Exemple #1
0
        private void Audio_DataAvailable(object sender, WaveInEventArgs e)
        {
            VertexData        vd;
            List <VertexData> data = new List <VertexData>();

            for (int i = 0; i < e.BytesRecorded; i += 8)
            {
                vd          = new VertexData();
                vd.Position = new Vector2(
                    BitConverter.ToSingle(e.Buffer, i),
                    BitConverter.ToSingle(e.Buffer, i + 4)
                    );
                data.Add(vd);
            }

            if (settings.Interpolate)
            {
                data = LineTools.Interpolate(data, settings.IntrpLevel);
            }

            LineTools.ComputeNormals(ref data);
            if (dataQueue.Count > data.Count)
            {
                dataQueue.Clear();
            }
            ticks        = Math.Max(ticks - 1, 1);
            vertexLength = (int)Math.Ceiling((double)(data.Count / ticks));

            /*vertexLength = Math.Max(vertexLength, 1000);
             * vertexLength = Math.Min(vertexLength, data.Count);*/
            ticks = 0;
            data.ForEach(dataQueue.Enqueue);

            // if the new vertex count is bigger than the cache, set it up again
            if (vertexLength * LineMaterial.VERTEX_STRIDE > vertices.Length)
            {
                setupArrays(vertexLength);
            }
        }
Exemple #2
0
        public static void ComputeNormals(ref List <VertexData> data)
        {
            float      miterMax = Width * 1.5f;
            float      halfWidth = Width / 2f;
            bool       isFirst = true; // work-around non-nullable vectors
            bool       isLast = false;
            VertexData last, cur, next = new VertexData();
            Vector2    tangent, dirA, dirB, curNormal = Vector2.Zero;

            for (int i = 1; i < data.Count; i++)
            {
                last = data[i - 1];
                cur  = data[i];
                if (i < data.Count - 1)
                {
                    next = data[i + 1];
                }
                else
                {
                    isLast = true;
                }

                dirA = (cur.Position - last.Position).Normalized();
                if (isFirst) // set up first normal
                {
                    last.Normal      = new Vector2(-dirA.Y, dirA.X);
                    last.MiterLength = Width;
                    data[0]          = last;
                    isFirst          = false;
                }

                if (isLast)  // set up last normal
                {
                    cur.Normal      = new Vector2(-dirA.Y, dirA.X);
                    cur.MiterLength = Width;
                }
                else
                {
                    dirB = (next.Position - cur.Position).Normalized();

                    // compute miter by Matt DesLauriers @mattdesl

                    // get tangent line
                    tangent = (dirA + dirB).Normalized();
                    // get miter as unit vector
                    cur.Normal = new Vector2(-tangent.Y, tangent.X);

                    //get the necessary length of our miter
                    cur.MiterLength = halfWidth / Vector2.Dot(cur.Normal, new Vector2(-dirA.Y, dirA.X));
                    if (cur.MiterLength < -miterMax)
                    {
                        cur.MiterLength = -miterMax;                              // Math.Abs(cur.MiterLength);
                    }
                    if (cur.MiterLength > miterMax)
                    {
                        cur.MiterLength = miterMax;
                    }
                }

                data[i] = cur;
            }
        }