Collision detection is the determination of whether or not two or more entities make contact with each other during gameplay.

learn more… | top users | synonyms (2)

1
vote
1answer
53 views

Best way to deal with Collision in JavaFX

This question I'ts no exactly a fix for the current game I'm working on, but I am showing it as an example to explain my problem. I just want to know the best way to handle collision in JavaFX. My ...
0
votes
1answer
87 views

AABB collision resolution issues

I'm trying to make a character collide with some tiled terrain. I have an issue with the collision resolution, and after days of shooting in the dark ant not finding any relevant help online, I'm no ...
0
votes
1answer
46 views

Libgdx Platform collision problem

I am trying to come up with a collision function where all the cases are made. If the player (Who's hit box is a circle) collides with a platform (hit box is a rectangle) from the right the ...
-1
votes
1answer
23 views

Java-script map/array “undefined” [closed]

Hi when I call the the function below in the chrome console it tells me "Type error cannot read property '2' of undefined" why?. defining the map: var map = { FALL:[ [0, 0, 0, 0, 0, 0, 0, 0, 0, ...
0
votes
0answers
51 views

Simple Bullet Physics Collision Detection

I've been looking into bullet physics a lot here lately to handle my collision detection. I was using XNA collision but once I started to implement momentum into my physics simulation true and false ...
-1
votes
1answer
59 views

Adding obstacles & collision to canvas game

I am trying to add some obstacles to the canvas game that I've got but something seems to be wrong and I can't seem to put my finger on it. I just want some simple walls here and there to make the ...
0
votes
1answer
64 views

Swift - Why does my SKShapeNode pass through an object, pausing briefly beforehand?

The code below when run on a device that’s flat on the table shows a red circle (the 'ball') and a line. When I gently tip the device the circle moves towards the line. When it reaches the line, it ...
0
votes
0answers
73 views

How can I detect collision between two objects

I have some code that when I click on an object with my mouse it will change it to another object. I'm using this code to change an object into a shattered version I made of it for destruction ...
1
vote
0answers
36 views

Collision detection with PyGame

I have been making a 2d platformer using Python with PyGame. It has all be going good, but I have stumbled accross many problems with collision detection. Here they are: You can't go through objects ...
1
vote
0answers
48 views

Entity to tile collision detection (C++, SDL)

I'm currently trying to handle collisions between entities and a tilemap, but I've hit a problem. My tiles are stored simply as integer tile IDs in a multidimensional array, and I wanted to perform a ...
-1
votes
1answer
26 views

Checking collision from below using OnCollisionEnter

Want to use OnCollisionEnter to see if there is a collision from below. void OnCollisionEnter(Collision other) { foreach (ContactPoint contact in other.contacts) { ...
0
votes
2answers
48 views

Ping Pong bat is not detecting the collision with the wall

I have been learning Unity for last couple of days. I want to make one simple ping pong game. The idea is simple. The game has a Sphere as a ball, a plane as ground, 2 rectangles as bats and 4 ...
0
votes
2answers
41 views

How to prevent the player from calling the Jump function if no collision is detected?

I am back once again. This time with a basic 2D platformer game. I would like to allow my player to jump but only if the ground bool checks as true. I would like to fix my script so that upon ...
2
votes
1answer
126 views

Creating a Collision Detection system [duplicate]

I'm currently working on 3D project (C++) and I have now come to writing the collision detection systems. Basically my question is regarding how to architect it. All the collisions are either ...
0
votes
0answers
59 views

My sprites do not always respect collisions in Pygame

I have a Player sprite (40x40 pixels) and Tiles (20x20 pixels) which build the terrain. At the 4 edges there are 2 rows or columns (depends on vertical or horizontal) of wall tiles. Those are the ...
0
votes
0answers
33 views

Proper Angled-Top Down Wall Collision?

Sorry about the vague title, it's kind of hard to say what I want to do in a few words. In my top-down game, I'm having a problem implementing proper collision for walls facing north (that is, you ...
0
votes
0answers
34 views

Detect which direction an object collides with another

so I am trying to implement a collision detection system. I'm only using rectangles, so it's not too complicated. My collision detection currently does detect if the 'player' object intersects the ...
4
votes
1answer
94 views

Torus World Collision Dection

I am looking for a collision detection solution for use when 2d screen wrapping. Specifically, when the image is split between the right and left side I can only detect a collision for a limited ...
0
votes
0answers
34 views

Advantages of “Overlap testing” and “Intersection testing”

I have been looking for advantages and disadvantages of both techniques, but I was only able to find a few disadvantages such as: Overlap testing may fail for objects moving very fast and Intersection ...
1
vote
3answers
121 views

3d collision for non mathematician

I am having an extremely hard time understanding smooth 3d collision, i have spent month trying to figure out the math and still cannot get perfect collision like in games such as Quake. I've ...
0
votes
1answer
82 views

Libgdx using Box2d with TiledMap to create collision detection

I'm fairly new to Libgdx and have some good basic knowledge on Java. Right now I am stuck on how to add collision to my TiledMap, I am using the Mapeditor to create the tilemap. I read so many ...
1
vote
1answer
145 views

How do I make circles bounce off each other realistically?

I'm trying to create bouncing balls with realistic physics. At the moment, when the balls hit each other, they bounce back in the same direction they came from. How do I make them more realistic? I ...
0
votes
1answer
70 views

LibGDX collision with rectangle and circle

I have 2 objects, A and B, both are classes with only values, so positions and dimensions are only values (float posX,posY). I have a render class which render A and B with shapeRenderer; A is ...
1
vote
1answer
59 views

Will Frame Independant Movement break collision

Using my game loop to give my game movement which is independant from the framerate, has been working fine for me but, I've started to consider my games running on machines which cannot keep up with ...
0
votes
2answers
108 views

Java 2D Game Hitbox Detection & Rounded Corners

I am working on a simple 2D game with Java, swing and no framework. I have a rectangular player that the user can move around. On the map are few obstacles which the player should not be able to go ...
0
votes
0answers
22 views

JBullet - Object is colliding at the wrong location!

I'm trying to make archers walk on my ship. I create the ship mesh like this: { Model mesh = null; try { mesh = OBJLoader.loadModel(new File("res/ship.obj")); } ...
0
votes
1answer
23 views

Nested ipairs for basic hit detection

So i'm developing my first game using Löve, the game is a basic asteroids clone. Everything is going well so far, until I decided to actually add asteroids. I'm trying to make a basic hit-detection ...
0
votes
1answer
63 views

Implementing a 2D Collision method that can tell direction of collision (boxes)

Been searching for quite a while now and really struggling to find an easy way, or a good tutorial on how to create a collision detection system which can indicate what side on a box a collision has ...
2
votes
2answers
100 views

Spatial Partitioning - Objects larger than cell?

I'm developing a top down 2D tile based game. Recently I started working on collision detection and have gone down the route of simply using spatial partitioning. Each object belongs in a cell and ...
1
vote
1answer
98 views

Bullet Physics - Collision not working when moving btBvhTriangleMeshShape

I have a robot (btTriangleMeshShape for each component) and a chain of boxes used as a cable, which is anchored on two components of the robot. I want to rotate a robot component and when this ...
4
votes
3answers
211 views

Sphere to plane collision never rearching resting contact

I have been trying to have a sphere to plane eventually lead to the sphere coming to a resting contact, but my sphere will end up always bouncing forever. It will bounce correctly for the first few ...
1
vote
1answer
55 views

Find distance from Vector2 to nearest point in Rectangle

I'm setting up collision detection and I have Walls which store their positions as rectangles. I need to figure out the distance from a Vector2 to the nearest side of a rectangle. If this was two ...
0
votes
1answer
137 views

Good collision resolving mechanism

In my game i have plenty of objects that can collide. Literally, most of them can collide with each other.The problem I'm facing is that i can't come up with some good collision resolving way. How can ...
0
votes
1answer
44 views

Resultant Vector Of Circle Line Collision

For my game I need to have a circle collide against a wall and bounce off in the appropriate direction. I've looked around for a while and haven't found a good solution to my problem. I have a diagram ...
0
votes
0answers
35 views

How to use collision masks and overlap_area in pygame?

So, I've been prototyping a game, and I've been using sprite collision, and it's not cutting it any more. I read up on the documentation about masks and overlap area: ...
0
votes
1answer
36 views

How to calculate collision detection from big rectangle to small rectangle

i have big rectangle that can move to each side , its boundaries can't enter to the small rectangle inside it , the anchor point is in the middle of both of them . lts say the big rec is 1000 * 1000 ...
1
vote
1answer
113 views

Rigidbody physics concept: Why translate collision shape on-the-fly instead of mutating it?

Crossposting at http://stackoverflow.com/questions/29993547/rigidbody-physics-concept-why-translate-collision-shape-on-the-fly-instead-of-m I've spent some time going through physics engine's ...
0
votes
3answers
251 views

Error in Finding Nearest Hexagonal Tile

Using Openfl for a game using hexagonal tiles Working out the problem of walkability in a game, and I've run into an issue with my Hexagonal tiles. I think it is an odd rounding error of sorts. When ...
0
votes
0answers
40 views

Should I handle mobile collision from the mob or projectile? [duplicate]

I have a fast tile collision setup and quadtrees for collision between mobile entities. I have been back and forth in my other games for if I handle projectile-mob collisions in player or mob ...
0
votes
0answers
46 views

How to calculate multiple collision of sphere and triangles?

I have a sphere and a mesh(triangles). When the sphere intersects the triangle, I reflects the vector of speed and everything works fine. But I can't write a good implementation for multiple ...
3
votes
3answers
190 views

Getting one-point-collision object to conform to uneven terrain while keeping constant distance covered

This is probably best described by image: I have a character. For floor collision, it uses a single point (the red X). When the character moves, it conforms to the terrain; note how the blue line ...
0
votes
1answer
145 views

Sprite Kit - keeping character level with the terrain 2d endless runner

I've been trying to figure this out exhaustively for the past few days and still haven't found an answer. I have an endless runner built using swift where the character is fixed and the terrain moves ...
0
votes
1answer
75 views

Swift - How do I detect the exact point at which two “SKPhysicsBody(edgeFromPoint:” type physics bodies intersect in sprite kit

I have two physics bodies attached to two separate sprite nodes using Sprit Kit. One is a vertical line and one is a horizontal line: //sprite with horizontal physics body ...
1
vote
2answers
148 views

How to detect collision of a wall with grid movement?

I have this little game, where my player is moving around a simple level, using a grid based movement script (See code below). My problem is that I have tried to implement a 2D raycast, which has to ...
0
votes
1answer
82 views

Collision between a sphere and a mesh(height-map)

I am trying to implement a method that detects the collision between a sphere and a mesh and reflects the vector of speed. I have a method, that detects a collision between a sphere and a triangle and ...
1
vote
1answer
226 views

Why does my character stop a little before landing on the ground?

I made a little game with side-scrolling and a box (the player) jumping across the level. The simple physics are almost done, but I have two problem with the way things behave: On landing, the box ...
0
votes
0answers
34 views

JBullet - Two RigidBodies will not collide

I am adding two ships into my collision world. (The green dots are the collision shape (an ObjectArrayList) that I am passing to the ConvexHullShape) However they don't seem to collide. In fact, ...
0
votes
2answers
108 views

How to keep a shape inside a rectangle

So i'm making a game which is based on randomly generated rooms and i need a way to keep the player inside them and make the player glide when he collides with the room's bounds. I currently have a ...
0
votes
2answers
64 views

Ball oblique impact physic in Java?

I know Q3 + Q4 = 90 I searched internet and many physic topics, but not found how to calculate this values in Java? (I found V3 and V4 but not found Q3 and Q4) So how can i calculate V3, V4, ...
0
votes
1answer
88 views

Platformer collision advice

I've been trying to implement collision for a platformer but I can't find a good way to get the collision of certain sides without it get glitchy. So i try to get the collision of the top rectangle ...