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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113 views

Logical math behind jumping in a 3D world

I'm unsure if I should ask the mathematic part of StackOverflow or the gamedev part. I'm trying to figure out how the gravity changes the position of an element in a 3D world. I've been trying to ...
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86 views

Why does my world generation code perform poorly on large inputs?

I'm writing some code to procedurally generate some islands in real time. The idea is to choose some points for each chunk, and for each tile calculate the distance from those points, then combine it ...
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1answer
455 views

NLua - How to implement Roblox like function security?

Roblox uses Normal Identities, basicly they assign a lua block/object to a certain number. They use 2 for Scripts and LocalScripts, which can only use non-secured functions, while the command bar can ...
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1answer
1k views

Is it safe to set Lua Table data from multiple C++ threads?

As the title states. I'm curious if it's safe to set data in different Lua tables that exist in the same lua state. From multiple C++ threads. I'm asking this because my current system actually has a ...
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524 views

GMod Lua Scripting - Playing sounds only for specified player entities

I'm making a game mode for Garry's Mod, and I'm trying to write a system in which I play sounds only for certain players. The problem I'm running across is that doing so from server-side would take a ...
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2answers
1k views

Does it make sense to use Lua scripting in a game developed in Python? [closed]

Well for C++ written games using Lua scripts for easy changing ai, quets etc is very reasonable and it's common. However now I'm going to write a game in pure python and I don't know if I should use ...
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2answers
397 views

Switching a project written in Lua to a compiled language [closed]

I am experimenting with game development in Lua using the Love2D framework, and while it works fine, I am getting tired of using a dynamic scripting language. I would like to have better performance, ...
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2answers
230 views

HardonCollider Error: attempt to call method 'addRectangle' (a nil value)

I want to add collision detection mechanism to my game, which is written in love2d. As i do not want to implement my own algorithm, i have found a HardonCollider library to do the heavy lifting for me....
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1answer
80 views

Corona SDK, do I need to pay for it?

I'm a single dev making simple mobile games. I was looking at corona sdk for my next project. I don't understand what the difference between the paid version and the free version is. It seems that ...
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0answers
182 views

Design patterns for live coding/script reloading [closed]

I would like to make C++/Lua combo and write scripts for a game with live script reloading. What design patterns should I be aware of so not to cause me unnecessary pain? For example if I have a ...
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2answers
1k views

How do i set Lua variables?

You can pretty easily read variables, but what about writing them to the lua file? Ive given it a little go, but it doesnt seem to work... ...
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2answers
1k views

Binding class method to Lua

If I have class class Game { public: Game() { level = new Level(); } private: Level *level; lua_State *L; } Where the level ...
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2answers
547 views

Calculating Linear force required to hit a specific vertex on a parabola

The idea is a user presses somewhere on the screen and the program will fire an object in a parabola shape from a defined start position that has it's vertex where the user touched the screen. I have ...
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0answers
254 views

How can I clear the screen on Corona SDK

I have objects on the screen that create the main menu, and I want the the screen to clear when I get press the play button. I did it the way the other question on this subject said, but when I ...
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1answer
125 views

Resource management with Lua integration

I have a questions about how to better implement resource management when integrating with Lua. I have an entity system that has gameplay logic done in Lua. One of the design points was that I wanted ...
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1answer
931 views

Multiple lua scripts using newthread

I'm trying to hook lua-scripts to my entities, where several entities of the same type want to use a separate instance of the same script. Problem is, when I run two or more scripts and use any C-api ...
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3answers
3k views

corona sdk scale images

How to scale images to full screen on all devices, i want to use % The method I've seen so far is to define pixels ...
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1answer
486 views

Calculate future 3D Position of object(Unit)?

I've looked around and almost all examples is see have a velocity vector which I do not have, or at this point am unable to figure out. Im trying to find the 3D position where i can launch a trap in ...
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0answers
789 views

What LuaJit threading archietecture should I use?

I am in the process of designing my own Game Engine for use in a real time CRPG - think Baulder's Gate. I know most of my specifications right now, and I am currently in a planning phase. I chose Lua ...
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1answer
2k views

Garry's Mod HatsChat2 chat colors permissions messed up?

So I'm making a garry's mod server and I'm trying to work on my chat box addon that I installed and was working on that only premium and superadmin can use colors in the chat and only want them to be ...
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1answer
276 views

LOVE Physics - Joint Stretching

After asking a similar question yesterday I've come across another problem with using joints in box2D / LOVE and trying to create a weighted chain. Everything is set up as follows, I've tried to ...
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1answer
707 views

LOVE Physics - Breaking Joint Chains (LUA / Box2D)

Wasn't sure whether to post here or on SO so please move if needed. I've been having a look into the box2D physics API provided by LOVE to try and create a swinging flail or weighted rope but I'm ...
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1answer
26k views

why is Lua so important ( frequently used ) in game development [duplicate]

I have written some small games for fun myself, but never used Lua myself. I have seen people discussing Lua's use in games everywhere. The question is: What benefit can I get from using Lua in game ...
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1answer
548 views

how to close lua file call luaL_dofile?

i created tool that generate lua script on each level which contain lot function, and they named based on the object+id format. ex : trigger1(), etc; so every level may have same function name, what i ...
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1answer
205 views

Handling creation of entities on level creation

I'm currently working on a 2d physics based plat former, kinda in the style of super meat boy. In super meat boy, you have multiple levels and I want a similar sort of thing but is there a general way ...
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2answers
1k views

Lua Implementation

I'm struggling to get Lua implemented into my game engine. I've read dozens of blogs and articles revolving around how to wrap C++ classes and I seem to have hit a wall. No matter how I structure the ...
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1answer
1k views

Is it possible to develop a game with Lua/Löve and have the source code compiled? [closed]

I've been looking at Lua and Löve for developing simple 2D games. But since Lua is interpreted and I know it can be compiled to some point, but how secure is that to decompiling. Or is there a better ...
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1answer
301 views

update image properties

Is there a way to update the location of an image? I'm currently calling my image dynamically using: itemImage = display.newImage(inventory[t.ID][1]) t. being ...
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1answer
247 views

Custom 3D Noise function incorrectly generating in Lua

I have been working on a custom noise generator (not Perlin on Simplex or whatever), which works fine in two dimensional space, but upon converting it into three dimensional space, it turns into a ...
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3answers
155 views

Building a C-E engine in a high level language, how can I integrate optional lower-level components that own overlapping state?

To clarify, by overlapping I do not mean overlapping between said components, but rather, let's say I have: My entity contains components, and a parent-children system. Call it a mandatory ...
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2answers
5k views

How to run multiple Lua scripts within the same lua state without conflict

I've been working with Lua for sometime and there is a problem that I could never solve it. First, I'm using a single lua state to have a connection between my scripts so they could transfer data via ...
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2answers
2k views

How to bind std::map to Lua with LuaBind

Is this possible in lua to achieve? player.scripts["movement"].properties["stat"] = "stand" print (player.scripts["movement"].properties["stat"]) I've done ...
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1answer
5k views

Run Love2D on iphone and android

I have a game developed in lua using love 2d, and now i want to run it in ios/android. Is there any porting or way available to do that. Thanks.
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1answer
595 views

Love2d: Failed to load tileset map

I'm reading the Love2D Development book, which i think i will stop reading because is outdated and very instable, sometimes i got a lot of troubles. Backing to the question, i made a tileset map with ...
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7answers
4k views

Is there any Lua API that works with C# for PC & XBox 360 Development? [closed]

I am reading a book on Game Development in which they show you how to make scripts for your game in Lua. They program Lua and use it from C++, but I was wondering if there is a library or API to use ...
2
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1answer
4k views

Generating transformation matrix for 2D camera with pan/zoom/rotate

Question How do you implement a camera with pan/zoom/rotation for a 2d game? Is it acceptable to multiply together a series of transformation matrixes to generate a final transformation matrix that ...
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1answer
864 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 is ...
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1answer
3k views
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1answer
1k 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 ...
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1answer
1k views

Make an object follow the mouse pointer with LÖVE2D

I've been trying to make a picture follow the mouse pointer with LÖVE2D. I want that the object follow the mouse, and not just be the mouse coordinates, I did that. So I toked the distance between ...
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1answer
249 views

Phone crash when try to use vibration on Android

Im developing an app that when you click a button the phone has to vibrate, the issue is that the phone just chashes. Saing that I need permitions to vibrate. I've already set this permition in the ...
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2answers
842 views

Smooth moving on tile-based map, how to fix simple collisions?

I've already had some experiences about the work of 2 dimensional square-based playfields and moving a player on them. Though, when a square has multiple pixel sizes, and player moves e.g. 1 pixel per ...
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1answer
477 views

file:write restarts Corona app

I am attempting to implement an auto-save feature into a mobile game. I have the following code writing to the save file: ...
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2answers
623 views

Is it possible to develop web-based games using Corona SDK?

Some clients asked me to develop 2D web-based games and later on they might want to release those games on mobile platforms. I know Corona and I don't want to rewrite my code twice. Is it possible to ...
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1answer
157 views

How should I go about protecting my script files?

I am working on a small multiplayer game with a whole bunch of scripting components. I know I can't store my files in plaintext otherwise anyone would be able to change the functionality of core ...
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1answer
96 views

How do I lock drawn lines to be orthogonal to an existing one?

I'm making a 2D game in Corona for Android/iPhone that is similar to Volfied. In my game, the user has to touch the screen to draw a line for the character to move along. How can I force the lines to ...
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2answers
599 views

Using Lua for configuration and localization data

Since my game is already going to be scripted with Lua, I've decided to make all my configuration and localization data defined using Lua tables. For example, this could be a basic locale file: <...
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1answer
429 views

How should I organize Lua scripts so that some entities do not have access to functions they shouldn't?

For my game in C++ I'm using different objects (like player, enemy, et cetera) which will have to be controlled by a Lua script. My problem is that if I were to write a function in my player script, ...
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0answers
51 views

Checking if two lines are crossing [duplicate]

How can I check if two lines (created with function love.graphics.line) are crossing themselves? I may use this ability to create procedural maps via graphs.