Question

I need a routine to get some random 2D vectors with higher probability to random spots. The spots can be rectangles as well. Please help me.

The function have to look like these

public Vector GetRandomHotSpotVectors(Vector minPosition, Vector maxPostion, int spotsCount, float minSpotSize, float maxSpotSize, int VectorCount);

var vectors = GetRandomHotSpotVectors(new Vector(0,0), new Vector(200,200), 2, 20, 30, 44);

Answer 1

    public static readonly Random Rand = new Random();        

    public static float NextFloat(float min, float max)
    {
        return min + ((float)Rand.NextDouble() * (max - min));
    }

    public static Vector4[] GetHotSpotVectors(
        Vector2 leftTop, 
        Vector2 rightBottom, 
        int spotsCount, 
        float minSpotSize, 
        float maxSpotSize,
        float minVectorObjSize,
        float maxVectorObjSize,
        int vectorCount)
    {
        var vectors = new Vector4[vectorCount];
        var vectorsProceeded = 0;

        for (var i = 0; i != spotsCount; i++)
        {
            var spotSize = NextFloat(minSpotSize, maxSpotSize);
            var left = NextFloat(leftTop.X, rightBottom.X - spotSize);
            var top = NextFloat(leftTop.Y, rightBottom.Y - spotSize);
            var right = left + spotSize;
            var bottom = top + spotSize;

            var currSpotCount = vectorCount / spotsCount;

            for (var j = vectorsProceeded; j < vectorsProceeded + currSpotCount; j++)
            {
                var vecObjSize = NextFloat(minSpotSize, maxVectorObjSize);
                vectors[j] = new Vector4(
                    NextFloat(left, right), 
                    NextFloat(top, bottom), 
                    vecObjSize, 
                    vecObjSize);
            }
            vectorsProceeded += currSpotCount;
        }

        return vectors;
    }