Questions tagged [javascript]
"JavaScript (sometimes abbreviated JS) is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles." From Wikipedia. http://en.wikipedia.org/wiki/JavaScript
193
questions with no upvoted or accepted answers
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Collision detection between draggable object and world objects?
I have a game I'm making in Javascript that will involve combining items by dragging and dropping them onto each other. Think Alchemy or similar.
So far, so good, but I hit a snag while trying to ...
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How can I call a native mobile API in Construct 2?
How can I use mobile API features in a Construct 2 game (HTML 5/JavaScrit engine)?
I didn't find anything about that on the net, unlike other game frameworks like Corona Enterprise or Cocos2d.
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Phaser: InvalidStateError
I am using the Phaser framework for game development, but while working on it I face a bug which is annoying, I have the following message:
InvalidStateError: An attempt was made to use an object ...
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4
votes
1
answer
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HTML5 Canvas - Drawing with Floats
I'm trying to implement a game where you have car moving along a line in HTML5 Canvas. Using a little bit of trigonometrie I managed to get the right x and y coordinates to add to the coordinates of ...
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Why does interactive cloth not appear in game view in unity5 Pro?
I used interactive cloth fir flags in unity5 Pro version and it appears in scene view but does not appear in game view while playing. What can I do for that please somebody help me out?
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1
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Storing stateful function-based actions in a JSON
System: My game uses an "ECS + event queue" architecture where every tick, various events change
the state of JSON-able data. Plain JS objects.
Problem: I want to be able to save the game-...
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3
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0
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Game runs at different speeds in Chrome versus Firefox
I am using Box2D for physics on the server side.
Player position is updated on the server, so there is nothing the client can do except give input.
But running game in Chrome only, the player moves ...
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3
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Phaser: Scaling to fill screen, maintain pixel ratio, but not aspect ratio
I've used libraries in other languages before that provide different types of scaling via viewport types. The best example of what I want is from a library called libgdx for Java, their ScreenViewport....
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3
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133
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Optimising my Node.js/Js/Socket shooter game
So here I made a little shooter game just to play around with and on my pc it runs fine but for people with worse internet/less powerful computers (e.g at school/few friends of mine) it is quite laggy ...
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3
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68
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Allowing one sprite to move through another in Quintus
I have a Bumper class extended from Sprite:
...
user87553
3
votes
0
answers
925
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Change color of bitmap
I am attempting to understand the easeljs ColorFilter and its use with cache. There is quite a bit of information at the easeljs site but it's not clear based upon the examples and documentation.
...
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3
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Image won't scale after click
Despite being a long-time developer I've never played with JavaScript libraries or any sort of graphics development. With my son we're trying to create something interesting and are using createjs/...
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3
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0
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Drawing a hexgrid on a canvas, yet making it zoom/scrollable?
I'm developing a game in JS / PHP. The game is basically a 2D plane (hexgrid) where each hex represents a location in space.
In total, I'm drawing 25 * 25 hexes on a 1000x1000 canvas. I also draw ...
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2
votes
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Tell if two polygons are colliding
I want to make a function like areColliding which takes two polygons as args.
I also want to cover cases like
and the dreaded
because I am trying to create a ...
user149847
2
votes
0
answers
31
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Electing a host with WEBRTC
This is similar to Host Migration (P2P) with RTMFP and AS3
I have a webRTC chat room, initially used Twilio and switching to skyway, the situation is that I have a bunch of peers with data broadcast ...
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2
votes
0
answers
951
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Idle game: calculating resource generation/consumption
I'm making an idle game in the vein of Melvor Idle and I've run into a problem calculating the yield and consumption of resources while the user is away. For those who don't know, many idle games have ...
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2
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0
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999
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How can I build Goal Oriented Action Planning within an Entity Component System?
I've been creating an interactive fiction game in javascript that uses an entity component system as described here. The problem I've encountered is in developing the AI system for the game. Ideally, ...
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2
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2D platformer:How to avoid "bouncing descend" when walking down slopes?
I've been working on implementing slope collision by SAT(Separating Axis Theorem). And then I have a trouble. When my character walks down slope, it moves like a bouncing ball:
The slope has 3 ...
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2
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0
answers
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Detecting collision of multiple moving objects
I have wrote a simple game that has a 100 balls bouncing off the borders of the canvas. Each ball is an instance of ball class function that has the following ...
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2
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0
answers
717
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My collision detection is not working when I rotate my mesh in three.js
I am trying to move a ball mesh through a maze. The maze belongs to a parent object3d. My issue is that when I move the ball I can't detect collision right well because in the rotation, the axis ...
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2
votes
0
answers
172
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Phaser: Shader Chain
I want to implement lighting via shadowmaps. I see process as:
1) render something to RenderTexture1(size as game)
2) create RenderTexture2 (custom size)
3) add it to Image2 (custom size)
4) apply "...
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2
votes
0
answers
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Implementing Separating Axis Theorem to Detect and Handle Sliding Collisions
I am having a bit of difficulty detecting collisions properly with separating axis theorem. My code seems to be giving a lot of false alarms. Also, I've looked into implementing sliding collisions ...
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2
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0
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281
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how to detect if a line is crossing another shape in javascript?
given the situation here
http://jsfiddle.net/h902cLpy/
is it possible to detect that a line going from A to B does cross another shape while A to C doesn't?
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394
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How can I mimic an isometric perspective using square tiles?
Can an isometric perspective be mimicked with traditional square tiles? Can't the effects of the 45-degree overhead view simply be "drawn in" to the square? How would this work?
Picture this: the ...
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2
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0
answers
139
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p2.js physics engine behavior on Heightfield
I am writing a small game consisting of a 'ragdoll' character riding a skateboard.
I have created a 'skateboard park' with some ramps and a jump.
I am using a 'heightfield' object as the ground. ...
2
votes
0
answers
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Converting coordinate systems to/from an isometric game world
I have tried searching and reading for an answer, but the information I could dig up either didn't fit what I need or was in the form akin to "Just multiply the vectors with the inverse matrix of.." ...
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2
votes
1
answer
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finding the angle to launch a projectile at a 3d coordinates
I have a game where the user can shoot a bullet and the bullet flies through 3 dimensional space and eventually hits the ground somewhere. My question is how can I calculate the ...
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1
vote
0
answers
29
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steering behaviors collision avoidance: vehicle shaking before arrive at destination
I have made a test sketch of collision avoidance using javascript, as you can see right here.
I want the vehicle to move to the clicked location, avoiding obstacles on the way. It is working, but not ...
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1
vote
0
answers
176
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Aircraft simulation
Trying to get a "semi" realistic aircraft simulator. I'm pulling my hair out because I just can't get the math right. I'm not looking for super realistic but want to at least get some ...
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1
vote
0
answers
414
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How to make an update loop in a Node.js game server
I'm making a multiplayer game with a Node.js server, and I'm searching for how to write the game loop.
I'm currently using a setinterval every 15ms, but someone ...
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1
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0
answers
415
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What is causing my touchstart event to end while I'm still touching the screen, and how can I fix that?
What I'm trying to do:
I'm trying to add touch controls to games created with the html canvas and JavaScript so that they can be used on mobile / tablet devices.
The controls should simply move a ...
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1
vote
0
answers
116
views
Jittery entity Interpolation when tick-rate exceeds framerate
In my current game implementation, our game servers send data to the clients only 10 times per second (~every 100ms). However, due to recent changes, we are now expected to change the server tick-rate ...
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1
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0
answers
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How can I make this motion collide against a wall
EDIT
I've actually commented out the motion in my code and adapted it to try reproduce this post.After a chat with @DMGregory he told me to use velocity reflection but as you can see in the following ...
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1
vote
0
answers
371
views
How to play multiple sounds at once without reloading data?
I am making an HTML5 game, which involves one audio being played multiple times at once.
I searched this issue up and found this: https://stackoverflow.com/questions/25654558/html5-js-play-same-sound-...
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1
vote
1
answer
406
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How to perform a sliding collision between a square and a circle?
Please point me to the duplicate if this has been asked before. I couldn't find it.
Basically, I am creating a 2d top-down game where the player is represented by a circle, and the tiles are ...
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1
vote
0
answers
59
views
Tagging "regions" in rot.js map generator
I'm working on a small roguelike and I'd like to be able to tag the various "regions" generated via the Map generators so that I can use it as a lookup to environment descriptions. I see ...
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1
vote
0
answers
45
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How to show part of the world scaled to screen size?
I have a world size of 100x100
I want to map this world size to screen size using this mapTo function
...
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1
vote
1
answer
484
views
RayCasting with Mode7
I'm trying to join the mode7 algorithm with RayCasting. For mode7, I'm using a simple rotation matrix to implement the rotation. The result is a little strange and I can't fix it. Do you know what is ...
1
vote
0
answers
276
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How can I use canon.js in three.js editor?
I would like to add bullet physics to a scene crated by the three.js editor. Where do I need to put the canon.js file in order to be able to access it's functions from the editor scripts?
I ...
1
vote
1
answer
699
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Help solving Uncaught Abort on HTML5 Build
For some reason there is a Invoke that is triggered when a button is clicked that causes my game to crash. Any idea how I can sort this out?
I have plenty other Invokes and none has given problems. I ...
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1
vote
0
answers
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Problem with collisions detection on canvas platformer
Having a lot of trouble with my collision detection in my platformer. If you go straight to the right the block will float. Also the corners let the block sink right through and the walls are sticky. ...
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1
vote
1
answer
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Making a way to fight monsters in my clicker game
I want a working next and previous button for killing monsters http://prntscr.com/o375y7 http://prntscr.com/o37609 Im new to this concept so i don't know how to go about doing this.
html code(all i ...
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2
answers
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Select Neighboring X or Y Tiles
I have a randomly generated set of tiles, and I am trying to select neighboring x or y tiles to perform functions on them based on if they are a certain value of tile, like so:
...
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Where to store constantly changing game data such as duels data?
I'm making a discord bot which allows players to collect and duel cards. All the cards, players and other data is stored in MongoDB but where should I store duels data? Duels data will keep changing ...
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1
vote
1
answer
355
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Behaviour of containers in Phaser 3 framework
I don't understand the behaviour of containers in this example:
Phaser example
The part I don't unerstand is line 41. Why is lastContainer assigned to newContainer? In line 40, newContainer is added ...
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1
vote
0
answers
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views
Get return of asynchronous callback since module export- Nodejs
Server:
require('./MovimientoJugador')();
var camino4=MoverJugador(startX,startY,endX,endY,mapa2);
console.log("Camino: " + camino4);
MovimientoJugador:
...
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vote
1
answer
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How to rotate player to face mouse on canvas?
I'm building a basic game using plain javascript and I am trying to rotate my object to follow my mouse.
I've tried getting the client's mouse X and Y then subtracting the canvas width and height ...
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1
vote
0
answers
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How can I get my player's character to slide along a rail?
I am creating a snowboarding game and would like my player to be able to jump on a rail and move along it if it lands on it.
I have no idea how to approach this. I have already tried using ray casts ...
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218
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Junk movement with steady 60fps on Web canvas
I'm new to building games on canvas, and I'm trying to create one. But I encountered a problem with sprite movements. My sprites move is smooth, but sometimes it starts to "jump". FPS is stable 60 ...
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Performance problems with scrolling html5 canvas for large tile-based game
I try programming a splix.io clone as an electron app and do the visualization via the html5 canvas. The movement across the tiles should look fluent like the original, so I target 60 frames a second. ...
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