line

I have a Canvas on which I draw lines (via Lines or Paths) that indicates a road to follow for users. Is there a way to change the line so that it displays a repetitive image instead? What I'm looking for is to have a step icon (png with transparency) instead of a straight line. Thanks! Fredrik Hedblad This will draw a repeated image as Stroke for a Path . Laborate with the values of Viewport to achieve what you're looking for <Path StrokeThickness="10" Data="M 10,10 100,10" Stretch="Fill"> <Path.Stroke> <ImageBrush ImageSource="C:\arrow.gif" Viewport="0,0,0.1,1" TileMode="Tile"/> </Path

I have searched throughout the Internet and found hundreds of implementation of Bresenham's line drawing algorithm. But, one thing I found strange is, only two or three of them can cover all of the eight octets. still, they are being used in many applications. For example, this lady implemented this version (line 415) of Bresenham's algorithm. But, it doesn't cover the whole 360 degrees. This guy here seems to be developing a library. But still it doesn't work properly. Can you tell me why? This guy's implementation works fine. But, I suppose it is not Bresenham's Algorithm. It has a very few

Given: A Set (for the sake of discussion we will call it S ), which is an unordered collection of line segments. Each line segment is defined as two Longitude-Latitude end-points. While all of the line segments follow an implied curve, there are "gaps" between each of the segments, of various sizes. We refer to this curve as "implied" because it is not explicitly defined anywhere. The only information that we have available are the line segments contained within S . Desired Result: A sequence (for the sake of discussion we will call it R ), which is an ordered collection of line segments. Each

增加：利用写，增加文件内容 删除：将文件打开方式变为‘w’'w+'来删除全部文件内容。也可以通过截断函数truncate()删除需要删除的部分 修改：（1）可以将文件全部加载在内存中，在写到原文件。 此方法一般不采用，常用方法是（2） （2）打开文件，修改完后写到一个新文件中。即可同时打开两个文件，从一个文件读往另一个文件写。 eg:将poem1文件中的eeeee改为EEEEE f= open ( "poem1" , 'r' , encoding = "utf-8" ) f_new= open ( "poem3" , 'w' , encoding = "utf-8" ) for line in f: if "eeeee" in line: line=line.replace( "eeeee" , "EEEEE" ) f_new.write(line) f.close() f_new.close() 查：通过for循环查找 如上例查找字符串‘eeeee’ 来源： CSDN 作者： 风从北方来 链接： https://blog.csdn.net/beifangdefengchuilai/article/details/79592849

Using the data below, notice the legend does not properly describe geom_hline: df<-data.frame( points=c(.153,.144,.126,.035, .037, .039, .010,.015,.07), days=gl(3,1,9,labels=c("Sun","Mon","Tues")), lang=c("en","en","en","pt","pt","pt","ko","ko","ko")) ggplot(data=df[df$lang=="en",])+ geom_point(aes(x=days,y=points),size=5,colour='cyan',show_guide=F)+ geom_point(aes(x=days,y=points,colour=days),size=4,show_guide=F)+ facet_wrap(~lang,ncol=1,scales="free")+ xlab("")+ ylab("")+ scale_y_continuous(labels = percent_format())+ theme(legend.position="right", legend.title = element_blank(), strip.text

The issue of programmatically drawing lines using XNA has been covered here . However, I want to allow a user to draw on a canvas as one would with a drawing app such as MS Paint. This of course requires each x and/or y coordinate change in the mouse pointer position to result in another "dot" of the line being drawn on the canvas in the crayon color in real time. In the mouse move event, what XNA API considerations come into play in order to draw the line point by point? Literally, of course, I'm not drawing a line as such, but rather a sequence of "dots". Each "dot" can, and probably should,

How line can be represented using Boost Geometry? I don't need finite segment, but I need infinite lines (maybe Segment or Linestring can be extended?) As I understand I can use boost::geometry::intersects , but I don't know how to define infinite line. If you want to test whether an infinite line A intersects a line segment B , this can be done using boost::geometry::strategy::side::side_by_triangle : template <typename Point> struct line { boost::geometry::model::segment<Point> segment; }; template <typename Point> bool intersects(line<Point> const& A, boost::geometry::model::segment<Point>