public override WriteableBitmap Draw(DrawingArgs args)
{
int w = (int)args.CanvasWidth;
int h = (int)args.CanvasHeight;
var fractalBitmap = new WriteableBitmap(w, h, 96.0, 96.0, PixelFormats.Bgra32, null);
var width = (int)fractalBitmap.Width;
var rawStride = (width * PixelFormats.Bgra32.BitsPerPixel + 7) / 8;
var points = GeneratePoints(args.StartPoint, args.IterationsCount, args.Scale);
var stride = w * 4;
var pixelData = new byte[h * stride];
Int32Rect rect;
int i = -1;
foreach (var point in points)
{
if (point.X < w && point.Y < h &&
point.X >= 0 && point.Y >= 0)
{
int offset = (int)point.Y * stride + (int)point.X * 4;
if (args.ColorMode)
{
UpdateColor(pixelData, offset);
}
else
{
pixelData[offset] = 255;
pixelData[offset + 1] = 255;
pixelData[offset + 2] = 255;
pixelData[offset + 3] = 255;
}
i++;
if (!args.DelayFlag || i % args.Delay != 0)
{
continue;
}
rect = new Int32Rect(0, 0, w, h);
fractalBitmap.WritePixels(rect, pixelData, rawStride, 0);
// TODO: partial redraw
//args.Image.Refresh();
//args.Image.InvalidateVisual();
//Thread.Sleep(args.Delay);
}
}
rect = new Int32Rect(0, 0, w, h);
fractalBitmap.WritePixels(rect, pixelData, rawStride, 0);
return(fractalBitmap);
}
public override WriteableBitmap Draw(DrawingArgs args)
{
/*var fractalBitmap = new WriteableBitmap((int)args.Canvas.ActualWidth, (int)args.Canvas.ActualHeight, 96.0, 96.0, PixelFormats.Bgra32, null);
* args.Image.Source = fractalBitmap;
*
* var width = (int)fractalBitmap.Width;
* var rawStride = (width * PixelFormats.Bgra32.BitsPerPixel + 7) / 8;
* var pixelData = new byte[] {255, 255, 255, 255};
*
* var startPoint = Mouse.GetPosition(args.Canvas);
* var scale = args.Scale;
*
*
* for (double imagCoord = 1.2; imagCoord >= -1.2; imagCoord -= 0.01)
* {
* for (double realCoord = -0.6; realCoord <= 1.77; realCoord += 0.01)
* {
* double realTemp = realCoord;
* double imagTemp = imagCoord;
* double arg = (realCoord * realCoord) + (imagCoord * imagCoord);
* for (int i = 0; (arg < 4) && (i < 40); i++)
* {
* double realTemp2 = (realTemp * realTemp) - (imagTemp * imagTemp) + realCoord;
* imagTemp = (2 * realTemp * imagTemp) + imagCoord;
* realTemp = realTemp2;
* arg = (realTemp * realTemp) + (imagTemp * imagTemp);
*
* points.Add(new Point(realTemp * scale + startPoint.X, startPoint.Y - imagTemp * scale));
* }
* }
* }
*
* foreach (var point in points)
* if (point.X < args.Canvas.ActualWidth && point.Y < args.Canvas.ActualHeight &&
* point.X >= 0 && point.Y >= 0)
* {
*
* var rect = new Int32Rect((int)Math.Abs(point.X), (int)Math.Abs(point.Y), 1, 1);
*
* fractalBitmap.WritePixels(rect, pixelData, rawStride, 0);
*
* if (!args.DelayFlag)
* continue;
* args.Image.Refresh();
* Thread.Sleep(args.Delay);
* }*/
return(null);
}
private void image_MouseUp(object sender, MouseButtonEventArgs e)
{
//canvas.UpdateLayout();
var fractal = Fractals[comboBoxFractals.SelectedIndex];
var args = new DrawingArgs
{
CanvasWidth = (int)ImageGrid.ActualWidth,
CanvasHeight = (int)ImageGrid.ActualHeight,
StartPoint = Mouse.GetPosition(ImageGrid),
ColorMode = checkBoxColorMode.IsChecked == true,
Delay = _delay,
IterationsCount = _iterationsCount,
DelayFlag = checkBoxDelay.IsChecked == true,
Scale = _scale
};
// TODO: make it at another thread
DrawFractalThread(fractal, args);
}
async void DrawFractalThread(AFractal fractal, DrawingArgs args)
{
FractalSettingsGrid.IsEnabled = false;
var bmp = fractal.Draw(args);
image.Source = bmp;
FractalSettingsGrid.IsEnabled = true;
// control size for Julia fractal
if (fractal.GetType() != typeof(JuliaFractal))
{
image.Width = bmp.Width;
image.Height = bmp.Height;
}
else
{
image.Width = args.CanvasWidth;
image.Height = args.CanvasHeight;
}
image.InvalidateArrange();
image.InvalidateMeasure();
}
public override WriteableBitmap Draw(DrawingArgs args)
{
return(_affineFractal.Draw(args));
}
public abstract WriteableBitmap Draw(DrawingArgs args);
public override WriteableBitmap Draw(DrawingArgs args)
{
int scale = (int)args.Scale;
var h = args.CanvasHeight;
var w = h;
var fractalBitmap = new WriteableBitmap(w * scale, h * scale, 96.0, 96.0, PixelFormats.Bgra32, null);
h = h * scale;
w = w * scale;
var stride = w * 4;
var pixelData = new byte[h * stride];
double xMin = double.NaN;
double yMin = double.NaN;
double xMax = double.NaN;
double yMax = double.NaN;
double r = CalculateR(C);
if (Double.IsNaN(xMin) || Double.IsNaN(xMax) || Double.IsNaN(yMin) || Double.IsNaN(yMax))
{
xMin = -r;
yMin = -r;
xMax = r;
yMax = r;
}
double xStep = Math.Abs(xMax - xMin) / w;
double yStep = Math.Abs(yMax - yMin) / h;
var xyIdx = new Dictionary <int, IDictionary <int, int> >();
int maxIdx = 0;
for (int i = 0; i < w; i++)
{
xyIdx.Add(i, new Dictionary <int, int>());
for (int j = 0; j < h; j++)
{
double x = xMin + i * xStep;
double y = yMin + j * yStep;
var z = new Complex(x, y);
var zIter = SqPolyIteration(z, C, args.IterationsCount, r);
int idx = zIter.Count - 1;
if (maxIdx < idx)
{
maxIdx = idx;
}
xyIdx[i].Add(j, idx);
}
}
for (int i = 0; i < w; i++)
{
for (int j = 0; j < h; j++)
{
int idx = xyIdx[i][j];
double x = xMin + i * xStep;
double y = yMin + j * yStep;
var z = new Complex(x, y);
var color = ComplexHeatMap(idx, 0, maxIdx, z, r);
pixelData[j * stride + (w - i - 1) * 4 + 0] = color.R;
pixelData[j * stride + (w - i - 1) * 4 + 1] = color.G;
pixelData[j * stride + (w - i - 1) * 4 + 2] = color.B;
pixelData[j * stride + (w - i - 1) * 4 + 3] = color.A;
}
}
var rect = new Int32Rect(0, 0, w - 1, h - 1);
var rawStride = (w * PixelFormats.Bgra32.BitsPerPixel + 7) / 8;
fractalBitmap.WritePixels(rect, pixelData, rawStride, 0);
return(fractalBitmap);
}
