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.
257 questions
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Handling status/effects on a turn based RPG game
I have managed to create a state machine for my game core, like on turn start, on turn end, and another one. Now lets talk about effect/status.
For generic effects such boosting stats for certain ...
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How to move objects in a wavy pattern in a specific or given direction?
I'm making a bullet hell and I want to handle a variety of movement types for my bullets (waves, flying in circles, spirals, etc). I'm currently using the following to handle linear movement at a ...
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How to express parabolic motion using delta time?
I'm trying to figure out how to express parabolic motion (for example: \$y = x^2\$) using delta time. I thought about deriving it using a differential like \$y' = \frac{1}{2}x\$ but that results in a ...
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What does the phrase "Kinematic bodies do not collide with other kinematic or static bodies" mean?
What does the phrase "Kinematic bodies do not react to forces and only collide with dynamic bodies" mean?
Related: I'm always confused by game engine physics explanations
I found this ...
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Predictive Rectangle Collision Resolution Corner Snagging
I've written two main functions who's purpose is to detect and resolve collisions between a moving rectangle and a non-moving rectangle. I have a decent understanding of how the algorithm works, and ...
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Tool stops working after death, but only in the Roblox Client, not Roblox Studio
In the experience I'm currently working on there has been a bug where, after death, the gun tools would stop working unless dropped and picked back up. However, when trying to debug this, I found that ...
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Implementing framerate independent friction with linear deceleration
I'm implementing friction into my game, and I'd like it to be framerate-independent. Here's my first solution, in Lua style pseudo-code:
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How do I go about Mesh Simplifcation in generating multiple LODs?
I have been recently looking for any information on creating multiple LODs (level of detail) for an inputted mesh. However, there does not appear a lot of articles or pseudo code on how to go about ...
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How to go about executing lua scripts in a ECS engine?
I'm trying to add scripting with lua to my C++ game engine, and I'm pretty stumped on how to tackle the executing/processing part. I started by creating a ...
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Checking if I am looking through a window using angles
I am developing a mod for a game with a Lua api.
I am trying to detect if I am looking through from behind a window when I shoot an enemy. For context, when I shoot through this window I apply a ...
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Which part of UnLua for UE5 can be defined at runtime?
I'm looking into options to allow a released UE5 game to be modded, with just "text files". That is, without having to use the Unreal Editor, and give access to the game code, to create the ...
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How to properly split damage against armor?
I am developing a third-person shooting style game and I want to implement an armor system. The system that I have envisioned does not reduce the damage to 0, but by half. So the incoming damage is ...
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Why does my Roblox game delete all parts when testing?
I'm working on a Roblox game, but whenever I test it, none of the parts I added in the game display in the Explorer or in the game itself. It works perfectly fine when I view it in the studio, though. ...
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In my Roblox Tycoon game, my button is not working
I am a rookie at Lua and Roblox Studio in general. I am attempting an easy and reasonably simple tutorial on how to make a pretty good looking tycoon game. In my "Core" script, I am ...
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Why check the ball and brick collision twice?
I watched https://www.youtube.com/watch?v=F86edI_EF3s.
I believe the following code is the complete code
https://github.com/games50/breakout/tree/master/breakout13
And
https://github.com/games50/...
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UDim2.new(a, b, c, d) is acting very strangely
I am using a debugger and (i-1)*50 is equal to 50, but ...
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VR Controllers in Roblox Studio not working as expected
I am trying to create a Roblox game with VR support. My understanding is that this code should move the hands of the character as the user moves the controllers:
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Why is mission planner not reading my Lua script?
Whenever I try to run my Lua script, right after the first function, be it defining a parameter, mission planner (ground control station of ardupilot), display an error message saying unexpected token....
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Attempt to call missing method - Lua (Roblox studio)
I am trying to develop a game in Roblox and I have am cannot call a method on a class that I created. I have added my steps below. I am certain the path to the model is correct and I think I have ...
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LUA Hooks - Command Modern Operations & PE
Looking for examples of utilizing the available LUA hooks for modding the games Command: Modern Operations and the simulation suit Command: Professional Edition.
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Synchronizing in-game clock vs real world clocks across servers started at different times
Regardless if you know how Roblox works or if you know Lua syntax, I just need an algorithm/equation here.
Currently, at the start of each server, I reference the seconds of a centralized clock since ...
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moving an object around a Circle [closed]
I am going to draw a shape like a gear, how can I move a tooth around a circle?
Something like the image below :
For example, I need to draw 20 teeth at equal intervals around a circle with a ...
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cyclic dependency error in roblox survival game
Description
In my game, I have have 3 module files: "PlayerList.lua", "PlayerData.lua" and "WorldData.lua".
PlayerList.lua = a list of PlayerData classes (requires ...
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What's the most basic way to create and handle multiple objects?
I'm trying to figure out what the most basic approach would be to effectively (or at least more effectively than what I have) create and manage objects. I know I could store them in a table when I ...
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Numbering sprites in a sprite sheet left-to-right, top-to-bottom
I'm using this program called Quadtastic which is a sprite sheet management tool that lets you define quads on a sprite sheet, name them, etc, and export to metadata with those names (+ position, size,...
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How to add a save/load game function to a Lua/C++ game engine
I'm curious what the best approach would be to save the current state of my game.
The lua scripts contain the gamestate, but also some gameplay related info that doesn't need to be stored as part of a ...
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How do you clone a part to the Player in Roblox?
I have been making a game in Roblox, But I had one problem.
I wanted to make a debug GUI that one can use to spawn items at the Player Location, but I do not really know how to copy it to the player ...
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Rotating an object in a circular path (using time)
I want to move an object in a circular path but I want it to complete its movement in that circle when the time ends.
I tried doing this:
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How to deal with rapid acceleration/deceleration from physics forces?
I'm working on a game in LOVE2D using Lua, where you pilot a drilling vehicle. The idea is that as you drill into different surfaces, you speed up/slow down depending on how dense that surface is. I'...
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Applying quadratics to velocity based player movement
In a speed based system where player.x and player.y +=1 when a button is pressed, a 3pt quadratic can be calculated via
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How do I get the consistent time it would take for two points to reach each other in circular motion?
I'm making a 2D game. It involves the player swinging around a grapple hook in perfect circular motion, however, I want to make the cooldown for this ability based on predicted end position for the ...
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Find the smallest angle to turn between two angles in range 0..1
I have a function for approaching a value to a target by a certain amount:
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for loop problem
So it works first time when the player dies. But when it dies twice the for loop doesn't work.
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Drawing rectangle with line's causes join artifact with the graphics api
how can I join lines to draw rectangles, I get this artifact like this, here's my code:
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Using Lua to define NPC behaviour
I'm working on a RPG in C using Lua for event scripting like NPC behavior. I ran into a design problem.
I have created Lua threads in the C API for each game object which can be a NPC. So this:
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How to get started in game development with Lua without LOVE or any game engine [closed]
Recently, I've been wanting to get into Lua, and I just started to. I was wondering if it is possible to make a game, without the LOVE engine, like are there any built-in libraries I can use or ...
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How can I allow my players to create, save and use moves?
I want to create a system to allow the players to create, save then use moves in Roblox Studio.
My first thought was to do this by letting them create animation files in Roblox Studio, but I'm not ...
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Pathfinder is making my NPC follow my oldest position only
I am trying to make a maze/horror game. I used an online template in the Roblox library as my enemy. I used pathfinder as you will see in the code below. It's finding me like it's supposed to, except ...
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Play and Pause State
Problem
i want to implement a pause state and with a simple conditional inside the update of PlayState is very very simple.
However i think that the pause has to be another state in the StateMachine ...
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How to fix diagonal velocity being greater than axis-aligned?
I have a 2D top-down RPG type game, with movement in 8 directions (N/E/S/W/NE/NW/SE/SW) involving both x and y velocity.
I'm finding when I'm moving in the diagonal directions, I'm building both x and ...
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Rotate relative to set point in a specified direction in a 3D space
I know there's a geometry formula to calculate the next point in rotation relative to another point in 2D but I'm working in 3D and I want to calculate the next position in specified direction as well....
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Binding Lua Function to Perform tasks using std::async
I am trying to load a bunch of mesh resources in the format of .obj files. Some of the files are very high in poly count so when loading using the below method It takes more than 10 seconds. I would ...
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How to connect a GUI button to function?
I am developing a new Roblox game where you can setup and control you're own virtual machine using SurfaceGUIs on a modeled screen. I am trying to make a confirmation GUI
where if you click YES, then ...
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Optimizing falling sand simulation
So, for the past couple of weeks, I've been working on a falling sand simulation inspired by games such as The Powder Toy, Noita, and Sandspiel. I've been making it in Love2D and I'm please with what ...
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When PlayerRemoving event is fired, for loop does not work properly
while I was implementing the Backback save feature in my Roblox Game (using game.Players.PlayerRemoving:Connect(), I found that when I used a loop of any form (<...
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Hiding World of Warcraft UI Elements with Lua
I'm tyring to make a very simple WoW addon that hides the gryphons on either side of the main menu bar and hides the micro buttons in the lower right. The addon has one Lua script, main.lua:
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Integrating Moonsharp with Unity for Nintendo Switch project
Has anyone tried to run Unity project with integrated Moonsharp on Nintendo Switch? Can it be done? Are there any significant performance issues due to running Lua scripts?
EDIT: Sorry, I wasn't ...
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Facing issues trying to Parse JSON in Lua
Problem statement:
Need help trying to load a JSON file into a table array in Lua for Corona SDK development.
My Objective:
Call specific data from JSON file to my application by using key value ...
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How is tile offsetting accomplished in 2d side scrollers?
The idea is to work with tiles that together make up a larger image, or world so to speak.
but im confused as to what the methods used are to offset the tiles, and whether is a good idea to draw ...
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How to make the player unable to change some of the game elements?
I am making a text turn based RPG fighting game in which you create your own spells. You also share them as JSON files with your friends. Sharing is required to win.
The game is designed so that it ...
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