public static Matrix LookAtLH(Location start, Location end, Location up)
{
Location zAxis = (end - start).Normalize();
Location xAxis = up.CrossProduct(zAxis).Normalize();
Location yAxis = zAxis.CrossProduct(xAxis);
return(new Matrix((double)xAxis.X, (double)yAxis.X, (double)zAxis.X, 0, (double)xAxis.Y,
(double)yAxis.Y, (double)zAxis.Y, 0, (double)xAxis.Z, (double)yAxis.Z, (double)zAxis.Z, 0,
(double)-xAxis.Dot(start), (double)-yAxis.Dot(start), (double)-zAxis.Dot(start), 1));
}
