diff options
Diffstat (limited to 'src/3rdparty/2geom/src/python/exact-arc-length-quad-bez.py')
| -rw-r--r-- | src/3rdparty/2geom/src/python/exact-arc-length-quad-bez.py | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/3rdparty/2geom/src/python/exact-arc-length-quad-bez.py b/src/3rdparty/2geom/src/python/exact-arc-length-quad-bez.py new file mode 100644 index 0000000..fd2f4b3 --- /dev/null +++ b/src/3rdparty/2geom/src/python/exact-arc-length-quad-bez.py @@ -0,0 +1,16 @@ +import math + +def q(x, a, b, c): + sa = math.sqrt(a) + y = math.sqrt(a*x*x+b*x+c) + dp = 2*a*x + b + r = dp*y/(4*a) + t = abs(dp + 2*y*sa) + s = (4*a*c-b*b)/(a*sa*8) + return r+s*math.log(t) + +a = 1160390 +b = -922658 +c = 249477 +print q(1, a,b,c) - q(0,a,b,c) + |