Questions tagged [canvas]
Canvas is a drawing element introduced to web development with HTML5.
160
questions
-2
votes
0answers
14 views
Algorithmic Performance: Solution Analysis of JS Functions [on hold]
Good Day! I'm shaky on algorithmic performance analysis (Big O time and space complexity) and was wondering if the code I wrote has the proper time and space complexity. Also are there any ways to ...
4
votes
2answers
76 views
Edge detection in a canvas
I have one function in my code to detect edges in a canvas but it's the slowest part of my code and is used everywhere. If I could just optimise this, my whole program would speed up considerably.
...
5
votes
2answers
133 views
Improving particle performance in P5.js
I have modified a particle system to create an effect similar to the one that I want. However, with any substantial amount of particles it performs very slowly on my laptop (around 1.7 fps at the ...
2
votes
1answer
46 views
React component to animate planets on a canvas
I wrote some JavaScript to generate some graphics on a canvas, on a regular HTML page.
I now want the same code to run in a component that is part of a React app. I've done this:
...
3
votes
1answer
53 views
JS Simple game in canvas
I'm trying to learn javascript (especially the OOP part) and made this simple game. I'm looking for advice and ways to improve my code.
Did I handle OOP well enough?
What's the best way to create a ...
6
votes
1answer
68 views
Tetris Game Javascript
I am creating Tetris in javascript. I have finished the basic mechanics. I would appreciate some feedback on how I could improve it.
Down, left, and right arrow keys move the piece while the up arrow ...
5
votes
1answer
84 views
15 Puzzle Game JavaScript
I have created a program that lets you play the fifteen puzzle game. You have to get the blocks into ascending order by moving them into the one open space. I would like some feedback on the code and ...
1
vote
1answer
50 views
Upload image without src attribute
We gave an option for user to Upload the image
Image is uploading fine, but its not adding any img src tag for that uploaded image.... Is this is acceptable to upload image without using any img tag ?...
3
votes
1answer
45 views
Monte Carlo pi animation
I have created a program that calculates pi using a Monte Carlo method. It also animates the process and displays the value as it is updated to show how it gets closer and closer to the actual value ...
2
votes
1answer
82 views
Mandelbrot Set generator
I want to reduce the big time it needed for my mandelbrot set generator to work. I'm working this for already a week.
I tried to reduce the canvas size from 400 by 400 to 200 by 200 and the speed ...
3
votes
1answer
27 views
Recamán Sequence Animation
I wrote a program that animates the Recamán sequence. It is in uses HTML canvas and JavaScript. I was hoping for some feedback on how it could be improved.
...
2
votes
2answers
184 views
JavaScript flood fill
I tried to implement a very simple color flood fill to experiment a bit with Javascript. All comments about the code are welcome but I am especially interested in performance as it seems to be a bit ...
2
votes
0answers
111 views
Simple jumping game: continue with jquery or switch to html5 canvas?
I'm coding for fun with the secret ambition of making a fun little game for mobile. So I started out building this little jumping game with Javascript and jQuery.
The game relies heavy on css ...
4
votes
1answer
50 views
Sierpinski’s Gasket Triangle in JavaScript
I wrote the Sierpinski’s Gasket Triangle in JavaScript, but I feel the code can be better, especially from L32 to L47. Could you make it more organized?
...
8
votes
2answers
158 views
Two player snake game
I created a 2 player Snake game from my original one player version. I am looking for some feedback on how I made it. I think I could use improvement when handling input (...
1
vote
2answers
55 views
Wireframe animation on canvas is slow
I'm recently working on a project that involves animation in the background. It works well on desktop but performance drops drastically on mobile. I'm using Paper.js to import a svg and animate it. ...
4
votes
1answer
91 views
JavaScript canvas Snake game
This is my 3rd JavaScript canvas game. It's basically just snake right now but I am planning on adding some more aspects to it soon. I was wondering if I could get some feedback especially on how I'm ...
1
vote
2answers
42 views
A function that generates arrays of video thumbnails using canvas
I have just finished my first version of a function that returns an array of video screenshots created with canvas. What I am looking for are ways to improve this speed by as much as possible. I want ...
5
votes
1answer
241 views
Rendering explosion of bouncing balls on a canvas
I'm making a particle engine that can spawn new explosions while keeping particles from previous ones active (until they despawn).
The code works well on its own but within the game, two or more ...
0
votes
1answer
362 views
Breaking up a simple Paint application into smaller classes
(Sorry this is a repeat post, I hadn't logged in on my initial question and am unable to respond)
I currently have a working code for a simple paint application but it is all in one file and very ...
2
votes
2answers
1k views
Javascript: Canvas drawing - storing mouse coordinates
I have a small JS application that allows a user, after clicking on a canvas, to draw a picture.
Once the user clicks the mouse, the user is allowed to drag the mouse wherever they want within the ...
4
votes
0answers
143 views
Sierpinski triangle html canvas Implementation
I wrote my Sierpinski Triangle fractal animation using html canvas with js: JsFiddle
Code:
...
6
votes
3answers
579 views
My re-written snake game in Javascript
This a snake game I wrote about 1 month ago. It's working well.
Looking for any suggestions for my code, I want my coding improved.
jsfiddle link http://jsfiddle.net/geswhvdc/
...
3
votes
0answers
19 views
Loading NRRDs, images and names of parts and segments
I am creating a program to show NRRDs which are a format of medical images. In addition it loads a gallery of thumbnails, where each thumbnail has a link to change the selected NRRD. Plus there is a ...
10
votes
1answer
193 views
2
votes
3answers
608 views
Display Thousands/Millions of different background images
Kindly help me check this code, I want to be able to make it load thousands/millions of different pictures as HTML background without crashing or slowing down the browser.
The images can be created ...
6
votes
1answer
78 views
Pong Game in JS
I am new to game development and took on the task to create a Pong replica due to my curiosity and interest in the field. I decided to write it in JavaScript because the game is not too labor ...
0
votes
1answer
206 views
Improving canvas pre-rendering [closed]
I define my canvas as you normally would, but I also include a bunch of different makeshift canvases:
...
2
votes
0answers
161 views
Inventory and stats for a game with Tkinter
It's an inventory UI and also displays the player's stats. I have been programming for a year or more and I want to improve my code.
...
5
votes
1answer
603 views
JavaScript Graphing Calculator
I have a pretty functional JavaScript based graphing calculator.
Functions like \$\space tan(x)\$, \$\space\frac{1}{tan(x)}\space\$ and \$\space x^{high\space number}\space\$ look weird, however ...
4
votes
2answers
171 views
Lorentz Attractor visualization using functional programming
I have been working on this Lorenz Attractor visualization for the past day. I am currently also trying to change my coding style into a more functional programming one.
I find it quite hard, to be ...
2
votes
0answers
59 views
App showing a welcome page with an animal's picture
I have an app which shows a welcome page with an animal's picture. Also, we can navigate to a second view, where there are two canvas, and a collapsable panel which hosts controls' inputs.
The aim of ...
1
vote
1answer
40 views
Display class containing a Canvas in a JFrame
I've been using this class for so long, I never thought about how terribly big and how bad it looks. Looking back on it, this class looks so out-of-date, and nothing explains itself; I want to get it ...
1
vote
1answer
1k views
Read an image file into a canvas and display click coordinates
I am a beginner in JavaScript, which I have started studying since Summer last year.
My code's purpose is read a file from file explorer, and put that image in a canvas. Also there is code to allow ...
2
votes
2answers
291 views
Drawing a castle and towers with acm.graphics
The following code is my solution of exercise 10 of chapter 5 of The Art and Science of Java. So here, using acm program and graphics, I need to draw a castle with two side towers and other three ...
10
votes
2answers
508 views
Implement a Tetris game in JavaScript using HTML5 Canvas
I just wrote a Tetris game and I'd like to ask experienced people for a code review, especially in terms of code efficiency and bad coding habits, and if the code is easy to reason about.
Here is the ...
2
votes
1answer
473 views
A simple JavaScript and HTML5 Canvas drawing component
This is my first time writing a Vanilla JS plugin.
I have tried to make a simple HTML5 canvas drawing script. I have tried to handle both touch and mouse events on the canvas.
Kindly help me point ...
7
votes
1answer
327 views
Yet another flappy bird clone
This is my first game,
and I really want to improve my coding skills.
Please review my flappy bird clone implementation
and let me know how it could be optimized,
and any other coding tips.
...
2
votes
1answer
5k views
Manipulating images and text on a canvas using Fabric.js
I have a small application that allows a user to manipulate objects on a canvas with fabric.js. I'm new to JS and Fabric.js, and I'm hoping to get some direction on how I could write this neater:
<...
0
votes
1answer
51 views
How to run canvas animation without effecting other javascript code [closed]
It seems to be the case that the canvas animation affects other JavaScript functions when I use window.onload = function() {. Please let me know the best practice ...
2
votes
1answer
2k views
Redraw text on change, with automatic zooming, using fabric.js
My code works, but I think that my code is non-standard, not optimized, and has poor logic. I want to improve my coding skills, so please suggest how to improve my code.
...
2
votes
1answer
56 views
Plotting points representing many events on a canvas
I have a web app which uses Node canvas to plot points on a graph. Each point is called an 'event'. An event is an array of usually 6 'parameters' represented as numbers. My app allows users to plot 2 ...
1
vote
1answer
3k views
On right click draw triangle to the canvas
This is a simple program that using easelJS adds functionality to the right click, when the right mouse button is clicked a triangle is drawn to the screen. I am just wanting to get the opinions of ...
4
votes
2answers
214 views
Game of life - JavaScript
I would like to kindly ask others to review my code. I'd like suggestions, criticisms, and discussions on what is good and what could be done better.
...
0
votes
4answers
3k views
7
votes
1answer
3k views
Space Invaders-like game in JavaScript
In this game, you play as a small red square and move left and right on the screen trying to shoot the yellow boxes that fall from the top of the screen. It is infinite and each time you remove a line ...
5
votes
1answer
752 views
Classing Pong game
I have just started coding. Anything to help simply or improve the code?
This is fully finished and ready to play, though the ball bounces off the wall directly behind the paddle, rather than off ...
2
votes
0answers
52 views
Detect objects that the mouse is close to
Here is a little widget that I've made. I'm looking to refactor the way that I'm doing hit detection. Currently, every square on the screen finds the distance between itself and the cursor.
Because ...
5
votes
1answer
210 views
Particle text directive
Directive that shows text as particles on a canvas. Looking for a general review. Plunker here.
image.service.js:
...
1
vote
0answers
601 views
Drawing a board for the board game GO (HTML canvas)
I am working on a GO game in JavaScript and drawing the board is important to be efficient because it gets ran multiple times a second. As when the user moves their mouse, it will simulate where their ...
