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fast sum for matrices too

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Adrian Mariano 2021-03-13 20:33:03 -05:00
parent 5faecd6e79
commit 9f249d9cf3
1 changed files with 1 additions and 1 deletions
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math.scad
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@ -585,7 +585,7 @@ function lcm(a,b=[]) =
function sum(v, dflt=0) = function sum(v, dflt=0) =
v==[]? dflt : v==[]? dflt :
assert(is_consistent(v), "Input to sum is non-numeric or inconsistent") assert(is_consistent(v), "Input to sum is non-numeric or inconsistent")
is_vector(v) ? [for(i=[1:len(v)]) 1]*v : is_vector(v) || is_matrix(v) ? [for(i=[1:len(v)]) 1]*v :
_sum(v,v[0]*0); _sum(v,v[0]*0);
function _sum(v,_total,_i=0) = _i>=len(v) ? _total : _sum(v,_total+v[_i], _i+1); function _sum(v,_total,_i=0) = _i>=len(v) ? _total : _sum(v,_total+v[_i], _i+1);