/// <inheritdoc/>
internal override void Flatten(Collections.ArrayList <Vector3> vertices, Collections.ArrayList <int> strokeIndices, Collections.ArrayList <int> fillIndices)
{
_arcSegment.IsLargeArc = true;
_arcSegment.Point1 = new Vector2F(RadiusX, 0);
_arcSegment.Point2 = _arcSegment.Point1;
_arcSegment.Radius = new Vector2F(RadiusX, RadiusY);
_arcSegment.RotationAngle = 0;
_arcSegment.SweepClockwise = false;
var tempVertices = ResourcePools <Vector2F> .Lists.Obtain();
_arcSegment.Flatten(tempVertices, MaxNumberOfIterations, Tolerance);
int numberOfVertices = tempVertices.Count;
if (numberOfVertices < 2)
{
return;
}
int startIndex = vertices.Count;
// Add 3D vertices. We skip the duplicated vertices.
for (int i = 0; i < numberOfVertices; i += 2)
{
vertices.Add(new Vector3(tempVertices[i].X, tempVertices[i].Y, 0));
}
// Add stroke indices.
for (int i = 0; i < numberOfVertices - 1; i++)
{
strokeIndices.Add(startIndex + (i + 1) / 2);
}
// Closing stroke:
strokeIndices.Add(startIndex);
if (IsFilled)
{
// Add a center vertex.
var centerIndex = vertices.Count;
vertices.Add(new Vector3(0, 0, 0));
// Add one triangle per circle segment.
for (int i = 0; i < numberOfVertices / 2 - 1; i++)
{
fillIndices.Add(centerIndex);
fillIndices.Add(startIndex + i + 1);
fillIndices.Add(startIndex + i);
}
// Last triangle:
fillIndices.Add(centerIndex);
fillIndices.Add(startIndex);
fillIndices.Add(centerIndex - 1);
}
ResourcePools <Vector2F> .Lists.Recycle(tempVertices);
}
public void Flatten()
{
var s = new ArcSegment2F
{
Point1 = new Vector2F(1, 2),
Point2 = new Vector2F(10, -3),
};
var points = new List<Vector2F>();
var tolerance = 1f;
s.Flatten(points, 10, tolerance);
Assert.IsTrue(Vector2F.AreNumericallyEqual(points[0], s.Point1));
Assert.IsTrue(Vector2F.AreNumericallyEqual(points.Last(), s.Point2));
var curveLength = s.GetLength(0, 1, 10, tolerance);
Assert.IsTrue(CurveHelper.GetLength(points) >= curveLength - tolerance * points.Count / 2);
Assert.IsTrue(CurveHelper.GetLength(points) <= curveLength);
}
public void Flatten()
{
var s = new ArcSegment2F
{
Point1 = new Vector2F(1, 2),
Point2 = new Vector2F(10, -3),
};
var points = new List <Vector2F>();
var tolerance = 1f;
s.Flatten(points, 10, tolerance);
Assert.IsTrue(Vector2F.AreNumericallyEqual(points[0], s.Point1));
Assert.IsTrue(Vector2F.AreNumericallyEqual(points.Last(), s.Point2));
var curveLength = s.GetLength(0, 1, 10, tolerance);
Assert.IsTrue(CurveHelper.GetLength(points) >= curveLength - tolerance * points.Count / 2);
Assert.IsTrue(CurveHelper.GetLength(points) <= curveLength);
}