public override void Paint(Graphics gr)
{
if (PlotterControl == null)
{
throw new InvalidOperationException("PlotterControl is null");
}
if (_function == null)
{
return;
}
int clientWidth = PlotterControl.ClientRectangle.Width;
if (_linesToDraw == null ||
_linesToDraw.Length != PlotterControl.ClientRectangle.Width)
{
_linesToDraw = new Point[PlotterControl.ClientRectangle.Width];
}
for (int screenX = 0; screenX < clientWidth; screenX++)
{
double spaceX = PlotterControl.ScreenX2SpaceX(screenX);
double spaceY = _function(spaceX);
int screenY = PlotterControl.SpaceY2ScreenY(spaceY);
_linesToDraw[screenX] = new Point(screenX, screenY);
}
using (Pen pen = new Pen(ForeColor, LineWidth))
{
pen.LineJoin = System.Drawing.Drawing2D.LineJoin.Round;
gr.DrawLines(pen, _linesToDraw);
}
}
public override void Paint(System.Drawing.Graphics gr)
{
if (PlotterControl == null)
{
throw new InvalidOperationException("PlotterControl is null");
}
if (_function == null)
{
return;
}
int screenWidth = PlotterControl.ClientRectangle.Width;
int screenHeight = PlotterControl.ClientRectangle.Height;
Bitmap bmp = new Bitmap(screenWidth, screenHeight,
PixelFormat.Format32bppArgb);
Rectangle wholeBitmap = new Rectangle(0, 0, bmp.Width, bmp.Height);
BitmapData bmpData = bmp.LockBits(wholeBitmap,
ImageLockMode.WriteOnly, bmp.PixelFormat);
try
{
int strideAbs = Math.Abs(bmpData.Stride);
bool bottomUp = bmpData.Stride < 0;
byte[] bmpBuf = new byte[strideAbs * bmpData.Height];
int scanLine = 0;
int yFirst = bottomUp ? bmpData.Height - 1 : 0;
int yAfterLast = bottomUp ? -1 : bmpData.Height;
int dy = bottomUp ? -1 : 1;
for (int screenY = yFirst;
screenY != yAfterLast;
screenY += dy, scanLine += strideAbs)
{
double y = PlotterControl.ScreenY2SpaceY(screenY);
int pixelIndex = scanLine;
for (int screenX = 0; screenX < bmpData.Width; screenX++)
{
double x = PlotterControl.ScreenX2SpaceX(screenX);
Color col = _function(x, y);
bmpBuf[pixelIndex++] = col.B;
bmpBuf[pixelIndex++] = col.G;
bmpBuf[pixelIndex++] = col.R;
bmpBuf[pixelIndex++] = col.A;
}
}
System.Runtime.InteropServices.Marshal.Copy(bmpBuf, 0, bmpData.Scan0,
bmpBuf.Length);
}
finally
{
bmp.UnlockBits(bmpData);
}
/*for (int screenY = 0; screenY < screenHeight; screenY++)
* {
* double y = PlotterControl.ScreenY2SpaceY(screenY);
* for (int screenX = 0; screenX < screenWidth; screenX++)
* {
* double x = PlotterControl.ScreenX2SpaceX(screenX);
* bmp.SetPixel(screenX, screenY, _function(x, y));
* }
* }*/
gr.DrawImage(bmp, 0, 0);
}
