public void Paint(IGraphicsContext3D g, IPlotArea layer, Processed3DPlotData pdata, Processed3DPlotData prevItemData, Processed3DPlotData nextItemData)
{
if (this._labelColumnProxy.Document == null)
return;
if (null != _attachedPlane)
_attachedPlane = layer.UpdateCSPlaneID(_attachedPlane);
PlotRangeList rangeList = pdata.RangeList;
var ptArray = pdata.PlotPointsInAbsoluteLayerCoordinates;
Altaxo.Data.IReadableColumn labelColumn = this._labelColumnProxy.Document;
bool isUsingVariableColorForLabelText = null != _cachedColorForIndexFunction && IsColorReceiver;
bool isUsingVariableColorForLabelBackground = null != _cachedColorForIndexFunction &&
(null != _backgroundStyle && _backgroundStyle.SupportsUserDefinedMaterial && (_backgroundColorLinkage == ColorLinkage.Dependent || _backgroundColorLinkage == ColorLinkage.PreserveAlpha));
bool isUsingVariableColor = isUsingVariableColorForLabelText || isUsingVariableColorForLabelBackground;
IMaterial clonedTextBrush = _material;
IMaterial clonedBackBrush = null;
if (isUsingVariableColorForLabelBackground)
clonedBackBrush = _backgroundStyle.Material;
// save the graphics stat since we have to translate the origin
var gs = g.SaveGraphicsState();
double xpos = 0, ypos = 0, zpos = 0;
double xpre, ypre, zpre;
double xdiff, ydiff, zdiff;
bool isFormatStringContainingBraces = _labelFormatString?.IndexOf('{') >= 0;
var culture = System.Threading.Thread.CurrentThread.CurrentCulture;
bool mustUseLogicalCoordinates = null != this._attachedPlane || 0 != _cachedLogicalShiftX || 0 != _cachedLogicalShiftY || 0 != _cachedLogicalShiftZ;
for (int r = 0; r < rangeList.Count; r++)
{
int lower = rangeList[r].LowerBound;
int upper = rangeList[r].UpperBound;
int offset = rangeList[r].OffsetToOriginal;
for (int j = lower; j < upper; j += _skipFrequency)
{
string label;
if (string.IsNullOrEmpty(_labelFormatString))
{
label = labelColumn[j + offset].ToString();
}
else if (!isFormatStringContainingBraces)
{
label = labelColumn[j + offset].ToString(_labelFormatString, culture);
}
else
{
// the label format string can contain {0} for the label column item, {1} for the row index, {2} .. {4} for the x, y and z component of the data point
label = string.Format(_labelFormatString, labelColumn[j + offset], j + offset, pdata.GetPhysical(0, j + offset), pdata.GetPhysical(1, j + offset), pdata.GetPhysical(2, j + offset));
}
if (string.IsNullOrEmpty(label))
continue;
double localSymbolSize = _symbolSize;
if (null != _cachedSymbolSizeForIndexFunction)
{
localSymbolSize = _cachedSymbolSizeForIndexFunction(j + offset);
}
double localFontSize = _fontSizeOffset + _fontSizeFactor * localSymbolSize;
if (!(localFontSize > 0))
continue;
_font = _font.WithSize(localFontSize);
// Start of preparation of brushes, if a variable color is used
if (isUsingVariableColor)
{
var c = _cachedColorForIndexFunction(j + offset);
if (isUsingVariableColorForLabelText)
{
clonedTextBrush = clonedTextBrush.WithColor(new NamedColor(AxoColor.FromArgb(c.A, c.R, c.G, c.B), "e"));
}
if (isUsingVariableColorForLabelBackground)
{
if (_backgroundColorLinkage == ColorLinkage.PreserveAlpha)
clonedBackBrush = clonedBackBrush.WithColor(new NamedColor(AxoColor.FromArgb(clonedBackBrush.Color.Color.A, c.R, c.G, c.B), "e"));
else
clonedBackBrush = clonedBackBrush.WithColor(new NamedColor(AxoColor.FromArgb(c.A, c.R, c.G, c.B), "e"));
}
}
// end of preparation of brushes for variable colors
if (mustUseLogicalCoordinates) // we must use logical coordinates because either there is a shift of logical coordinates, or an attached plane
{
Logical3D r3d = layer.GetLogical3D(pdata, j + offset);
r3d.RX += _cachedLogicalShiftX;
r3d.RY += _cachedLogicalShiftY;
r3d.RZ += _cachedLogicalShiftZ;
if (null != this._attachedPlane)
{
var pp = layer.CoordinateSystem.GetPointOnPlane(this._attachedPlane, r3d);
xpre = pp.X;
ypre = pp.Y;
zpre = pp.Z;
}
else
{
PointD3D pt;
layer.CoordinateSystem.LogicalToLayerCoordinates(r3d, out pt);
xpre = pt.X;
ypre = pt.Y;
zpre = pt.Z;
}
}
else // no shifting, thus we can use layer coordinates
{
xpre = ptArray[j].X;
ypre = ptArray[j].Y;
zpre = ptArray[j].Z;
}
xdiff = xpre - xpos;
ydiff = ypre - ypos;
zdiff = zpre - zpos;
xpos = xpre;
ypos = ypre;
zpos = zpre;
g.TranslateTransform(xdiff, ydiff, zdiff);
g.RotateTransform(_rotationX, _rotationY, _rotationZ);
this.Paint(g, label, localSymbolSize, clonedTextBrush, clonedBackBrush);
g.RotateTransform(-_rotationX, -_rotationY, -_rotationZ);
} // end for
}
g.RestoreGraphicsState(gs); // Restore the graphics state
}