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widecolor-demo: friendly snake 🐍 #110

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nick black 2019-12-05 01:16:02 -05:00
parent be6aa8a3fc
commit 6e73e3b72f
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1 changed files with 73 additions and 1 deletions
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74
src/demo/widecolor.c
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@ -4,8 +4,77 @@
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>
#include "demo.h"
static void *
snake_thread(void* vnc){
struct notcurses* nc = vnc;
struct ncplane* n = notcurses_stdplane(nc);
int dimy, dimx;
ncplane_dim_yx(n, &dimy, &dimx);
int x, y;
// start it in the lower center of the screen
x = (random() % (dimx / 2)) + (dimx / 4);
y = (random() % (dimy / 2)) + (dimy / 2);
cell head = CELL_TRIVIAL_INITIALIZER;
uint64_t channels = 0;
notcurses_fg_prep(&channels, 255, 255, 255);
cell_prime(n, &head, "🐍", 0, channels);
cell c = CELL_TRIVIAL_INITIALIZER;
cell_bg_default(&head);
while(true){
pthread_testcancel();
ncplane_cursor_move_yx(n, y, x);
ncplane_at_cursor(n, &c);
// FIXME should be a whole body
ncplane_putc(n, &head);
notcurses_render(nc);
ncplane_cursor_move_yx(n, y, x);
ncplane_putc(n, &c);
int oldy, oldx;
clock_nanosleep(CLOCK_MONOTONIC, 0, &demodelay, NULL);
do{ // force a move
oldy = y;
oldx = x;
int direction = random() % 4;
switch(direction){
case 0: --y; break;
case 1: ++x; break;
case 2: ++y; break;
case 3: --x; break;
}
// keep him away from the sides due to width irregularities
if(x < (dimx / 4)){
x = dimx / 4;
}else if(x >= dimx * 3 / 4){
x = dimx * 3 / 4;
}
if(y < 0){
y = 0;
}else if(y >= dimy){
y = dimy - 1;
}
ncplane_cursor_move_yx(n, y, x);
ncplane_at_cursor(n, &c);
// don't allow the snake into the summary zone (test for walls)
if(!cell_simple_p(&c)){ // any simple cell is fine to consume
const char* egc = cell_extended_gcluster(n, &c);
wchar_t w;
if(mbtowc(&w, egc, strlen(egc)) > 0){
if(w >= 0x2500 && w <= 0x257f){ // no room in the inn, little snake!
x = oldx;
y = oldy;
}
}
}
}while(oldx == x && oldy == y);
}
cell_release(n, &head); // FIXME won't be released when cancelled
cell_release(n, &c); // FIXME won't be released when cancelled
return NULL;
}
static int
message(struct ncplane* n, int maxy, int maxx, int num, int total,
int bytes_out, int egs_out, int cols_out){
@ -358,11 +427,14 @@ int widecolor_demo(struct notcurses* nc){
};
ncplane_fadein(n, &tv);
}
pthread_t tid;
pthread_create(&tid, NULL, snake_thread, nc);
int key;
do{
key = notcurses_getc_blocking(nc, &c, &special);
}while(key < 0);
// nanosleep(&demodelay, NULL);
pthread_cancel(tid);
pthread_join(tid, NULL);
}while(c.gcluster == 0 && special == NCKEY_RESIZE);
}
return 0;