176 lines
4.7 KiB
Markdown
176 lines
4.7 KiB
Markdown
# GAME ENGINE
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## World of Haven : Chaos dungeons
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Je suis en train de développer un moteur de jeu écrit en c99, ayant pour but de créer un jeu rogue-like dans un univers Voxel.
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## networking
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## input
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## thread
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in c99 how does a struct is handled when accessing it's member from multiple thread, do i need a mutex for all of the struct or only for it's member ?
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like i have this struct :
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```c
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static struct {
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queue_t async_tasks;
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pthread_mutex_t async_mutex;
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queue_t sync_tasks;
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pthread_mutex_t sync_mutex;
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queue_t completed_tasks;
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bool running;
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pthread_mutex_t running;
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int next_task_id;
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pthread_mutex_t status_mtx;
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pthread_t workers[32];
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} thread_mgr;
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```
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but should i use a mutex for the struct instead ? is it defined behavior or not ?
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answer:
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each member is a piece of memory. a 'struct' is not a 'real' thing.. it's just a conveneint way for us as programmers to group these related things.
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mutex is required for modifying any piece of memory .. so accessing each item would require the use of a mutex. but it's not very practical to have 10 mutexes. so you have 1 and that serves the purpose of accessing any of them
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then there are exceptions for this on platforms like x86.. where WORD sized items can to read/wrote atomically.
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think about changing or reading things as a single transaction.. if the transaction requires more than 1 member.. you need a mutex.
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yes okay thanks i had a misconception about how struct work (i thinked of them as memory address with different data type contiguous in memory), but okay thanks, so i can access different member at the same time, thanks for your great answer
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yes.. they do appear in memory next to each other.. but there is nothing in code or memory that tells the cpu something is a struct
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NOUVEAU
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[4:47 pm]
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it stops being a struct once it's in binary/asm.
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it's up to you to decide which things you want to associate to a mutex.
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it's just very typical programmer/human that decides the things will be 'this struct' or 'this namespace' or these 3 int's. or a complete subsystem.
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on x86? you'll find anything on the same 64byte span of memory is going to have the most need for mutex.
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this discussion is thanks to AJ the goat.
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## Graphic
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## Sound
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## AI
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## game loop
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## physic
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## animation
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## voxel items
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## terrain gen ::
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/*
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first generate terrain
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then change block type
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then generate caves
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then add minerals
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then generate hydrometrie
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then add erosion and water material displacement
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then add structures
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*/
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### Idea
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discret non euclidian voxel element;
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make the player discover a little bit of the world by himself
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Procedural Dungeon with mob spawn
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Wave mod in certain handcrafted dungeon
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sql >> nosql;
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mongodb; atlas;
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elastic search
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collection pour reduire base de donnee;
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Optimisation des index;g
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Commerce de dofus, et le temps passer sur un craft item /fm augmente ca valeur focus et valeur des auugmentes en fonction des build
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i could add a system with different faction and aggro level
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## CREDIT
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raylib
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raygui
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librg
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fastNoiseLight
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enet.h
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## TODO
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setup and update of shader
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engine setup
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create voxel mesh
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render voxel
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render one voxel
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render one chunk
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render all chunk
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## Naration Idea
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```
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Day 0 is when you start the game.
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Tutorial phase
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Day 12, the force of the shadow advance and start to build a bridge
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First game loop (gather ressources and combat)
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Day 20 The bridge is finished
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mid game, dungeon and exploring the mainland
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Day 50 the force advance through the middle island
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Start introducing the full picture of the story
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player need to reenforce is base
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Day 75 The second bridge start building
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same gameloop as before
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Day 100 the scond bridge is finished and the shadow advance through the mainland
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Start to defend Your City (free build) (biger and biger wave).
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if player start to explore, he enter the third gameloop
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where
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when the player advance to the evil domain (south island), go to the late game where you start your journey to conquer the forgotten land
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you can go back but explored and conquered land will be lost
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the point of the late game is to use what you aquired trhough the early and mid game to go as far as you can, and when you finish you unlock the good ending,
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bad ending when you lose your base,
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neutral / Unending when cannot go to terme on the 999 days (hidden success).
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Pendant plus de 10000 ans, les manikins on prospère sous la montagne. Leurs royaumes s'étend à perte de vue sous terre, les gemmes et les minéraux brillent telle des étoiles donnant le sentiment de ne pas etre enterre, sur le plafond, soutenue par d'imposantes statues.
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Les murs sont recouverts d'habitations avec des mécanismes de toutes sortes.
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```
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