/// <summary>
/// Draws circles that decrease in size to build a flower that is animated
/// </summary>
private void DrawEllipsesFlower(WriteableBitmap writeableBmp)
{
if (writeableBmp == null)
{
return;
}
// Init some size vars
int w = writeableBmp.PixelWidth - 2;
int h = writeableBmp.PixelHeight - 2;
// Wrap updates in a GetContext call, to prevent invalidation and nested locking/unlocking during this block
using (writeableBmp.GetBitmapContext())
{
// Increment frame counter
if (++frameCounter >= int.MaxValue || frameCounter < 1)
{
frameCounter = 1;
}
double s = Math.Sin(frameCounter * 0.01);
if (s < 0)
{
s *= -1;
}
// Clear
writeableBmp.Clear();
// Draw center circle
int xc = w >> 1;
int yc = h >> 1;
// Animate base size with sine
int r0 = (int)((w + h) * 0.07 * s) + 10;
System.Windows.Media.Imaging.Color color_brown = System.Windows.Media.Imaging.Color.FromArgb(
255, System.Drawing.Color.Brown.R, System.Drawing.Color.Brown.G, System.Drawing.Color.Brown.B);
writeableBmp.DrawEllipseCentered(xc, yc, r0, r0, color_brown);
// Draw outer circles
int dec = (int)((w + h) * 0.0045f);
int r = (int)((w + h) * 0.025f);
int offset = r0 + r;
for (int i = 1; i < 6 && r > 1; i++)
{
for (double f = 1; f < 7; f += 0.7)
{
// Calc postion based on unit circle
int xc2 = (int)(Math.Sin(frameCounter * 0.002 * i + f) * offset + xc);
int yc2 = (int)(Math.Cos(frameCounter * 0.002 * i + f) * offset + yc);
int col = (int)(0xFFFF0000 | (uint)(0x1A * i) << 8 | (uint)(0x20 * f));
writeableBmp.DrawEllipseCentered(xc2, yc2, r, r, col);
}
// Next ring
offset += r;
r -= dec;
offset += r;
}
// Invalidates on exit of using block
}
}
/// <summary>
/// Draws the different types of shapes.
/// </summary>
private void DrawStaticShapes(WriteableBitmap writeableBmp)
{
// HideShapeCountText();
if (writeableBmp != null)
{
// Wrap updates in a GetContext call, to prevent invalidation and nested locking/unlocking during this block
using (writeableBmp.GetBitmapContext())
{
// Init some size vars
int w = writeableBmp.PixelWidth;
int h = writeableBmp.PixelHeight;
int w3 = w / 3;
int h3 = h / 3;
int w6 = w3 >> 1;
int h6 = h3 >> 1;
int w12 = w6 >> 1;
int h12 = h6 >> 1;
// Clear
writeableBmp.Clear();
// Fill closed concave polygon
var p = new int[]
{
w12 >> 1, h12,
w6, h3 - (h12 >> 1),
w3 - (w12 >> 1), h12,
w6 + w12, h12,
w6, h6 + h12,
w12, h12,
w12 >> 1, h12,
};
writeableBmp.FillPolygonsEvenOdd(new[] { p }, GetRandomColor());
// Fill closed convex polygon
p = new int[]
{
w3 + w6, h12 >> 1,
w3 + w6 + w12, h12,
w3 + w6 + w12, h6 + h12,
w3 + w6, h6 + h12 + (h12 >> 1),
w3 + w12, h6 + h12,
w3 + w12, h12,
w3 + w6, h12 >> 1,
};
writeableBmp.FillPolygon(p, GetRandomColor());
// Fill Triangle + Quad
writeableBmp.FillTriangle(2 * w3 + w6, h12 >> 1, 2 * w3 + w6 + w12, h6 + h12, 2 * w3 + w12, h6 + h12,
GetRandomColor());
writeableBmp.FillQuad(w6, h3 + (h12 >> 1), w6 + w12, h3 + h6, w6, h3 + h6 + h12 + (h12 >> 1), w12,
h3 + h6, GetRandomColor());
// Fill Ellipses
writeableBmp.FillEllipse(rand.Next(w3, w3 + w6), rand.Next(h3, h3 + h6), rand.Next(w3 + w6, 2 * w3),
rand.Next(h3 + h6, 2 * h3), GetRandomColor());
writeableBmp.FillEllipseCentered(2 * w3 + w6, h3 + h6, w12, h12, GetRandomColor());
// Fill closed Cardinal Spline curve
p = new int[]
{
w12 >> 1, 2 * h3 + h12,
w6, h - (h12 >> 1),
w3 - (w12 >> 1), 2 * h3 + h12,
w6 + w12, 2 * h3 + h12,
w6, 2 * h3 + (h12 >> 1),
w12, 2 * h3 + h12,
};
writeableBmp.FillCurveClosed(p, 0.5f, GetRandomColor());
// Fill closed Beziér curve
p = new int[]
{
w3 + w12, 2 * h3 + h6 + h12,
w3 + w6 + (w12 >> 1), 2 * h3,
w3 + w6 + w12 + (w12 >> 1), 2 * h3,
w3 + w6 + w12, 2 * h3 + h6 + h12,
};
writeableBmp.FillBeziers(p, GetRandomColor());
// Fill Rectangle
writeableBmp.FillRectangle(rand.Next(2 * w3, 2 * w3 + w6), rand.Next(2 * h3, 2 * h3 + h6),
rand.Next(2 * w3 + w6, w), rand.Next(2 * h3 + h6, h), GetRandomColor());
// Fill another rectangle with alpha blending
writeableBmp.FillRectangle(rand.Next(2 * w3, 2 * w3 + w6), rand.Next(2 * h3, 2 * h3 + h6),
rand.Next(2 * w3 + w6, w), rand.Next(2 * h3 + h6, h), GetRandomColor(), true);
System.Windows.Media.Imaging.Color black = System.Windows.Media.Imaging.Color.FromArgb(255, 0, 0, 0);
// Draw Grid
writeableBmp.DrawLine(0, h3, w, h3, Colors.Black);
writeableBmp.DrawLine(0, 2 * h3, w, 2 * h3, Colors.Black);
writeableBmp.DrawLine(w3, 0, w3, h, Colors.Black);
writeableBmp.DrawLine(2 * w3, 0, 2 * w3, h, Colors.Black);
// Invalidates on exit of Using block
}
}
}
