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

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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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1answer
220 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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24 views

OBB/OBB Test in OZCollide

I want to know if anybody, who tried OZCollide (http://www.tsarevitch.org/ozcollide/), knows whether OBB vs. OBB Tests are possible or not. I know there is a AABB vs. OBB function but I can't find one ...
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1answer
35 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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49 views

Side-Collision for Breakout game where ball moves fast

So I've been trying to make a breakout clone, which is my first attempt at a graphical game, I ran into some problems, and was hoping that this community could help me. I've got most of the mechanics ...
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1answer
66 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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1answer
57 views

How do I create a custom collision map for clickable areas on a map?

Say I had a map like the one displayed above. What would be the best method of creating a collision map for each individual state where I can click individually?
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23 views

OBB Collision Intersection Problem

I'm trying to create OBB's around objects and then collide them using DirectX 11 and C++. It all works fine until I rotate one (or more) of the boxes and then the collision detection returns true too ...
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39 views

Collision Detection Unresponsiveness

I'm creating a simple jumper game in Libgdx that makes the player jump over obstacles in order to stay alive. The only problem is that the collision detection for when the player just touches the ...
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2answers
45 views

How to pass the snake to pass through one side of the screen and come out the opposite side in c# game?? Help me :(

How do I code the left and right collision, and also tell me how I can set the collision of snake according to the form size. If i want to change or maximize the form, snake should collide with the ...
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1answer
22 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 ...
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3answers
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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22 views

libgdx - Math reflection to the correct direction

I'm using a simple reflection system, but the game doesn't work how I want. How should this game work? The game has two boxes. A red side and a black side. The player should only sort the bombs to ...
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3answers
1k 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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1answer
565 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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38 views

Collision detection with Physics P2 in Phaser.io

had written this thread that relates to a project I'm developing while trying to learn phaser. I could really use some advise/ feedback on making the user experience a bit more easier as I seem to be ...
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1answer
110 views

How to determine contact bodies when multiple bodies overlap and a third makes contact with both at the same time

I understand how the below DidBeginConact function works, but how do you detect which categories make contact when you have multiple colored bars (in the example code) or a friend category and enemy ...
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8 views

Clicking an entity with transformation

I am trying to understand how best to implement a click detection function in a 2d JavaScript game. I can demonstrate using a simple example of two square 'entities' which can be selected when ...
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1answer
97 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
478 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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2answers
566 views

Libgdx using Box2d with TiledMap to create collision detection

I'm fairly new to Libgdx and have some good basic knowledge on Java. Right now I am stuck on how to add collision to my TiledMap, I am using the Mapeditor to create the tilemap. I read so many ...
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3answers
102 views

C++ Platformer Collision

This is very simple, but I have spent nearly 6 months messing with this and it is always messed up. This is a tile platformer, everything is "normal", x and y correspond to tile. Tiles are 32 x 32 ...
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154 views

Detecting collision with walls (is this a good solution?)

I'm trying to make the collision smooth (it must open the animation, but not move the character). I've implemented 'fake positions': int step = 20; fake_left_x = x-step; fake_right_x = x+step; ...
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1answer
136 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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18 views

Make Kinematic P2 Body collide with world bounds

I have a P2 object( A) with a custom bound that detects collision with another P2 object(B ). However, object A is set to be kinematic rather than dynamic as I do not want object A to react to ...
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1answer
679 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
56 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
99 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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2answers
407 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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2answers
122 views

Inconsistent AABB collision detection

I'm making an endless jumper as my first game and I'm running into some problems with the one-way collision detection. Collisions are detected correctly most of the time but occasionally the player ...
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0answers
27 views

Phaser - Add collision to a specific tilemap layer?

In Tiled I made two layers, "Background" and "Walls" and I have positioned them accordingly, both as a background and walls, or if you prefer "Not being able to collide" and "Being able to collide". ...
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2answers
129 views

XNA 4.0 - Bounding Boxes

So i'm kind of new to programming and im trying to check collision using bounding boxes. i'm currently stuck as to how to call my bounding box within my bounding box function as shown below public ...
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2answers
289 views

How to impale and stack targets correctly according to the collider and its coordinate?

I'm making another simple game, a catch game, where a spawning target game object must be captured using a skewer to impale it. Here how: At the start, the falling object (in red) will fall in a ...
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1answer
114 views

Collision with player following mouse

I'm making a RPG with libGDX. I've loaded a TiledMap and now I'm implementing the player movement. The view is top-down. In my game I want two ways of input: one is using the ARROW keys to move the ...
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1answer
65 views

libgdx - Math for wall collision when adding velocity

I've created a game which spawns a random colored ball in the top or bottom of the screen and moves to random direction with this method. private Vector2 position; private Vector2 velocity; private ...
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1answer
135 views

Is the standard collision detection in Slick2D too heavy for broadphase?

I was wondering two things about the built in shape detection of Slick2D. When executed on a lot of shapes, how performant are the intersects and containsmethods, and what kind of algorithm is behind ...
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2answers
17 views

Tiled height level collision

I have created the below tilemap in tiled and I am wondering about a good approach to "separate" these two different heights in the map. I would like to keep it tile based, so adding a object layer ...
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0answers
31 views

c# adding object collision to multiple objects

I'm trying to make a mario, platformer type game, and from following a tutorial, they've done the collision like this, but im wondering if there is a simpler way to it since I want to have collision ...
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1answer
111 views

Two dimensional elastic collision of balls

I am trying to create a simple elastic collision simulation in java. (I am using some helper libs like StdRandom) Here is my Ball class : class Ball { double cx, cy; Vector velocity; ...
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1answer
132 views

How to retrieve vertex information from ID3DXMesh

I need to know the position of each vertex (and triangles) from a mesh (a pointer to ID3DXMesh, created by calling functions like D3DXCreateBox, D3DXCreateTeapot and D3DXCreateSphere) to perform some ...
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1answer
50 views

Collision between UI element and GameObject

When I first started to develop in Unity I followed the Unity Tutorial for the Space Shooter 2D game and used the knowledge from that to create something myself. Looking at it now it may not have been ...
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2answers
459 views

Collision detection between draggable object and world objects?

I have a game I'm making in Javascript that will involve combining items by dragging and dropping them onto each other. Think Alchemy or similar. So far, so good, but I hit a snag while trying to ...
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1answer
148 views

Ray & Segment Intersection

I'm writing some code to check intersection between all of a rectangles segments and a ray. It will sometimes use the Left and Right side of the rectangle as the closest face hit (face DA & BC) ...
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votes
2answers
164 views

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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1answer
122 views

Collision isn't working in pong

I've posted about another pong problem a while ago, but now I'm having another problem with the ball collision with the paddle , when the ball collides, it doesn't bounce back, why is that? Here is a ...
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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 ...
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2answers
49 views

need to make a ball travel in the angle it was hit from

self.hitBall = function (ball, x, y){ var angle = Math.atan2((x - ball.centerX), (y - ball.centerY)); ball.velocityY = (Math.sin(angle) * 10); ball.velocityX = ...
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2answers
919 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 ...
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3answers
526 views

How to flick gameObject using Touch?

I've been searching for a solution for my problem for a while on the web, but i didn't find anything that work properly What i want to do I have a bouncing ball and I want to let the user flick it ...
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2answers
592 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 ...