80 lines
1.5 KiB
C
80 lines
1.5 KiB
C
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/*
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Copyright (C) 2016-2019 The University of Notre Dame
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This software is distributed under the GNU General Public License.
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See the file LICENSE for details.
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*/
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/*
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A fun graphics demo that features text bouncing around the screen.
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*/
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#include "library/syscalls.h"
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#include "library/stdio.h"
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#include "library/string.h"
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#include "library/nwindow.h"
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typedef unsigned int uint32_t;
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uint32_t randint(uint32_t min, uint32_t max);
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void move(int *x, int *d, int min, int max);
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int main(int argc, char *argv[])
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{
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int r = 255;
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int g = 0;
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int b = 0;
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int x1 = 12;
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int y1 = 12;
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int dx1 = 4;
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int dy1 = 1;
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int dr = -1;
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int dg = 2;
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int db = 3;
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struct nwindow *nw = nw_create_default();
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int width = nw_width(nw);
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int height = nw_height(nw);
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nw_clear(nw,0, 0, width, height);
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nw_flush(nw);
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while(nw_getchar(nw,0)!='q') {
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move(&x1, &dx1, 0, width - 80);
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move(&y1, &dy1, 0, height - 1);
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move(&r, &dr, 0, 255);
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move(&g, &dg, 0, 255);
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move(&b, &db, 0, 255);
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nw_fgcolor(nw,r, g, b);
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nw_string(nw,x1, y1, "basekernel");
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nw_flush(nw);
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syscall_process_sleep(75);
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}
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nw_clear(nw,0, 0, width, height);
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nw_fgcolor(nw,255, 255, 255);
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nw_flush(nw);
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return 0;
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}
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uint32_t randint(uint32_t min, uint32_t max)
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{
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static uint32_t state = 0xF3DC1A24;
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state = (state * 1299721) + 29443;
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return min + ((state >> 16) % (max - min + 1));
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}
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void move(int *x, int *d, int min, int max)
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{
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*x += *d;
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if(*x < min) {
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*x = min;
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*d = randint(1, 10);
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}
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if(*x > max) {
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*x = max;
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*d = -randint(1, 10);
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}
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}
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