The determination of whether or not two or more entities make contact with each other during gameplay.

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1answer
15 views

Saving resource

I'm trying to develope a simple platformer on Java, I was wondering if is it better to handle the collissions in a level (player with floor, player with enemy ecc...) by a level handler class which ...
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0answers
26 views

Collision Detection and Response Woes [on hold]

I've been trying to implement the collision detection and response detained in this paper: http://www.peroxide.dk/papers/collision/collision.pdf After pretty much copying the code line for line some ...
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1answer
256 views

How do I detect a tile map collision's direction?

I'm implementing collision detection with the map for my platformer. I have a method that generates a polygon on every tile and checks if the player hits it -- that's all fine. The problem is that ...
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1answer
52 views

How to retrieve a cube collision by faces

I work for a while on a minecraft game (voxel). I am front a problem for a long time about the collision detection. I want recover the cubes collision from my highlighted black's cube like on the ...
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1answer
175 views

Sprite collision with color?

Is this possible? To elaborate, I am making a PacMan offshoot. Essentially it is a "zoomed in" version of the game, but the board is randomly generated. I have 11 .png files each to be used as a ...
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1answer
44 views

Is this Possible to force gameobjects (coliders etc) to get stretched based on the aspect ratio of the screen?

Well with unity3D, I am in big trouble whenever I use sprites. As for textures I compensate for a evener look by Stretching it (Screen.width & Screen.height- that's fine for low end 2D games). Now ...
3
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1answer
534 views

Collision detection with heightmap based terrain

I am developing a 2D tank game. The terrain is generated by Midpoint Displacement Algorithm, so the terrain is represented by an array: index ---> height of terrain [0] ---> 5 [1] ---> ...
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1answer
213 views

Collision in PyGame for spinning rectangular object.touching circles

I'm creating a variation of Pong. One of the differences is that I use a rectangular structure as the object which is being bounced around, and I use circles as paddles. So far, all the collision ...
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0answers
39 views

Java game 2d rectangle collision [on hold]

I've been working on a school-project and I've been working quite hard. The thing is, the collision detection I've been trying does not. :( I am doing all the rendering rendering with ...
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1answer
51 views

How to stop characters running in to each other? [duplicate]

I am new to pygame and am creating a small game in which players can push each other to go outside the given arena to score points. I have a problem in detecting when characters run in to each other. ...
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1answer
42 views

JBullet - Detecting when 2 objects collide?

How can I detect when 2 collision objects collide with JBullet? Currently, all body types are going to be of type RigidBody. I have quite literally been trying to find the answer of this for over 2 ...
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1answer
190 views

Collision detection with multiple polygons simultaneously

I've written a collision system which detects/resolves collisions between a rectangular player and a convex polygon world using the Separating Axis Theorem. This scheme works fine when the player is ...
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votes
2answers
457 views

How can I tell what a rectangle intersects with?

I understand XNA's Rectangle class is rather limited, but surely there is a way to tell what a Rectangle is intersecting with? If I had Rectangle boundingBox = new Rectangle(stuff here); how would I ...
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1answer
139 views

Detecting walls or floors in pygame

I am trying to make bullets bounce of walls, but I can't figure out how to correctly do the collision detection. What I am currently doing is iterating through all the solid blocks and if the bullet ...
1
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1answer
58 views

3D collision physics. Response when hitting wall, floor or roof

I am having problem with the most basic physic response when the player collide with static wall, floor or roof. I have a simple 3D maze, true means solid while false means air: bool ...
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2answers
94 views

Collision detection via adjacent tiles - sprite too big

I have managed to create a collision detection system for my tile-based jump'n'run game (written in C++/SFML), where I check on each update what values the surrounding tiles of the player contain and ...
1
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0answers
40 views

Storing rigid body collision shapes in local or world coordinates

I'm writing the beginnings of a lightweight 2d rigid body engine (in javascript, as a hobby project), and i'm debating whether to store collision shapes in local or in (updated as needed) world ...
2
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2answers
59 views

Can I make a character solid but not lose non-physics behaviour?

My character can walk around in the world, but walks through other objects, for example a cylinder (stand-in for a cannon). To fix this I added a capsule collider to each of the character and ...
2
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1answer
728 views

Help with Collision of spawned object(postion fixed) with objects that there are translating on screen

Hey guys I am creating a game using Corona SDK and so coding it in Lua. So there are 2 separate functions, To translate the hit objects and change their color when they are tapped The link below ...
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1answer
128 views

How to prevent a sprite to move in an angle that will lead to collision

I have two sprites that can move in any angle. The sprites are rectangular. I created bounding boxes for both the sprites. These boxes rotate whenever the sprite rotates. They always surround the ...
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1answer
59 views

Java Game Gravity Collision Detection Working Incorrectly

I have searched for this question but was unable to turn up any results - I am making a Java platform game (I have created many top-down games, but nothing with gravity like a platformer) and I have ...
2
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1answer
76 views

Detect obstacles in path on a tile-based map

I'm creating a 2d game with a tile-based map, but smooth movement. I currently use A* in combination with some other tricks for pathfinding, and one issue what I've been dealing with is getting the ...
0
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1answer
45 views

How can I determine if an object hit the top of a tile rectangle in MonoGame? [duplicate]

I've been implementing an AI system in my 2D game using MonoGame. In some situations when a collision between two objects occurs, I need the NPC to move in different directions depending on the ...
3
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0answers
122 views

How to run a Phaser engine without a window?

I'm currently creating a multiplayer game using the HTML5 framework Phaser. It's a game where zombies spawn on the map and players have to shoot them to kill them. The zombies target players that are ...
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2answers
184 views

libgdx - collision detection with tiled map java

currently, I am working on a 2d rpg game which is similar to final fantasy 1-4. I can load up a tiled map and the sprite can walk freely on the map. However, I will like to create a wall for it to ...
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1answer
23 views

LibGDX: Miscalculated polygon collision

These 2 polygons are not colliding, though this method returns true: Intersector.overlapConvexPolygons( new float[]{ 100.0f, 750.0f, ...
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2answers
94 views

SAT - How to find Shortest line between two static convex 2D Polygons

I have a pretty standard SAT algorithm that seems to successfully be detecting collisions.. but now I am looking for some assistance in finding the Shortest line between 2 separated Polygons. I ...
8
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2answers
324 views

How can I prevent rigid bodies from moving through each other using Unity's built-in physics?

I'm trying to create a game where objects can be dragged, but I'm having trouble with the physics. With rigid bodies that have similar masses, they sometimes push through each other when dragged and ...
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1answer
826 views

Android Bitmap: Collision Detecting

I am writing an Android game right now and I would need some help in the collision of the Pawns on screen. I figured I could run a for loop on the Player class with all Pawn objects on the screen ...
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0answers
50 views

Collision Avoidance/Steering around moving obstacles

I've done a decent amount of research and I've read up on pathfinding algorithms and such, but I can't seem to find anything to do with the mentioned behaviors when moving around obstacles that also ...
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1answer
216 views

Box2D Static-Dynamic body joint eliminates collisions

I have a static body A, and a dynamic body B, and a dynamic body C. A is filtered to not collide with anything, B and C collide with each other. I wish to create a joint between B and A. When I ...
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2answers
290 views

What kind of physics to choose for our arcade 3D MMO?

We're creating an action MMO using Three.js (WebGL) with an arcadish feel, and implementing physics for it has been a pain in the butt. Our game has a terrain where the character will walk on, and in ...
0
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1answer
90 views

How to find objects in front of my player

I am trying to find an object that is in front of my player sprite using the following code RaycastHit2D hit = Physics2D.Raycast(transform.position,Vector2.right,EnemyLayer); //EnemyLayer is the ...
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0answers
32 views

2D Collision in JavaFX - Bad accuracy with .intersects()

I have several Shape objects - Circle, Rectangle and Polygon. I use the built-in .intersects(Bounds1, Bounds2) method to detect collision but it's quite inaccurate. Circle c1 = new Circle(20); ...
2
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1answer
548 views

Pixel Perfect Collision Detection in Cocos2dx

I am trying to port the pixel perfect collision detection in Cocos2d-x the original version was made for Cocos2D and can be found here: ...
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1answer
62 views

How do I add a Rigid body and a box collider component to a Texture2D?

I am making a snake game. I'm basing it on a basic tutorial game, which does no collision detection, wall checking or different levels. All snake head, piece, food, even the background is made of ...
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0answers
39 views

Moving object next to another object

Is there a common way to get to game objects with colliders to 'touch' each other without trying to reach the same position? I dont want to move object A to the position of object B cause they will ...
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1answer
229 views

Circle vs. Rect Collision accuracy problem

The blue ball is dynamic and is supposed to bounce off the walls, as well as the rectangle. Currently, the green rectangle is adding an invisible line to the scene, which doesn't let my ball go where ...
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1answer
77 views

2D Rectangle Collision

I want to make a small 2D game. In the game you can go in all directions(with the bird's-eye view) and can shoot. (A little bit like BoxHead http://de.y8.com/games/box_head_2play) My problem there is ...
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1answer
125 views

How do I handle collision response between many different types of game objects?

I am looking for a way to avoid the dreaded switch or if/else scenarios between numerous game object types when a collision takes place in a game. For example: You have a list of game objects which ...
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1answer
53 views

Calculating the point(s) at which two moving objects are a certain distance from each other

Problem This is similar to a Closest Point of Approach calculation, but instead of the closest point(s), I want the points at which the objects are a given distance away from each other. (Imagine two ...
0
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1answer
122 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 ...
0
votes
1answer
81 views

Why is mesh baking causing huge performance spikes?

A couple of seconds into the gameplay on my Android device, I see huge performance spikes caused by "Mesh.Bake Scaled Mesh PhysX CollisionData" In my game, a whole level is a parent object containing ...
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0answers
59 views

How can I align a 2D object properly using tilemap collision

I'm making a mario clone, and I have been working on the collision but I can never seem to get it right. I started out with "true/false" collision, aligning the player at it's last position, and as ...
2
votes
1answer
93 views

C++ FPS game collision detection with partitioning system or physics engine?

I'm working on a small FPS game (as a hobby and for learning purposes, nothing else) built with C++ in OpenGL (from scratch). Documenting online on the kind of strategy someone would approach with ...
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2answers
188 views

How do I implement pixel-exact collision server-side?

Recently I made a 2D offline game with HTML5 Canvas and JavaScript. I'm detecting collisions by first checking whether image bounding boxes overlap. If they do, I check against the bounding boxes, ...
2
votes
2answers
86 views

Sweep collision between two moving spheres?

Say I have a scenario like this: Here I got two spheres (sphere A and B) that moves from on spot to another during a frame. How can I predict where these two collide if they collide at all? In ...
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2answers
102 views

Collision detection circle-segment-segment

I've already implemented collision detection in my game loosely following this tutorial, which works great, but I realized there's one major flaw. The player and the enemies are circles, while the ...
3
votes
3answers
116 views

Using uniform grids for collision detection - Efficient way to keep track of what a cell contains

I was looking for an efficient way to implement collision detection in a 2D game. A way that won't result in an O(n^2) level of complexity. A lot of people recommend to use Uniform Grids for this ...
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0answers
822 views

Why do restitution values less than one still cause infinite bouncing in Box2D?

I'm currently trying to implement basketball bouncing into my game using Box2d (jBox2d technically), but I'm a bit confused about restitution. While trying to create the ball in the testbed first, ...