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September 2017 Update

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Ingy döt Net 2017-09-23 10:01:46 +02:00
parent bba7bfd280
commit ba8067c3b7
14570 changed files with 153136 additions and 63871 deletions
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52
Task/Bitmap-Midpoint-circle-algorithm/PL-I/bitmap-midpoint-circle-algorithm-1.pli
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/* Plot three circles. */
CIRCLE: PROCEDURE OPTIONS (MAIN);
declare image (-20:20, -20:20) character (1);
declare j fixed binary;
image = '.';
image(0,*) = '-';
image(*,0) = '|';
image(0,0) = '+';
CALL DRAW_CIRCLE (0, 0, 11);
CALL DRAW_CIRCLE (0, 0, 8);
CALL DRAW_CIRCLE (0, 0, 19);
do j = hbound(image,1) to lbound(image,1) by -1;
put skip edit (image(j,*)) (a(1));
end;
draw_circle: procedure (x0, y0, radius); /* 14 May 2010. */
declare ( x0, y0, radius ) fixed binary;
declare ( ddfx, ddfy, x, y, f ) fixed binary;
declare debug bit (1) aligned static initial ('0'b);
f = 1-radius;
ddfx = 1;
ddfy = -2*radius;
x = 0;
y = radius;
image(x0, y0+radius) = '*'; /* Octet 0. */
image(x0+radius, y0) = '*'; /* Octet 1. */
image(x0, y0-radius) = '*'; /* Octet 2. */
image(x0-radius, y0) = '*'; /* Octet 3. */
do while (x < y);
if f >= 0 then
do; y = y - 1; ddfy = ddfy +2; f = f + ddfy; end;
x = x + 1;
ddfx = ddfx + 2;
f = f + ddfx;
image(x0+x, y0+y) = '0'; /* Draws octant 0. */
image(x0+y, y0+x) = '1'; /* Draws octant 1. */
image(x0+y, y0-x) = '2'; /* Draws octant 2. */
image(x0+x, y0-y) = '3'; /* Draws octant 3. */
image(x0-x, y0-y) = '4'; /* Draws octant 4. */
image(x0-y, y0-x) = '5'; /* Draws octant 5. */
image(x0-y, y0+x) = '6'; /* Draws octant 6. */
image(x0-x, y0+y) = '7'; /* Draws octant 7. */
end;
end draw_circle;
END CIRCLE;

41
Task/Bitmap-Midpoint-circle-algorithm/PL-I/bitmap-midpoint-circle-algorithm-2.pli
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....................|....................
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