87 lines
1.6 KiB
C
87 lines
1.6 KiB
C
|
/*
|
||
|
|
Copyright (C) 2016-2019 The University of Notre Dame
|
||
|
|
This software is distributed under the GNU General Public License.
|
||
|
|
See the file LICENSE for details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
A fun graphics demo that features a line segment bouncing around the screen.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "library/syscalls.h"
|
||
|
|
#include "library/stdio.h"
|
||
|
|
#include "library/string.h"
|
||
|
|
#include "library/nwindow.h"
|
||
|
|
|
||
|
|
typedef unsigned int uint32_t;
|
||
|
|
|
||
|
|
uint32_t randint(uint32_t min, uint32_t max);
|
||
|
|
void move(int *x, int *d, int min, int max);
|
||
|
|
|
||
|
|
struct nwindow *nw = 0;
|
||
|
|
|
||
|
|
int main(int argc, char *argv[])
|
||
|
|
{
|
||
|
|
int r = 255;
|
||
|
|
int g = 0;
|
||
|
|
int b = 0;
|
||
|
|
int x1 = 12;
|
||
|
|
int y1 = 12;
|
||
|
|
int x2 = 48;
|
||
|
|
int y2 = 48;
|
||
|
|
int dx1 = 4;
|
||
|
|
int dy1 = 1;
|
||
|
|
int dx2 = -2;
|
||
|
|
int dy2 = -2;
|
||
|
|
int dr = -1;
|
||
|
|
int dg = 2;
|
||
|
|
int db = 3;
|
||
|
|
|
||
|
|
nw = nw_create_default();
|
||
|
|
|
||
|
|
int width = nw_width(nw);
|
||
|
|
int height = nw_height(nw);
|
||
|
|
|
||
|
|
nw_clear(nw,0, 0, width, height);
|
||
|
|
nw_flush(nw);
|
||
|
|
|
||
|
|
while(nw_getchar(nw,0)!='q') {
|
||
|
|
move(&x1, &dx1, 0, width - 1);
|
||
|
|
move(&y1, &dy1, 0, height - 1);
|
||
|
|
move(&x2, &dx2, 0, width - 1);
|
||
|
|
move(&y2, &dy2, 0, height - 1);
|
||
|
|
move(&r, &dr, 0, 255);
|
||
|
|
move(&g, &dg, 0, 255);
|
||
|
|
move(&b, &db, 0, 255);
|
||
|
|
nw_fgcolor(nw,r, g, b);
|
||
|
|
nw_line(nw,x1, y1, x2 - x1, y2 - y1);
|
||
|
|
nw_flush(nw);
|
||
|
|
|
||
|
|
syscall_process_sleep(2);
|
||
|
|
}
|
||
|
|
nw_clear(nw,0, 0, width, height);
|
||
|
|
nw_fgcolor(nw,255, 255, 255);
|
||
|
|
nw_flush(nw);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint32_t randint(uint32_t min, uint32_t max)
|
||
|
|
{
|
||
|
|
static uint32_t state = 0xF3DC1A24;
|
||
|
|
state = (state * 1299721) + 29443;
|
||
|
|
return min + ((state >> 16) % (max - min + 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
void move(int *x, int *d, int min, int max)
|
||
|
|
{
|
||
|
|
*x += *d;
|
||
|
|
if(*x < min) {
|
||
|
|
*x = min;
|
||
|
|
*d = randint(1, 10);
|
||
|
|
}
|
||
|
|
if(*x > max) {
|
||
|
|
*x = max;
|
||
|
|
*d = -randint(1, 10);
|
||
|
|
}
|
||
|
|
}
|