public static void exportCompleteDrawingStructToWMF(string in_pathToWMFFile, double in_scalefactor, DXFRendering.LOGICAL.completeDxfStruct in_dxfStruct)
{
MyDxfBoundingBox theBoundingBox = in_dxfStruct.GetBoundingBox();
double bitmapInitialWidth = Math.Abs(theBoundingBox.XLowerLeft - theBoundingBox.XUpperRight);
double bitmapInitialHeight = Math.Abs(theBoundingBox.YLowerLeft - theBoundingBox.YUpperRight);
//you know, dxf file might not be located at 0; 0 as lower Left. So I apply movement coefficients
double unscaledOffsetX = theBoundingBox.XLowerLeft;
double unscaledOffsetY = theBoundingBox.YLowerLeft;
double newWidthPrescaled = in_scalefactor * bitmapInitialWidth;
double newHeightPrescaled = in_scalefactor * bitmapInitialHeight;
int wdth = (int)Math.Ceiling(newWidthPrescaled) + 1;
int hght = (int)Math.Ceiling(newHeightPrescaled) + 1;
var wmf = new WmfDocument();
wmf.Width = wdth;
wmf.Height = hght;
//https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-wmf/828e1864-7fe7-42d8-ab0a-1de161b32f27
// 1440 ?
wmf.Format.Unit = 288;
wmf.AddCreatePenIndirect(Color.Black, PenStyle.PS_SOLID, 1); //0: generic pen, black
wmf.AddCreatePenIndirect(Color.Red, PenStyle.PS_SOLID, 1); //1: PVC pen, red
wmf.AddCreatePenIndirect(Color.Blue, PenStyle.PS_SOLID, 1); //2: ALU pen, blue
wmf.AddCreatePenIndirect(Color.Yellow, PenStyle.PS_SOLID, 1); //3: EXT Prof pen, yellow
wmf.AddCreatePenIndirect(Color.Orange, PenStyle.PS_SOLID, 1); //4: Thermic bridge pen, orange
int allElementsLength = in_dxfStruct.getSize();
// similar to prepareGraphicalDataStruct
for (int i = 0; i < allElementsLength; i++)
{
DXFRendering.LOGICAL.DXFdrawingEntry someEntry = in_dxfStruct.getItemByIndex(i);
// I use y candidates to perform flipping vertically. It is possible to redirect Y axy, but that WMF entry is barely supported
if (someEntry is DXFRendering.LOGICAL.MyDxfLine)
{
MyDxfLine lineEntry = someEntry as MyDxfLine;
int indx = getindexOfPenByLayerName(lineEntry.layerIdentifier);
if (indx >= 0)
{
wmf.AddSelectObject(indx);
int y1candidate = (int)Math.Ceiling((lineEntry.YStart - unscaledOffsetY) * in_scalefactor);
int y2candidate = (int)Math.Ceiling((lineEntry.YEnd - unscaledOffsetY) * in_scalefactor);
wmf.AddLine(
new Point(
(int)Math.Ceiling((lineEntry.XStart - unscaledOffsetX) * in_scalefactor),
-y1candidate + hght),
new Point(
(int)Math.Ceiling((lineEntry.XEnd - unscaledOffsetX) * in_scalefactor),
-y2candidate + hght)
);
}
}
else if (someEntry is DXFRendering.LOGICAL.MyDxfArc)
{
DXFRendering.LOGICAL.MyDxfArc castArc = someEntry as DXFRendering.LOGICAL.MyDxfArc;
//https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-wmf/742097b4-5879-4c36-b57e-77e7cc152253
int indx = getindexOfPenByLayerName(castArc.layerIdentifier);
if (indx >= 0)
{
wmf.AddSelectObject(indx);
int yRectangleCandidate = (int)Math.Ceiling((castArc.YCenter - castArc.Radius - unscaledOffsetY) * in_scalefactor);
int dimCandidate = (int)Math.Ceiling(2 * castArc.Radius * in_scalefactor);
Rectangle boundRectangle = new Rectangle(
(int)Math.Ceiling((castArc.XCenter - castArc.Radius - unscaledOffsetX) * in_scalefactor),
-yRectangleCandidate + hght - dimCandidate,
dimCandidate,
dimCandidate);
int yPnt1Candidate = (int)Math.Ceiling((castArc.YCenter + castArc.Radius * Math.Sin(castArc.StartAngleRad) - unscaledOffsetY) * in_scalefactor);
Point pnt1 = new Point(
(int)Math.Ceiling((castArc.XCenter + castArc.Radius * Math.Cos(castArc.StartAngleRad) - unscaledOffsetX) * in_scalefactor),
-yPnt1Candidate + hght
);
int yPnt2Candidate = (int)Math.Ceiling((castArc.YCenter + castArc.Radius * Math.Sin(castArc.EndAngleRad) - unscaledOffsetY) * in_scalefactor);
Point pnt2 = new Point(
(int)Math.Ceiling((castArc.XCenter + castArc.Radius * Math.Cos(castArc.EndAngleRad) - unscaledOffsetX) * in_scalefactor),
-yPnt2Candidate + hght
);
wmf.AddArc(boundRectangle, pnt1, pnt2);
/*
* wmf.AddRectangle(boundRectangle);
* wmf.AddSelectObject(3);
* wmf.AddLine(pnt1, pnt2);
*/
}
}
}
wmf.AddDeleteObject(0);
wmf.AddDeleteObject(1);
wmf.AddDeleteObject(2);
wmf.AddDeleteObject(3);
wmf.AddDeleteObject(4);
wmf.Save(in_pathToWMFFile);
}
public static completeDxfStruct processDxfFile(string in_obtainedFileName)
{
completeDxfStruct valueToReturn = new completeDxfStruct();
DxfFile dxfFile;
using (System.IO.FileStream fs = new System.IO.FileStream(in_obtainedFileName, System.IO.FileMode.Open))
{
dxfFile = DxfFile.Load(fs);
IList <DxfBlock> allBlocks = dxfFile.Blocks;
IList <DxfEntity> usedEntities;
if ((allBlocks.Count == 0) || (allBlocks[0].Name.ToUpper().Contains("MODEL") == false))
{
usedEntities = dxfFile.Entities;
}
else
{
usedEntities = allBlocks[0].Entities;
}
foreach (DxfEntity entity in dxfFile.Entities)
{
switch (entity.EntityType)
{
case DxfEntityType.Line:
{
DxfLine line = (DxfLine)entity;
MyDxfLine TransfLine = new MyDxfLine(line.P1.X, line.P1.Y, line.P2.X, line.P2.Y, line.Layer);
valueToReturn.addDxfDrawingEntry(TransfLine);
break;
}
case DxfEntityType.Arc:
{
DxfArc arc = (DxfArc)entity;
MyDxfArc TransfArc = new MyDxfArc(arc.Center.X, arc.Center.Y, arc.StartAngle, arc.EndAngle, arc.Radius, arc.Layer);
valueToReturn.addDxfDrawingEntry(TransfArc);
break;
}
case DxfEntityType.LwPolyline:
{ //polyline. It has vertices.
DxfLwPolyline polylineS = entity as DxfLwPolyline;
int totalnumberOfVertices = polylineS.Vertices.Count;
for (int i = 0; i < totalnumberOfVertices - 1; i++)
{ //iterate through vertices, taking them by 2. A figure is between these two
DxfLwPolylineVertex point1 = polylineS.Vertices[i];
DxfLwPolylineVertex point2 = polylineS.Vertices[i + 1];
if (point1.Bulge == 0)
{
MyDxfLine TransfLine = new MyDxfLine(point1.X, point1.Y, point2.X, point2.Y, polylineS.Layer);
valueToReturn.addDxfDrawingEntry(TransfLine);
}
else //it is arc
// The bulge is the tangent of one fourth the included angle for an arc segment,
// made negative if the arc goes clockwise from the start point to the endpoint.
// A bulge of 0 indicates a straight segment, and a bulge of 1 is a semicircle
{
double angleOfArcRad = System.Math.Atan(Math.Abs(point1.Bulge)) * 4;
// http://mymathforum.com/algebra/21368-find-equation-circle-given-two-points-arc-angle.html
// tides of Internet have almost washed this post in forum
double xA; double xB; double yA; double yB;
if (point1.Bulge < 0)
{
xA = point2.X; yA = point2.Y;
xB = point1.X; yB = point1.Y;
}
else
{
xA = point1.X; yA = point1.Y;
xB = point2.X; yB = point2.Y;
}
double d_square = (xA - xB) * (xA - xB) + (yA - yB) * (yA - yB);
double r_square = (d_square) / (2.0 * (1.0 - Math.Cos(angleOfArcRad)));
double m = (xA - xB) / (yB - yA);
double a = Math.Sqrt(r_square - d_square / 4.0);
double xM = (xA + xB) / 2.0; double yM = (yA + yB) / 2.0;
double xC_plus = xM + a / Math.Sqrt(m * m + 1);
double xC_minus = xM - a / Math.Sqrt(m * m + 1);
double yC_plus = yM + m * a / Math.Sqrt(m * m + 1);
double yC_minus = yM - m * a / Math.Sqrt(m * m + 1);
// https://en.wikipedia.org/wiki/Linear_equation#Point%E2%80%93slope_form
double usedXCenter; double usedYCenter; double usedAngle1; double usedAngle2;
// https://stackoverflow.com/questions/1311049/how-to-map-atan2-to-degrees-0-360
double angle1_candidate1 = (Math.Atan2(yA - yC_plus, xA - xC_plus) * 180 / Math.PI + 360) % 360;
double angle2_candidate1 = (Math.Atan2(yB - yC_plus, xB - xC_plus) * 180 / Math.PI + 360) % 360;
double angle1_candidate2 = (Math.Atan2(yA - yC_minus, xA - xC_minus) * 180 / Math.PI + 360) % 360;
double angle2_candidate2 = (Math.Atan2(yB - yC_minus, xB - xC_minus) * 180 / Math.PI + 360) % 360;
//mydxfarc expects angles counterclockwise
if (point1.Bulge > 0)
{
if (angle1_candidate1 < angle2_candidate1)
{
usedAngle1 = angle1_candidate1;
usedAngle2 = angle2_candidate1;
usedXCenter = xC_plus; usedYCenter = yC_plus;
}
else
{
usedAngle1 = angle1_candidate2;
usedAngle2 = angle2_candidate2;
usedXCenter = xC_minus; usedYCenter = yC_minus;
}
}
else
{
if (angle1_candidate1 > angle2_candidate1)
{
usedAngle1 = angle1_candidate2;
usedAngle2 = angle2_candidate2;
usedXCenter = xC_minus; usedYCenter = yC_minus;
}
else
{
usedAngle1 = angle1_candidate1;
usedAngle2 = angle2_candidate1;
usedXCenter = xC_plus; usedYCenter = yC_plus;
}
}
MyDxfArc TransfArc = new MyDxfArc(usedXCenter, usedYCenter,
usedAngle1,
usedAngle2,
Math.Sqrt(r_square),
polylineS.Layer);
valueToReturn.addDxfDrawingEntry(TransfArc);
}
}
if (polylineS.IsClosed)
{
DxfLwPolylineVertex point1 = polylineS.Vertices[totalnumberOfVertices - 1];
DxfLwPolylineVertex point2 = polylineS.Vertices[0];
if (point1.Bulge == 0)
{
MyDxfLine TransfLine = new MyDxfLine(point1.X, point1.Y, point2.X, point2.Y, polylineS.Layer);
valueToReturn.addDxfDrawingEntry(TransfLine);
}
else // arc
// I so like the code above, so I cannot resist to copypaste it
{
double angleOfArcRad = System.Math.Atan(Math.Abs(point1.Bulge)) * 4;
double xA; double xB; double yA; double yB;
if (point1.Bulge < 0)
{
xA = point2.X; yA = point2.Y; xB = point1.X; yB = point1.Y;
}
else
{
xA = point1.X; yA = point1.Y; xB = point2.X; yB = point2.Y;
}
double d_square = (xA - xB) * (xA - xB) + (yA - yB) * (yA - yB);
double r_square = (d_square) / (2.0 * (1.0 - Math.Cos(angleOfArcRad)));
double m = (xA - xB) / (yB - yA);
double a = Math.Sqrt(r_square - d_square / 4.0);
double xM = (xA + xB) / 2.0; double yM = (yA + yB) / 2.0;
double xC_plus = xM + a / Math.Sqrt(m * m + 1);
double xC_minus = xM - a / Math.Sqrt(m * m + 1);
double yC_plus = yM + m * a / Math.Sqrt(m * m + 1);
double yC_minus = yM - m * a / Math.Sqrt(m * m + 1);
// https://en.wikipedia.org/wiki/Linear_equation#Point%E2%80%93slope_form
double usedXCenter; double usedYCenter; double usedAngle1; double usedAngle2;
// https://stackoverflow.com/questions/1311049/how-to-map-atan2-to-degrees-0-360
double angle1_candidate1 = (Math.Atan2(yA - yC_plus, xA - xC_plus) * 180 / Math.PI + 360) % 360;
double angle2_candidate1 = (Math.Atan2(yB - yC_plus, xB - xC_plus) * 180 / Math.PI + 360) % 360;
double angle1_candidate2 = (Math.Atan2(yA - yC_minus, xA - xC_minus) * 180 / Math.PI + 360) % 360;
double angle2_candidate2 = (Math.Atan2(yB - yC_minus, xB - xC_minus) * 180 / Math.PI + 360) % 360;
//mydxfarc expects angles counterclockwise
if (point1.Bulge > 0)
{
if (angle1_candidate1 < angle2_candidate1)
{
usedAngle1 = angle1_candidate1; usedAngle2 = angle2_candidate1;
usedXCenter = xC_plus; usedYCenter = yC_plus;
}
else
{
usedAngle1 = angle1_candidate2; usedAngle2 = angle2_candidate2;
usedXCenter = xC_minus; usedYCenter = yC_minus;
}
}
else
{
if (angle1_candidate1 > angle2_candidate1)
{
usedAngle1 = angle1_candidate2; usedAngle2 = angle2_candidate2;
usedXCenter = xC_minus; usedYCenter = yC_minus;
}
else
{
usedAngle1 = angle1_candidate1; usedAngle2 = angle2_candidate1;
usedXCenter = xC_plus; usedYCenter = yC_plus;
}
}
MyDxfArc TransfArc = new MyDxfArc(usedXCenter, usedYCenter,
usedAngle1, usedAngle2, Math.Sqrt(r_square), polylineS.Layer);
valueToReturn.addDxfDrawingEntry(TransfArc);
}
}
break;
}
case DxfEntityType.Polyline:
{
//this is a spawn of autocad. Either copypaste code from LwPolyline section. Or just save the file in QCad.
//QCad replaces all polylines by lwPolylines
//https://github.com/IxMilia/Dxf/issues/90
DxfPolyline polyline = entity as DxfPolyline;
break;
}
}
}
}
return(valueToReturn);
}
