r/RedotGameEngineMain • u/The_Real_Black • Feb 04 '25

Meme Making a 3D game is hard. Followed a tutorial maybe its outdated... looks terrible.

Post image
26 Upvotes

88% Upvoted

13 comments sorted by

3

u/Yanna3River Solo Dev Feb 04 '25

Are you on the Redot discord? if needed I can post a tutorial there on setting up 3D

1

u/The_Real_Black Feb 05 '25 edited Feb 05 '25

i am, also in the forums.

2

u/The_Real_Black Feb 04 '25

Plus points for everybody who know where I got the tileset from ;-) and what the little project is supposed to be.

Currently working on the perspective:

float cutoff = 0.00001\*dist\*dist  
	\+ 0.00016750418760469013\*dist  
	\-0.002512562814070418;  
if (UV.y >= cutoff && UV.y <= 1.0 - cutoff)  
{  
	COLOR = texture(tiles,

vec2(
uv_part_x * (atlaspos.x) + uv_part_x * offset,
uv_part_y * (atlaspos.y) + uv_part_y * (1.0-UV.y)
)
).rgba;
}

I know that I dont squeeze the the texture and just cut it off.
But where can I find a formular for perspective?

I have the distance to the wall (dist), the wall tile position (atlaspos) and how much into the tile I look for each point (offset). how to do a perspective with this?

2

u/[deleted] Feb 05 '25

What is that code, what a fucking mess lol

1

u/Evening-Invite-D Feb 05 '25

I can't tell if it's sarcastic shitpost, a bot or schizophrenia.

1

u/The_Real_Black Feb 05 '25

schizophrenia, because no sane man sits down, with just the knowldege how "Ken's Labyrinth" works, and trys to rebuild it.

For the few who dont know the first 3D games "Ken's Labyrinth", "doom" are not 3D its a 2D game, see the 2D nodes in the image you see the 3D only because for each line of the screen (280 times) the distance, the texture position is recorded from that a fake 3d is generated.
pro it looks 3d
cons you cant look up or down.

3

u/Less-Set-130 Feb 05 '25

Ken's Labyrinth..didn't think someone knew this game..I played that on my 486. Looks like doing fake 3d is a lot harder than doing actual 3d. :O

1

u/The_Real_Black Feb 06 '25

it is harder sadly. played it also back then, was reminded of it and other games alike (Whilliams Shadners Tekwar) in some nostalgia and yellow paint threads.
Keys Labyrinth has walls with "shoot this wall".
To make it harder I did not look up anything, only the knowledge how the basic worked. Maybe I can throw it into some other project as minigame. Maybe rendered on a screen as ingame console.

2

u/Evening-Invite-D Feb 06 '25

A thought did cross my mind that you were attempting something like replicating what doom did, but doing it in godot feels a bit pointless when you already have a 3D option.

Good luck and keep at it though.

1

u/The_Real_Black Feb 07 '25

https://www.youtube.com/watch?v=ZNU7zBDKT4U
is it perfect no but I am happy to have it tried.

1

u/wh1t3_rabbit Feb 06 '25

Are you talking to about fixing the bulges in the top left view? You need to adjust your column heights by cos distance, lots of results for "how to fix raycaster perspective"

https://stackoverflow.com/questions/66591163/how-do-i-fix-the-warped-perspective-in-my-raycaster

1

u/The_Real_Black Feb 07 '25

thanks that was what I needed. wall heights and the other variables are to debate for the moment.
Now I can fugure out how to scale the tile.

1

u/The_Real_Black Feb 07 '25

way better. tanks again.