diff options
Diffstat (limited to 'src/cmd/plot/libplot/rarc.c')
| -rw-r--r-- | src/cmd/plot/libplot/rarc.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/src/cmd/plot/libplot/rarc.c b/src/cmd/plot/libplot/rarc.c index 9c8ccf15..c0c8c6b3 100644 --- a/src/cmd/plot/libplot/rarc.c +++ b/src/cmd/plot/libplot/rarc.c @@ -12,31 +12,31 @@ void rarc(double x1, double y1, double x2, double y2, double xc, double yc, doub dx = x1 - xc; dy = y1 - yc; rd = sqrt(dx * dx + dy * dy); - if (rd / e1->quantum < 1.0) { - move(xc, yc); - vec(xc, yc); + if (rd / e1->quantum < 1.0) { + move(xc, yc); + vec(xc, yc); return; } dph = acos(1.0 - (e1->quantum / rd)); - if (dph > PI4) + if (dph > PI4) dph = PI4; ph=atan2((y2-yc),(x2 - xc)) - atan2(dy, dx); - if (ph < 0) - ph += 6.2832; - if (rr < 0) + if (ph < 0) + ph += 6.2832; + if (rr < 0) ph = 6.2832 - ph; - if (ph < dph) + if (ph < dph) plotline(x1, y1, x2, y2); else { - n = ph / dph; - a = cos(dph); - b = sin(dph); - if (rr < 0) + n = ph / dph; + a = cos(dph); + b = sin(dph); + if (rr < 0) b = -b; move(x1, y1); while ((n--) >= 0) { - xnext = dx * a - dy * b; - dy = dx * b + dy * a; + xnext = dx * a - dy * b; + dy = dx * b + dy * a; dx = xnext; vec(dx + xc, dy + yc); } |