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问题 In my OpenGL app, it won't let me draw a line greater then ten pixels wide. Is there a way to make it draw more than ten pixels? void OGL_Renderer::drawLine(int x, int y, int x2, int y2, int r, int g, int b, int a, int line_width) { glColor4ub(r, g, b, a); glLineWidth((GLfloat)line_width); glBegin(GL_LINES); glVertex2i(x, y); glVertex2i(x2, y2); glEnd(); glLineWidth(1.0f); } 回答1: You could try drawing a quad. Make it as wide as you want your line to be long, and tall as the line width you

问题 I'm a beginner at this so just mind me if I ask anything obvious. I'm trying to install an apk to my device using adb install apk.apk however, the apk is around a few hundred MB big and it takes some time. Is there some sort of progress bar that I could implement in the command window to show the progress? I've seen stuff for adb push/pull . I'm not sure if it's the same. I'm running this in Windows 8.1 . I also have an adb environment variable set up. Thanks so much. 回答1: Well, adb install

问题 I'm writing a program which should allow the user to create a floor plan of a room - this means they can draw lines to represent walls etc. I am using a JPanel with Graphics 2D to do all the drawing stuff and currently I have a grid set as the background for the JPanel and I can draw lines based on the mouse movement(I have an enum for the mousestate with two states - DRAGGING and IDLE). However I want to add control points to the lines so that they can be moved around the JPanel once they

问题 I am having some troubles trying to connect separate points in my picture (see below). Right now, the code I have is as follows: first_time = resulting_coords[0:40] for i in range(len(first_time)): if(i < (len(first_time))-1): cv2.line(copy_test_image[0], (resulting_coords[i,0],resulting_coords[i,1]), (resulting_coords[i+1,0],resulting_coords[i+1,1]), (0,0,225), 2) elif(i>=(len(first_time))-1): # print(i) cv2.line(copy_test_image[0], (resulting_coords[i,0],resulting_coords[i,1]), (resulting

问题 Unless I've overlooked it, there isn't such an option in Xcode 4 preferences. Is there any way (extension, plugin, etc.) to achieve this visual feedback? Google search on "xcode 4 highlight current line" is in vain ... Or was there a deliberate omission of this (rudimentary) feature? Related question Also, if anybody can answer a question on (symbol) selection highlight, please do so. Installing CurrentLineHighlighter.dylib issue After executing these two $ defaults write /PATH/TO/Xcode.app

问题 I have an image and my aim is to get whole line which is shown with red line. I am working with matlab and I don't want to use IM2 = imdilate(IM,SE) function. Is there any function or method to do that? The image: Note: Sorry for bad red line. I drew it with paint. Edit: The original image is below: 回答1: Here's what I have after using imdilate at an intermediate step - %// Read in image and convert to a binary one im = imread('Line.jpg'); bw = im2bw(im); %// There seems to be a thin white

问题 I am writing an regression algorithm which tries to "capture" points inside boxes. The algorithm tries to keep the boxes as small as possible, so usually the edges/corners of the boxes go through points, which determines the size of the box. Problem: I need graphical output of the boxes in R. In 2D it is easy to draw boxes with segments() , which draws a line between two points. So, with 4 segments I can draw a box: plot(x,y,type="p") segments(x1,y1,x2,y2) I then tried both the scatterplot3d

问题 I am writing an regression algorithm which tries to "capture" points inside boxes. The algorithm tries to keep the boxes as small as possible, so usually the edges/corners of the boxes go through points, which determines the size of the box. Problem: I need graphical output of the boxes in R. In 2D it is easy to draw boxes with segments() , which draws a line between two points. So, with 4 segments I can draw a box: plot(x,y,type="p") segments(x1,y1,x2,y2) I then tried both the scatterplot3d

问题 I have created a function to search all double lines in a file. I use the "line-number"g/.*/d to delete the line. However I would like to confirm if a line has to be deleted or not, like the s/..//gc command Is it possible to delete a certain line with the global or substitute command and confirm every action? 回答1: Why not try a substitute command instead of the delete command? "line-number"s/^.*$\n//c 回答2: If I wanted to delete lines in a file and confirm each one, I would: search for the