The determination of whether or not two or more entities make contact with each other during gameplay.
4
votes
1answer
324 views
Collision Detection with SAT: False Collision for Diagonal Movement Towards Vertical Tile-Walls?
I'm developing my first tile-based 2D-game with Javascript. To learn the basics, I decided to write my own "game engine". I have successfully implemented collision detection using the separating axis ...
3
votes
2answers
468 views
how to solve ArrayList outOfBoundsExeption?
Im getting:
09-02 17:15:39.140: E/AndroidRuntime(533): java.lang.IndexOutOfBoundsException: Invalid index 1, size is 1
09-02 17:15:39.140: E/AndroidRuntime(533): at ...
2
votes
1answer
176 views
Colored Collision Detection
Several years ago, i made a fast collision detection for 2D, it was just checking a bullets front-pixel's color to check if it were to hit something. Lets say the target rgb color is (124,200,255) ...
0
votes
1answer
142 views
Checking collision of bullets and Asteroids
I'm trying to detect collision between two list of bullets and asteroids. The code works fine, but when the bullet intersects with an asteroid, and that bullet passes through another asteroid, the ...
1
vote
3answers
382 views
Collision detection doesn't work for automated elements in XNA 4.0
I have a really weird problem. I made a 3D simulator of an "assembly line" as a part of a college project. Among other things it needs to be able to detect when a box object passes in front of sensor. ...
1
vote
1answer
193 views
Grid based collision - How many cells?
The game I'm creating is a bullet hell game, so there can be quite a few objects on the screen at any given time. It probably maxes out at about 40 enemies and 200 or so bullets. That being said, I'm ...
0
votes
1answer
126 views
Gravity stops when side-collision detected [closed]
Please, look at this GIF:
The label on the animation says "Move button is pressed, then released". And you can see when it's pressed (and player's getCenterY() is above wall getCenterY()), gravity ...
1
vote
1answer
1k views
Resolving bounding box collision detection
I'm working on a simple collision detection and resolution method for a 2d tile-based bounding box system. Collision appears to work correctly, but I'm having issues with resolving a collision after ...
0
votes
2answers
1k views
How to handle 3D collisions using raycasting (with a reflection vector?)
I'm making a game using THREE.JS, and I want my character to walk on the terrain, and collide with static 3D objects (=AABB boxes) that are on that terrain.
The problem is: THREE.JS has only a ...
4
votes
1answer
3k views
How to detect collision in Unity3D without rigid bodies?
The target platform of my game is mobile devices therefore I try to develop it performance oriented. It will be a strategy game so I don't really need physics in it, consequently I did not add ...
0
votes
1answer
243 views
Bullet impact or force on cube in Blender
Hoping someone here may be able to help. I'm new to Blender (and game development/3d modelling) and have been following some tutorials online to get me started. I am building a very basic FPS just to ...
5
votes
2answers
286 views
Multiple collisions within a single frame cycle?
So say you want to simulate several objects in two dimensions, just bouncing around in a finite space. Using AABB and sweep tests, it shouldn't be that complicated to calculate single collisions ...
0
votes
0answers
205 views
Java Collision Detection of a Slope using a Gradient [closed]
Im testing out collision detection for a game, The ball is traveling and i need to know when the ball hits a sloped line.
For this example i have used the whole screen, with a sloped line going from ...
2
votes
2answers
207 views
jQuery game - collisions
Please take a look at the picture below:
It is and attempt in creating a "game" only with the DOM and jQuery.
The blue boxes are "obstacles" and the user can move his pointer (not drawn in screen ...
0
votes
0answers
108 views
Incorrectly says that 2 rectangles collide: whats going wrong?
I am using and expanding a function that detects whether two 2d rotated rectangles collide. The function is from here.
My Problem: The function incorrectly detects a collision between the following ...
1
vote
1answer
740 views
Raycasting Collision Detection
I need to check for collisions when firing a bullet, but I have a few questions first. My game is 2D and tile based, it also uses the XNA framework. From what I've read raycasting or continuous ...
1
vote
0answers
62 views
obb vs obb and resolve/response for 2d space game [duplicate]
Possible Duplicate:
OBB vs OBB Collision Detection
How can i detect if an rotated obb intersects another
rotated obb and resolve it so both obb objects dont go further into each other.
I ...
3
votes
2answers
328 views
Collision library for bullet hell in Python
I am making a bullet hell game in Python and am looking for a suitable collision library, taking the following into consideration:
The library should do 2D polygon collision.
It should be very fast. ...
1
vote
2answers
401 views
XNA How to detect collision between 2d sprites and 3d primitives (not models)
My current status:
I have already read some tutorials about 3d collision
I know how ray trace works and how to convert mouse follow a vector to track the closest object that collides with out vector
...
1
vote
1answer
155 views
Game Engine Collision Handler
I'm making a collision handler for a Java game engine. I made an interface called Collidable. I have a method called onCollision which takes the parameter of my Engine Game Object.
public void ...
0
votes
2answers
355 views
When to Use Collision Detection Methods
I've done some research into different collision detection methods but I don't know when I should be using one over the others. Some I've seen are:
Continuous Collision Detection (CCD) or Raycasting
...
1
vote
1answer
270 views
Ball bouncing at a certain angle and efficiency computations
I would like to make a pong game with a small twist (for now).
Every time the ball bounces off one of the paddles i want it to be under a certain angle (between a min and a max). I simply can't ...
-1
votes
1answer
331 views
How do I perform collision tests between two 3D oriented bounding boxes?
I want to test two 3D oriented bounding box objects against each other and stop them if there is a hit detected.
How can I accomplish this using only the collision detection functions in the Bullet ...
6
votes
1answer
519 views
Creating custom collision map for 2D
I have a 2D level that I have built in my map editor, and I was wondering the best way to create a collision map for it.
I have a collision map layer in my map editor, which saves each node (for ...
2
votes
2answers
368 views
Do I have too many colliders on my screen?
I'm running into a situation where my frame rate drops from 70 FPS (on my desktop computer) down to 5 FPS (on my iphone) and I'm trying to understand why. At the moment, I'm only drawing simple ...
0
votes
1answer
319 views
2D Tile Based Particle Collisions
I have a basic 2D particle system and I'm now looking to implement collisions, however I'm not sure on what the best way to do it is. My game is tile based and runs in XNA Game Studio 4.0. I've seen ...
4
votes
2answers
755 views
Collision detection and response in an Entity System
More fun with an ES...
Currently, I have a few systems:
Renderer (Renderable attribute, Transform attribute)
Motion (Movable attribute, Transform attribute, Renderable attribute [for bounding ...
-1
votes
1answer
127 views
Circle collision with a specific tile on a grid
Does anyone know of a good tutorial that will show collision detection on a 2d game platform without using any engines?
1
vote
2answers
441 views
Checking collision in an array - is there a better way?
MSDN suggested this, but I'm worried about it slowing down the game when there are a lot of objects to check:
for (int i = 0; i < enemy.Length; i++)
{
if (enemy[i].isActive)
{
...
3
votes
1answer
213 views
What algorithms exist for generating collision geometry from an image?
I am currently working on a game using SFML and Box2D. I am interested in generating collision geometry from the sprite data that I load into SFML. So, for example, an algorithm that would do this ...
3
votes
2answers
618 views
Circle-Rectangle collision resolution
I have a non axis aligned rectangle, like a car, in my game. I have to check and resolve the collision between the rectangle and circle, which is stationary.
I have found lots of ways to determine ...
3
votes
3answers
2k views
Simple 2D Collision Detection Algorithm Library
I'm building a simple OpenGL game and I was looking for some simple collision detection library for objects like squares, triangles and circles. Any suggestions?
PS: Preferably a library that is very ...
2
votes
2answers
997 views
How do I tell if an object is currently colliding with another object?
I know this sounds simple, but I can't figure out how to tell if a GameObject is currently colliding with another object in Unity. I've looked online, but can't find any tutorials or answers that ...
1
vote
2answers
544 views
Java: Tile-based Collision Detection with Rectangles
There are a few tile-based collision detection questions out there, but none seemed to suit my need.
I guess I really would like to know why this method for collision detection isn't working.
It ...
3
votes
3answers
218 views
Physics System ignores collision in some rare cases
I've been developing a simple physics engine for my game. since the game physics is very simple I've decided to increase accuracy a little bit. Instead of formal integration methods like fourier or ...
0
votes
1answer
351 views
Cocos2d Box2d contact listener call different method in collided object
I have the building object, wen it hit with other, i want to call some method inside it.
Building.mm
-(void)printTest
{
NSLog(@"printTest method work correctly");
}
in my ContactListener i ...
0
votes
1answer
635 views
Android Touch Event Collision Detection [closed]
I'm relatively new to both Java and Android, so hopefully the problem I'm having is stemming from something pretty minor that I've overlooked.
I've got a (very early stage) game that I've started ...
3
votes
3answers
504 views
Interpolate and collisions
Lets take the simple example of a ball bouncing off a wall. The physics is separated from the display. The physics is set to run at say 20 frames per second and the display is running faster than this ...
2
votes
3answers
181 views
Collision organization problems
I just started playing around with c++ and some SFML. I'm going to create a 2D game with top view to test my ability and I came across a very big problem: collision detection and physics. So I see at ...
-1
votes
2answers
165 views
Collision detection not working properly
I have some problems with collisions, the collision detection only works either on one x "line", or on one y "line".
Example
Heres the collision code:
public void checkCollision() {
for (int i ...
-1
votes
2answers
262 views
How should I learn about collision detection?
If I want to use physics engine for my game then how should I go to learn collision-detection algorithms?
When I read AI book for games, the book talks about collision detection, so I want to learn ...
2
votes
1answer
165 views
What data should a generic collision detection system gather?
I'm working on a relatively generic 2D AABB collision detection system for a game engine, and I've re-written it more times than I'd like to admit due to not calculating/recording specific details of ...
0
votes
0answers
71 views
Creating id matrix/map for collision
The title might be a bit misleading but I don't know what to call it exactly.
I have several objects that need to do certain collision checks ( like bullets hitting enemies but not the player).
I ...
0
votes
2answers
136 views
Collision on the first rectangle only - Why?
I've made a very simple collision detection, it works fine. However when i decided to load in all my rectangles into a list and then give each of them collision, it only adds it to the first one. Any ...
5
votes
2answers
301 views
What's the reason behind collision-boxes?
I was surprised that some games use extra models called collision-boxes for collision. What is the benefit of doing so? Can't we calculate collisions between the vertices of any game model? Is this ...
0
votes
3answers
1k views
collision resolve sphere-aabb and aabb-aabb
I am currently working on a basic physics engine which does not consider rotations.
At the moment I work on collision resolving between aabbs and spheres.
Unfortunately I have no idea what a collision ...
-1
votes
1answer
235 views
Collision Detection Failing at faster Speed?
I am new to programming so thought I would make a Pac-Man clone to teach myself. I am doing it in C++ using SFML. Anyway, I use a bunch of collision tests. Everything works great.. but if I am going ...
0
votes
2answers
360 views
Platformer movement and collisions
I'm working on a platformer but I'm stuck at the player movement and collisions.
Right now I'm not including the grid at all in the movement, but it's time I do it. I've read this article on how to ...
4
votes
1answer
469 views
Efficient physics and collision detection for RTS
I'm thinking about writing my own RTS game and while I'm more or less clear about how the game engine should work, I need some directions as to how to implement physics and collision detection.
Now, ...
2
votes
2answers
301 views
How create a respawn area in a tiled map
I'm creating a RPG game, I need to create a monster respawn area like the Pokemon games where if I walk through the long grass areas a Pokemon can appear. I already created the battle scene, I've seen ...
