The determination of whether or not two or more entities make contact with each other during gameplay.
1
vote
1answer
144 views
Understanding Box2d Restitution & Bouncing
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, ...
-2
votes
1answer
48 views
andengine Tower Defence game - Enemy<-Weapon interaction
What is the most correct from the performance point of view - algorithm of interaction between Enemy and Weapon(bullet maybe more correct here) ?
Should every sprite every single bullet check for ...
2
votes
2answers
322 views
3D Collision Detection with XNA
So I'm trying to implement some collision detection in XNA. I'm aware of the Bounding Spheres, but I worry with the accuracy, most items in my game are cubic in nature, so it seems very square-peg in ...
0
votes
1answer
157 views
Collision with Two Angled Platforms
I've encountered a problem in my attempt to implement Collision Handling for a game I'm creating, involving a collision with two angled platforms.
I'm using GJK-EPA for detecting/handling collisions ...
-1
votes
0answers
19 views
Checking collision between Rectangle and Shape
In my game the player uses a Rectangle for his bounding box, he can do this because I only need to rotate the player image and not the acctual rectangle but for a eletric beam that one of the bosses ...
3
votes
0answers
46 views
Is it possible to get the colliding sides using the separating axis theorem?
The title says it all, is it even possible to get the colliding sides?
I'm checking for collisions between two OABBs, which works fine using SAT. Now I want to set the moving object's velocity to the ...
0
votes
0answers
11 views
Android cocos2d getting collision detection to work only on some frames of animation
I have an animated bomb sprite in my game and use CGRect for collision detection:
for (CCSprite bomb : _bombs) {
CGRect bombRect = CGRect.make(bomb.getPosition().x - (scaleFactor * ...
0
votes
2answers
124 views
XNA 4.0 Plane size
Possibly a dumb question, but do planes stretch on to infinity? I can't define a spanning area for it, and would have to do some sort of check for collisions like if(x intersects BoundingBox and ...
0
votes
0answers
54 views
Collision between the player , stairs, ramps etc
i am making a game 2D in XNA 4.0. I have already made gravity , animations and the jump. Now i need the collision between my character and the objects (obstacles , stairs etc.) How can i do that? ...
0
votes
1answer
118 views
Complex Models using bounding boxes in xna 4
I'm new to XNA, and have just started looking into collision detection.
I've managed to get a bounding sphere around my first person camera object and i want to check the collision between that and ...
0
votes
1answer
119 views
Is there a “box2d without physics” lib (only for collision detection)?
Box2d Collision detection algorithms are probably the best ones out there. Unfortunately, they are bundled together with a realistic physics engine that I don't need.
Is there an open source project ...
1
vote
2answers
166 views
Collision Detection - Slide Around Sprite
I'm creating an RPG using XNA/C# and am trying to add some complicated collision detection code. I have the playable character 'Wizard' and when it collides with something, a method gets called in his ...
1
vote
2answers
67 views
When to detect and respond to collisions?
I've usually implemented collision detection like this in the past:
Move entity
Check if it collides with anything
Resolve the collision by moving it back
That's also the approach employed by most ...
-1
votes
1answer
56 views
Algorithm behind targeting mechanism used by the player characters in Bionic Commando and Just Cause
In Bionic Commando (2009) and in Just Cause 2, the player's character is able to target, using a "hook based one arm mechanism" almost anything and is able to propel itself to it and perform several ...
7
votes
3answers
194 views
Collision detection problems using AABB's
I implemented a simple collision detection routine using AABB's between my main game sprite and various platforms (Please see code below). It works great, but I'm now introducing gravity to make my ...
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 ...
1
vote
1answer
269 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
vote
1answer
65 views
How to predict future location of a Car in a Navigation Mesh based pathfinding system?
I am developing a car based shooting game in which the Cars have to shoot each other 3/4 times and eliminate it from the game.
I am trying to develop the AI for my cars now. The problem is how can I ...
1
vote
1answer
545 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 ...
1
vote
2answers
508 views
Efficient collision detection - tile based HTML5/Javascript game
I'm building a basic RPG game and I'm looking at collisions/pickups etc now.
It's tile based and I'm using HTML5 and Javascript.
I use a 2D array to create my tilemap.
I'm currently using a switch ...
2
votes
2answers
265 views
Detecting collision between ball (circle) and brick(rectangle)?
Ok so this is for a small uni project. My lecturer provided me with a framework for a simple brickbreaker game. I am currently trying to overcome to problem of detecting a collision between the two ...
2
votes
0answers
55 views
Detect collision in Blender
I am trying to write a Python function for Blender(2.66) game engine, that permits me to detect collision between two objects.
I tried to read the documentation, but it's very confusing, and I don't ...
0
votes
1answer
104 views
How do real-time games like starcraft 2 and league of legends transmit and broadcast data during play? [closed]
How do real-time games like starcraft 2 and league of legends transmit and broadcast data during play?
Is all real-time data transmitted to and from the server in udp packets?
Do users directly ...
0
votes
2answers
99 views
C# XNA AABB vs AABB collision resolution, AABBs ghost through each other
I've been learning a bit of collision resolution through a tutorial here and I can't seem to get the AABBvsAABB resolution working, I have CirclevsCircle and AABBvsCircle resolution working with the ...
5
votes
1answer
1k views
Fast, accurate 2d collision
I'm working on a 2d topdown shooter, and now need to go beyond my basic rectangle bounding box collision system.
I have large levels with many different sprites, all of which are different shapes and ...
0
votes
5answers
409 views
Collision detection logic
Edit 2
In the following picture sprite1 (the red square) is hitting the platform from the left, so:
sprite1_rightEdge>platformSprite leftEdge
would be true, so I can simply reposition ...
0
votes
1answer
74 views
My logic in collision detection in diagonal code correct? [closed]
I made this code to detect collision from the diagonal(top left). I'm trying to find the problem on what I'm doing wrong. Is it necessary to have a diagonal collision for the wall?
Player class:
...
3
votes
3answers
120 views
XNA Collision is quircky/wobbly, how to improve?
I am sorry if this was already answered but I couldn't find the answer.
So I am doing a tile based platformer and when I was making collision I had quiet a struggle I looked here and googled for ...
-1
votes
1answer
180 views
How was traditional 2D collision detection/resolution being done? [closed]
Just out of pure curiosity, I'm wondering how classic 2D games of the 80s/90s (The Legend of Zelda, Super Mario, Warcraft, ...) approached collision detection/resolution.
For some reason I can't ...
0
votes
2answers
118 views
sprite animation system height recalculating has some issues
Basically, the way it works is that it update the frame to show every let's say 24 ticks and every time the frame update, it recalculates the height and width of the new sprite to render so that my ...
1
vote
1answer
69 views
Detecting collision with a 3D array of boxes
I am at the stage of my development process where I want to implement collision. Now I can think of a simple way of doing it, if the camera's x, y or z are inside the position of a certain cube then ...
0
votes
1answer
162 views
Normalizing the direction to check if able to move
i have a a room with 4 walls along the x and z axis respectively. My player who is in first person (therefore the camera) should have collision detection with these walls. I'm relatively new to this ...
1
vote
1answer
89 views
Rectangle collision is not working correctly [closed]
I have difficulties with the rectangle collision. My character can go through the right side and through the bottom of each platform rectangle. I guess their is a mathematical problem with the ...
0
votes
0answers
30 views
Need help with collision with player and tiles XNA [closed]
I have a player collision with the rectangle size 16x32
and the tiles are in 16x16 sizes. I have a problem checking collision with player touching 2(or more) tiles ontop of each other.
My code works ...
0
votes
0answers
50 views
Collision detection issue on 2D game engine with isometric game graphics [duplicate]
Let me first show you an example of issue so you'll see the problem.
http://i.imgur.com/dTxJIN7.jpg
The player object has red colored collision borders. Since I'm using an 2D engine, his head ...
-1
votes
0answers
36 views
Logic flow of rectangle to N-rectangles collision [closed]
I have a really hard time here figuring out the error in my program.
My code only works in 2 rectangles but if I increment number of rectangle, stricken of movement, don't work at all, such as, when ...
3
votes
2answers
477 views
What has the most efficient intersection test against an AABB tree - OBB, Cylinder or Capsule?
I'm currently trying to find collisions in 3D between a tighter volume than an AABB and a tree of AABB volumes. I just need to know whether they are intersecting, no closest distance or collision ...
1
vote
1answer
58 views
how to detect when a character is walking on an item in java
I just want to know if there is a way in java to detect when the character is on an item on the floor without without verifying if every items on the map contains the character or vice versa in every ...
0
votes
1answer
56 views
Differences between Overlap and Intersection testing?
I have heard of techniques such as overlap testing and intersection testing for collision detection and collision resolution.
I looked up on the two techniques, but I don't see what differences they ...
-1
votes
1answer
62 views
Breakout style ball-paddle bounce, error at corner
I am trying to make a breakout game where you have a paddle and a ball bounces around breaking bricks. The problem is that if the ball touches the corner of player it goes inside of player. I change ...
1
vote
0answers
155 views
Love2D : How can I keep up with lots of small sprites' collision data?
So I'm using a SpriteBatch to keep up with lots of small pieces for a falling-piece puzzle game. I have an array of Quads (for different color blocks), and they are randomly added to the ...
1
vote
2answers
67 views
Mapping of positions on images in different frames
I am looking for a possibility to map different positions on a 2D Image which has different frames.
Let's say I have an image, consisting of three frames, which shows a spaceship.
The first frame ...
-3
votes
0answers
48 views
Bullet not return when player shoot to any object [closed]
package com.example.game4;
import java.io.IOException;
import java.util.Iterator;
import java.util.LinkedList;
import javax.microedition.khronos.opengles.GL10;
import ...
0
votes
1answer
78 views
Bounding Boxes and XNA
So heres some straight up code for you:
BoundingBox b = new BoundingBox(
Vector3.Up + Vector3.Right + Vector3.Forward,
Vector3.Down + Vector3.Backward + Vector3.Left);
BoundingBox bb = new ...
1
vote
0answers
111 views
How can I implement collision for a “pseudo-3D” game?
I'm looking for high level implementation details, not specifics.
I've worked with bounding boxes before in some 2D games, but I'm currently tackling a "2D + depth" (2.5D?) style game along the lines ...
2
votes
2answers
93 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
votes
0answers
52 views
AS3: Handle collision with ground. Velocity's and hitTestObject() [closed]
I'm working on a sidescroller game but i'm having issues with my screen region and collisions.
I will just stick to 1 problem because once this is fixed i can probably also fix my screen so it scrolls ...
9
votes
4answers
738 views
Circle inside circle collision
In one of my projects I have a game area in the shape of a circle. Inside this circle another small circle is moving around. What I want to do is keep the small circle from moving outside the bigger ...
4
votes
1answer
321 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 ...
0
votes
0answers
73 views
Irrlicht collision with a invisible mesh [closed]
I'm writing a Final Fantasy-like game engine, with 2D backgrounds and 3D models with Irrlicht.
To calculate collisions with the objects in the background I use a invisible mesh like this:
I have ...
