private SvgPath CreateSlotPath()
{
var endCapRadius = FastenerDiameter / 2f - Constants.Kerf;
var innerArcRadius = Constants.JigHoleSpacing - (FastenerDiameter / 2f - Constants.Kerf);
float innerArcX = innerArcRadius * DegreeTrig.Cos(startAngle);
float innerArcY = -innerArcRadius *DegreeTrig.Sin(startAngle); // y's are negative b/c they are above the origin hole
float outerArcX = outerArcRadius * DegreeTrig.Cos(startAngle);
float outerArcY = -outerArcRadius *DegreeTrig.Sin(startAngle);
var pointA = Points.MetricPoint(-outerArcX, outerArcY);
var pointB = Points.MetricPoint(outerArcX, outerArcY);
var pointC = Points.MetricPoint(innerArcX, innerArcY);
var pointD = Points.MetricPoint(-innerArcX, innerArcY);
var slotPath = Paths.CutPath();
var leftEndCap = MakeEndCap(-innerArcX, innerArcY, -outerArcX, outerArcY);
var rightEndCap = MakeEndCap(outerArcX, outerArcY, innerArcX, innerArcY);
slotPath.PathData.Add(new SvgMoveToSegment(pointA));
slotPath.PathData.Add(Arcs.SimpleSegment(pointA, outerArcRadius, SvgArcSweep.Positive, pointB));
slotPath.PathData.Add(Arcs.SimpleSegment(pointB, endCapRadius, SvgArcSweep.Positive, pointC));
slotPath.PathData.Add(Arcs.SimpleSegment(pointC, innerArcRadius, SvgArcSweep.Negative, pointD)); // Negative makes the lower arc path back "into" the body of the shape
slotPath.PathData.Add(Arcs.SimpleSegment(pointD, endCapRadius, SvgArcSweep.Positive, pointA));
return(slotPath);
}
private SvgGroup CreateAngleText()
{
var group = new SvgGroup();
var majorAngleIncrement = (float)totalProtractorAngleSweep / majorDivisions;
for (int i = 0; i <= majorDivisions; i++)
{
// The angle from the horizontal, used for positioning each label
var a = startAngle + i * majorAngleIncrement;
// this is the angle from the vertical. The graduation mark function uses the angle from the horizontal.
// the letters start rotated left -60
var textRotation = -90 + a;
// go from -n to n
var number = -totalProtractorAngleSweep / 2 + i * majorAngleIncrement;
var label = Text.EtchedText(number.ToString("#0"), textHeight);
float x = -textBaselineRadius *DegreeTrig.Cos(a);
float y = -textBaselineRadius *DegreeTrig.Sin(a);
label.Transforms.Add(new SvgTranslate(x.Px(), y.Px()));
label.Transforms.Add(new SvgRotate(textRotation));
group.Children.Add(label);
}
return(group);
}
private SvgGroup CreateAngleMarks()
{
var group = new SvgGroup();
var minorIncrement = (float)totalProtractorAngleSweep / (minorDivisions * majorDivisions);
var doMidPoint = minorDivisions % 2 == 0;
// Spin through the minor divisions selecting the length of the line as we go
for (int i = 0; i <= majorDivisions * minorDivisions; ++i)
{
var a = startAngle + i * minorIncrement;
float lineLength;
if (i % minorDivisions == 0) // 0, 10, 20 should draw major lines
{
lineLength = majorDivisionLength; // major
}
else if (doMidPoint && i % (minorDivisions / 2) == 0)
{
lineLength = minorDivisionLength + 1.5f; // midpoint
}
else
{
lineLength = minorDivisionLength;
}
var l = Lines.EtchLine(
// all lines start on the edge and continue along their length
-bodyRadius * DegreeTrig.Cos(a),
-bodyRadius * DegreeTrig.Sin(a),
-(bodyRadius - lineLength) * DegreeTrig.Cos(a),
-(bodyRadius - lineLength) * DegreeTrig.Sin(a));
group.Children.Add(l);
}
return(group);
}
