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Game Creation Mastering Development

Pathfinding algorithm isn’t finding correct route

I am attempting an online coding challenge wherein I am to implement a pathfinding algorithm that finds the shortest path between two points on a 2D grid. The code that is submitted is tested against a number of test cases that I, unfortunately, am unable to see, but it will however tell me if my […]

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Ask Biology

When the leaf length ranges are given in a plant species’ description, what do the numbers in parentheses represent?

Referring to a plant species, a paper I am reading (see citation below) says: "Blades are 4–5(6) mm long and (0.5)1–1.5 mm broad." I understand the numbers 4-5 and 1-1.5 would be the ranges, but what do the numbers 6 and 0.5 in the parentheses represent? Domínguez, Y., Valdés, C. M. P., & de Miranda, […]

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Game Creation Mastering Development

Can someone please help me with this pong game? The ball won’t appear

<!DOCTYPE html> <html> <head> <title>Pong</title> </head> <body> <canvas id="canvas" width="640" height="480"></canvas> <script> var canvas = document.getElementById("canvas"); var ctx = canvas.getContext("2d"); function paddle(x, y, width, height) { this.x = x; this.y = y; this.width = width; this.height = height; this.hasCollidedWith = function(ball) { var paddleLeftWall = this.x; var paddleRightWall = this.x + this.width; var paddleTopWall = […]

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Game Creation Mastering Development

Can someone please help me with this pong game? The ball won’t appear

Pong var canvas = document.getElementById(“canvas”); var ctx = canvas.getContext(“2d”); function paddle(x, y, width, height) { this.x = x; this.y = y; this.width = width; this.height = height; this.hasCollidedWith = function(ball) { var paddleLeftWall = this.x; var paddleRightWall = this.x + this.width; var paddleTopWall = this.y; var paddleBottomWall = this.y + this.height; if(ball.x > paddleLeftWall && […]

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Game Creation Mastering Development

Can someone please help me with this pong game? The ball won’t appear

Pong var canvas = document.getElementById(“canvas”); var ctx = canvas.getContext(“2d”); function paddle(x, y, width, height) { this.x = x; this.y = y; this.width = width; this.height = height; this.hasCollidedWith = function(ball) { var paddleLeftWall = this.x; var paddleRightWall = this.x + this.width; var paddleTopWall = this.y; var paddleBottomWall = this.y + this.height; if(ball.x > paddleLeftWall && […]

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Mastering Development

How to allocate tickets

I have two files : Category: Category_File = data.frame(c("A","A","A","A","A","B","B","B","C","C","D","D")) colnames(Category_File)= c("Category") Agent: Agent_File = data.frame(c("A","A","B","B","C"),c("X","Y","X","Z","Y"),c(2,2,2,1,2)) colnames(Agent_File) = c("Category","Agent","Tickets") I need to allocate agents according to their category count. Desired Output: outputfile = data.frame(c("A","A","A","A","A","B","B","B","C","C"),c("X","X","Y","Y","NA","X","X","Z","Z","Y","NA","NA")) colnames(outputfile) = c("Category","Agent") Thanks

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Mastering Development

Setting pixel color of 8-bit grayscale image using pointer

I have this code: QImage grayImage = image.convertToFormat(QImage::Format_Grayscale8); int size = grayImage.width() * grayImage.height(); QRgb *data = new QRgb[size]; memmove(data, grayImage.constBits(), size * sizeof(QRgb)); QRgb *ptr = data; QRgb *end = ptr + size; for (; ptr < end; ++ptr) { int gray = qGray(*ptr); } delete[] data; It is based on this: https://stackoverflow.com/a/40740985/8257882 How […]

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Apple User Help

Mac OS alternative to jstest

There is a wonderful little utility on Debian called jstest, whose man page is found here. This util can be used to show which buttons are being pressed on a gamepad. Does something similar exist on the Mac? It can be graphical, command line, or built-in, I do not care. jstest example output: Driver version […]

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Cryptocurrency Ethereum Mastering Development

Why DS-Math add WAD/2 or RAY/2 in WAD,RAY multiply function

//rounds to zero if x*y < WAD / 2 function wmul(uint x, uint y) internal pure returns (uint z) { z = add(mul(x, y), WAD / 2) / WAD; } //rounds to zero if x*y < WAD / 2 function rmul(uint x, uint y) internal pure returns (uint z) { z = add(mul(x, y), RAY […]

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Mastering Development

I need to disable the mouse and keyboard using python

I’m making a script to share the same mouse and keyboard on multiple devices. The sharing part is done but I need to find a way to disable the host’s mouse and keyboard when it’s sharing to another computer but at the same time wanna get it’s x and y axis and keypresses. I’m using […]