private void DrawBeziers()
{
if (points.Count > 3)
{
writeableBmp.DrawBeziers(GetPointArray(), Colors.Yellow);
}
}
private void DrawBeziers(WriteableBitmap writeableBmp)
{
if (points.Count > 3)
{
writeableBmp.DrawBeziers(GetPointArray(), Colors.Red);
}
}
/// <summary>
/// Draws a series of cubic Beziér splines each defined by start, end and two control points.
/// The ending point of the previous curve is used as starting point for the next.
/// Therfore the inital curve needs four points and the subsequent 3 (2 control and 1 end point).
/// </summary>
/// <param name="bmp">The WriteableBitmap.</param>
/// <param name="points">The points for the curve in x and y pairs, therefore the array is interpreted as (x1, y1, cx1, cy1, cx2, cy2, x2, y2, cx3, cx4 ..., xn, yn).</param>
/// <param name="color">The color for the spline.</param>
public static void DrawBeziers(this WriteableBitmap bmp, int[] points, Color color)
{
// Add one to use mul and cheap bit shift for multiplicaltion
int a = color.A + 1;
int col = (color.A << 24)
| ((byte)((color.R * a) >> 8) << 16)
| ((byte)((color.G * a) >> 8) << 8)
| ((byte)((color.B * a) >> 8));
bmp.DrawBeziers(points, col);
}
/// <summary>
/// Draws a series of cubic Beziér splines each defined by start, end and two control points.
/// The ending point of the previous curve is used as starting point for the next.
/// Therefore the initial curve needs four points and the subsequent 3 (2 control and 1 end point).
/// </summary>
/// <param name="bmp">The WriteableBitmap.</param>
/// <param name="points">The points for the curve in x and y pairs, therefore the array is interpreted as (x1, y1, cx1, cy1, cx2, cy2, x2, y2, cx3, cx4 ..., xn, yn).</param>
/// <param name="color">The color for the spline.</param>
public static void DrawBeziers(this WriteableBitmap bmp, int[] points, Color color)
{
var col = ConvertColor(color);
bmp.DrawBeziers(points, col);
}
