graphics

问题 As a follow on to my previous question I have gotten my region but spent the last two hours trying to display tiny pictures wihing that region alone; with the end goal being to be able to arbitarily display any number of images I choose. so far this is my code: void OnPaintRadar(Object sender, PaintEventArgs e) { Graphics g = e.Graphics; Bitmap blip = new Bitmap(tst_Graphics.Properties.Resources.dogtag); Rectangle radar_rect = new Rectangle(myRadarBox.Left + 80, myRadarBox.Left + 7,

问题 It took me >1 day and I still haven't figured out why. I'm using Ubuntu 9.10, trying to make a simple OpenGL to work in c++. whenever I used GLUT_SINGLE parameter, it gives me a full black screen. I had to click mouse randomly on that screen in order to get out. This is so much annoying. Possibly a bug. Can anybody help? Here is the code that I use, drawing a simple triangle in c++: #include <GL/glut.h> #include <GL/gl.h> #include <GL/glu.h> void myDisplay() { glClear(GL_COLOR_BUFFER_BIT);

问题 I have a dot file generated by a software called egypt. The dot file contains many nodes and edges. If I use this dot file to draw a picture, it is very hard see the picture clearly as there are too many nodes. And what I need is only a subgraph starting from a node, and I don't need the whole picture. Is there any way to draw a subgraph from a specified node (such as start_node) using this dot file? 来源： https://stackoverflow.com/questions/46462155/how-to-extract-a-subgraph-from-a-dot-file

问题 Actually there are some similar questions about this topic but I couldn't see the answer what I am looking for. For example I have drawn 2 lines on windows form and I want to delete one of them and keep the other , how can I do that? this.Invalidate(); or Graphics.Clear(); clear all the form, I don't want this, I want to delete specific line . Do you have any other solutions? 回答1: The following will delete the all created lines in reverse chronological sequence. Graphics g; Pen p; Bitmap bmp;

问题 I am trying to add a title string below a png image. The problem is that there is no space for the text and I have to add some white space. Im not sure how to do this. This is what I have done so far: BufferedImage image = ImageIO.read(new File("output.png")); Graphics g = image.getGraphics(); g.setFont(g.getFont().deriveFont(30f)); g.setColor(Color.BLACK); g.drawString("Hello World!", 100, 350); g.dispose(); ImageIO.write(image, "png", new File("test.png")); 回答1: Why not simply add the

问题 I need to sync trackball controls and camera with the directional light. My case scenario: Init an empty scene with camera, lights and controls. Load a bufferGeometry obj, get its centroid and set camera and controls position and target relative to the obj centroid. Basically I simply set camera position and controls.target with: camera.lookAt( position ); camera.position = position; controls.target.copy( position ); where position is a Three.Vector3 obj. Directional light has to sync

问题 I have several thousand d3 charts and my client wants to print them for a report. The client needs them in EPS. I have bought Illustrator to convert them but when I open the SVG file the formatting has disappeared. This holds even when I put the CSS into the html page itself and not externally. Is there any way I can turn CSS + SVG into an EPS? 回答1: I just tried this approach in my illustrator and it does honor the CSS declarations inside the <svg /> element. <svg xmlns="http://www.w3.org

问题 I'm following the sfml getting started guide for version 2 and codeblocks and did everything the tutorial told me to do : downloaded and unzipped the sdk added the path to the sfml headers and libraries linked the libraries graphics, window and system but the sample code doesnt work. I'm getting the error message that sfml-graphics-d-2.dll is missing. Compilation works, the window opens but remains black and this error pops up. Here's the link to the tutorial http://www.sfml-dev.org/tutorials

问题 I'm trying to combine several box plots across categories of different size. Here is an example illustrating problem: sysuse auto graph box mpg, by(rep78, rows(1)) name(g1, replace ) graph box mpg, by(foreign, rows(1)) name(g2, replace ) graph combine g1 g2 , ycom r(2) This gives me the following results. All works according to the manual so for but I have two problems with this output. Firstly - aesthetics. Personally, I think plot with the same width across rows would look better. Secondly,

问题 I have a top-level GUI class called SpacePotaters (subclass of JFrame) and I add a JPanel called panelViews (which uses the CardLayout layout manager) to its content pane. Among other things, I add a MainMenu object (subclass of JPanel) and a GameView object (subclass of JPanel) as cards to panelView. public SpacePotaters(){ super("Space Potaters"); Container content = getContentPane(); // initialize components gameView = new GameView(this); mainMenu = new MainMenu(this); leaderboard = new