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

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Detecting Collision in Next Step when Collider is rotating

In my Gamemaker: Studio game, I have a collision script for my enemy. The enemy is an alien, oSwarmer, moving through space which is also filled with drifting, spinning bits of debris. Some debris ...
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What are the best bullet collision detection methods for FPS games? [duplicate]

Bullets are too fast and can be represented as points. Common collision detection methods, like the ones using bounding volumes, may not be suitable. What would be the best for this work. Edit: this ...
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663 views

How to handle collisions without ugly conditionals and type checking?

(I asked a similar question, but this one is far more specific). How can I handle collisions without having to do a lot of type checking and if statements? People here suggested that when spotting a ...
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35 views

How to program destructibles? [on hold]

I'm thinking about programming a 2d simulation of a spaceship that takes damage depending on where the projectile came from (e.g. from behind - engine, from the front - lasers, sides - hull, etc.). ...
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25 views

Collision causing FPC to go haywire

I have created a first person controller as an enemy in my game (Zombie), my character is an Archer using Arrows as projectiles fired using: if(Input.GetButton("Fire1")) { shotForce += ...
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281 views

Collision detection doesn't register until player sprite jumps

I have implemented a shooting mechanic into my game, and the act of shooting works fine. The shooting work is done in my "game1" class. The issue that arises is when I incorporate collision detection ...
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21 views

Game Maker - Collision With Subimage Total Storing

I have 3 objects: obj_bullet, obj_meteoriteLv2, obj_tempMeteoriteLv2. obj_meteoriteLv2 contains 4 sub-images. obj_tempMeteoriteLv2 helps obj_meteoriteLv2 spawn. obj_bullet is controlled by player, it ...
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70 views

Issue with detecting collisions in Pong

I've been working on making Pong in OpenGL and SDL and currently have both paddles and the game ball set up properly. I have an Object (or Entity) class which is used to instantiate each of the ...
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59 views

How to combat exponential growth in sprite messaging?

In my 2D platformer game, I have a number of sprites moving around the world. When two sprites collide with each other, I calculate how deep the collision is and then call a virtual method on both ...
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273 views

Determine wheter an octree node needs to be continue

For collision detection (moving vs. non-moving) in my current project, I decided to implement an octree approach after the preselection. The only collision detection I'm currently using is a ...
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19 views

Mesh Collider in Monogame

I try to implement a few complex objects and want to achieve that they collide based on everything the player is able to see. Therefore I am not able to use the basic BoundingSpheres. Has anybody an ...
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2answers
299 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 ...
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90 views

Bullet: No Bouncing off the walls

I'm using Bullet Physics for Collision Detection in a first person game. The collision basically work fine, I cannot walk through objects. But if I walk against the wall and release the key I get ...
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140 views

Where should I save game object's attributes (hp, score) in Swift?

Scenario: I have a game with several game objects on screen. Each can have different score and hitpoints. When I use collision detection for cannonball vs. ship (example) I need to know which ship is ...
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24 views

How to handle interaction with the map in a 2D-RPG-typed TileMap?

Sorry if this is a long post, but I'd like to explain the context before asking my question ^^" I'm currently working on my "first" game (the more advance one, at least). It'll be a 2D-ARPG where the ...
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49 views

Collision Between SKSpriteNode and SKShapeNode

Im trying to create a collision between to objects. one is a SKSpriteNode and the other is a SKShapenode. the Code I have so far for Contact is : func didBeginContact( contact: SKPhysicsContact) { ...
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1answer
90 views

XNA4\ Monogame 3d Collision detection Help please

i have been trying to get 3d collision working for a while and i think(hope) you people can help me so for my project i have created a 'sprite3d' kinda class which is called ModelEntity and there ...
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51 views

Game Maker Studio - Check Collision With Subimages

I have an obj_roulette, which contains 4 subimages, with value 2-5 and image_number 0-3. The value result from roulette stored as var global.roulette. Then, I make many obj_meteorite, which contains ...
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345 views

Adding a small slide when player releases left/right key

The aim is for the player object to slow down and stop instead of just stopping dead. The following codes works ok when the player is not jumping, but gets stuck in an object if the player is in the ...
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1answer
98 views

How do I make my enemies to follow a path and allow them to collide with the player in Game Maker?

I am making a game in which enemies follow a path. These enemies should be colliding with the player, but it's not working. The enemy is walking the path. And, I want to make it so if the player ...
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1answer
153 views

Detect walking on floor - works partially

I have a set of Gameobject blocks that form a floor with Box Collider and a GameObject with a Box Collider in it. My first hunch detecting hitting the floor was: void OnCollisionEnter2D(Collision2D ...
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12k views

Collision detection, stop gravity

I just started using Gamemaker Studio and so far it seems fairly intuitive. However, I set a room to "Room is Physics World" and set gravity to 10. I then enabled physics on my player object and ...
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45 views

Detect Collision on Child Object

I've created an obstacle prefab. The Prefab has following hierarchy. The player must die if he collides with Enemy. But It detects collision with parent object. I am also uploading the screen shot ...
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99 views

Frustum culling takes ages c++

I have two ways of doing frustum culling taken from different web sources. First one takes 200ms to check 10k AABBs, second around 50ms for the same box count. I read some forum answers, people say ...
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27 views

How to integrate Tiled maps and collision detection with pygame?

I have been using pygame to make a simple rpg pokemon style game. To create maps I have used the Tiled map editor and then loading them into pygame using pytmx. I have heard that you can add object ...
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50 views

Targeting logic for 100.000 units army

I am making an army fight for my website armyfight. There can be fights of hundreds of thousands units. I am looking for better unit targeting. in jsfiddle is an example. var enemy = { 2: { ...
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245 views

Move collider along with model with Mecanim jump animation

I've been creating an infinite runner game in Unity3D for a while and I got stuck in this point that whenever my character jumps using Mecanim system his model (mesh) goes to air but his attached ...
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Can I use two Collision Boxes on the same GameObject?

I have two Collision Boxes on the same GameObject. I don't want the Collision Boxes to be triggers. I want the Collision Boxes on the actual GameObject, not its children. For example, if I want to ...
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3answers
377 views

Fastest 3D bounding box algorithm

I am at the point in my game where I need to add a collision system. I tried jBullet, and while it did work, it wasn't what I was looking for. I just want a simple way to test if two oriented bounding ...
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1answer
650 views

Game object position issue in unity3d

I have a set of objects placed on the same layer where all the objects are invisible except one. When I drag an object into a selected area, the current dragged object gets destroyed, and the object ...
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1answer
14 views

onTriggerEnter(Collider obj) is not invoked on collision with a trigger or a rigidbody

void onTriggerEnter(Collider other){ if (other.gameObject.CompareTag("Pick Up")) { other.gameObject.SetActive(false); count = count + 1; setCountText (); } This ...
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46 views

Player collision with object

so I have an fps controller, and I want to change camera when it collides with a box collider. I think I did it properly but it didn't work. Here's my code. using UnityEngine; using ...
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236 views

LibGDX - Tilemap Wall Collision Detection Issues

I cribbed some code from another web tutorial (SuperKoalio - https://github.com/libgdx/libgdx/blob/master/tests/gdx-tests/src/com/badlogic/gdx/tests/superkoalio/SuperKoalio.java) about detecting a ...
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84 views

How to handle collision detection

So the way that I am doing the movement for my game is that you can left click a unit (which is just a rectangle object), and then it is selected. While it is selected, you can right click and that ...
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37 views

Game Physics: Calculating a collision response using the Separating Axis Theorem?

I am working on a project in which I have implemented the Separating Axis Theorem to detect collisions between objects. My current collision response is an object that contains whether it is ...
2
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1answer
595 views

Using PhysX, how can I predict where I will need to generate procedural terrain collision shapes?

In this situation, I have terrain height values I generate procedurally. For rendering, I use the camera's position to generate an appropriate sized height map. For collision, however, I need to have ...
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2k views

Find closest point on NavMesh if current target unreachable

I have a mock environment set up with a cube that has a specified "Not Walkable" layer. I'm using NavMeshAgent and NavMeshPath to set destinations of the player. The way I'm setting paths is by ...
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125 views

Libgdx rotate sprite with collision

Im making a game where I have an object in the center of the screen and then balls come out from the sides of the screen. When you touch the screen the object rotates 90 degrees clockwise and it has ...
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1answer
37 views

Bouncing from any object after collision JavaScript

I'm trying to make a ball bounce off some obstacles after a bounding box + pixel by pixel collision. Somehow, sometimes the ball is not going in the direction it is supposed to be. If the ball is ...
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1answer
494 views

3d Wall sliding collision

I'm working on collision for walls in my game and the way I currently have it I get stuck walking into a wall. I'm trying to make my character slide on the walls but still collide. My character moves ...
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Handle floating point precision errors in collision detection and resolution

I am experimenting with a continuous collision detection and response of points on a tile map. This are my results for now: I did this by shooting a ray (red line) from the current position (red ...
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1answer
67 views

Color Based Collision Javascript (Cocos2d-js)

Im looking to make an isometric game...so my partner designed the isometric map (jpg image) along with the map objects (png) on adobe ilustrator... so the thing is i would like to set the player path ...
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1answer
145 views

Moving a Polygon based on Camera position

I am in the process of implementing TMX Maps (made in Tiled) for my game. In Tiled, I can create polygons, which leaves a tag, containing the points. Loading in these points to a Polygon ...
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35 views

Question regarding simplification of world creation and collision (VISUAL BASIC)

In my computer programming class we are creating our own top down adventure games in Visual Basic. Currently I have been able to have the player appear on screen and collide with a block on the ...
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2answers
412 views

Sprite Kit - containsPoint for SKPhysicsBody?

I have a ball bouncing around the screen. I can pick it up and drag it onto a "bucket". When my touches finish, I use the containsPoint function to check and see if I have dropped the ball onto the ...
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64 views

Pixel by pixel collision detection pinball

I'm currently working on a Pinball game using the HTML5 Canvas and JavaScript. Right now I'm getting a hard time with the pixel by pixel collision, which is fundamental because of the flippers. Right ...
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1answer
691 views

Swinging a sword in Xcode with Sprite Kit

I'm working on making an RPG in Xcode, and I'm having a major gameplay issue when it comes to having my character swing his sword in a way that is realistic and gameplay compatible. Right now, when ...
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1answer
118 views

Jumping onto higher ground Collider issues

What's the general solution to the following character animation problem (I'm using Unity)? You have a character with a capsule collider and a jump animation that allows you to jump onto higher ...
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Microsoft XNA Platformer Example, is the Collsion Detection implemented accurately?

The example provided by Microsoft seems as if the collision detection (from what I can see) will have a small error. When the user collides with an Unpassable tile, the depth of the intersection is ...
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2answers
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Moving towards and switching targets in Unity with collision

I have these nodes set up for a ship to move towards over time with out looking stops then repeats in a sequence. like so: 1 2 3 1 2 3 1 2... THE PROBLEMS i keep having either come from the ...