async Task Canvas_CreateResourcesAsync(CanvasVirtualControl sender)
{
mandelbrotEffect = new PixelShaderEffect(await Utils.ReadAllBytes("Shaders/Mandelbrot.bin"));
// The Mandelbrot pixel shader outputs grayscale values. To make the result more interesting,
// we run it through a TableTransferEffect. This applies a color gradient that goes from black
// through blue, cyan, green, yellow, red, magenta, blue again, and finally back toward cyan.
colorizeEffect = new TableTransferEffect
{
Source = mandelbrotEffect,
RedTable = new float[] { 0, 0, 0, 0, 1, 1, 0.67f, 0, 0 },
GreenTable = new float[] { 0, 0, 1, 1, 1, 0, 0, 0, 0.5f },
BlueTable = new float[] { 0, 1, 1, 0, 0, 0, 1, 1, 1 },
};
}
async Task Canvas_CreateResourcesAsync(CanvasVirtualControl sender)
{
mandelbrotEffect = new PixelShaderEffect(await Utils.ReadAllBytes("Shaders/Mandelbrot.bin"));
// The Mandelbrot pixel shader outputs grayscale values. To make the result more interesting,
// we run it through a TableTransferEffect. This applies a color gradient that goes from black
// through blue, cyan, green, yellow, red, magenta, blue again, and finally back toward cyan.
colorizeEffect = new TableTransferEffect
{
Source = mandelbrotEffect,
RedTable = new float[] { 0, 0, 0, 0, 1, 1, 0.67f, 0, 0 },
GreenTable = new float[] { 0, 0, 1, 1, 1, 0, 0, 0, 0.5f },
BlueTable = new float[] { 0, 1, 1, 0, 0, 0, 1, 1, 1 },
};
}
private void CanvasAnimatedControl_OnCreateResources(CanvasAnimatedControl sender, CanvasCreateResourcesEventArgs args)
{
// blobs
_blobs = new List<Blob>();
var rnd = new Random();
for (int i = 0; i < BlobCount; i++)
{
_blobs.Add(new Blob
{
Position = new Vector2((float) (rnd.NextDouble()*sender.Size.Width), (float) (rnd.NextDouble()*sender.Size.Height)),
Velocity = new Vector2(BlobVelocityScale * (float) ((rnd.NextDouble()*3.0f) - 1.5f), BlobVelocityScale * (float) ((rnd.NextDouble()*3.0f) - 1.5f))
});
}
// texture
var rgb = new CanvasRadialGradientBrush(sender, new[]
{
new CanvasGradientStop
{
Color = Color.FromArgb(255, 128, 128, 255),
Position = 0.0f
},
new CanvasGradientStop
{
Color = Color.FromArgb(128, 128, 128, 255),
Position = 0.6f
},
new CanvasGradientStop
{
Color = Color.FromArgb(0, 128, 128, 255),
Position = 1.0f
}
});
rgb.RadiusX = rgb.RadiusY = BlobSize;
_blobBrush = rgb;
// table transfer table
ttt = new List<float>();
for (int i = 0; i < 100; i++)
{
ttt.Add(i < Threshold ? 0.0f : 1.0f);
}
// setup
_blobRenderTarget = new CanvasRenderTarget(sender, sender.Size);
_pre = new PremultiplyEffect {Source = _blobRenderTarget};
_tte = new TableTransferEffect {ClampOutput = true, Source = _pre};
_tte.AlphaTable = _tte.RedTable = _tte.GreenTable = _tte.BlueTable = ttt.ToArray();
_un = new UnPremultiplyEffect {Source = _tte};
_gbe = new GaussianBlurEffect {BlurAmount = 8.0f, Source = _un};
_mask = new CanvasImageBrush(sender) {SourceRectangle = new Rect(new Point(), sender.Size)};
}
