2d intro

we need to control the movement of the rigidbody2d by transform, which is often set in the script. Note When the gravity scale is set to 0 o'clock, the rigidbody is no longer affected by gravity.Meet Collider2dYou can add a collider with the following three types of collider in the Add Component option by tapping collider2d in physics2d: boxcollider2d: Box-shaped collider, usually rectangular. CIRCLECOLLIDER2D: Round Collider. POLYGONCOLLIDER2D: Polygon Collider When

Recently found a paper comparison of the current Ros under the 2D laser Slam open source code effect comparison:For more information, see article: An evaluation of 2D SLAM techniques available in robot operating system1. Algorithm IntroductionA. HectorslamScan-matching (Gaussian-newton equation) + High sensor requirementsRequirements: High update frequency small measurement noise of the laser scanner. There

Range Sum query-immutableGiven an integer array nums, find the sum of the elements between indices I and J (i ≤ J), inclusive.Example:Given nums = [-2, 0, 3, -5, 2, -1]sumrange (0, 2), 1sumRange (2, 5), -1sumrange (0, 5), 3Note: Assume that the array does is not a change. There is many calls to sumrange function. 1 classNumarray {2 Private:3vectorint>acc;4 5 Public:6Numarray (vectorint> nums) {7Acc.push_back (0);8 for(Auto n:nums) {9Acc.push_back (Acc.back () +n);

The original title link is here: https://leetcode.com/problems/search-a-2d-matrix-ii/The search a 2D matrix is very similar to the title, but the content is very different.The point is that each row of each column is ascending, starting at the top right corner x = matrix[i][j], i = 0, j = matrix[0].length-1, and with X and target, if equal, returns True.If it is less than target, the description is definite

The original title link is here: https://leetcode.com/problems/search-a-2d-matrix/Reference this article: http://www.cnblogs.com/springfor/p/3857959.htmlCan be treated as a one-dimensional matrix, but the crux of the problem is how to convert the matrix m*n to 1 D, and then use the two-point lookup method to solve problems.The focus of the transformation is on the location of each point, and in the matrix representation we are accustomed to using (I,J

Implement a iterator to flatten a 2d vector.For example, Given 2d vector =[ [1,2], [3], [4,5,6]] By calling next repeatedly until Hasnext returns false, the order of elements returned by next should is: [1,2,3,4,5,6] .Analysis: 1190000003791233An array is used to represent the iterator for each list, and then a variable is recorded to indicate that the first iterator is currently used.1 Public classvect

The global Hand tour industry will exceed $25 billion, more and more developers are beginning to enter the field of research and development, and as a rookie, many times, if there is no other developer's advice, will go a lot of detours. When you start to enter the field of game development, it is difficult to know what tools to choose, what programming language and which frameworks, you will face a lot of choices and suggestions, so here to provide some experience, hope to do hand-tour of the n

) Parameters: Div{transform:skew (30deg,20deg),-ms-transform:skew (30DEG,20DEG); /* IE 9 */-webkit-transform:skew (30deg,20deg); /* Safari and Chrome */-o-transform:skew (30DEG,20DEG); /* Opera */-moz-transform:skew (30deg,20deg); /* Firefox */}matrix () method The Matrix () method combines all 2D conversion methods. The matrix () method requires six parameters, including mathematical functions that allow you to: rotate, scale, move, and skew el

　　Recently in the company's Internal Technology Association forum, when wandering, inadvertently found a hand Amoy front-end big Nuetzen two years ago wrote a blog, about the canvas 2d mapping technology. It feels pretty magical after seeing it. So I realized it for a moment. But Zenghan predecessors of that blog is just about the realization of the idea, the whole logic or their own slowly groping out, the process is very sad, so here to record and s

Search a 2D MatrixTotal Accepted: 35062 Total Submissions: 111591 Write an efficient algorithm, searches for a value in a m x n Matrix. This matrix has the following properties: Integers in each row is sorted from the left to the right. The first integer of each row was greater than the last integer of the previous row. For example,Consider the following matrix:[ [1, 3, 5, 7], [Ten, One,], [23, 30, 34, 50]]Given Target = 3 , r

The global Hand tour industry will exceed $25 billion, more and more developers are beginning to enter the field of research and development, and as a rookie, many times, if there is no other developer's advice, will go a lot of detours. When you start to enter the field of game development, it is difficult to know what tools to choose, what programming language and which frameworks, you will face a lot of choices and suggestions, so here to provide some experience, hope to do hand-tour of the n

; Code snippet. Private void TintThePicture (int deg ){ Int [] pix = new int [picw * pich]; MBitmap. getPixels (pix, 0, picw, 0, 0, picw, pich ); Int RY, GY, BY, RYY, GYY, BYY, R, G, B, Y; Double angle = (3.14159d * (double) deg)/180.0d; Int S = (int) (256.0d * Math. sin (angle )); Int C = (int) (256.0d * Math. cos (angle )); For (int y = 0; y For (int x = 0; x { Int index = y * picw + x; Int r = (pix [index]> 16) 0xff; Int g = (pix [index]> 8) 0xff; Int B = pix [index] 0xff; RY = (70 * r-

Document directory Step 1: declare a pointer to the allegro_ustr type Step 2: Create a string for a UTF-16 Step 3: render a string Step 4: destroy the resources occupied by the string at the end This series of articles is written by Sky. For more information, see the source. Http://blog.csdn.net/qq573011406/article/details/8263966 Author: Yuan quanwei mail: qq573011406@126.com welcome mail exchange programming experience Index of this series of tutorials:Tutorial series of

In the second article of this series, we explained how to initialize the d3d rendering device !!! I admit that I am an irresponsible blogger, and I have not written anything in detail at all, hum !! (Proud ?) However, I think it is better to look at the d3d SDK documentation than reading the author's articles. That is the best teaching material. Okay, in this third article, the blogger is going to talk about how to use d3d for 2D plotting. As we all k

There are three main methods: Core animation, core graphic, and OpenGL ES. Ease of operation: Ca> CG> OpenGL Performance and functionality: OpenGL> CG> Ca 1. Core Animation Non-entertainment software uses animations, which is easy to operate. 2. Quartz 2D drawing Is a 2D drawing engine. (1) The drawing context is the target object of a drawing. It defines the basic attributes of the drawing, such as color,

Agg ry, a powerful 2D ry library. Due to some defects of GDI + (not cross-platform, poor accuracy in some application scenarios), I have been looking for a solution that can replace the GDI + drawing component, and finally I chose idea, it provides sub-pixel precision display, superb anti-sawtooth effect, cross-platform, and exquisite code for embedded development. There are many components related to the 2D