Methods used to map out a path of travel from one point to another, typically avoiding obstacles in the way.

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344 views

What's the best way to move cars along roads

I am implementing car movement game (sort-of like Locomotion). So 60 times a second I have to advance the movement of each car. The problem is I have to look ahead to see if there is a slower car, ...
2
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2answers
299 views

Prevent collisions between mobs/npcs/units piloted by computer AI : How to avoid mobile obstacles?

Lets says we have character a starting at point A and character b starting at point B. character a is headed to point B and character b is headed to point A. There are several simple ways to find the ...
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2answers
297 views

Pathfollowing with acceleration - centripetal force

I'm implementing A* waypoint pathfinding with some twists. One of the problems I'm encountering is because I do not change velocities of the agents directly but rather I do so through forces. Which ...
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2answers
183 views

Grouping units in world space

I figure that I intend to generate, for group orders, one optimal path, and then use a flocking algorithm to "glue" the units together as they all follow this one optimal path. However, a naive ...
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1answer
545 views

3D RTS pathfinding

I understand the A* algorithm, but I have some trouble doing it in 3D to suit the needs of my RTS Basically, in the game I'm making, there will be agents with different sizes of OBB collision boxes. ...
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2answers
994 views

Are there any usable performant path-finding libraries for python?

This is cross-posted from StackOverflow, please feel free to answer there too: I'm working on a real-time isometric RPG in python, and wish to target mobile devices as a platform. The main area where ...
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2answers
101 views

How can I keep AI from getting stuck on each other?

I'm currently working on AI and, as stated above, I'm having trouble figuring out how to keep the AI from getting stuck on each other. More specifically, I'm working on two different behaviors for ...
2
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1answer
152 views

Pathfinding with car steering

Is there pathfinding algorithm which takes car steering into account? I have large space where user can place cars (trucks actually) and other blocker objects. Objects can be placed vertically or ...
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2answers
619 views

Using A*Pathfinding on terrain created by scripts?

I'm looking to use A* Path-finding as a method of navigating my game terrain. Trouble is, my terrain is built upon play using a script and A* grid does not detect this, therefore marking all nodes as ...
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1answer
44 views

Moving unit along a computed path

I am generating a path using pathfinding.js. This returns a path of node coordinates from a matrix. Example: var matrix = [[0,0,0,0], //0 are passable, 1 are obstacles [0,1,1,0], ...
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2answers
106 views

How can I test if a point is behind a polygon in 2D?

In order to improve the performance of my visibility graph generator I am trying to figure out the following. Given the image below; is there a way to find out if a point is 'behind' the polygon? For ...
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1answer
565 views

Seek Steering Behavior with Target Direction for Group of Fighters

I am implementing steering algorithms with group management for spaceships (fighters). I select a leader and assign the target positions for the other spaceships based on the target position of the ...
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2answers
2k views

pathFinding performance in Unity3d

I am making Sniper game in unity 3d. In this game zombies will come randomly towards the sniper and sniper have to kill them. I am using RAIN(indie) for path finding. It works best when zombies are ...
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1answer
499 views

Dynamic obstacles avoidance in navigation mesh system

I've built my path finding system with unreal engine, somehow the path finding part works just fine while i can't find a proper way to solve dynamic obstacles avoidance problem. My characters are ...
2
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1answer
209 views

Is finding graph minors without single node pinch points possible?

Is it possible to robustly find all the graph minors within an arbitrary node graph where the pinch points are generally not single nodes? I have read some other posts on here about how to break up ...
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2answers
352 views

jQuery game - collisions

Please take a look at the picture below: It is and attempt in creating a "game" only with the DOM and jQuery. The blue boxes are "obstacles" and the user can move his pointer (not drawn in screen ...
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1answer
313 views

Dynamically creating astar node map by triangular polygonal map

My game's map format uses a bunch of triangles to make up the platforms and terrain in 2d. Right now I can set up a 2d array of nodes for the astar algorithm that basically is a bunch of rectangles ...
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1answer
145 views

Basic Node Based Pathfinding

I am new to pathfinding but i have read and watched through some articles, blogs and videos about Pathfinding. Since those that i have read and watched from are mainly for RTS Games, Grid Based ...
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2answers
249 views

How to use an A* Pathfinding System across uneven environments?

I am developing a game in Unity3D. I want an enemy character to follow the player around. The problem is, my surface is uneven and full of mountains. I am using aarongranberg's pathfinding project. ...
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1answer
179 views

Detect obstacles in path on a tile-based map

I'm creating a 2d game with a tile-based map, but smooth movement. I currently use A* in combination with some other tricks for pathfinding, and one issue what I've been dealing with is getting the ...
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0answers
146 views

Simulating crowds of enemies [closed]

I am wondering what would be a good way to handle enemy crowds generation and simulation. For example in a hack'n'slash game, how would one go about placing enemies and managing their movement in the ...
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0answers
124 views

Astar optimalization (A*) [closed]

So I have written own implementation of AStar (A*) algorithm to find paths around my 2d tile based map. My problem is that if I call it each frame (I need to do it) and I'm searching path from corner ...
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0answers
130 views

Design Question, Thoughts on Path Finding for a Galaxy Map [closed]

I am thinking through solutions for a galaxy map. We have different solar systems that need to be connected. I do think a-star (A*) is possibly a good solution but was curious if it was really the ...
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3answers
394 views

Why can't my A* implementation find a path out of an open room?

I tried to follow this article with the following example, but in my attempts it always ends up with a dead end. If we take G being 10 in a straight line or 14 in a diagonal, and H the distance in ...
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3answers
867 views

Would A* or Dijkstra be more proper for a grid-based tactics game?

In a grid-based tactical game (think Fire Emblem), would A* or Dijkstra be more proper for finding a path to use for enemy AI to determine the best place to move? A* has a better performance that ...
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2answers
242 views

What are some techniques used for mouse tracking, with a bit of “emulated lag”?

I am trying to implement a system, where the cursor (in my case the player's avatar) is always about 1.5 seconds (a configurable interval) behind where the mouse actually is. If I change the cursor's ...
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2answers
777 views

A* only for horizontal / vertical movement

anyone can share a link for a tutorial or article about optimizing A* for horizontal / vertical movement (no diagonal). Is not as easy as change the G values to 10 everytime. Thanks
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2answers
726 views

A* path finding for road network - data structure to represent directivity

I have been reading A* path finding to apply on a road like network structure. Most of the code I saw is about A* on tile based maps. There is a short description at Amit's page here about what I am ...
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2answers
542 views

Influence Maps for Pathfinding?

I'm taking the plunge and am getting into game dev, it's been going well but I've got stuck on a problem. I have a maze that is 100x100 with 0,1 to indicate if its a path or a wall. Within the maze ...
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2answers
1k views

How to make a gui button follow a path after a touch?

I would like a button in my gui menu to follow a specific path if we selected it, I am wondering how I could do it: if we touch the button, then it can only move on the specific path, it is an arc ...
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2answers
528 views

Moving an object around the the circle to the specific location in circumference

Well I have run out of ideas how to approach this particular problem.See the picture below: So the idea is that the object (dot in black) has to get to a point mark X (red X mark).However the ...
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1answer
290 views

How can I change the path a sprite is following in real time?

Is there a common way to implement a character following path that is issued and replaced in real time? For example: the character follows a path issued, and while it's on that path, if a new path is ...
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2answers
115 views

Algorithm for waypoint path following?

I have a worldmap, with different cities on it. The player can choose a city from a menu, or click on an available cities on the world map, and the toon should walk over there. I want him to follow ...
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2answers
792 views

Displaying possible movement tiles

What's the fastest way to highlight all possible movement tiles for a player on a square grid? Players can only move up, down, left, right. Tiles can cost more than one movement, multiple levels are ...
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1answer
170 views

Path-finding with obstacles that can be destroyed

There are several buildings on the map with size n * n, and a lot of tiles of obstacles that can be destroyed. Suppose I put one soldier on (x,y) of the map, the soldier can reach a building by ...
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1answer
119 views

How do I avoid obstacles on a predefined path?

I want is a character to walk along a path defined as a waypoint sequence. For example, a soldier patrolling around a castle. However, I want the soldier to avoid (dynamic) obstacles, without ...
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1answer
1k views

A star algorithm implementation problems

I’m having some trouble implementing the A* algorithm in a 2D tile based game. The problem is basically that the algorithm gets stuck when something gets in its direct way (e.g. walls) Note that it ...
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2answers
1k views

Javascript A* path finding

I am trying to learn A* path finding. I am using this library - https://github.com/qiao/PathFinding.js But there is one thing I don't understand how to do. To find a path from player.x/player.y ...
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1answer
69 views

Pathfinding across mutliple levels

For a final school project, I have implemented an A* algorithm for pathfinding across a tile graph. So far, it has worked far surpassing my expectations. However now I'm in the process of adding a bit ...
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2answers
604 views

How should I store edge weights for my A* graph?

I am working on A* pathfinding in Unity, using C#. I am implementing Dijkstra's shortest path algorithm. I have a Dictionary with nodes as keys and corresponding lists of adjacent neighbors as values, ...
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1answer
239 views

Quick 3D sight calculation algorithm

I have a tile based board game where units move in 3D space on a 2D isometric view. When calculating attack tiles for a unit, how do I verify that they aren't shooting through a wall or a level too ...
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2answers
114 views

Best way to constrain character to a path?

I'm in the process of developing a level-based runner for mobile phones, and I've hit a wall when deciding which method to use to get the character to move through the level. Basically - I need my ...
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1answer
114 views

Electronic circuit simulator four-way flood-filling issues

I've made an electronic circuit board simulator which has simply 3 types of tiles: wires, power sources, and inverters. Wires connect to anything they touch, other than the sides of inverters; ...
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2answers
326 views

How can I implement platformer pathfinding?

I've gone through A* pathfinding but could find anything on this. What I'm looking for is pathfinding for something kind of like a super smash bros level with different platforms. Can anyone point me ...
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2answers
955 views

Pathfinding in non tile-based 2d map (maybe potential field)

I am developing a top-down 2d zombie shooter in AS3. I have implemented collisions against segments (line from point a to point b), polygons (array of points, convex) and round obstacles (center and ...
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3answers
4k views

Is there a way to display navmesh agent path in Unity?

I'm currently making a prototype for a game I plan to develop. As far as I did, I managed to set up the navigation mesh and my navmeshagents. I would like to display the path they are following when ...
1
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1answer
367 views

Tiled based pathfinding in a 1- or 2-dimensional array

As far as I know all tile based map editors export a JSON object containing one dimensional arrays. While most pathfinding libraries/tutorials are only provided for two dimensional arrays. Also if ...
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1answer
148 views

Travelling in a 2D grid

I have a 2D grid (x,y coordinates) where each cell corresponds to each pixel of the interface that I am working with and I have a point A(x1,y1). Now I need to travel around in the grid, and I wont ...
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2answers
1k views

Grid pathfinding with a lot of entities

I'd like to explain this problem with a screenshot from a released game, DROD: Gunthro's Epic Blunder, by Caravel Games. The game is turn-based and tile-based. I'm trying to create something very ...
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1answer
950 views

Pathfinding using nodes/waypoints without connecting them?

I've been doing some research on pathfinding lately because I want to code a game modification for a game (won't say which exactly) and what I've done is defined a huge list of 3D vectors where a ...