https://istack.dev59.com/5QnEm.webp
我不确定是什么导致了“弯曲”。
用 GDI+ 创建位移图的代码(因为你可以快速设置像素)。 你可以在这里找到 LockBitmap。
static void DrawDisplacement(int width, int height, LockBitmap lbmp)
{
for (int x = 0; x < width; x++)
for (int y = 0; y < height; y++)
{
int roff = (int)((((width >> 1) - x) / (float)(width >> 1)) * ((height - y) / (float)height) * 127);
int goff = 0;
lbmp.SetPixel(x, y, Color.FromArgb(127 - roff, 127 - goff, 0));
}
}
//Scaling for fitting the image to the content
ICanvasImage scaledDisplacement = new Transform2DEffect
{
BorderMode = EffectBorderMode.Hard,
Source = displacementImage,
TransformMatrix = Matrix3x2.CreateScale((float) (sender.Size.Width / displacementImage.Bounds.Width), (float) (sender.Size.Height / displacementImage.Bounds.Height)),
Sharpness = 1f,
BufferPrecision = CanvasBufferPrecision.Precision32Float,
InterpolationMode = CanvasImageInterpolation.HighQualityCubic,
};
//Blurring, for a better result
ICanvasImage displacement = new GaussianBlurEffect
{
BorderMode = EffectBorderMode.Hard,
Source = scaledDisplacement,
BufferPrecision = CanvasBufferPrecision.Precision32Float,
BlurAmount = 2,
Optimization = EffectOptimization.Quality,
};
ICanvasImage graphicsEffect = new DisplacementMapEffect
{
Source = offscreen,
Displacement = displacement,
XChannelSelect = EffectChannelSelect.Red,
YChannelSelect = EffectChannelSelect.Green,
Amount = 800,//change for more or less displacement
BufferPrecision = CanvasBufferPrecision.Precision32Float,
};