mirror of
https://github.com/rricharz/Tek4010.git
synced 2026-02-06 00:24:48 +00:00
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
#define MAXX 1024
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#define MAXY 680
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#include <stdio.h>
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#include <math.h>
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int xs,ys;
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void startDraw(int x1,int y1)
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{
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if (x1 < 0) x1 = 0;
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if (x1 >= MAXX) x1 = MAXX -1;
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if (y1 < 0) y1 = 0;
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if (y1 >= MAXY) y1 = MAXY - 1;
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putchar(29);
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putchar((y1 >> 5) + 32);
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putchar((y1 & 31) + 96);
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putchar((x1 >> 5) + 32);
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putchar((x1 & 31) + 64);
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xs = x1;
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ys = y1;
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}
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void draw(int x2,int y2)
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{
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int hxchange, lychange;
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if (x2 < 0) x2 = 0;
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if (x2 >= MAXX) x2 = MAXX -1;
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if (y2 < 0) y2 = 0;
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if (y2 >= MAXY) y2 = MAXY - 1;
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if ((y2 >> 5) != (ys >> 5)) /* if high y has changed */
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putchar((y2 >> 5) + 32);
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hxchange = (x2 >> 5) != (xs >> 5);
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lychange = (y2 & 31) != (ys & 31);
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if (hxchange || lychange) putchar((y2 & 31) + 96);
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if (hxchange) /* if high order x has changed */
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putchar((x2 >> 5) + 32);
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putchar((x2 & 31) + 64);
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xs = x2;
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ys = y2;
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}
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void endDraw()
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{
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putchar(31);
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fflush(stdout);
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}
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int drawCircle(int x,int y,int r)
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{
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int i;
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double arg;
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startDraw(x + r, y);
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for (i = 0; i <= r; i++) {
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arg = (double)(i) * 6.283185307 / (double) r;
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draw(x + (int)((double)r * cos(arg)), y + (int)((double)r * sin(arg)));
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}
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endDraw();
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}
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int main (int argc, char *argv[])
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{
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drawCircle(512, 340, 200);
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drawCircle(612, 340, 100);
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drawCircle(412, 340, 100);
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drawCircle(512, 240, 100);
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drawCircle(512, 440, 100);
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startDraw(212,340); draw(812,340); endDraw();
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startDraw(512,040); draw(512,640); endDraw();
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startDraw(1,1); endDraw(); // move the cursor out of the way
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}
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