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Modelica function that calculates intersection of two polynomials using Modelica.Math.Vectors.Utilities.roots
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function polyIntersect | |
input Real[:] poly1={3,2,1,0}; | |
input Real[:] poly2={8,7}; | |
output Real[:,2] intersect; | |
protected | |
Integer nPoly1 = size(poly1,1); | |
Integer nPoly2 = size(poly2,1); | |
Integer nPolyShort = min(nPoly1, nPoly2); | |
Integer nPolyLong = max(nPoly1, nPoly2); | |
Real[nPolyShort] polyShort; | |
Real[nPolyLong] polyLong; | |
Real[nPolyLong] polyDiff; | |
algorithm | |
if (nPoly1<nPoly2) then | |
polyShort := poly1; | |
polyLong := poly2; | |
else | |
polyShort := poly2; | |
polyLong := poly1; | |
end if; | |
polyDiff := polyLong; | |
for i in 0:nPolyShort-1 loop | |
polyDiff[nPolyLong-i] := polyLong[nPolyLong-i] - polyShort[nPolyShort-i]; | |
end for; | |
intersect := Modelica.Math.Vectors.Utilities.roots(polyDiff); | |
end polyIntersect; |
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