public MyDxfArc(double in_XCenter, double in_YCenter, double in_StartDegreeAngle, double in_EndDegreeAngle, double in_Radius)
{
XCenter = in_XCenter;
YCenter = in_YCenter;
StartAngleRad = MathHelperForTransformations.ConvertDegreesToRadians(in_StartDegreeAngle);
StartAngleDegree = in_StartDegreeAngle;
EndAngleDegree = in_EndDegreeAngle;
EndAngleRad = MathHelperForTransformations.ConvertDegreesToRadians(in_EndDegreeAngle);
doneTransformationOfAngle = false;
if (EndAngleRad < StartAngleRad)
{
EndAngleRad += 2 * Math.PI;
doneTransformationOfAngle = true;
}
Radius = in_Radius;
//calculate parameters required for drawing. C# arc has a weird definition
//https://docs.microsoft.com/en-us/dotnet/api/system.drawing.graphics.drawarc
drawStartAngleDegreeCW = in_StartDegreeAngle;
double drawEndAngleDegreeCW = in_EndDegreeAngle != 0 ? in_EndDegreeAngle : 359.9999999999999999;
if (drawEndAngleDegreeCW < drawStartAngleDegreeCW)
{
/*
* double tmpAngle = drawStartAngleDegreeCW;
* drawStartAngleDegreeCW = drawEndAngleDegreeCW;
* drawEndAngleDegreeCW = tmpAngle;
*/
drawEndAngleDegreeCW += 360.0;
}
drawSweepAngleDegree = drawEndAngleDegreeCW - drawStartAngleDegreeCW;
setupDrawingParameters();
}
/// <summary>
/// rotate all entries in a structure around bounding box center point. Changes coordinates of them
/// </summary>
/// <param name="in_deg"></param>
public void performRotationOfDxfStruct(double in_deg)
{
//obtain center of rotation
double horizontalMidPoint = (this.currentBoundingBox.XLowerLeft + this.currentBoundingBox.XUpperRight) / 2.0;
double verticalMidPoint = (this.currentBoundingBox.YLowerLeft + this.currentBoundingBox.YUpperRight) / 2.0;
//obtain rotation matrix
double[,] currentRotationMatrix = MathHelperForTransformations.getRotationMatrixAroundPoint(horizontalMidPoint, verticalMidPoint, MathHelperForTransformations.ConvertDegreesToRadians(in_deg));
//iterate over all entries in dxf structure altering them
for (int iii = 0; iii < AllDXFdrawingEntries.Count; iii++)
{
DXFdrawingEntry item = AllDXFdrawingEntries[iii];
if (item is MyDxfLine)
{
Tuple <double, double> coord1 = MathHelperForTransformations.rotateImageUsingPrecalculatedTransformationMatrix(currentRotationMatrix, (item as MyDxfLine).XStart, (item as MyDxfLine).YStart);
(item as MyDxfLine).XStart = coord1.Item1;
(item as MyDxfLine).YStart = coord1.Item2;
Tuple <double, double> coord2 = MathHelperForTransformations.rotateImageUsingPrecalculatedTransformationMatrix(currentRotationMatrix, (item as MyDxfLine).XEnd, (item as MyDxfLine).YEnd);
(item as MyDxfLine).XEnd = coord2.Item1;
(item as MyDxfLine).YEnd = coord2.Item2;
}
else if (item is MyDxfArc)
{
//center coordinates
Tuple <double, double> coordCenter = MathHelperForTransformations.rotateImageUsingPrecalculatedTransformationMatrix(currentRotationMatrix, (item as MyDxfArc).XCenter, (item as MyDxfArc).YCenter);
// Rotate start and stop angles. They are pointed by vectors, coming from Center and by magnitube of Radius
// https://www.youtube.com/watch?v=g9lgL6f3h90
/*
* double startAngleCoordinateX = (item as MyDxfArc).XCenter + (item as MyDxfArc).Radius * Math.Cos((item as MyDxfArc).StartAngleRad);
* double startAngleCoordinateY = (item as MyDxfArc).YCenter + (item as MyDxfArc).Radius * Math.Sin((item as MyDxfArc).StartAngleRad);
* double endAngleCoordinateX = (item as MyDxfArc).XCenter + (item as MyDxfArc).Radius * Math.Cos((item as MyDxfArc).EndAngleRad);
* double endAngleCoordinateY = (item as MyDxfArc).YCenter + (item as MyDxfArc).Radius * Math.Sin((item as MyDxfArc).EndAngleRad);
* //rotate vector which corresponds to start angle
* Tuple<double, double> startAnglePointNew = MathHelperForTransformations.rotateImageUsingPrecalculatedTransformationMatrix(currentRotationMatrix, (startAngleCoordinateX ), (startAngleCoordinateY ));
* double theta1Start = Math.Asin(Math.Abs(startAnglePointNew.Item2 - coordCenter.Item2) / (item as MyDxfArc).Radius);
* double startAngleDegree = MathHelperForTransformations.ConvertRadiansToDegrees(theta1Start);
* //rotate vector which corresponds to end angle
* Tuple<double, double> endAnglePointNew = MathHelperForTransformations.rotateImageUsingPrecalculatedTransformationMatrix(currentRotationMatrix, (endAngleCoordinateX ), (endAngleCoordinateY ));
* double theta2End = Math.Asin(Math.Abs(endAnglePointNew.Item2 - coordCenter.Item2) / (item as MyDxfArc).Radius);
* double endAngleDegree = MathHelperForTransformations.ConvertRadiansToDegrees(theta2End);
*/
double startAngleDegree = (item as MyDxfArc).StartAngleDegree + in_deg;
double endAngleDegree = (item as MyDxfArc).EndAngleDegree + in_deg;
AllDXFdrawingEntries[iii] = new MyDxfArc(coordCenter.Item1, coordCenter.Item2, startAngleDegree, endAngleDegree, (item as MyDxfArc).Radius);
}
}
//bounding box should be changed too. rotate ALL the coordinates of bounding rectangle and select the new appropriate values
recalculateBoundingBoxFromScratch();
}