A tree is a hierarchical data structure that simulates a tree structure with a set of linked nodes.

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25 views

How to ensure a condition in a behaviour tree when processing followin nodes?

Exmaple Tree (Source): As far as I understood, a sequencer iterates over the children until one failed or all are successful. If one children returns "running", the sequencer will start to process ...
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1answer
42 views

Why do KD trees put the median split exactly on a point?

I've understood that KD tree split points using the median while cycling on each axis. I've also understood that at each node traversal, a nearest search must use a sphere to store to nearest neighbor ...
2
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1answer
90 views

How to set indent spacing of a tree in libGDX scene2d?

I've been trying to create a customized UI using scene2d library in libGDX. However I am having troubles as I'm trying to set a custom indent spacing on my Tree object. I have tried to search for the ...
2
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1answer
121 views

How to prune an AI game tree for a game like Magic?

I've got a game tree structure for my AI that I need to trim in order to gain some depth. It is a single-player game of perfect information. A good analogy would be a single-player game of Magic the ...
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1answer
36 views

Texturing in blender

I am texturing a tree in bender using the sappling add-on, when i put the tree bark texture (which is saved as .jpg) the texture looks stretched and wierd, ive used "Use UV for mapping" on the curve ...
4
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1answer
63 views

What is a viable way of finding the minimum swaps to sort numbers in pyramid?

I have made a game that consists of a pyramid of hexagons with numbers from 00 to 99 randomly positioned in groups of 6, 10 or 15 elements. Now, I'm working to create an auto-solver but for the last 2 ...
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1answer
76 views

QuadTree Checking Collision With Different Levels of Nodes

I am making a QuadTree for a 2D Platformer. Researched on it and I managed to make a pretty good one where each node stores its 4 SubNode and there's a MAX_OBJECTS for each Node and MAX_LEVELS which ...
2
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2answers
203 views

AI for Shogi, dealing with high branching factor due to drop rule [closed]

I'm writing a Shogi program with a computer player in Java from scratch as my undergradute dissertation project. Due to the drop rule, when the computer player captures a few pieces, the branching ...
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2answers
316 views

Implementing A* with Heap tree

I'm trying to implement Heap into my A* algorithm, However I'm having trouble with implementing one method. The Contains method. Which checks if the heap array has a specific node in it or not. I don'...
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1answer
216 views

Should I use octree or quadtree for my spacial data structures? [closed]

I would like to know the advantages and disadvantages of using octree or quadtree for spacial data structures? In a 3d gaming setting would you ever need more than 4 children nodes? Does it take ...
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0answers
390 views

Binary Space Partitioning of 3d Triangle Mesh (for finding nearest points)

I'm writing a Binary Space Partitioning (BSP) tree for the purpose of optimizing finding the nearest point on the surface of a 3d triangle mesh with respect to another point. I'm currently following a ...
6
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2answers
2k views

Game AI. Behavior Trees struggles

I'm writing a bot for a MOBA game as final project. Game status is read directly from the screen (that's the requirement). Now I have come to the AI part. On the first steps it started as some ...
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5answers
6k views

Generated 3d tree meshes

I did not find a question on these lines yet, correct me if I'm wrong. Trees (and fauna in general) are common in games. Due to their nature, they are a good candidate for procedural generation. ...
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3answers
398 views

Algorithm for creating tree-like network structures

I'm trying to procedurally model tree-like network structures with the following properties: A root with variable number of nodes A variable depth of nodes When graphically laid out, edges or nodes ...
4
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2answers
711 views

Behavior tree implementation details

I have been looking around for implementation details of behavior trees, the best descriptions I found were by Alex Champarand and some of Damian Isla's talk about AI in Halo 2 (the video of which is ...
5
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2answers
338 views

Handle movement with QuadTree

I currently have a QuadTree that contains all my Entities. It works well and I've optimized it pretty decently, but the one thing that hurts is that I am removing from and inserting to it almost ...
3
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1answer
306 views

Behavior trees - Can sequences and selectors contain conditions?

I can't wrap my head around this. Is it legal for parent nodes to contain additional logic ?
3
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1answer
532 views

Placing nodes in a graph in a random but readable way

I'd like to create a simple map from vertices and lines - you know, like a usual graph. A tree, to be precise. To select the location of the next point that comes from one, I use a simple circle-...
17
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3answers
7k views

How to procedurally (create) grow an artistic (2D) tree in real-time (L-System?)

Recently I programmed an L-system module, It got me interested further. I am a Plants vs Zombies junkie as well, really liked the concept of Tree of Wisdom. Would love to create similar procedural art ...
19
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1answer
13k views

Behaviour tree code example?

http://altdevblogaday.org/2011/02/24/introduction-to-behavior-trees/ Obviously the most interesting article I found on this website. What do you think about it ? It lacks some code example, don't ...
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1answer
214 views

Enumerating full game tree for small board game

I am trying to list all the possible positions in a small board game (nannon) (using C++) So far I have decided to split it into two parts, the pieces that are in home positions and end positions (...
9
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4answers
7k views

2D Spatial partitioning alternatives to spatial hashes and quadtrees

I've been trying to implement a spatial partitioning algorithm in my game, but both spatial hashes and quadtrees aren't what I'm looking for. My level size is not supposed to have a limit (only Int32 ...
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1answer
579 views

Behavior Trees and Animations

I have started working on the AI for a game, but am confused how I should handle animations. I will be using a Behavior Tree for AI behavior and Cocos2D for my game engine. Should my "...
47
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1answer
13k views

Decision Tree vs Behavior Tree

What are some differences between Decision Trees and Behavior Trees for AI Game Development? When would you use one over the other?
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2answers
3k views

Why are trees shining in background?

Currently I am creating a forest scene in the dark, and the trees are shining far away, but when I get close they are fine. I have the shaders set to "Nature/Tree Soft Occlusion [bark/leaves]", but ...
3
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1answer
722 views

Tic-Tac-Toe game AI

I'm looking into creating a simple tic tac toe/noughts and crosses game in Actionscript3 and am trying to understand the ideas behind the AI used in a game like this. I've seen some simplistic ...
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1answer
187 views

Dynamic quadrees

Recently I started writing a Quadtree for creature culling in Opendungeons game. Thing is these are moving points and the bounding hierarchy will quickly get lost if the quadtree is not rebuild very ...
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2answers
6k views

How do I optimize searching for the nearest point?

For a little project of mine I'm trying to implement a space colonization algorithm in order to grow trees. The current implementation of this algorithm works fine. But I have to optimize the whole ...
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2answers
447 views

Balancing a binary tree continuously

In my game I have a tree of objects in 3D space, to which new objects are frequently added. Over time, the binary tree becomes unbalanced which is a big problem for efficiency as the tree can become ...
2
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2answers
1k views

Algorithm to generate small tree-like branches?

I'd like to seed a void map with "branches" of sine waves or any other waveform. Something like: Know of any algorithm? Has to be one to generate trees or something like that.
2
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2answers
208 views

Help computing visibility in old 3d game format

I am trying to compute visibility in an old 3d file format. I am using a BSP tree have finally gotten everything built and traversable. Now I don't have any sort of PVS, potentially visible set to ...
3
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2answers
727 views

Efficiently representing a dynamic transform hierarchy

I'm looking for a way to represent a dynamic transform hierarchy (i.e. one where nodes can be inserted and removed arbitrarily) that's a bit more efficient than using a standard tree of pointers . I ...
9
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2answers
848 views

Efficient structure for representing a transform hierarchy

Can anyone suggest a memory efficient way to represent a tree of matrices, for example in a hierarchy model? I'm particularly keen to preserve data locality, and I suspect a structure-of-arrays (...