48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
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//#resource "astrocade.inc"
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#include "aclib.h"
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//#link "aclib.s"
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#include "acbios.h"
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#include "acextra.h"
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//#link "acextra.c"
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//#link "hdr_autostart.s"
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#include <stdlib.h>
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#include <string.h>
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void draw_line(int x0, int y0, int x1, int y1, byte color) {
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int dx = abs(x1-x0);
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int sx = x0<x1 ? 1 : -1;
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int dy = abs(y1-y0);
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int sy = y0<y1 ? 1 : -1;
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int err = (dx>dy ? dx : -dy)>>1;
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int e2;
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for(;;) {
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pixel(x0, y0, color, M_XOR);
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if (x0==x1 && y0==y1) break;
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e2 = err;
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if (e2 > -dx) { err -= dy; x0 += sx; }
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if (e2 < dy) { err += dx; y0 += sy; }
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}
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}
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/*{pal:"astrocade",layout:"astrocade"}*/
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const byte palette[8] = {
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0x06, 0x62, 0xF1, 0x04,
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0x07, 0xD4, 0x35, 0x00,
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};
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void main() {
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set_palette(palette);
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SYS_SETOUT(89*2, 20, 0);
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SYS_FILL(0x4000, 89*40, 0);
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hw_xpand = XPAND_COLORS(0, 2);
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draw_string(2, 80, 0, "Hello, Lines!");
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draw_line(0, 0, 159, 95, 1);
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// infinite loop
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srand(1);
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while(1) {
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draw_line(rand()%159, rand()%79, rand()%159, rand()%79, rand()&3);
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}
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}
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