart(
(struct pcoords){ .a = a, .r = r });
sprintf(buf, "scale(1 -1) translate(%f %f) rotate(%f)",
cc.x, -cc.y, a <= 180 ? 90 -a : 270 -a);
elem_add_attr(e, "transform", buf);
e->content = malloc(3);
sprintf(e->content, "%d", SECTORS[i]);
}
return elemc;
}
void svg_draw_board()
{
struct elem **elemv = malloc(200 * sizeof(*elemv));
int elemc = 0;
elemv[elemc++] = gen_circle(DIAMETER/2, C_BLACK);
for (int i = 5; i > 1; --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[1], C_GREEN);
elemv[elemc++] = gen_circle(OUTER_DISTS[0], C_RED);
elemc = draw_spider(elemc, elemv);
elemc = draw_numbers(elemc, elemv);
append_elemv("#dartboard .base", elemc, elemv);
for (int i = 0; i < elemc; ++i)
elem_free(elemv[i]);
free(elemv);
}
void svg_draw_point(double x, double y)
{
struct elem *e = gen_circle(8, "#33f");
elem_add_attr(e, "stroke", "#ff0");
elem_add_attr(e, "stroke-width", "2");
elem_add_attr_double(e, "cx", x);
elem_add_attr_double(e, "cy", y);
append_elemv("#dartboard .overlay", 1, &e);
elem_free(e);
}
void svg_clear_points()
{
dom_elem_set_content("#dartboard .overlay", NULL);
}
|
