A process of adjusting game objects position after collision.

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1answer
86 views

collision between two objects

to test collision i am using intersect function. if(this.getBounds_ball().intersects(this.getBounds_rect())) { but the problem is i dont know how to test where the ball is collision from. i was ...
0
votes
1answer
79 views

collision test between ball and rect [closed]

need help with collision between ball and rect. i dont know how to test if ball hit the rec from top, bottom, right or left. x = ball x y = ball y radius = ball width and height rx = rect x ry = rect ...
-1
votes
1answer
243 views

Pixel perfect collisions for platforms

i'm trying to do a pixel perfect collision but i don't know how to handle collisions when there is a jump . Here i have one image of a sample map: But maybe I've done a bad supposing all pixel like ...
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votes
2answers
311 views

Tile Based Collision Checking In Java?

I have my map stored in 2 arrays: Tiles : Tile names TileTypes : SOLID or BASIC I want to be able to walk through BASIC Tiles (Like ground tiles). But not the SOLID Tiles (Like wall tiles). I ...
4
votes
1answer
126 views

Collision Response: game character vs. density function

Introduction I am working on my own "novelty" game-engine project, where the world is represented by a continuous density function. It has only one interface, a function that returns the density at a ...
2
votes
1answer
298 views

Collision Resolution: How to avoid Interpenetration/Tunneling Caused by Prior Collision Handling? [duplicate]

My game processes world collisions followed by entity collisions. The problem here is that entities can break through walls the next frame when world checks are run again as a result of the prior ...
2
votes
1answer
290 views

Get intersected volume of two planes in 3D

I'm working on AABB - AABB collision response and I'm having trouble figuring one part out. My situation is as follows (see image). I have a player AABB (blue) and an object which collides (brown). ...
1
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1answer
783 views

How to detect screen boundary using AndEngine GLES1?

I am using the AnalogOnScreenControl to move my sprite around the screen. I would like to restrict the sprite so it can not move outside the screen boundaries. I have tried putting a line at the ...
1
vote
1answer
698 views

2D tile-based collisions: using different methods by tile?

I'm trying to write a collision handling method that handles each of the 9 potentially colliding tiles (the player's and the 8 around him) differently according to a "CollisionType" value attached to ...
0
votes
1answer
336 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 ...
2
votes
1answer
758 views

How to calculate collision normal between two AxisAlignedBox's?

I'm writing a physics simulation in Ogre3D and I'm trying to figure out how to calculate the collision normal between two Ogre::AxisAlignedBox's. I am checking for collisions using the "intersects" ...
13
votes
3answers
2k views

Resolving a collision with forces

In my 2D physics engine, I can detect AABB vs AABB collisions, and resolve them by finding the shortest penetration vector and adding it to the AABB's position. Doing this "pushes" the first AABB ...
1
vote
1answer
263 views

Slide effect in voxel collisions

I'm making a voxel engine, and I'm trying to figure out the right way to make efficient collisions with a slide response (making the player slide against the wall). Currently my collisions are pretty ...
6
votes
3answers
387 views

Calculating impulse propagation through a rigid body after a collision

I'm working on a game. I need to work out what the impulse is at different points on a body as a result of a collision. For example, in the following diagram, if there is a collision that results in ...
1
vote
2answers
723 views

Find the Contact Normal of Rectangle Collision

It seems a lot of people have asked similar questions on this site, and every time it seems like a whole bunch of answers that don't work are given. Basically, I have two rectangles (AABBs) that ...
3
votes
1answer
541 views

Meaning of offset in pygame Mask.overlap methods

I have a situation in which two rectangles collide, and I have to detect how much did they collide so so I can redraw the objects in a way that they are only touching each others edges. It's a ...
1
vote
1answer
200 views

Confusing with an articles wording on Clamping a Vector2

I have been reading an article on Collision Detection and how to resolve it. http://www.wildbunny.co.uk/blog/2011/04/20/collision-detection-for-dummies/ In the section describing an AABB vs Circle, ...
0
votes
0answers
384 views

Separating axis theorem implementation flaky minimum translation vector based on triangle orientation

I've implemented some collision detection using separating axis theorem. Works fine for axis-aligned rectangles and two out of four possible right triangle orientations. For some reason when the ...
4
votes
2answers
980 views

XNA 4.0 / C# Collision Response

Okay, this is really starting to annoy me. First of all, detecting collisions is nice and easy. I have a list of tiles, and a player. The player and each tile have their own rectangles. (The tiles ...
0
votes
2answers
173 views

Why does this collision detection & resolution code only work for one side?

I am having a bit of trouble with my collision detection. It only works correctly for the right side, meaning, if I enter the tile from any other side, it brings me to the right side. Here is my ...
4
votes
1answer
343 views

How to handle collision resolution in a top-down car game?

I have a top-down car game which takes place in an arena. The game is very very light on physics, so I'm not actually using a physics engine. The cars' movement is mostly managed by a struct I called ...
4
votes
2answers
171 views

Why is my collision resolution failing on the corners?

I'm tearing my hair out trying to work out how to handle my collision resolution at the corners of the rectangles that I'm colliding with. The code that I'm working with is: class Player(object): ...
-1
votes
2answers
280 views

My 2D collision code does not work as expected. How do I fix it?

I have a simple 2D game with a tile-based map. I am new to game development, I followed the LazyFoo tutorials on SDL. The tiles are in a bmp file, but each tile inside it corresponds to an internal ...
3
votes
1answer
506 views

Collision resolution - Character walking on ascendent ground

I don't know if the solution to this problem is quite straight-foward but I really don't know how to handle collision resolution on a game where the player walks on an ascendent floor which is not ...
1
vote
2answers
469 views

How can I get accurate collision resolution on the corners of rectangles?

I have a working collision system implemented, and it's based on minimum translation vectors. This works fine in most cases except when the minimum translation vector is not actually in the direction ...
2
votes
2answers
174 views

Typical collision detection

I would like to know how is the typical collision detection of most games. For example, you control a character which can move in 2 dimensional directions (except up and down). Now lets asume he walks ...
1
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1answer
428 views

How to make a stack stable? Need help for an explicit resting contact scheme (2-dimensional)

Previously, I struggle with the sequential impulse-based method I developed. Thanks to jedediah referring me to this paper, I managed to rebuild the codes and implement the simultaneous impulse based ...
1
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1answer
532 views

How do 2D physics engines solve the problem of resolving collisions along tiled walls/floors in non-grid-based worlds?

I've been working on implementing my SAT algorithm which has been coming along well, but I've found that I'm at a wall when it comes to its actual use. There are plenty of questions regarding this ...
5
votes
1answer
339 views

Move penetrating OBB out of another OBB to resolve collision

I'm working on collision resolution for my game. I just need a good way to get an object out of another object if it gets stuck. In this case a car. Here is a typical scenario. The red car is in ...
1
vote
1answer
140 views

Help with Collision Resolution?

I'm trying to learn about physics by trying to make a simplified GTA 2 clone. My only problem is collision resolution. Everything else works great. I have a rigid body class and from there cars and ...
7
votes
3answers
925 views

Collision Detection Game Design and Architecture

I've reading some articles about collision detection. My question here is about ideas on the design for it. Baically I have a C++ game that has a main loop with entities with an update method. Based ...
1
vote
1answer
1k views

2D OBB collision detection, resolving collisions?

I currently use OBBs and I have a vehicle that is a rigid body and some buildings. Here is my update() private void update() { camera.setPosition((vehicle.getPosition().x * camera.getScale()) - ...
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votes
1answer
254 views

XNA 2D vehicle wall collisions

I am attempting to implement collisions for my truck game, where the truck can drive around the world and hit walls surrounding the level and various randomly placed walls within the level. I am able ...
1
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2answers
518 views

Circle vs Edge collision detection / resolution [closed]

I made a javascript class Ball.js that handles physics interactions betweens balls as well as painting. In the v1.0, the ball vs ball collision detection and resolution is well handled. In the next ...
7
votes
4answers
296 views

Need efficient way to keep enemy from getting hit multiple times by same source

My game's a simple 2D one, but this probably applies to many types of scenarios. Suppose my player has a sword, or a gun that shoots a projectile that can pass through and hit multiple enemies. ...
5
votes
1answer
2k views

Circle-Rectangle collision in a tile map game

I am making a 2D tile map based putt-putt game. I have collision detection working between the ball and the walls of the map, although when the ball collides at the meeting point between 2 tiles I ...
1
vote
1answer
424 views

Simple (and fast) dices physics

I'm programming a throw of 5 dices in Actionscript 3 + AwayPhysics (BulletPhysics port). I had a lot of fun tweaking frictions, masses etc. and in the end I found best results with more physics ...
3
votes
3answers
179 views

Collision and Graphics integration

I'm a little confused about the integration between collision and graphics. They both need to share the same position in the world. The most obvious choice is the center of the entity, which is good ...
6
votes
2answers
2k views

How to implement friction in a physics engine based on “Advanced Character Physics”

I have implemented a physics engine based on the concepts in the classic text Advanced Character Physics by Thomas Jakobsen. Friction is only discussed very briefly in the article and Jakobsen himself ...
3
votes
1answer
482 views

2D Motocross physics

I'm looking into making a 2D motocross bike game with plausible physics. It should look like this: For a first try, I've created only the player (a motocross driver) and the map (consisting of ...
3
votes
3answers
2k 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 ...
0
votes
2answers
438 views

using per pixel collision for an elastic response

I realize this might be open ended ended but curious if I just did some over kill... I had this http://xbox.create.msdn.com/en-US/education/catalog/tutorial/collision_2d_perpixel and i reworked it ...
2
votes
3answers
263 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 ...
2
votes
1answer
191 views

How can I resolve collisions at different speeds, depending on the direction?

I have, for all intents and purposes, a Triangle class that objects in my scene can collide with (In actuality, the right side of a parallelogram). My collision detection and resolution code works ...
2
votes
2answers
274 views

How should I do my collision response?

I'm making a small lockpicking simulator. Obviously I'll need the pick to not pass through the lock, and I'll need the pins to move when you tap or push them with the pick. Here's what I have so far, ...
4
votes
1answer
2k views

Collision with tile corners/seams in 2D platformer

There seems to be a lot of somewhat related questions answered already, but none I read answered my exact problem. I have a 2D platformer whose world is made entirely out of tiles that are in a ...
3
votes
2answers
467 views

Collisions between moving ball and polygons

I know this is a very typical problem and that there area a lot of similar questions, but I have been looking for a while and I have not found anything that fits what I want. I am developing a 2D ...
3
votes
1answer
394 views

SAT and then what?

I am on my way to make another Arkanoid game but this time I decided that I want it a little bit more realistic than just checking intersections between AABB and inverting one vector's component on ...
6
votes
3answers
4k views

Implementing Separating Axis Theorem (SAT) and Minimum Translation Vector (MTV)

I was following codezealot's tutorial on SAT and MTV and trying to implement it myself but I've come a cropper when it comes to getting the correct MTV. Here is my example: (Cue pretty pictures...) ...
3
votes
2answers
802 views

How do I avoid 3D AABB collision response getting stuck at block edges?

I want the player to be able to slide along cubes, but without getting caught at the seam between 2 adjacent cubes. I've gotten it so that I can do x collision, with sliding, and y, and z, but I ...