private static void DrawArrow(
GeometrySink sink,
ReadOnlySpan <ImmutableVec2_float> bezier,
float arrowSize)
{
var b1X = BiaNodeEditorHelper.Bezier(bezier[0].X, bezier[1].X, bezier[2].X, bezier[3].X, 0.5001f);
var b1Y = BiaNodeEditorHelper.Bezier(bezier[0].Y, bezier[1].Y, bezier[2].Y, bezier[3].Y, 0.5001f);
var b2X = BiaNodeEditorHelper.Bezier(bezier[0].X, bezier[1].X, bezier[2].X, bezier[3].X, 0.5f);
var b2Y = BiaNodeEditorHelper.Bezier(bezier[0].Y, bezier[1].Y, bezier[2].Y, bezier[3].Y, 0.5f);
var sx = b1X - b2X;
var sy = b1Y - b2Y;
var r = MathF.Atan2(sy, sx) + MathF.PI * 0.5f;
var m = (MathF.Sin(r), MathF.Cos(r));
var l1 = new ImmutableVec2_float(arrowSize / 1.732f, arrowSize / 1.732f * 2.0f);
var l2 = new ImmutableVec2_float(-arrowSize / 1.732f, arrowSize / 1.732f * 2.0f);
var t1X = (bezier[0].X + bezier[3].X) * 0.5f;
var t1Y = (bezier[0].Y + bezier[3].Y) * 0.5f;
var t2 = Rotate(m, l1);
var t3 = Rotate(m, l2);
sink.BeginFigure(new RawVector2(t1X, t1Y), FigureBegin.Filled);
sink.AddLine(new RawVector2(t2.X + t1X, t2.Y + t1Y));
sink.AddLine(new RawVector2(t3.X + t1X, t3.Y + t1Y));
sink.EndFigure(FigureEnd.Closed);
}
public void Setup()
{
var r = new Random();
Data = new ImmutableVec2_float[4 * 1000000];
for (var i = 0; i != Data.Length; ++i)
{
Data[i] = new ImmutableVec2_float((float)r.NextDouble(), (float)r.NextDouble());
}
}
public static void MakeBezierCurve(this IBiaNodeLink self, Span <ImmutableVec2_float> result)
{
var item1 = self.ItemSlot1.Item ?? throw new NullReferenceException();
var item2 = self.ItemSlot2.Item ?? throw new NullReferenceException();
var pos1 = item1.MakeSlotPosDefault(self.InternalData().Slot1 !);
var pos2 = item2.MakeSlotPosDefault(self.InternalData().Slot2 !);
var pos1C = BiaNodeEditorHelper.MakeBezierControlPoint(pos1, self.InternalData().Slot1 !.Dir);
var pos2C = BiaNodeEditorHelper.MakeBezierControlPoint(pos2, self.InternalData().Slot2 !.Dir);
result[0] = new ImmutableVec2_float((float)pos1.X, (float)pos1.Y);
result[1] = new ImmutableVec2_float((float)pos1C.X, (float)pos1C.Y);
result[2] = new ImmutableVec2_float((float)pos2C.X, (float)pos2C.Y);
result[3] = new ImmutableVec2_float((float)pos2.X, (float)pos2.Y);
}
