2d

问题 Following is my Code for reference. One main image is display on Canvas. On that image with dataJSON object I am passing x and y co-ordinates and drawing ball images there. Then tooltip is added. (function tooltipFunc) But when I am panning image then tooltip is not visible on those balls images on hover.** In tooltipFunc function, if code is for default position when page loads first time. And else code is for translate positions when we are panning the image to show the tooltip. But after

问题 Using AndEngine for Android, I would like to have my scene look like this: The red box is the world which must be limited to a given size, say 2000px*450px . The blue box is the Camera , which is limited as well (as usual), for example to 750px*450px . For the whole scene, I have a background image that is exactly 450px high. So my Camera can be scaled to whatever size is appropriate, but the background must exactly fit to the height. The width of the Camera may be variable. The player

问题 Is it possible to use Physics 2D components(rigidbody2d,collider2d..etc) on 3d Game objects. I am planning develop 2 game with some of 3d model. Thanks! 回答1: It is not, however what you can do with rigidbody3d is lock the physics movement and rotation on it. For example, if you only ever wanted it to move along the x and y axis of your game, in the inspector just tick the freeze z movement box for the rigidbody component. 来源： https://stackoverflow.com/questions/27058919/apply-physics2d-to-3d

问题 First, refer to How to plot temporal frequency as a function of spatial frequency from a MATLAB FFT2 output of a time-space image? for a bit more of a background to this question. Assuming in the case of this sample signal:- n = [0:1024]; signal = sin(2*pi*n/10) + sin(2*pi*n/20) + sin(2*pi*n/30); N = 2048; %At least twice of the n value X = abs(fft(signal,N)); X = fftshift(X); %normalise data F = [-N/2:N/2-1]/N; %normalise data - shift it to the correct frequency plot(F,X); The variable F

问题 I'm trying to store a table in a 2d array so that each item in the array will be an array containing all the cells in a row. I'm using: var tRow = []; var tRows = []; tab = document.getElementById('table'); for(var r = 0 ; r < tab.rows.length ; r++) { for (var c=0; c < tab.rows[r].cells.length; c++){ tRow[c] = tab.rows[r].cells[c].innerHTML; } tRows.push(tRow); } this just gives me the last row item in 20 places rather than each item in the table at its respective index. So, for this table:

问题 I want to merge 1D arrays. How to change below AutoIt script to access elements as a newly generated 2D array? Test script is : #Include <Array.au3> Local $_arr1=["name1","addr1","phone1"] Local $_arr2=["name2","arr2","phone2"] _make2darray($_arr1,$_arr2) Func _make2darray($_arr1,$_arr2) Local $_2darray=[$_arr1,$_arr2] _ArrayDisplay($_2darray) _ArrayDisplay($_2darray[0]) _ArrayDisplay($_2darray[1]) ConsoleWrite($_2darray[0][0]) EndFunc $_2darray output is: Row | Col 0 [0] |{Array} [1] |{Array

问题 I am working on an OpenGL-based app that needs to be able to generate a changing set of textures on the fly. From my initial reading it sounds like it would be a really bad idea to use a separate texture for each image that I need to draw as the operation of binding a texture so that is can be used for rendering is really slow. The preferred approach would be to combine many of these needed images into a single bigger image and binding that texture once and drawing only excerpts from it

问题 The following code is my attempt at stopping the PC (player character) from walking through an NPC. The "if" statement checks if the two rectangles (BoundingBox) intersect. collisionBox defines the area of the overlapping BoundingBoxes moveDir defines the Vector change that the PC will be undergoing after the if statement (e.g: if moveDir=(2,0) the PC will move to the right two pixels) currentSpeed defines the value being assigned to moveDir.X or moveDir.Y depending on keyboard input (up,

问题 Please look at this peice of code :- #include<stdio.h> int main() { int arr[2][2]={1,2,3,4}; printf("%d %u %u",**arr,*arr,arr); return 0; } When i compiled and executed this program i got same value for arr and *arr which is the starting address of the 2 d array. For example:- 1 3214506 3214506 My question is why does dereferencing arr ( *arr ) does not print the value stored at the address contained in arr ? 回答1: *arr is type integer array of length 2, so it shares the same address as arr.

问题 I'm quite a beginner with c++, especially graphically related. I would like to make an animated background for my graphicsview which looks kind of like this: Gradient Field Airflow The picture represents the turbulence of an airflow over an object. The colors must be based on a matrix of values. I can only find how to do single-direction gradients with QT. How do I set this up? How do I get two-directional gradients? /*edit It has been pointed out well that technically speaking this is not a