private static CanvasGeometry CreateStarCore(ICanvasResourceCreator resourceCreator, int points, float innerRadius, Matrix3x2 oneMatrix)
{
float rotation = TransformerGeometry.StartingRotation;
float angle = FanKit.Math.Pi / points;
Vector2[] array = new Vector2[points * 2];
for (int i = 0; i < points; i++)
{
int index = i * 2;
// Outer
Vector2 outer = TransformerGeometry.GetRotationVector(rotation);
Vector2 outerTransform = Vector2.Transform(outer, oneMatrix);
array[index] = outerTransform;
rotation += angle;
// Inner
Vector2 inner = TransformerGeometry.GetRotationVector(rotation);
Vector2 inner2 = inner * innerRadius;
Vector2 inner2Transform = Vector2.Transform(inner2, oneMatrix);
array[index + 1] = inner2Transform;
rotation += angle;
}
return(CanvasGeometry.CreatePolygon(resourceCreator, array));
}
private static CanvasGeometry CreateCookieCore(ICanvasResourceCreator resourceCreator, Matrix3x2 oneMatrix, float innerRadius, float sweepAngle)
{
// start tooth
Vector2 startTooth = new Vector2(1, 0);
// end tooth
Vector2 endTooth = TransformerGeometry.GetRotationVector(sweepAngle);
CanvasPathBuilder pathBuilder = new CanvasPathBuilder(resourceCreator);
CanvasArcSize canvasArcSize = (sweepAngle < System.Math.PI) ? CanvasArcSize.Large : CanvasArcSize.Small;
{
// DonutAndCookie
// start notch
Vector2 startNotch = startTooth * innerRadius;
// end notch
Vector2 endNotch = endTooth * innerRadius;
// start tooth point
pathBuilder.BeginFigure(startNotch);
// start notch point
pathBuilder.AddArc(endNotch, innerRadius, innerRadius, sweepAngle, CanvasSweepDirection.CounterClockwise, canvasArcSize);
}
// end notch point
pathBuilder.AddLine(endTooth);
// end tooth point
pathBuilder.AddArc(startTooth, 1, 1, sweepAngle, CanvasSweepDirection.Clockwise, canvasArcSize);
pathBuilder.EndFigure(CanvasFigureLoop.Closed);
return(CanvasGeometry.CreatePath(pathBuilder).Transform(oneMatrix));
}