2d

How to find average of elements in 2d array JAVA? [closed]

由 白昼怎懂夜的黑 提交于 2019-12-02 23:45:11
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . I need help with the following program: "Write a method that will take a two-dimensional array of doubles as an input parameter & return the average of the elements of the array." Can anyone tell me how to go about it? My current code: public static double average(float arr[][]) {

How can i make a 2D array with existing lists?

由 对着背影说爱祢 提交于 2019-12-02 23:35:51
问题 for instance, i have a txt data called 'mazeline' like this: abcd cdae korp So i first made 3 lists: mazeline = readmaze.split() mline0 = list(mazeline[0]) mline1 = list(mazeline[1]) mline2 = list(mazeline[2]) So the 3 lists are: mline0 = [a,b,c,d] mline1 = [c,d,a,e] mline2 = [k,o,r,p] and i want to make a 2D array like this: [[a,b,c,d],[c,d,a,e],[k,o,r,p]] or is there any way that i can make a 2d array directly from the first data? any suggestions? any help would be good. 回答1: Just put the

2D orbital physics

由 ≯℡__Kan透↙ 提交于 2019-12-02 23:01:43
I'm working on a 2D physics engine for a game. I have gravity and masses working, using a simple iterative approach (that I know I'll have to upgrade eventually); I can push the masses around manually and watch them move and it all works as I'd expect. Right now I'm trying to set up the game world in advance with a satellite in a simple circular orbit around a planet. To do this I need to calculate the initial velocity vector of the satellite given the mass of the planet and the desired distance out; this should be trivial, but I cannot for the life of me get it working right. Standard physics

HTML5 Tile Engine

由 寵の児 提交于 2019-12-02 20:52:29
Where can I find a tile engine for HTML5 <canvas> , for writing 2D games? Possibly: http://www.effectgames.com/effect/ and in particular http://www.effectgames.com/effect/#Article/docs/Sprites_and_Tiles_Guide However note that effect is free to use but proprietary and not open source. Other Javascript/Canvas game engine libraries that would make it easy (but may not have specific tile support/documentation): http://github.com/kesiev/akihabara http://gamejs.org/ http://code.google.com/p/cakejs/ http://gamequery.onaluf.org/ Sites you might want to follow: Mozilla Labs Gaming Badass Javascript

Rotating objects in a grid (GUI, JAVA SWING)

由 醉酒当歌 提交于 2019-12-02 19:35:17
问题 Ok, so I am trying to do this tutorial: http://mathcs.slu.edu/~fritts/cse131/labs/lab9/index.html But I don't know how to rotate objects synchronized void moveDown() { } Is there any defined method for that or do I have to implement my own code? I thought about changing the shape of the object, but that would imply I have to change my current object every time, which might be a little complicated to implement. The method that calls moveDown: public void keyPressed(KeyEvent event) { int key =

XNA 2D vector angles - what's the correct way to calculate?

由 放肆的年华 提交于 2019-12-02 19:31:35
what is in XNA in 2D the standard way vector angles work ? 0 degrees points right, 90 points up, 180 left, 270 down ? What are the 'standard' implementations of float VectortoAngle(Vector2 vec) and Vector2 AngleToVector(float angle) so that VectortoAngle(AngleToVector(PI)) == PI ? To answer your first question, 0 degrees points up, 90 degrees points right, 180 degrees points down, and 270 degrees points left. Here is a simple 2D XNA rotation tutorial to give you more information. As for converting vectors to angles and back, I found a couple good implementations here : Vector2 AngleToVector

Java- How to add sum of a row in 2d array [closed]

由 断了今生、忘了曾经 提交于 2019-12-02 18:35:07
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 3 years ago . My problem is to add the sum of each row in a 2d array, and put those values in a new 1d array. This is my code public static int[] sumRow(int[][] N){ int[] rowSum = new int[N.length]; for(int i = 0; i<N.length;i++){ for(int j = 0; j<N[i].length; j++){ rowSum[i] = N[i][j] + N[i+1][j+1]; } } return rowSum; } But

.FillRectangle not drawing anything

由 久未见 提交于 2019-12-02 18:09:33
问题 I'm having trouble figuring out why .FillRectangle is not working for me. Furthermore, as it's not thorwing any exception, I ran out of ideas why it could be, so I need some help here:/ The part of the code affected is this try { using (FileStream fileStream = File.OpenRead(filePath)) { using (StreamReader streamReader = new StreamReader(fileStream, Encoding.UTF8, true, 1024)) { String line; int mW = Convert.ToInt32(Math.Round(this.Size.Width / 2d)); int mH = Convert.ToInt32(Math.Round(this

Draw a 2D Image using OpenGL ES 2.0

由 人盡茶涼 提交于 2019-12-02 17:34:43
I've been struggling to draw a 2D image from jpg/png files using openGL ES 2.0 for Android. Everywhere I look the tutorials are for texturing 3D images so its been rough figuring out how to draw a regular 2D Sprite. I got a square to draw and rotate but once it came to texturing I must have messed up somewhere because I keep getting an error saying DrawElements isn't bound to any data but if I comment out any code to do with texturing it works fine. Any help would be greatly appreciated. Here is my Code for my Sprite class and Renderer Class: public class Sprite { //Reference to Activity

2D game programming tutorials in C#

由 你离开我真会死。 提交于 2019-12-02 17:17:59
I want to learn about programming 2D games in C#. What are the best tutorials that are beginner oriented, written for C#, and preferably use GDI+ (or something equally simple)? I am relying on the experience this community has to direct me towards the best. Books Beginning .NET Game Programming Beginning C# Game Programming Links Coding 4 Fun is a great .NET resource that has quite a few user-created games. They also have a book and a 2-D game primer Tutorial Listing at C# corner C# Game Tutorial for Beginners (video) Link to more game programming e-books Advanced Topics The Farseer Physics
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