graphics

问题 This question is about a graphics application using OpenGL. (At the time I am using the framework GLFW but I consider changing it.) My aim is to let the user (as much as possible) continuously switch between fullscreen mode and windowed mode. This procedure should take less than a second and can occur during runtime. For example see the game Minecraft where the user can toggle fullscreen with virtually no delay. The window recreation process doesn't take so much time. But the problem is, that

问题 I've noticed that a number of top universities are offering courses where students are taught subjects relating to Computer Graphics for their CS majors. Sadly this is something not offered by my university and something I would really like to get into sometime in the next couple of years. A couple of the projects I've found from some universities are great, although I'm mostly interested in two things: Raytracing: I want to write a Raytracer within the next two years. What do I need to know?

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I see a lot of GD tutorials for PHP, even though GD was written in C, not PHP. Could you please suggest any good tutorial for GD in C? 回答1: A bit of googling turned up nothing for me either - this is one of those things, for now anyway, that you must study the API reference and make up your own toy test programs

问题 Here is my question: #data 1: lab1 <- 1:10 group <- rep(1:3, each = length (lab1)) label <- rep(lab1, 3) avar <- rep(c(0, 1, 4, 5, 6, 8, 10, 11, 12, 13), 3) myd <- data.frame (group, label, avar) # data 2 fillcol <- rep(rnorm(length(lab1)-1, 0.5, 0.2), 3) group1 <- rep(1:3, each = length(fillcol)/3) # this variable will be used to fill color in bars filld <- data.frame(group1, fillcol) # now plotting par(mfrow = c(3, 1)) par(mar = c(2.5, 1, 2.5, 1)) #plot1 myd1 <- myd[myd$group ==1,] filld1 <

问题 I would like to get the color range of the specific color for generating tag cloud. Say that user has entered some color with RGB/HHHHHH values then I would like to write a function f(color, no) which returns RGB/HHHHHH for "no" of different shades from dark to light colors for specified "color". These colors then will be useful to display the different tags with different color of same shade. But I would like to avoid black and white shades in it. Following is example of F({R:0, G:0, B:255},

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I stumbled upon this site http://www.swell3d.com/ and I think that in the future we will have a new hype word "3d website" that is used heavily in marketing. However, what I am interested in is how to create such designs/layouts? How is that funny-looking effect actually applied -- and are there any w3 specs

问题 i want blur a image,i used : public Bitmap mohu(Bitmap bmpOriginal,int hRadius,int vRadius) { int width, height, r,g, b, c,a, gry,c1,a1,r1,g1,b1,red,green,blue; height = bmpOriginal.getHeight(); width = bmpOriginal.getWidth(); int iterations = 5; int[] inPixels = new int[width*height]; int[] outPixels = new int[width*height]; Bitmap bmpSephia = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); Canvas canvas = new Canvas(bmpSephia); Paint paint = new Paint(); int i=0; canvas

问题 Using a new empty .rmd document, this code works:  \begin{center} \includegraphics[width=4in]{RainbowDolphin.png} \end{center} But without the first line, it doesn't: \begin{center} \includegraphics[width=4in]{RainbowDolphin.png} \end{center} I get an error: ! Undefined control sequence. l.71 \includegraphics pandoc.exe: Error producing PDF from TeX source Error: pandoc document conversion failed with error 43 In addition: Warning message: running command '"C:/Program

问题 Hei. Are making a game and are looking for a ray intersection onto a square or a rectangle only in 3D space. Have search the web and found many solutions but nothing i can understand have a line and line segment intersection script in 2D but i cant figure out have to make it 3D. It is not important from what side it intersect the square or rectangle but it must be able to retrive the point of intersection vector so that later can be tested for distance to se if it occurred before or after

问题 QT4 How to blur QPixmap image? I am looking for something like one of the following: Blur(pixmap); painter.Blur(); painter.Blur(rect); What is the best way to do this? 回答1: 1st) declare external QT routine: QT_BEGIN_NAMESPACE extern Q_WIDGETS_EXPORT void qt_blurImage( QPainter *p, QImage &blurImage, qreal radius, bool quality, bool alphaOnly, int transposed = 0 ); QT_END_NAMESPACE 2nd) Use: extern QImage srcImg;//source image QPixmap pxDst( srcImg.size() );//blurred destination pxDst.fill( Qt