A process of adjusting game objects position after collision.

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4answers
137 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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2answers
82 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 ...
-1
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2answers
319 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 ...
-5
votes
2answers
184 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 ...
1
vote
1answer
71 views

How can I determine “exact moment” of collision with ray casting?

I'm currently brainstorming how the physics for my game engine is going to be handled. It's top down and I'm thinking of using ray casting for collision detection. I've reached two potential problems ...
1
vote
1answer
672 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 ...
1
vote
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
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
225 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
68 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: ...
0
votes
1answer
215 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
1answer
318 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) ...
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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 ...
-1
votes
1answer
326 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 ...
-2
votes
1answer
91 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 ...
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 ...
1
vote
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
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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 ...
1
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0answers
133 views

Implementing Separating Axis Theorem to Detect and Handle Sliding Collisions

I am having a bit of difficulty detecting collisions properly with separating axis theorem. My code seems to be giving a lot of false alarms. Also, I've looked into implementing sliding collisions ...
1
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0answers
82 views

2D Polygon Collision push direction with large polygons

I have a collision detection/resolution implementation that uses the Separating Axis Theorem. Detection and such works perfectly fine, as well as resolution for most objects/shapes in my game. ...
1
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0answers
62 views

Manual response when 2 shapes made of rectangular volumes collide

I have 2 compound objects made of rectangular blocks. One of them (the one that is moving) has a script that listens to OnTrigger callbacks. What I need is to position the moving compound object on ...
1
vote
0answers
210 views

2D Distance Field as collision handler method

Pixeljunk Shooter has really cool fluid simulation. I found the dev's video explaining what they did. Here I understand that it is particle based simulation Smoothed Particle Hydrodynamic I can ...
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0answers
147 views

How can I find the collision response between a moving sphere and cube?

I'm implementing my own algorithm for sphere and cube collision response. So far I'm able to only test if both of them overlap. My problem is: A cube is rotating around its axes i.e x and z axes. And ...
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0answers
22 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 ...
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0answers
51 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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votes
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 ...
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0answers
32 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
0answers
30 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 ...
0
votes
0answers
54 views

XNA 2D Tile Baseed Map Collision Messing Up On Inside Corners

I'm creating a 2D Over the head game and the collision system works fine for straight walls and outside corners although not for inside corners. The walls are done by each solid tile having a ...
0
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0answers
46 views

Where to put collision detection and resolution with Verlet Velocity?

I've implemented a 3D Verlet Velocity integrator with variable-velocity forces following this awesome answer: How can I implement gravity? I've used only freely-moving spheres for now, applying ...
0
votes
0answers
119 views

My sprites do not always respect collisions in Pygame

I have a Player sprite (40x40 pixels) and Tiles (20x20 pixels) which build the terrain. At the 4 edges there are 2 rows or columns (depends on vertical or horizontal) of wall tiles. Those are the ...
0
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0answers
27 views

JBullet - Object is colliding at the wrong location!

I'm trying to make archers walk on my ship. I create the ship mesh like this: { Model mesh = null; try { mesh = OBJLoader.loadModel(new File("res/ship.obj")); } ...
0
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0answers
2k views

Alternative to unity's character controller

I wonder what you guy would do for a cheap replacement of character controller in unity. I try a bunch of implementation and they don't work at all, what I'm doing wrong? I'm trying to make a game ...