graphics2d

问题 So I'm making a game where you can put bombs on the location of your character. Each bomb is associated with a GIF image when the bomb is displayed and eventually go BOOM (think about Bomberman). The problem was, when i tried to paint more than one bomb on the screen, it was painted from the last frame of the GIF. Investigating, I found the method image.flush() to reset the GIF cicle but now the problem is that every time I paint a second bomb on the screen, the GIF cycle is reset for all

问题 I'm trying to write a small method which takes a BufferedImage image and a new width and height and scales the image keeping the aspect ratio by adding transparent border to the left/right or top/bottom depending on the image. The scaling works fine but for the life of me I can't get the border to be transparent. So far I have the following code posted on pastebin.com which does the scaling well. I've read a lot of manuals and other SO questions to no avail. I've tried numerous permutations

问题 I have a list of x,y points which printed,display an uneven peak curve line. The above image was generated by just painting the points on a java paint component. I used the following way to paint them on a paint component. g.drawline(pointX,pointY,pointX,pointY) Are there better ways to paint such wave line? I checked some of the similar questions,often they need to print a curve or peak,but my line is not always a peak as some times its flats out and other times they are bizarre. 回答1: The

问题 I have been working on trying to make this program work, even though I can't seem to find whatever is the problem. This program is made of the following 2 classes, no more, no less. It is basically supposed to draw a point on each click in the drawing zone, and on the 3rd click all points are connected. I still have to work on making it prettier and more accurate, but this part works. What doesn't work is what should follow : on the fourth click a thread should start (and it starts), and the

问题 Some of the Graphics2D methods, such as drawString , have versions that take coordinates as int or float . Are there any reasons to choose one over the other? Likewise, should I use the newer Shape classes, such as Rectangle2D (which use floating-point coordinates), or use Rectangle (which defines coordinates as int s)? 回答1: I see int and float - drawString(AttributedCharacterIterator iterator, float x, float y) Renders the text of the specified iterator, using the Graphics2D context's

问题 I'm new to Java graphics (computer graphics in general) and Stack Overflow, so please help me out and help me phrase my problem better. At the moment, I'm trying to display a BufferedImage alongside the original image in a Java GUI. This is my code: Image oriImage = robot.getQwerkController().getVideoStreamService().getFrame(); //load the original image Graphics2D hi = bufferedImage.createGraphics(); hi.drawImage(oriImage, 0,0, null); //draw the original image into the BufferedImage hi

问题 I'm trying to draw strings character by character to add lighting effects to shapes composed of text. while (i != line.length()) { c = line.substring(i, i + 1); cWidth = g.getFontMetrics().stringWidth(c); g.drawString(c, xx += cWidth, yy); i++; } The problem is, the width of a character isn't the actual distance it's drawn from another character when those two characters are printed as a string. Is there any way to get the correct distance in graphics2d? 回答1: The answer by Lukas Baran solves

问题 I am trying to approximate a solution of the Traveling Salesman Problem with a Hilbert Curve program. I have to do it by using an applet. How would I add the Matrix in my code, and how would I display the coordinates in the Applet. I don't need to have more than one frame. The code is below: import java.awt.*; import java.applet.*; // Background images (put a map in the back of the applet) public class HilbertCurve extends Applet{ private SimpleGraphics sg = null; private final int dist0=512;

问题 I have been trying to make a program in Java using Graphics2D and PaintComponent. However, Java is not rounding some values correctly resulting in a few points being rendered a pixel different from where it supposed to be which gives an unclean image. You can see what I mean in the picture below. Here is my code. What can I change to fix this? Thank you! public void paintComponent( Graphics g ) { super.paintComponent( g ); g.setColor(Color.red); int orginX = getWidth()/2; int orginY =

问题 I've just started working with java 2d graphics applications, on my studies repaint is redrawing our graphics wasting a lot of resources. but I want to know what repaint is, does and how to use it efficiently, thread safely and fast for many movable dynamic objects on my canvas? 回答1: I would start by having a read through Performing Custom Painting and Painting in AWT and Swing repaint makes a request to the RepaintManager to paint part or all of a component. The RepaintManager will decide