private List <RightTriangle> ExpandMultiples(RightTriangle baseTri, int maxPerim)
{
List <RightTriangle> retVal = new List <RightTriangle>();
retVal.Add(baseTri);
int multiple = 2;
while (true)
{
RightTriangle newTri = new RightTriangle(multiple * baseTri.a, multiple * baseTri.b, multiple * baseTri.c);
if (newTri.GetPerimeter() <= maxPerim)
{
retVal.Add(newTri);
}
else
{
return(retVal);
}
}
}
private List <RightTriangle> GetUnscaledRightTriangles(int maxPerim)
{
List <RightTriangle> retVal = new List <RightTriangle>();
// using following method to generate triangles: [x2-y2]2 + [2xy]2 = [x2+y2]2
int maxXOrY = (int)Math.Sqrt(maxPerim);
for (int x = 2; x <= maxXOrY; x++)
{
for (int y = 1; y < x; y++)
{
RightTriangle baseTri = GenerateFromXY(x, y);
if (!retVal.Any(m => m.a == baseTri.a && m.b == baseTri.b))
{
if (baseTri.GetPerimeter() <= maxPerim)
{
retVal.Add(baseTri);
}
}
}
}
return(retVal);
}