A process of adjusting game objects position after collision.

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1answer
66 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: ...
1
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1answer
277 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 ...
0
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1answer
218 views

AABB Collision Problems in SFML

I have a problem with AABB collision. I am making a top down rougelike in SFML and my collision algorithm does't quite work properly. HERE IS A GIF OF THE PROBLEM. It mostly works, except for when ...
0
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1answer
62 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 ...
0
votes
1answer
20 views

Canvas/Paint Mechanic

I am currently working on an idea for a unity game app with a canvas mechanic. I understand I may have to use particles for the brush/paint f/x however I can not think of a way to add collision ...
0
votes
4answers
132 views

Lunar Lander calculating gravity, acceleration and collision in GameMaker

I've already asked this on the GameMaker forums but had no response so far. I'm making a little Lunar Lander game as my first foray in to GameMaker, I'm wanting to have the ship land and take off ...
0
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1answer
313 views

Cocos2d - Physics bodies randomly loosing Velocity along an axis after impact

This just started occurring and seems to randomly happen during, and between, game sessions. A dynamic moving body collides with a static body and instead of bouncing off looses (almost completely) ...
2
votes
4answers
2k views

Do two balls of different mass bounce different heights?

There are two balls and the only difference between them is the mass. Both are dropped from the same height on to the floor (static object with infinite mass), would both balls bounce up to the same ...
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2answers
81 views

How to make the character cannot pass through other randomly moving objects when they are collided?

As the title above, how can i make my random wallImg solid enough so that my birdImg cannot pass through it from any sides of the wallImg? Here's the code of Processing's Crappy Bird that i've altered ...
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1answer
422 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 ...
10
votes
2answers
5k views

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 ...
1
vote
1answer
665 views

Cocos2dx+Chipmunk: Fully elastic collision between moving bodies

I'm using Cocos2dx and the built in Chipmunk physics engine, and currently I've got my PhysicsBodys' materials set up with: Density=0 Restitution=1 Friction=0 in order to get fully elastic ...
13
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2answers
2k views

Storing coordinates of every object in server side in MMOs

In an MMORPG: Is it typical or feasible to store the coordinates of every tree, bush rock.. etc in the server side for collision detection? If so, what would be a feasible way to store such a huge ...
0
votes
1answer
210 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 ...
0
votes
0answers
21 views

Detecting collision between 2 convex meshes in 3D

For the past couple of weeks I've been trying to implement physics in my engine, and I am currently stuck on the collision detection phase. In short, I can perform a triangle-triangle intersection ...
0
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0answers
33 views

Doing collisions on both axis with java overlap

I'm making a top down game from scratch and just found out about the java rectangle overlap method that would work great for collisions. However, after the overlap happens, I need to check for which ...
0
votes
1answer
56 views

Collision between free player and tilebased map

so I'm working on some sort of platformer in javascript where the map is tilebased but the player can move freely. Now, i have a problem with collision detection/response. It's kind of obvious what ...
3
votes
2answers
321 views

2D Platformer AABB collision issues

Before anyone say that this questions already has a answer, I will list all the questions I read and tried: AABB collision resolution issues Trouble with AABB collision response and physics Hard ...
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vote
2answers
385 views

How to deal with pushing objects out of collision in a physics engine

I'm developing a 3D physics engine (I know, I should use one of the many good existing physics libraries, however my collision detection is optimised for objects with highly ordered highly complex ...
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0answers
50 views

Problem with collision detection also affecting collision resolution

Hi I am making a 2d scrolling beat em up, I am working on the collision with obstacles like drums and platforms. So far I have the player jumping and falling from platforms but having problem ...
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2answers
150 views

Can I make this physics simulation any faster?

I've made a little real time physics simulation that solves some bodies. CirclevCircle && CirclevOrientedRect I would like someone to tell me if I'm doing something drastically wrong. I know ...
-1
votes
3answers
472 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 ...
3
votes
2answers
445 views

Changing direction after collision

In the first tutorial for GameMaker (catch the clown), I want to set the direction of the clown after the collision with the wall. I want to do it by pressing the wall object with the mouse (before ...
3
votes
1answer
56 views

Collision resolution when moving in two directions

I am making a bomberman clone and I'm having problems regarding moving on both x and y axis (pressing down+left, down+right, up+left). Here is a video to demonstrate the problem. I use Tiled for the ...
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0answers
18 views

Collision Handling between two Sets of Polygons?

So I'm making a minecraft mod that allows you to build crafts out of blocks and move them around. I've been stuck on this issue for months now though, which is that I can't get the crafts to collide ...
0
votes
1answer
57 views

Tile-based collision problem with corners

I am currently making a tile based collision system. But I encountered a big problem I can't seem to figure out. Use the image bellow for reference. Gray lines represent the border between tiles. ...
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2answers
75 views

Collision works except for when coming from right side

I am trying to make a bomberman clone. I'm having problems with the collision on the walls that is not on the sides of the map (see image). When I come from the right (going left), the red square ...
0
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0answers
31 views

Circle velocities stay the same after elastic 2D collision

I am following this paper in trying to create elastic 2D collisions among two circles. The problem is that my end velocities are the same as my start velocities. I've looked over my code and don't see ...
0
votes
2answers
115 views

2D Collision Response

I am trying to implement collision response in my libgdx game. I'm using Rectangle objects as my bounbing boxes. This makes collision detection very easy, however I can't quite get the response ...
3
votes
1answer
124 views

Resolving collisions with float precision errors

I'm facing a problem when I try to resolve the collision between two units using floats as positions of the units in my game. I am detecting the collisions using the SweptAABB algorithm and if there ...
2
votes
1answer
89 views

Ball's velocity vector, reflect against a point

I need to calculate the new velocity vector when the ball collides with one of the paddle's corners. Let d be the velocity vector of the ball, r the target velocity vector and n the surface normal ...
0
votes
0answers
29 views

Touch and Collisions not working together in AndEngine when i set a custom Physics Handler

I have a set of custom sprites which implement a custom physics handler. The aim is to allow the user to move them by touch, then upon release they should act like a spring is connecting them to the ...
3
votes
1answer
135 views

How to prevent accelerating along wall during 2d sliding collision response

I'm writing a simple 2d physics system using a circle colliding with edges. When the user presses a key the circle's velocity is incremented by some amount in the direction they pressed. There is ...
3
votes
0answers
78 views

Is there an algorithm for collision resolution that factors in velocity?

I'm trying to program collision detection between moving convex polygons. To detect collisions, my program uses the GJK algorithm, and to resolve the collisions, it uses EPA. The problem with EPA is ...
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votes
2answers
176 views

Unity Renderer.bounds issue?

I would like to make rend.bounds.max.y be always equal to 20 on collision no matter what, using the script below. But it seems that I can't set it manually and the script has no effect on my ...
0
votes
1answer
34 views

2d Tile Based Collision Response

Right now I am trying to make a 2d collision response system for a platformer, and the algorithm I have for it works quite well. The only problem is that if the player is standing exactly on a tile, ...
1
vote
1answer
48 views

Collision resolution moving Point to AABB with raycasting

This is probably trivial, but I'm having trouble making it work. I have a 3-coordinate world of particles simulated with Verlet Velocity. I only care for collision between their centers and a few ...
0
votes
2answers
72 views

simple solution for 3d collision detection and response

I'm having great difficulty trying to implement collision detection and response in a 3d game What are some simple solutions someone can use to implement smooth collision and response similar to ...
3
votes
1answer
293 views

How do I deal with collision resolution causing another collision?

I'm making a simple 2D, top-view simulation of an evacuation, sprites running around, looking for exits, going at it, all that good stuff. I have no control over them when the simulation is running, ...
5
votes
1answer
132 views

Finding new position after collision with multiple colliders

What is the most accurate way to find the correct position to where a moving character should be re-positioned as a collision-resolution, after it has collided with multiple colliders? The figure ...
3
votes
2answers
235 views

How to calculate faces involved in collision (Separating Axis Theorem)

I have a game engine created in javascript (https://jsfiddle.net/4gqsq8wf/) which uses collision detection via the Separating Axis Theorem. Currently, it does not have any means of resolving velocity ...
2
votes
1answer
538 views

2D AABB vs AABB side of collision and collision depth

I realize there have been a multitude of questions involving 2D AABB vs AABB collision, but the questions and responses always avoid the simple questions that make it difficult. To keep things ...
6
votes
4answers
2k views

How do I restrict the movement of a point to within a radius of another?

I have a situation where a sprite's center point needs to be constrained within a certain boundary in 2D space. The boundary is circular, so the sprite is constrained within a radius. This radius is ...
1
vote
3answers
354 views

Collision Response in Entity Components Systems

This question seems to be a duplicate of mine, but I don't think it is. I'm trying to build a game using an ECS, but I want this ECS to be as simple as possible, therefore I am eschewing messages. ...
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0answers
41 views

Detecting the two Vector3 that determine the bottom-edge of the side of a box-collider that had collision (with C#)

So, I understand that plenty of questions have been posted on how to detect which side of a Box Collider had collision. However, what I am trying to achieve is a little different. I want to find out, ...
1
vote
0answers
29 views

Collision detection for multiplayer game with MatterJS

We are developing JavaScript multiplayer top down game where characters can move freely and collide with each other. We are rather weak at mathematics and physics, luckily we don't need much, just ...
2
votes
1answer
103 views

Continuous Collision Detection

So I'm playing around with the separating axis theorem and collision. Obviously the problem of what face it collided with arose. I need the unit normal which is tangent to that face it collided with ...
2
votes
1answer
374 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). ...
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3answers
250 views

Collision Detection/Response Issues in Unity

Sprite A: Box Collider 2D and Rigidbody 2D. Sprite B: Box Collider 2D. Both sprites have a Sprites/Default material with Pixel Snap enabled. The textures being used are set to Truecolor Format and ...
3
votes
2answers
1k views

2D Rectangle/Circle Continuous Collision Detection

I'm looking for a fast 2D continuous collision detection algorithm for circles and rotated rects. It needs to determine the time of collision. Both shapes may be moving at high speed, so the ...