Beauty of D
Gor Gyolchanyan
gor.f.gyolchanyan at gmail.com
Wed Apr 18 11:10:08 PDT 2012
This is a great example of how beautiful D really is.
/// Returns the t-th point on the bezier curve, defined by non-empty
set p of d-dimensional points, where t : [0, 1] and d > 1.
real[d] bezier(size_t d)(real[d][] p, real t)
if(d > 1)
in
{
assert(p.length > 0);
assert(t >= 0.0L && t <= 1.0L);
}
body
{
return p.length > 1 ? (1 - t) * p[0..$-1].bezier(t) + t *
p[1..$].bezier(t) : p[0];
}
/// Returns k unidistant points on the bezier curve, defined by
non-empty set p of d-dimensional points, where k > 0 and d > 1.
real[d][] bezier(size_t d)(real[d][] p, size_t k)
if(d > 1)
in
{
assert(p.length > 0);
assert(k > 0);
}
body
{
real[d][] result = new real[k];
foreach(i; 0..k)
result[k] = p.bezier(i * (1.0L / k));
return result;
}
--
Bye,
Gor Gyolchanyan.
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