Questions tagged [lua]

Lua is a powerful, fast, lightweight, embeddable scripting language. Lua is widely used as a scripting language by game programmers, perhaps owing to how easy it is to embed, its fast execution, and its short learning curve.

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1answer
955 views

Lua script for World of Warcraft: Get Quest Info

I'm looking to make a very simple addon or even a macro where I can enter a quest ID and get the quest completion status. As it is, I know I can use ...
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1answer
150 views

How can I generate my puzzle game's result tables?

I have a pattern game and it is almost done however I am stuck on the last part. I have a screen with 25 blocks (in a table format 5x5) and the user clicks on it to turn over the blocks, I need to ...
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1answer
252 views

Love2D how to zoom out map?

I've set up a basic map with Tiled, imported it with STI library (https://github.com/karai17/Simple-Tiled-Implementation) and everything looks in place. How can i get a zoom-out feature now? I can ...
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1answer
130 views

how to control units in a game using scripts

I'm looking to create a game like screeps, in which the user controls their units using javascript. I am planning on using lua as the scripting language that controls the units in my game, as it is ...
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1answer
103 views

Is it possible to have a fixed camera without a CameraSubject?

I have created a very simple script to set up a fixed camera with no subject. In other words, I want a camera in a static position looking down at the world (a top-down style camera that doesn't ...
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1answer
1k views

C++ formatted serialization [closed]

I've decided it's time to implement serialization in my simple engine but this has caused me many headaches for the past couple of days/weeks. My engine uses an entity/component based approach similar ...
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4answers
3k views

Procedurally generating a building of specific area

Myself and a team are working on a factory builder game that gives the player a random factory at the start of the game. To try to make sure there is a sense of "fairness," ideally the randomly ...
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1answer
473 views

Change transparency of image at runtime, LOVE2D

I would like to know how to take a defined image (e.g. a tile) in the LOVE game engine and draw it with a transparency that may vary per-frame. Stencils seem to only work for completely hiding parts ...
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0answers
250 views

Sprite batching and dealing with isometric depth sorting

So I'm using Love2D which uses SDL2* as far as I'm aware and I have a question about texture atlases & spritebatching. I have an isometric chunk, with 2 layers, terrain and objects (trees, ...
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0answers
152 views

interace between C and Lua function with 3D vector arguments [closed]

I have C++ function (which runs some physical simulation inside my game engine) which looks like this: ...
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3answers
1k views

Component based entity system API naming problems

My engine uses a component-based entity system internally, and I want to bind it to Lua for scripting. Now, I want to save people who write scripts for it typing work. In C++, to set the position of ...
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2answers
740 views

Roblox script: Can't get “IntValue”?

I am new to Roblox scripting (Lua apparently) and was fiddling with a function that is called when one Part (dubbed the "Sender") is touched by another Part, which is actually a tool with a Part ...
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1answer
145 views

Const returning C++ method can't be bound with LuaBridge

I have a method with this signature: const std::string GameObject::GetName() And then I try to bind it with this line: ...
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2answers
250 views

Is my Lua form/scene loading setup efficient?

At the moment, I'm working on a small game project using LUA and the love2d framework. Using this framework, I've made my own assets (i.e. button images, form images, etc), and using these assets I've ...
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1answer
529 views

What functions should be called in C++ gameloop from Lua Script

I am using sol2 lua wrapper for my 2D game-engine to implement some lua scripting,but I have some questions about what should functions should i call from Lua scripts in c++, and i cannot find any ...
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4answers
3k views

Is it efficient to use Lua to store game data?

I'm new to Lua and I'm wondering, is it efficient to use Lua to store game data (such as monster's description, spells). My problem is this: when I try to create a monster object every second, I have ...
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1answer
85 views

Nested ipairs for basic hit detection

I'm developing my first game using Löve, the game is a basic Asteroids clone. Everything is going well so far, until I decided to actually add asteroids. I'm trying to make a basic hit-detection that ...
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0answers
487 views

How to store Lua script's inner state?

Situation: I am working on an Entity-Component system, and I am using LuaBridge as a Lua binder. There is only one Lua State. Currently when I update the game objects, I just check whether it has a ...
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1answer
96 views

Is allowing the server to remotely execute code on a client a security risk?

My game uses scripts that can be edited by the player and I'm trying to figure out how to handle multi-player, while still allowing custom scripts. What I am thinking about doing is having the server ...
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1answer
453 views

Should I create a Lua wrapper classes for my C++ classes, or should I bind them directly?

I have a fairly standard architecture like this: GameObjects have Transform, and can have ...
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2answers
63 views

Pressed key doesn't run out of special powerups

So I'm making a game in Lua/Love2D and have a problem with my game logic. Mainly I have a spaceship that can use boost and stuff. That part is fine, I click space and it boosts up to speed quickly. ...
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1answer
518 views

Love2D and 'Tiled' - Detect if player is over certain tile/Collision

I created a 50x50 tile map with 32x32 tiles in Tiled and exported it as a Lua file so I can use it in Love2D. I have a player you can move around the world but I'm attempting to convert the player's x ...
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1answer
651 views

Garry's Mod gamemode scripting (lua) - How do I tell if an object is inside a hollow cylinder?

I'm fiddling about with gMod trying to make a gamemode where you have to throw a piece of cake into a cylinder that spawns on the map. This is the code I'm using to spawn the cylinder: ...
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2answers
11k views

2D and 3D Perlin Noise Terrain Generation

I'm using 2d perlin noise to generate a heightmap and then adding 3d perlin noise to the heightmap to create overhangs and ridges. But it's not turning out like I would like it to. There are too many ...
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0answers
280 views

Reimplemented steering seek behavior from PyGame to LÖVE is much slower than original

I'm learning about steering behaviors and watched this nice explanation tutorial - https://www.youtube.com/watch?v=g1jo_qsO5c4&feature=youtu.be with the source code available at https://github.com/...
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1answer
490 views

Difficulty understanding integration of Lua with C++ Game Engine

I'm starting work with the Allegro C++ library to get some lower level game development experience after working mostly with Unity. I've read about how Lua is a popular scripting language choice for ...
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2answers
797 views

My perlin noise height map doesn't have smooth transitions and goes directly from black to white

I am using lua with the love2d engine to make infinite 2d tiled terrain with perlin noise. This is just the first step and I want to fix the bugs early. The problem is that there is no gradient ...
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1answer
762 views

Can MoonSharp call functions from static classes?

My question is very simple. I'm using MoonSharp to add Lua scripting to my game. One use case involves calling a static artificial intelligence function from a static class I've implemented in C#. I ...
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2answers
279 views

Passing an SDL KeyboardState(Uint8*) to Lua

I'm working on my first big project and I've decided to integrate Lua with my C++ framework. Everything's worked out so far, but the only way I've managed to pass the ...
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1answer
56 views

How to automate baking pizza in Corona SDK?

I'm writing a game about making pizza in Corona SDK. When you buy chefs, the new chef is supposed to make some pizzas on its own like automation. I tried everything I knew about, I couldn't think of ...
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1answer
250 views

C++ - Lua Preventing malicious lua code

Im working on a "game" that uses lua for scripting and i plan on making it very mod-able. However, malicious code can be written without much difficulty in lua... So how can i go about stopping that? ...
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1answer
157 views

Unwanted line between chunks in heightmap infinite terrain

I can't figure out what is causing the line between my two chunks. They are completely aligned. It must be something to do with the algorithm. I am using lua with the love2d game engine. Here is a ...
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1answer
142 views

Got unexpected results from perlin noise. Wondering what it is doing?

I was just messing around with perlin noise and got this. Wondering if anyone knows what it is or has seen it before. Here is the code(LUA with love2d engine): ...
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2answers
376 views

How do I handle objects with a width and height in grid-based pathfinding?

I'm using the Jumper library for Love2D to do grid-based pathfinding, which worked fine until I wanted to make larger enemies (with larger collision boxes). How do i do that? My initial idea was to ...
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2answers
2k views

Performance Issues Using Lua in C++

I'm making an engine in C++ with Lua for its scripting language (using LuaBridge as the binding). I have a lot of entities and those entities have components. One of the components on those entities ...
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1answer
177 views

Can i put the main Love2D functions inside a table?

Instead of having a file with load, update,and draw can i say have a table called player, then put love.update and love.draw in that table to handle the drawing and updating of that particular player?
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1answer
177 views

Z buffer for large vs small objects

Are there common, tried and tested techniques for making sure that when displaying very large and very small objects, in a 3D environment, those objects don't display in front or behind each other? ...
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3answers
216 views

Scripting: to block or not to block [closed]

Context: I'm making a little "program your robot army" sort of game in Java in which the player writes Lua scripts (which are then run by LuaJ) to program their robots to do stuff. So far there are ...
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1answer
252 views

Open CryEngine console from lua script

Is there a function in the CryEngine Lua API to open the ~ Console? I cannot find it in the Lua (ScriptBind) API reference.
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1answer
37 views

How to calculate the magnitude of the drag in Corona-sdk?

I'm making a game on Corona that launches a ball. The force is based on the magnitude of the drag: the larger is the drag -> the higher is the force. I'm having some trouble to do this, because I ...
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5answers
4k views

How can i run my .LÖVE game directly from the lua interpreter?

I've just started with LOVE and LUA , i'm interested in LOVE because i want to play around with something different from my dayjob(i'm a webdeveloper) and since it uses LUA and is interpreted , i ...
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0answers
40 views

How to include moai in lua code for running it using luajit?

I'm running moai from ubuntu for some simulation purposes. I have a lua script that is executed using luaJIT. Now I want to run a simulation written based on moai from within this script. As of now,...
69
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6answers
49k views

How does Lua work as a scripting language in games?

I'm a little hazy on what exactly Lua is and how a game that is programmed in C++ would use it. I'm asking primarily about how it is compiled and run. For instance when you use a program written in C+...
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0answers
992 views

How to fix my camera angle in ROBLOX?

I am trying to make my own camera in ROBLOX. Here's my problem, I am using an inverse function to make the camera look nice and smooth but it only works on the x axis in the positive side. Here's an ...
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2answers
78 views

What does this shader error in Löve2D mean?

What could I've done wrong to get the following error message when trying to create a GLSL shader in Löve2D? I'm sincerely clueless of what the mistake could be, though I suspect the error being a ...
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1answer
173 views

How can I fix this code to spawn multiple types of enemies on the same point with the Corona SdDK?

I have this code to spawn a simple enemy outside the window: ...
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1answer
124 views

How do I select a portion of the window using Love2d

I want to be able to divide the window of the game in, lets say, 3 places, and when the mouse (or touch) click one of those places, execute some code. Do I have to make each portion a button-like ...
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2answers
3k views

How do I change a LÖVE2D game executable's icon?

I merged my game.love file and the love.exe with the command ...
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0answers
207 views

What's the best way to store tiles' infos in a 2D table?

I need to know what's the less time / memory consuming way to store the infos about each tile in a 2D table. The first thing that came to my mind was creating a table holding the infos, and then ...
2
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1answer
69 views

Dynamic force behind logical jumping on 3 axis'

I've been working on physical jumping in a 3D environment, I've got it working with a static force. The problem with this is that the force on each axis should be different due to the rotation from ...