private void DrawMomentum(Graphics graphics, DrawF draw)
{
ArrayList history = new ArrayList();
PointF2D point = new PointF2D(-4.0f, 2.0f);
Function2 fun = new Function2();
Momentum optimizer = new Momentum(0.07f, 0.9f);
for (int index = 0; index < 30; index++)
{
PointF2D xyPoint = draw.getBlockPoint(point.X, point.Y);
history.Add(xyPoint);
PointF2D diff = fun.DiffFormula(point.X, point.Y);
optimizer.Update(point, diff);
}
PointF2D prePoint = ((PointF2D)history[0]);
for (int index = 0; index < 30; index++)
{
draw.drawPoint(graphics, Brushes.Blue, ((PointF2D)history[index]));
draw.drawLine(graphics, prePoint, ((PointF2D)history[index]));
prePoint = ((PointF2D)history[index]);
}
}
private void DrawGradient(Graphics graphics, DrawF draw)
{
ArrayList xyPoints = new ArrayList();
ArrayList uvPoints = new ArrayList();
//float[] x = { -2, -1, 0, 1, -2, -1, 0, 1 };
//float[] y = { -2, -2, -2, -2, 1, 1, 1, 1 };
float[] x = { -2, -1, 0, 1, -2, -1, 0, 1 };
float[] y = { -2, -2, -2, -2, 1, 1, 1, 1 };
Function2 fun = new Function2();
for (int index = 0; index < 8; index++)
{
PointF2D xyPoint = draw.getBlockPoint(x[index], y[index]);
PointF2D uvPoint = Fun(fun, -x[index], -y[index]);
Console.Write(uvPoint.X + " " + uvPoint.Y);
xyPoints.Add(xyPoint);
uvPoints.Add(uvPoint);
draw.drawPoint(graphics, Brushes.Blue, xyPoint);
}
draw.drawGradients(graphics, xyPoints, uvPoints);
}
