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CDE

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Ingy döt Net 2013-04-10 16:57:12 -07:00
parent 518da4a923
commit 764da6cbbb
6144 changed files with 83610 additions and 11 deletions
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29
Task/Bitmap-Midpoint-circle-algorithm/Common-Lisp/bitmap-midpoint-circle-algorithm-1.lisp Normal file
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(defun draw-circle (draw-function x0 y0 radius)
(labels ((foo (x y)
(funcall draw-function x y))
(put (x y m)
(let ((x+ (+ x0 x))
(x- (- x0 x))
(y+ (+ y0 y))
(y- (- y0 y))
(x0y+ (+ x0 y))
(x0y- (- x0 y))
(xy0+ (+ y0 x))
(xy0- (- y0 x)))
(foo x+ y+)
(foo x+ y-)
(foo x- y+)
(foo x- y-)
(foo x0y+ xy0+)
(foo x0y+ xy0-)
(foo x0y- xy0+)
(foo x0y- xy0-)
(multiple-value-bind (y m) (if (plusp m)
(values (1- y) (- m (* 8 y)))
(values y m))
(when (<= x y)
(put (1+ x)
y
(+ m 4 (* 8 x))))))))
(put 0 radius (- 5 (* 4 radius)))
(values)))

5
Task/Bitmap-Midpoint-circle-algorithm/Common-Lisp/bitmap-midpoint-circle-algorithm-2.lisp Normal file
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CL-USER> (let ((buffer (make-array '(30 30)
:element-type 'bit)))
(draw-circle (lambda (x y)
(setf (bit buffer x y) 1)) 15 15 10)
buffer)

40
Task/Bitmap-Midpoint-circle-algorithm/D/bitmap-midpoint-circle-algorithm.d Normal file
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import bitmap: Image, RGB;
void circle(Color)(Image!Color img, in int x0, in int y0,
in int radius, in Color color) pure nothrow {
int f = 1 - radius;
int ddfX = 1;
int ddfY = -2 * radius;
int x = 0;
int y = radius;
img[x0, y0 + radius] = color;
img[x0, y0 - radius] = color;
img[x0 + radius, y0] = color;
img[x0 - radius, y0] = color;
while (x < y) {
if (f >= 0) {
y--;
ddfY += 2;
f += ddfY;
}
x++;
ddfX += 2;
f += ddfX;
img[x0 + x, y0 + y] = color;
img[x0 - x, y0 + y] = color;
img[x0 + x, y0 - y] = color;
img[x0 - x, y0 - y] = color;
img[x0 + y, y0 + x] = color;
img[x0 - y, y0 + x] = color;
img[x0 + y, y0 - x] = color;
img[x0 - y, y0 - x] = color;
}
}
void main() {
auto img = new Image!RGB(25, 25);
img.clear(RGB.white);
circle(img, 12, 12, 12, RGB.black);
img.textualShow();
}