public override void Layout()
{
if (_points != null && _points.Count > 0)
{
double lineLength = LineLength;
int currentPixelNum = 0;
if (lineLength > 0)
{
// Tracks the spacing between each of the pixels without worrying about the points.
double currentEmptySpace = 0;
// Length of the entire segment
for (int pointNum = 0; pointNum < _points.Count - 1; pointNum++)
{
double thisFullLineLength = SegmentLength(pointNum);
// First pixel is a special case
if (currentEmptySpace + thisFullLineLength > PixelSpacing || pointNum == 0)
{
double thisEmptyStartLength = PixelSpacing - currentEmptySpace;;
if (pointNum == 0)
{
thisEmptyStartLength = 0;
}
// Active length of the segment without the start
double thisActiveLineLength = thisFullLineLength - thisEmptyStartLength;
// Get the pixels in this line. No hangers on the end.
double pixelSpacesInThisLine = Math.Truncate(thisActiveLineLength / PixelSpacing);
//if (pixelSpacesInThisLine < 0) pixelSpacesInThisLine = 0;
double pixelsInThisLine = pixelSpacesInThisLine + 1;
// Re-calcuate the active line length
thisActiveLineLength = pixelSpacesInThisLine * PixelSpacing;
currentEmptySpace = thisFullLineLength - thisEmptyStartLength - thisActiveLineLength;
Point lineStartPoint = PreviewTools.CalculatePointOnLine(
new PreviewTools.Vector2(_points[pointNum].ToPoint()),
new PreviewTools.Vector2(_points[pointNum + 1].ToPoint()),
Convert.ToInt32(thisEmptyStartLength));
Point lineEndPoint = PreviewTools.CalculatePointOnLine(
new PreviewTools.Vector2(_points[pointNum].ToPoint()),
new PreviewTools.Vector2(_points[pointNum + 1].ToPoint()),
Convert.ToInt32(thisEmptyStartLength + thisActiveLineLength));
double xSpacing = (double)(lineStartPoint.X - lineEndPoint.X) / (double)(pixelSpacesInThisLine);
double ySpacing = (double)(lineStartPoint.Y - lineEndPoint.Y) / (double)(pixelSpacesInThisLine);
double x = lineStartPoint.X;
double y = lineStartPoint.Y;
for (int pixelNum = 0; pixelNum < pixelsInThisLine; pixelNum++)
{
if (currentPixelNum < Pixels.Count - 1)
{
Pixels[currentPixelNum].X = Convert.ToInt32(x);
Pixels[currentPixelNum].Y = Convert.ToInt32(y);
x -= xSpacing;
y -= ySpacing;
}
currentPixelNum++;
}
double a1 = _points[pointNum + 1].X - x;
double b1 = _points[pointNum + 1].Y - y;
}
else
{
currentEmptySpace += thisFullLineLength;
}
// Finally, put the last dot on the line
Pixels[PixelCount - 1].X = _points[_points.Count - 1].X;
Pixels[PixelCount - 1].Y = _points[_points.Count - 1].Y;
}
}
SetPixelZoom();
}
}