static ImmutableArray <Point> getSegmentRatios(GetSegmentLength getSegmentLength, ImmutableArray <Vector3> nodes)
{
var builder = ImmutableArray.CreateBuilder <Point>(nodes.Length);
var length = 0f;
var lengthsCount = nodes.Length - 1;
var lengths = new float[lengthsCount];
for (var idx = 0; idx < lengthsCount; idx++)
{
var segLength = getSegmentLength(idx);
length += segLength;
lengths[idx] = segLength;
}
// Creating points
builder.Add(new Point(nodes[0], 0f, 0f));
for (var idx = 1; idx < nodes.Length; idx++)
{
var previousNodeLength = lengths[idx - 1];
var previousPoint = builder[idx - 1];
builder.Add(new Point(
point: nodes[idx],
percentageOfPathTraveled: previousNodeLength / length + previousPoint.percentageOfPathTraveled,
realDistanceToThisPoint: previousNodeLength + previousPoint.realDistanceToThisPoint
));
}
return(builder.MoveToImmutable());
}
private void CreateCanvasGeometry(CanvasVirtualControl device)
{
switch (GeometryType)
{
case GeometryType.Rectangle:
_geometry = CanvasGeometry.CreateRectangle(device, (float)Points[0].X, (float)Points[0].Y,
(float)Points[1].X - (float)Points[0].X, (float)Points[1].Y - (float)Points[0].Y);
break;
case GeometryType.Line:
_geometry = CanvasGeometry.CreatePolygon(device,
new Vector2[]
{
new Vector2((float)Points[0].X, (float)Points[0].Y),
new Vector2((float)Points[1].X, (float)Points[1].Y)
});
break;
case GeometryType.Circle:
_geometry = CanvasGeometry.CreateCircle(device, new Vector2((float)Points[0].X, (float)Points[0].Y), GetSegmentLength.CalculateSegmentLength(Points[0], Points[1]));
break;
}
}
private CanvasGeometry CreateCanvasGeometry(CanvasVirtualControl device)
{
switch (GeometryType)
{
case GeometryType.Rectangle:
return(CanvasGeometry.CreateRectangle(device, (float)Points[0].X, (float)Points[0].Y,
(float)MapController.Instance.MousePosition.X - (float)Points[0].X, (float)MapController.Instance.MousePosition.Y - (float)Points[0].Y));
case GeometryType.Line:
CanvasPathBuilder pathBuilder = new CanvasPathBuilder(device);
pathBuilder.SetSegmentOptions(CanvasFigureSegmentOptions.ForceRoundLineJoin);
pathBuilder.BeginFigure((float)Points[0].X, (float)Points[0].Y);
pathBuilder.AddLine(new Vector2((float)MapController.Instance.MousePosition.X, (float)MapController.Instance.MousePosition.Y));
pathBuilder.EndFigure(CanvasFigureLoop.Open);
return(CanvasGeometry.CreatePath(pathBuilder));
case GeometryType.Circle:
return(CanvasGeometry.CreateCircle(device, new Vector2((float)Points[0].X, (float)Points[0].Y), GetSegmentLength.CalculateSegmentLength(Points[0], MapController.Instance.MousePosition)));
}
return(null);
}
