public void Draw(Conv1D c)
{
// if (!dodraw) return;
//Draw2Xsection(); return;
drawlist.Add(c);
Form df = this;
int mar = 5; // y margin
df.Show();
Graphics formGraphics = df.CreateGraphics();
// formGraphics.Clear(Conv2DColor.Green);
Pen myPen = new Pen(col);
myPen.Width *= 1;
float ymax = c.Max(); // 1.5f; // c.Max()
float ymin = -ymax * 0.5f; // c.Min()
float rx = df.ClientSize.Width / (2 * drawRange);
float ry = (df.ClientSize.Height - 2 * mar) / (ymax - ymin);
float my = ymax + mar / ry;
float ov = 0;
for (float x = c.xlo; x <= c.xhi; x += c.xstep)
{
float v = c[x];
formGraphics.DrawLine(myPen, (x - c.xstep + drawRange) * rx, (my - ov) * ry, (x + drawRange) * rx, (my - v) * ry);
ov = v;
}
myPen.Dispose();
formGraphics.Dispose();
// Draw2Xsection();
}
private void SetTexture(Effects effects, float[,] a, Conv1D c1d)
{
int M = a.GetLength(0);
int N = a.GetLength(1);
xwidth = c1d.xwidth;
texture = new Texture2D(effects.graphicsDevice, N, M, 1, TextureUsage.Linear, SurfaceFormat.Single);
texture.SetData <float>(Flatten(a));
//xlo = c1d.xlo;
//xhi = c1d.xhi;
//xstep = c1d.xstep;
}
/// <summary>take a 1d conv and make it 2d by sweeping into a super-egg
/// note: only +ve part of input conv will be used
/// result will be array size K2xK2, with egg power p
///</summary>
private float[,] Circle2D(int K2, double p, Conv1D c1d)
{
float[,] rv = new float[K2, K2];
for (int i = 0; i < K2; i++)
{
for (int j = 0; j < K2; j++)
{
if (i == (int)(K2 / 2) && j == (int)(K2 / 2))
{
}
float ii = Math.Abs(P(i, K2));
float jj = Math.Abs(P(j, K2));
float rr = (float)Math.Pow(Math.Pow(ii, p) + Math.Pow(jj, p), 1 / p);
rv[i, j] = c1d[rr];
}
}
return(rv);
}
/// <summary>convolve two 1d convolutions</summary>
public static Conv1D operator *(Conv1D ca, Conv1D cb)
{
// conserve same spacing as ca
int N = (int)Math.Round((ca.xwidth + cb.xwidth) / ca.xstep);
Conv1D cc = new Conv1D(N, (ca.xwidth + cb.xwidth) / 2);
float[] rv = cc.v;
int i = 0;
for (float rx = cc.xlo; rx <= cc.xhi; rx += cc.xstep) // rx position in output
{
for (float bx = cb.xlo; bx <= cb.xhi; bx += ca.xstep) // bx position in b
{
rv[i] += ca[rx - bx] * cb[bx];
}
i++;
}
return(cc);
}
public Lanczos(Form1 form1, int a, double LancW, double SQWidth, int K, Effects effects) : base(effects)
{
//toggle = !toggle; if (toggle) return MakeLanczosOld(a, K);
if (K == 0)
{
K = 16; // default
}
int s = (int)Math.Ceiling(Math.Log(2 * a * K, 2));
int N = (int)Math.Round(Math.Pow(2, s)); // actual size of texture
float LSQWidth = (float)(Math.Max(0.001f, SQWidth)); // K * 8; // K * 4;
Lanc1D lanc = new Lanc1D(a, K * 20, (float)LancW);
//lanc.SetRange((float)LancW);
SQ1D sq = new SQ1D(LSQWidth);
Conv1D lancsq = lanc * sq;
SetTexture(effects, 64, lancsq);
form1.Draw(lancsq);
}
/// <summary>make a 2d convolution (with texture) from a 1d convolution (with array)</summary>
public void SetTexture(Effects effects, int K, Conv1D c1d)
{
xwidth = c1d.xwidth;
float[,] v2d = Circle2D(K, Form1.CircP, c1d);
SetTexture(effects, v2d, c1d);
}