rain.c

应用平台 SCO OpenServer 5 是一个模拟下雨的小玩意

/*
 * $Id: rain.c,v 1.15 2000/09/02 18:41:22 tom Exp $
 */
#include "test.priv.h"

#include <term.h>	/* for tparm() */

#include <signal.h>

/* rain 11/3/1980 EPS/CITHEP */

static float ranf(void);
static void onsig(int sig);

static int next_j(int j)
{
    if (j==0) j=4; else --j;
    if (has_colors()) {
	int z = (int)(3*ranf());
	chtype color = COLOR_PAIR(z);
	if (z)
	    color |= A_BOLD;
	attrset(color);
    }
    return j;
}

int
main(
	int argc GCC_UNUSED,
	char *argv[] GCC_UNUSED)
{
int x, y, j;
static int xpos[5], ypos[5];
float r;
float c;

    for (j=SIGHUP;j<=SIGTERM;j++)
	if (signal(j,SIG_IGN)!=SIG_IGN) signal(j,onsig);

    initscr();
    if (has_colors()) {
	int bg = COLOR_BLACK;
	start_color();
#if HAVE_USE_DEFAULT_COLORS
	if (use_default_colors() == OK)
		bg = -1;
#endif
	init_pair(1, COLOR_BLUE, bg);
	init_pair(2, COLOR_CYAN, bg);
    }
    nl();
    noecho();
    curs_set(0);
    timeout(0);

    r = (float)(LINES - 4);
    c = (float)(COLS - 4);
    for (j=5;--j>=0;) {
	xpos[j]=(int)(c* ranf())+2;
	ypos[j]=(int)(r* ranf())+2;
    }

    for (j=0;;) {
	x=(int)(c*ranf())+2;
	y=(int)(r*ranf())+2;

	mvaddch(y,x, '.');

	mvaddch(ypos[j], xpos[j], 'o');

	j = next_j(j);
	mvaddch(ypos[j], xpos[j], 'O');

	j = next_j(j);
	mvaddch( ypos[j]-1, xpos[j],    '-');
	mvaddstr(ypos[j],   xpos[j]-1, "|.|");
	mvaddch( ypos[j]+1, xpos[j],    '-');

	j = next_j(j);
	mvaddch( ypos[j]-2, xpos[j],     '-');
	mvaddstr(ypos[j]-1, xpos[j]-1,  "/ \\");
	mvaddstr(ypos[j],   xpos[j]-2,  "| O |");
	mvaddstr(ypos[j]+1, xpos[j]-1,  "\\ /");
	mvaddch( ypos[j]+2, xpos[j],     '-');

	j = next_j(j);
	mvaddch( ypos[j]-2, xpos[j],     ' ');
	mvaddstr(ypos[j]-1, xpos[j]-1,  "   ");
	mvaddstr(ypos[j],   xpos[j]-2, "     ");
	mvaddstr(ypos[j]+1, xpos[j]-1,  "   ");
	mvaddch( ypos[j]+2, xpos[j],     ' ');

	xpos[j] = x; ypos[j] = y;

	switch(getch())
	{
	case('q'):
	case('Q'):
	    curs_set(1);
	    endwin();
	    return(EXIT_SUCCESS);
	case 's':
	    nodelay(stdscr, FALSE);
	    break;
	case ' ':
	    nodelay(stdscr, TRUE);
	    break;
#ifdef KEY_RESIZE
	case(KEY_RESIZE):
	    r = (float)(LINES - 4);
	    c = (float)(COLS - 4);
	    break;
#endif
	}
	napms(50);
    }
}

static void
onsig(int n GCC_UNUSED)
{
    curs_set(1);
    endwin();
    exit(EXIT_FAILURE);
}

static float
ranf(void)
{
    long r = (rand() & 077777);
    return ((float) r / 32768.);
}