-
Notifications
You must be signed in to change notification settings - Fork 0
/
xstars.c
97 lines (82 loc) · 2.54 KB
/
xstars.c
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
/*
* Copyright 2016 Philip J Freeman <elektron@halo.nu>
*
* This file is part of stars.
*
* stars 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 3 of the License, or
* (at your option) any later version.
*
* stars is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with stars. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <X11/Xlib.h>
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include "starslib.h"
#define Z_START 1024
#define U_SLEEP 25000
#define SPAWN_PERCENT 25
#define POSSIBLE_SPAWNS 1
int main()
{
// Open the display
Display *dpy = XOpenDisplay(NULL);
assert(dpy);
// Get the root window and attributes
Window w = DefaultRootWindow(dpy);
XWindowAttributes w_attr;
assert(XGetWindowAttributes(dpy, w, &w_attr));
// Create a "Graphics Context"
Colormap colormap;
colormap = DefaultColormap(dpy, DefaultScreen(dpy));
GC gc[OPACITY_MAX+1];
XColor screen_color[OPACITY_MAX+1];
XColor exact_color[OPACITY_MAX+1];
#define MAX_COLOR_NAME_SIZE 256
char *color_name[OPACITY_MAX+1];
for (int i=0; i <= OPACITY_MAX; i++) {
color_name[i] = malloc(MAX_COLOR_NAME_SIZE+1);
snprintf( color_name[i], MAX_COLOR_NAME_SIZE,
"rgb:%02x/%02x/%02x",
255*(i)/OPACITY_MAX,
255*(i)/OPACITY_MAX,
255*(i)/OPACITY_MAX
);
#ifdef DEBUG
printf("Setup Color %i: %s\n", i, color_name[i]);
#endif
assert( XAllocNamedColor(dpy, colormap, color_name[i], &screen_color[i], &exact_color[i] ) );
gc[i] = XCreateGC(dpy, w, 0, NULL);
XSetForeground(dpy, gc[i], screen_color[i].pixel);
}
// Initialize the stars lib
struct universe* u;
new_universe( &u, w_attr.width, w_attr.height, Z_START );
FRAME:
XClearArea( dpy, w, 0, 0, w_attr.width, w_attr.height, 0 );
for (;;) {
struct return_point rp;
int return_code = process_point( u, &rp );
if (return_code == 0) { break; }
if (return_code == 1) {
XDrawPoint( dpy, w, gc[rp.opacity], rp.x + (w_attr.width/2), rp.y + (w_attr.height/2));
}
}
XFlush(dpy);
if( rand()%100 < SPAWN_PERCENT ){
for ( int c=0; c < (rand()%POSSIBLE_SPAWNS)+1; c++ ){ new_point( u ); }
}
usleep(U_SLEEP);
goto FRAME;
return 0;
}