Valid Blend

Question

User539648229 posted

Hi

I wrote a method to generate random Blend:

        private Blend GetRandomBlend()
        {
            Random rnd = new Random();
            int count = rnd.Next(11);
            Blend blend = new Blend();

            if (count > 0) 
            {
                float[] f = new float[count];
                float[] p = new float[count];
                for (int i = 0; i < f.Length; i++)
                {
                    f[i] = Convert.ToSingle(rnd.NextDouble());
                    p[i] = Convert.ToSingle(rnd.NextDouble());
                }

                blend.Factors = f.OrderBy(e => e).ToArray();
                blend.Positions = p.OrderBy(e => e).ToArray();
            }

            return blend;
        }

But when I assign this Blend to LinearGradientBrush there is an exeption that says: "Parameter is not valid". What is wrong with it? How can I find criteria like this? There is nothing in the documentation about these types of criteria for Blend and some other classes.

Thanks

Answer 1

User-760709272 posted

// Make your positions and factors start with 0 and end with 1
blend.Positions[0] = 0;
blend.Positions[blend.Positions.Length - 1] = 1;
blend.Factors[0] = 0;
blend.Factors[blend.Factors.Length - 1] = 1;

return blend;

Answer 2

User539648229 posted

Hi

Actually only Position needs these assignments.

Thanks

Answer 3

User-760709272 posted

That's what I thought, but I occasionally got errors still...they only stopped when Factors had proper stat/end points too.