lines

问题 using the stickman example of http://fabricjs.com/, I have been trying to achieve moving the related circles when a line is moved. The code in the example is not well structured, heavy & with errors :), as I can not to move the the related circles symmetrically. If in the //move the other circle part is used next line obj.set({ 'left': (s.calcLinePoints().x1 + _l), 'top': ( -s.calcLinePoints().y1 + _t) }); the difference is in the sign of collected information for y1 and we move some

问题 I know there are various posts on stackoverflow about given two lines defined by two points each, being able to calculate the intersection, but typically those solutions extend the lines as opposed to treating their physical sizes. Background search: The typical function used to calculate the intersection of two lines as defined by points is shown below, but credit goes to here. // Finds the intersection of two lines, or returns false. // The lines are defined by (o1, p1) and (o2, p2). bool

问题 I have a 'key' file that looks like this (MyKeyFile): afdasdfa ghjdfghd wrtwertwt asdf (these are in a column, but I never figured out the formatting, sorry) I call these keys and they are identical to the first word of the lines that I want to extract from a 'source' file. So the source file (MySourceFile) would look something like this (again, bad formatting, but 1st column = the key, following columns = data): afdasdfa (several tab delimited columns) . . ghjdfghd ( several tab delimited

问题 I've got a problem with drawing lines in JavaFx. We're making an application simulating traffic - there are 16 streets, and every street has a different color dependent on traffic. There is a very simple picture: http://img546.imageshack.us/img546/9949/uliceu.jpg My first idea on how to do this was to draw streets as lines and simply change its colors. But I cant put a text on the line (I want a text with a street name). So I tried to put a line and a text on the StackPane. Then I added that

问题 I've got a problem with drawing lines in JavaFx. We're making an application simulating traffic - there are 16 streets, and every street has a different color dependent on traffic. There is a very simple picture: http://img546.imageshack.us/img546/9949/uliceu.jpg My first idea on how to do this was to draw streets as lines and simply change its colors. But I cant put a text on the line (I want a text with a street name). So I tried to put a line and a text on the StackPane. Then I added that

问题 I have a text file (more correctly, a “German style“ CSV file, i.e. semicolon-separated, decimal comma) which has a date and the value of a measurement on each line. There are stretches of faulty values which I want to remove before further work. I'd like to store these cuts in some script so that my corrections are documented and I can replay those corrections if necessary. The lines look like this: 28.01.2005 14:48:38;5,166 28.01.2005 14:50:38;2,916 28.01.2005 14:52:38;0,000 28.01.2005 14

问题 I have a text file (more correctly, a “German style“ CSV file, i.e. semicolon-separated, decimal comma) which has a date and the value of a measurement on each line. There are stretches of faulty values which I want to remove before further work. I'd like to store these cuts in some script so that my corrections are documented and I can replay those corrections if necessary. The lines look like this: 28.01.2005 14:48:38;5,166 28.01.2005 14:50:38;2,916 28.01.2005 14:52:38;0,000 28.01.2005 14

问题 Question, if I wanted to create gradient lines that fade out on the top and bottom, similar to the lines seen on AT&T's drop down menu that separate the menu items, how would I go about that? I want to create a similar effect on a menu that I am coding, and I would prefer not to use images. Is there a way to achieve this in CSS? Help much appreciated! Thanks. 回答1: Microsoft CSS Gradient is a GUI you can use. just copy the CSS into your code: Example: #div { /* IE10 Consumer Preview */

问题 I have the following code: glEnable(GL_POLYGON_OFFSET_LINE); glPolygonOffset(1,1); // or 40,40 etc... doesnt help at all But the lines are still z-fighting, is this common bug or something...? My lines are 1.0f thick and i draw the lines last in the scene. Also i have disable GL_ALPHA_TEST and GL_LINE_SMOOTH and enabled GL_BLEND and GL_COLOR_LOGIC_OP Edit: i have already tried GL_POLYGON_OFFSET_FILL, it doesnt help. 回答1: GL_POLYGON_OFFSET_LINE only works for polygon rendering with

问题 I am working on a university project which combines data science and GIS. We need to find an open-source solution capable of obtaining additional information from a massive GPS coordinates dataset. Clearly, I cannot use any API with daily request limit. THE DATA Here you can find a sample of the dataset the Professor provided us: longitude <- c(10.86361, 10.96062, 10.93032, 10.93103, 10.93212) latitude <- c(44.53355, 44.63234, 44.63470, 44.63634, 44.64559) longlat <- data.frame(longitude,