本文整理汇总了C#中BoundingBox.Clip方法的典型用法代码示例。如果您正苦于以下问题：C# BoundingBox.Clip方法的具体用法？C# BoundingBox.Clip怎么用？C# BoundingBox.Clip使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类BoundingBox的用法示例。
在下文中一共展示了BoundingBox.Clip方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Airbrush
/// <summary>
/// Paints on a WriteableBitmap with a stylized airbrush
/// </summary>
/// <param name="bmp">The bitmap to modify</param>
/// <param name="from">The starting point of the stroke</param>
/// <param name="to">The end point of the stroke</param>
/// <param name="color">The color of the stroke</param>
/// <param name="size">The size of the stroke</param>
public static unsafe void Airbrush(WriteableBitmap bmp, Point from, Point to, Color color, int size)
{
Random r = new Random();
if (bmp == null) return;
bmp.Lock();
// Create a line segment representation
MyLine line = new MyLine(from, to);
// Get a bounding box for the painted area
BoundingBox bitmapbounds = new BoundingBox();
BoundingBox linebounds = new BoundingBox();
bitmapbounds.AddPoint(0, 0, 0);
bitmapbounds.AddPoint(bmp.PixelWidth - 1, bmp.PixelHeight - 1, 0);
linebounds.AddPoint((int)from.X, (int)from.Y, size + AirbrushRadiu);
linebounds.AddPoint((int)to.X, (int)to.Y, size + AirbrushRadiu);
linebounds.Clip(bitmapbounds);
UInt32* start = (UInt32*)bmp.BackBuffer.ToPointer();
int stride = bmp.BackBufferStride / sizeof(UInt32);
// Move from 'from' to 'to' along timestep intervals, with one dot painted per interval
for (int i = 0; i < AirbrushDots; i++)
{
int x, y;
line.Interpolate(i, AirbrushDots, out x, out y);
int dist = r.Next() % size;
double angle = r.NextDouble() * 2 * Math.PI;
double dx = Math.Cos(angle) * dist;
double dy = Math.Sqrt(dist * dist - dx * dx);
if (angle > Math.PI) dy = -dy;
int bx = x + (int)dx;
int by = y + (int)dy;
BoundingBox dotbounds = new BoundingBox();
dotbounds.AddPoint(bx, by, AirbrushRadiu);
dotbounds.Clip(bitmapbounds);
for (int k = dotbounds.Top, row = 0; k < dotbounds.Bottom; k++, y++, row++)
for (int j = dotbounds.Left, col = 0; j < dotbounds.Right; j++, col++)
AlphaBlended(start + stride * k + j, Color.FromArgb(AirbrushBytes[row][col], color.R, color.G, color.B));
}
bmp.AddDirtyRect(new Int32Rect(linebounds.Left, linebounds.Top, linebounds.Width, linebounds.Height));
bmp.Unlock();
}示例2: Erase
/// <summary>
/// Erases paint on a WriteableBitmap
/// </summary>
/// <param name="bmp">The bitmap to modify</param>
/// <param name="from">The starting point of the stroke</param>
/// <param name="to">The end point of the stroke</param>
/// <param name="size">The stroke size</param>
public static unsafe void Erase(WriteableBitmap bmp, Point from, Point to, int size)
{
if (bmp == null) return;
bmp.Lock();
// Intermediate storage of the square of the size
int area = size * size;
// Create a line segment representation to compare distance to
MyLine line = new MyLine(from, to);
// Get a bounding box for the line segment
BoundingBox bitmapbounds = new BoundingBox();
BoundingBox linebounds = new BoundingBox();
bitmapbounds.AddPoint(0, 0, 0);
bitmapbounds.AddPoint(bmp.PixelWidth - 1, bmp.PixelHeight - 1, 0);
linebounds.AddPoint((int)from.X, (int)from.Y, size);
linebounds.AddPoint((int)to.X, (int)to.Y, size);
linebounds.Clip(bitmapbounds);
// Get a pointer to the back buffer (we use an int pointer here, since we can safely assume a 32-bit pixel format)
Int32* start = (Int32*)bmp.BackBuffer.ToPointer();
// Move the starting pixel to the x offset
start += linebounds.Left;
// Loop through the relevant portion of the image and figure out which pixels need to be erased
for (int y = linebounds.Top; y < linebounds.Bottom; y++)
{
Int32* pixel = start + bmp.BackBufferStride / sizeof(Int32) * y;
for (int x = linebounds.Left; x < linebounds.Right; x++)
{
if (line.DistanceSquared(x, y) <= area)
*pixel = 0;
// Move to the next pixel
pixel++;
}
}
bmp.AddDirtyRect(new Int32Rect(linebounds.Left, linebounds.Top, linebounds.Width, linebounds.Height));
bmp.Unlock();
}示例3: Brush
/// <summary>
/// Paints on a WriteableBitmap like a paintbrush
/// </summary>
/// <param name="bmp">The bitmap to modify</param>
/// <param name="from">The starting point of the stroke</param>
/// <param name="to">The end point of the stroke</param>
/// <param name="previous">The point prior to the 'from' point, or null</param>
/// <param name="color">The color of the brush</param>
/// <param name="size">The stroke size</param>
public static unsafe void Brush(WriteableBitmap bmp, Point from, Point to, Point? previous, Color color, int size)
{
if (bmp == null) return;
bmp.Lock();
// Intermediate storage of the square of the size
int area = size * size;
uint flatcolor = (uint)((int)color.A << 24) + (uint)((int)color.R << 16) + (uint)((int)color.G << 8) + color.B;
// Create a line segment representation to compare distance to
MyLine line = new MyLine(from, to);
// Get a bounding box for the line segment
BoundingBox bitmapbounds = new BoundingBox();
BoundingBox linebounds = new BoundingBox();
bitmapbounds.AddPoint(0, 0, 0);
bitmapbounds.AddPoint(bmp.PixelWidth - 1, bmp.PixelHeight - 1, 0);
linebounds.AddPoint((int)from.X, (int)from.Y, size);
linebounds.AddPoint((int)to.X, (int)to.Y, size);
linebounds.Clip(bitmapbounds);
// Get a pointer to the back buffer (we use an int pointer here, since we can safely assume a 32-bit pixel format)
UInt32* start = (UInt32*)bmp.BackBuffer.ToPointer();
// Move the starting pixel to the x offset
start += linebounds.Left;
if (previous.HasValue)
{
MyLine previoussegment = new MyLine(previous.Value, from);
// Loop through the relevant portion of the image and figure out which pixels need to be erased
for (int y = linebounds.Top; y < linebounds.Bottom; y++)
{
UInt32* pixel = start + bmp.BackBufferStride / sizeof(UInt32) * y;
for (int x = linebounds.Left; x < linebounds.Right; x++)
{
if (line.DistanceSquared(x, y) <= area && previoussegment.DistanceSquared(x, y) > area)
{
if (color.A == 255)
*pixel = flatcolor;
else
AlphaBlended(pixel, color);
}
// Move to the next pixel
pixel++;
}
}
}
else
{
// Loop through the relevant portion of the image and figure out which pixels need to be erased
for (int y = linebounds.Top; y < linebounds.Bottom; y++)
{
UInt32* pixel = start + bmp.BackBufferStride / sizeof(UInt32) * y;
for (int x = linebounds.Left; x < linebounds.Right; x++)
{
if (line.DistanceSquared(x, y) <= area)
{
if (color.A == 255)
*pixel = flatcolor;
else
AlphaBlended(pixel, color);
}
// Move to the next pixel
pixel++;
}
}
}
bmp.AddDirtyRect(new Int32Rect(linebounds.Left, linebounds.Top, linebounds.Width, linebounds.Height));
bmp.Unlock();
}