island scene, renderer rewrite from rust (C++, Vulkan) | Graphics Programming | Page 2

opaque fable May 13, 2023, 3:46 PM

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3d particles 🙂

opaque fable May 14, 2023, 9:27 PM

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finally got instanced rendering for normal meshes stonks

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left anchor May 14, 2023, 9:43 PM

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Cat forgot to clear the backbuffer

opaque fable May 14, 2023, 10:10 PM

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i like it

opaque fable May 15, 2023, 7:23 AM

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free trial here we go

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i've used designer a bit before, but i wanted to give painter a try too

opaque fable May 15, 2023, 7:48 AM

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rushed texture job to get a quick feel for it

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seems powerful

opaque fable May 15, 2023, 4:52 PM

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did a bit more texturing work, it's kinda fun even though I have no idea what I'm doing

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i need to stop working on these damn barrels though 😅

left anchor May 15, 2023, 4:53 PM

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Time to rename the thread to barrel dev

opaque fable May 15, 2023, 5:01 PM

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😁

left anchor May 15, 2023, 5:03 PM

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it is a nice barrel

opaque fable May 15, 2023, 5:05 PM

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hopefully next time I can show a plane of some sorts

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tonight's tutorial

left anchor May 15, 2023, 5:13 PM

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today on youtube: shirtless man designs plane in blender while being held at gunpoint

opaque fable May 15, 2023, 5:16 PM

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i'll have to go shirtless while i follow along

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maybe it unlocks something

left anchor May 15, 2023, 5:16 PM

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thats part of the tutorial yeah

opaque fable May 15, 2023, 11:46 PM

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modelling is hard as shit

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simple plane though

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i think I need to start a bit smaller with modelling

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so I actually learn why I'm doing what I'm doing

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all I know atm is inset and extrudeee

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also uv mapping no clue

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well how to uv map anyway

opaque fable May 16, 2023, 12:54 PM

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knocked up a quick gun on my lunch break

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well just a basic model, then got it rotating nicely

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i need to figure out the best way of doing things with blender, ideally I could make the plane in blender with the turret on so I can easily adjust scale etc but atm I'm just changing their position in my game

opaque fable May 17, 2023, 10:32 PM

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crate practice

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first one looks terrible

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my friend at work gave me a few tips for blender

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so that's beenm really helpful

opaque fable May 18, 2023, 10:27 PM

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crate progression

left anchor May 18, 2023, 10:28 PM

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These are pretty nice

opaque fable May 18, 2023, 10:28 PM

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i just keeping ask my environment art friend for help lol

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he's very handy

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i'm just afraid to model something that isn't a cube 🥵

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thank you 🙂

left anchor May 18, 2023, 10:30 PM

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I like the texturing :)

opaque fable May 18, 2023, 10:30 PM

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honestly substance makes it so easy

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i'm just using the stuff that comes with it

left anchor May 18, 2023, 10:33 PM

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Maybe soon you can use andromeda for drawing your terrain kekw

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it is slowly but surely becoming somewhat usable

opaque fable May 18, 2023, 10:35 PM

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hehe that would be cool, I've been quite busy the past few days but it's been cool to see your progress

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i was showing someone at work too 🙂

left anchor May 18, 2023, 10:35 PM

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👀

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verihappi

opaque fable May 18, 2023, 10:36 PM

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honestly terrain stuff is so fun and there's so many different things you can do with it

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so i'm looking forward to seeing what different things you add

left anchor May 18, 2023, 10:36 PM

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Yeah I chose it because it's narrow enough to keep me focused on one goal but broad enough to do lots of things for a while

opaque fable May 18, 2023, 10:38 PM

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definitely, can't wait to see erosion 😉

left anchor May 18, 2023, 10:38 PM

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thats definitely coming :)

opaque fable May 22, 2023, 4:03 PM

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going awol for a bit, life got in the way 🙂

left anchor May 22, 2023, 4:06 PM

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o7

opaque fable Jun 9, 2023, 9:35 AM

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im going to regret not documenting properly when I get back to this 😅

opaque fable Feb 10, 2025, 1:23 PM

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https://tenor.com/view/wwe-the-undertaker-what-annoying-scared-gif-5444484

Tenor

opaque fable Feb 10, 2025, 1:24 PM

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opaque fable im going to regret not documenting properly when I get back to this 😅

1.5 yrs on, lets see how true this

opaque fable Feb 10, 2025, 1:59 PM

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might rewrite in C++, considering that's what I've been using at work the past 3 years, albeit without the training wheels of Unreal

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i haven't touched Rust since this project and while I enjoy it, i doubt I'll be using it professionally anytime soon

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also it'll make me rego over everything graphics related and reimplement it

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i will miss the crate system though

opaque fable Feb 10, 2025, 2:35 PM

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perfect, starting Wednesday I'm beginning again in C++ lol

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Renderer Rewrite (C++. Vulkan)

floral hemlock Feb 10, 2025, 3:23 PM

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opaque fable perfect, starting Wednesday I'm beginning again in C++ lol

why do you switch back to c++ from rust?

opaque fable Feb 10, 2025, 3:24 PM

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i haven't programmed anything in Rust since I dropped this project, I've been using C++ the whole time since

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and rewriting will force me to go over each bit of the project again, of which I've forgotten a fair amount

opaque fable Feb 10, 2025, 5:32 PM

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zar_gfx, renderer rewrite (C++, Vulkan)

opaque fable Feb 10, 2025, 6:29 PM

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cool, I've got vkguide downloaded and building as a base

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i'm going to follow that seen as though it's updated, it might give me some ideas for structuring things

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then start to bring over some of my helper abstractions

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and go from there

opaque fable Feb 12, 2025, 3:30 PM

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vulkan, we meet again

opaque fable Feb 13, 2025, 4:28 PM

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yippee

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mostly just following vkguide, but ported my resource manager across to C++

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been looking back at my old project

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i did a lot more than I give myself credit for!

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but most of it was structurally rather than graphics side

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i want to ensure I'm doing more graphics features this time

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less worrying about optimal code solutions and more just good enough ones

opaque fable Feb 14, 2025, 9:28 AM

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thinking this morning, one thing I have always failed to do in vulkan is make it easy to add custom materials

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so I'm going to make that one of my first goals

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so that I can more easily mess around with shaders

opaque fable Feb 14, 2025, 10:41 AM

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well, custom in that I can load up a shader from outside the renderer instead of just having one for all of my meshes inside the renderer

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i'll probably just use the same layout in the material buffer for all of them, so then they can all use the same pipeline

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if you were to have different layouts, I guess I could make a material buffer per pipeline 🤔

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because that's the only thing I would be changing

opaque fable Feb 15, 2025, 4:05 PM

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ok, so I decided to pretty much just delete all of the vkguide stuff and start over

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because it was helping me get back to a point where I could continue on similarly from where I was, but it's making me gloss over all those steps of frustration of figuring things out myself

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and how i actually want to structure stuff

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and I already know a good 75% of whats happening, it's more the handy structures that are made in it for automating descriptor pool allocation etc, which I can always reference

opaque fable Feb 17, 2025, 12:59 PM

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aight, it's been a bit of a mess, but getting somewhere

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every 5s i have to remind myself not to try and abstract everything and get on with programming

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i made a MeshPool class that stores meshes in big buffers for me, I was going to make that also handle copying the data and telling the device to copy it from a staging buffer, but I decided that it probably shouldn't be responsible for doing that

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i had made a device class and stuff for it to be able to do that

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i just deleted that

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so now it just holds the buffer handles it needs and has a slotmap which stores where the meshes are stored within those, when i add a mesh to it it just returns where to put the mesh

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technically I could call that and then just not upload the mesh to the buffer and it would be a big empty space it's keeping track of, but meh. works for now

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just trying not to make things harder to reason about

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and pass dependencies only when I need to

opaque fable Feb 17, 2025, 5:25 PM

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setup my bindless image array

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was struggling with writing the descriptor until I realised I missed the pNext for passing the extra info needed

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next is to get image loading in, atm I can only make them

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so gotta do that + generate mip maps

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then it's make an island time

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gunna make an island, with water around

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and then put some shit on the island

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just like i did in university

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but this time make it look 10x better

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the concept

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island scene, renderer rewrite from rust (C++, Vulkan)

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then I can chill on the island once I'm unemployed KEKW

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oh I could try make some dope ass music for it too

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hell yeah

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can't wait to be drawing stuff to the screen again

opaque fable Feb 18, 2025, 12:53 PM

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nice

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bindless textures working

opaque fable Feb 18, 2025, 3:55 PM

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thank you learn opengl + vkguide

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had to consult guides more than I was hoping for, but I haven't done graphics in a while, so I'll let myself off

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now I'm on my own path to making this island at least

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and I've already added stuff on top so it's not like I'm 100% just the same as the guide

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gunna get instanced drawing working and then I'm making me island

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should just be a case of setting up an instance buffer

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i do need to look into BDA properly because vkguide was using it so I'm using it for my vertex buffer atm, so I might be able to use that for my other transform/material etc buffers I would usually throw in a descriptor set

honest torrent Feb 18, 2025, 6:12 PM

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nice

opaque fable Feb 18, 2025, 9:57 PM

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just did the buffers the way i know how to for now 👍

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instance draw yippee

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maybe I'll look into indirect one day

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this is probably already overkill for now

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considering ya know

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there's 10 quads in the scene

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i was hoping to have the basics of the scene setup today but things took a bit longer than I thought

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so tomorrow

opaque fable Feb 19, 2025, 10:39 AM

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was having some interesting issues trying to draw a second mesh

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turns out I wasn't calculating the offset into the vertex & index buffer in bytes

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when I was copying stuff

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all solved now though, was a bit awkward as I was just getting VK_TIMEOUT or VK_ERROR_DEVICE_LOST

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opaque fable Feb 19, 2025, 11:06 AM

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nice

opaque fable Feb 19, 2025, 3:37 PM

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opaque fable Feb 19, 2025, 4:28 PM

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need to make the terrain not just a plane, but nearly there

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wondering how to handle my different materials

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so I have a Material buffer which atm just has a texture to use

struct MaterialData {
  int textureHandle;
  int padding[3];
};

but obviously my water is going to need different parameters than my terrain, which will need different parameters than all my other objects(probs going to do a terrain shader that blends between heights).

i'm thinking that for each material type, i make a buffer for it. then, when I pass my material buffer device address to the pipeline, i just hook up the correct buffer for the pipeline. and in that shader it assumes that material buffer is laid out a certain way

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For example:

struct WaterParameters{
  float speed;
  float amplitude;
};

struct TerrainParameters{
  float blendHeight;
  float blendStrength;
};

struct DefaultMaterialParameters{
  float blendHeight;
  float blendStrength;
};

// Shaders:

layout(buffer_reference, std430) readonly buffer MaterialBuffer{
    MaterialParameters materials[];
};

layout(push_constant) uniform constants
{
    VertexBuffer vertexBuffer;
    MaterialBuffer materialBuffer;
} PushConstants;

// Water Shader 

struct MaterialParameters {
    waterParams...
};

// Terrain Shader 

struct MaterialParameters {
    terrainParams...
};

// Default Shader 

struct MaterialParameters {
    default params...
};

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also, probably need to find a better place to store the vertex and material buffer rather than push constants.

the vertex buffer doesn't change atm, I just have a huge one, so that could easily be stored somewhere.
in this case though, materialBuffer would obviously change per material, so would need to store all of the different buffer addresses in a buffer somewhere

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i'm just making this up on the spot

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need to think more about it

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I wonder:

MaterialInstanceBuffer which holds Material Buffer Address and Index into it
MaterialBuffer for each material which holds material params for each material instance of that type

Then:

InstanceData has an index into MaterialInstance buffer which it can then use to grab Material parameters

honest torrent Feb 19, 2025, 4:59 PM

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opaque fable turns out I wasn't calculating the offset into the vertex & index buffer in byte...

do you have layer messages enabled?

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I have a very similar layout, for shaders as you, except I just have one shader for drawing opaques,

opaque fable Feb 19, 2025, 5:01 PM

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im using vkconfig, but I think I need to change the preset

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as on further inspection it's missing some options

honest torrent Feb 19, 2025, 5:02 PM

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I turn on sync validation after I make changes to how I send data

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or if I add a layout transition etc

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I also turn on best practices every so often to see if I need to fix anything

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it's really slow so I don't leave those on

opaque fable Feb 19, 2025, 5:05 PM

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i just turned most things on and there's nothing too worrying there, so that's good

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but yeah I will probably have a general purpose shader for drawing most of my objects too

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the terrain and water are just special cases

opaque fable Feb 19, 2025, 5:59 PM

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excellent

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honest torrent Feb 19, 2025, 7:37 PM

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I like sine waves

opaque fable Feb 19, 2025, 10:24 PM

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ye

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its a start

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spent the rest of the evening making it so now I can just make a RenderModel with the material, mesh and modelMatrix and it'll get sorted and drawn

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was previously just manually doing all the draws for the two different materials

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so now it's super easy to add more of an object

opaque fable Feb 19, 2025, 11:27 PM

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messed around with using noise to colour it instead of a texture

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tomorrows goals:

actually make the island
load skybox so there is no black void
profit??

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oh and add depth foam to the water

honest torrent Feb 20, 2025, 12:44 AM

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also reflections in the water, fresnel and underwater caustics please

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skydome reflected from the water

opaque fable Feb 20, 2025, 9:07 AM

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yes 👍

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i will do my best

opaque fable Feb 20, 2025, 4:29 PM

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been trying to get a skybox working for the past 2 hours

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idk whats different

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i've implemented them in vulkan before but I can't figure it out lol

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nevermind

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i did have it working

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my skybox just looks like ass

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opaque fable Feb 21, 2025, 7:41 AM

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ok so I finally got my skybox working with reverse Z

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i was messing around with the depth bounds for ages, then realised I didn't have the bound test enabled

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thank god for renderdoc

opaque fable Feb 21, 2025, 8:36 AM

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not an actual island yet, but that's due to my blender lack of knowledge

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but loading in a gltf 🙂 just a simple version for now

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honest torrent Feb 21, 2025, 9:43 AM

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looking great!

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very nice

opaque fable Feb 21, 2025, 9:46 AM

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thank yoy

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still early days

opaque fable Feb 21, 2025, 12:33 PM

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hell yeah

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opaque fable Feb 21, 2025, 1:15 PM

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visual ore Feb 21, 2025, 2:24 PM

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Nice

opaque fable Feb 21, 2025, 3:35 PM

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just spent half an hour chasing down a sync issue only to realise it was rivatuner

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what a bastard

honest torrent Feb 21, 2025, 5:05 PM

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Looking super, this wip submission references tessendorf, maybe you already know all this but thought it would be relevant to you if you didn’t #wip message

opaque fable Feb 21, 2025, 5:15 PM

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yeah I saw that lol

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there's no comparison 😅

opaque fable Feb 22, 2025, 10:18 PM

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not done too much today graphically, but got material instances working

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setting up the code was a lot more work than I expected it to be C++ side

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but i got there

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not particularly happy about the quality of the code, but it's a start

opaque fable Feb 22, 2025, 11:20 PM

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made some simple imgui that lets me change the material parameters nicely

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probably a bit overkill but it's nice to have debug and see things change in real time

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tomorrows goals: create a new shader for the terrain then add some basic lighting onto it

opaque fable Feb 22, 2025, 11:58 PM

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horror island

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opaque fable Feb 23, 2025, 9:23 PM

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terrain has it's own shader now 👍

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no lighting as of yet

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oh

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i just realised my mipmaps weren't being generated for the images

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also reduced how much they tile

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as it was wayyyy too much

opaque fable Feb 23, 2025, 10:56 PM

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tomorrow: lighting!

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gunna just do a directional light for now, don’t have a ton of use for pointlights/spotlights yet

opaque fable Feb 23, 2025, 11:32 PM

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before I head to bed: skybox reflections on the water

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remembered I had done that at university

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harder to tell in a still image but it's nice to see them move in the water

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clearer image you can see at the bottom where it gets stretched on the wave

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nabbed the code that's calculating my normals for me from uni code, so need to actually dissect it and remember what it's doing another day

opaque fable Feb 24, 2025, 6:53 AM

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so i was actually calculating linear depth wrong

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i was doing depth/near plane lol

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which was my water "distance factor" had to be so high

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it all makes sense now 😄

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i've added an invLerp now so that I can just say the linear distance i want it to fade between

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result is a lot looking different blend but thats ok

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added some foam too

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n

honest torrent Feb 24, 2025, 7:42 PM

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great progress

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wow

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needs trees now

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you know in Civ I always like to create custom island maps and play a sea faring civilization and build a huge navy power

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islands are fun

opaque fable Feb 24, 2025, 9:00 PM

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islands are fun

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cheers!

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trees is on the agenda

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also maybe grass

honest torrent Feb 24, 2025, 9:01 PM

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you'll probably want to add shadows after you add trees

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if you don't have them already

opaque fable Feb 24, 2025, 9:04 PM

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Oh yeah lol

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Forgot about shadows

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i’ve done them before but they were pretty ugly

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so I wanna make them nicer this time

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just gunna start with directional light shadow

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and try do csm

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hopefully with my material stuff i've been doing it should be fairly easy to setup the shadow pass

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but we'll see

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there's still a fair amount of boilerplate and duplication when I need a new pipeline

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but I'm trying not to bikeshed too much

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because I'll just pick out the more useful parts into a library once I'm done anyway

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ok, so I'll:

add trees in (will need to work on gltf loading so I can load up a scene with them in from blender, atm it's just simply loading the mesh in)
add in shadows which I can stress test on all the trees
implement pbr

honest torrent Feb 24, 2025, 9:47 PM

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I am never happy with my shadows but they are always getting a little bit better

opaque fable Feb 24, 2025, 10:16 PM

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they can be hard to get right from what I remember

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what types of shadows do you have?

honest torrent Feb 24, 2025, 10:22 PM

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just one cascade right now

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which I guess is not really a CSM, but it is written as a CSM with one cascade

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it is a directional light with an orthographic matrix

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I don't have point light shadows

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not yet

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I will though

opaque fable Feb 24, 2025, 10:40 PM

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very nice

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sounds like you are on the way at least

honest torrent Feb 24, 2025, 10:41 PM

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I hope so 😅

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you are making great progress yourself

opaque fable Feb 24, 2025, 10:41 PM

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i remember doing point light shadows at university and i remember doing it a pretty scuffed way

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or it felt scuffed

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maybe that was just opengl lol

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i'm just redoing stuff I should have learnt a lot over by now

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i still haven't done much new in my rewrite compared to my rust engine I had

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but I'll get there

honest torrent Feb 24, 2025, 10:42 PM

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why'd you change to C++?

opaque fable Feb 24, 2025, 10:44 PM

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i haven't touched rust reallyy since I did that

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and I couldn't be bothered to try and pick it back up

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i didn't have a great grasp on the language back then so it was a lot of learning it while trying to make an engine

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and I thought I'd just avoid it this time around

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and it's also nice to get to use C++ on it's own, at work I use Unreal Engine, so the C++ there is easy mode

opaque fable Feb 25, 2025, 11:21 AM

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ok I knew something was up with my specular code

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i was calculating the direction when I already had the direction lol

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also just removed the calculation for my terrain because it does not need it at all

opaque fable Feb 25, 2025, 12:22 PM

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trees! but all using the wrong material lol

opaque fable Feb 25, 2025, 5:10 PM

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trees

honest torrent Feb 25, 2025, 5:56 PM

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nice

opaque fable Feb 25, 2025, 10:36 PM

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i was messing around seeing if I could just integrate Streamline so I could setup DLSS in the future

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but having cmake problems + it doesn't seem to like working with the vulkan imgui default backend

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thus I give up for now

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idk why I was trying to do it anyway

opaque fable Feb 26, 2025, 4:16 PM

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disgusting shadows

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but shadows none the less

honest torrent Feb 26, 2025, 4:23 PM

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wow that was quick

opaque fable Feb 26, 2025, 4:33 PM

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yeah, there's a bunch of issues to work through though

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there's self shadowing

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they dont look good at all

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and the water doesn't appear to be putting them in the right place when I tried to add it to it lol

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but its a start

opaque fable Feb 26, 2025, 4:57 PM

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also, for the trees, need to discard their alpha in the shadow pass

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i have a lot of refactoring to do code side to clean up how I'm handing my render passes

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atm i just have an enum and do different things based on that

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but I'm going to make an actual struct I think

opaque fable Feb 27, 2025, 8:56 AM

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worked on shadows a bit, looking a lil better

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the trees now discard using their texture

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that was a bit annoying to sort

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so I have material buffers for each material, and they store the instances of that material

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for each object I draw I have an entry into an instance buffer which has an index into a transform buffer, and an index into a material buffer

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because those material buffers are separate, the indices can overlap with each other between different materials

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but for a shadow pass I just want one buffer filled with what texture to check to discard against if there is one

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so I have to go through each material, copy it to that buffer and then keep at which offset it was put into the discard material buffer

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then I just offset the material buffer address when I'm drawing the objects in the shadow pass

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it works, but it seems obtuse

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and overcomplicated

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i can see now why you would want some way of essentially saying for material X, this would be the diffuse output (like in Unreal for example), because then instead of manually converting between my CPU structs which have their own versions of image handles, you could just say for material X, what is the diffuse output

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i guess the reason I have this overcomplicated conversion step is that I could just run a version of the shadow shader for each material, but the material structs are different for each one

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so that would require me to have 2 different versions of the fragment shader, one that could pull out the diffuse from an opaque material and one that could pull out the diffuse from the terrain

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not like the terrain even needs this alpha discard functionality for shadow passes

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but I guess my intention would be for future objects

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for now though, I'll stick with this jank conversion step

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and take a look back at it again if I ever try to generalise my materials more

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for now I just have a few different CPU structs stored in a variant, then on the renderer side it just converts it into vectors of each of them but in a GPU struct version

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that way the interface is nice for the CPU side and then the GPU version is where all the texture handles get converted into bindless indices

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it's very verbose and each time I make a new material I need to add the pipeline for it, setup the material buffer for it, setup the CPU and GPU versions of the structs, setup the conversion step, add the copy buffer step etc

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but it's some form of material support

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which is more than I've ever had before

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opaque fable Feb 27, 2025, 9:43 AM

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oh yeah I also changed how the terrain shading works

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need to make it blend now

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atm I just have hard ifs for normal gradient and height

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wanna add rock too so that there isn't a pile of sand

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and then triplanar mapping

opaque fable Mar 5, 2025, 10:47 AM

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not much progress made tbh, just trying to clean up my renderer a bit

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considering how huge it is

opaque fable Mar 7, 2025, 12:13 PM

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inside sponza while I work on lighting & shadows 👍

opaque fable Mar 7, 2025, 12:38 PM

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probably need to look into this at some point

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it looks a bit naff

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probably hard to though

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🤷‍♂️

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i got CSM implemented today

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just followed the logl tutorial for now

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need to clean up a bunch of stuff

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loading sponza so I had to modify my basic asset loading code too

opaque fable Mar 7, 2025, 4:17 PM

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ok so I may have done someting cursed

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i have a resource manager i use for creating buffers and images that gives out Handle<Image> etc

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and that's handy in all my utility classes where I can pass a handle instead of the actual vk objects

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but anytime I want to pass a swapchain image, I need to then find some way of handling both cases

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so I've just decided to make it so I can add images into the resource manager myself

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even though they aren't really managed by the ResourceManager

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amazing name of course

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oh well

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maybe there is a case for keeping them separate but for now I would rather have the utility of being able to access all my images with a single handle type

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and if it bites me in the arse I can refactor later

opaque fable Mar 9, 2025, 4:24 PM

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had the ImGUI srgb fun today after realising how dark everything was

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just modified the shader for now

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well actually

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it was because I made my swapchain SRGB

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and then obviously it fucked up ImGUI

opaque fable Mar 10, 2025, 10:57 AM

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adding normal maps

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turned out to be quite faffy

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but I'm there

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generating unindexed vertices -> using mikktspace to get tangents -> using mesh optimiser to weld them together

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i believe is the right steps

opaque fable Mar 10, 2025, 11:22 AM

#

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the helmet is back

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now I just need to actually work on lighting

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and make it look good

opaque fable Mar 10, 2025, 11:40 AM

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added some super scuffed and very incorrect sampling from the skybox

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but it looks neat!

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made the water less bright

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and also respect the ambient light

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before it was essentially emissive lol

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opaque fable Mar 10, 2025, 5:06 PM

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god

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everytime i have to add a new library in C++ i die a little inside

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but I now have spdlog

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it wasn't playing nicely with fmt

visual ore Mar 10, 2025, 7:45 PM

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opaque fable everytime i have to add a new library in C++ i die a little inside

Yeah rust's cargo is a drug

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Until u get some errors with it because conflicts

opaque fable Mar 11, 2025, 8:28 AM

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yeah

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i have probably blocked out any problems I had with it

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but C++ messages always so confusing

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i need to speed up my asset loading as it's starting to irk me

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over 1s in release, i tried removing some tracing but really the problem is that I'm loading from gltf every time

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and especially when I'm using mikktspace to generate tangents everytime, there's a lot of wasted time everytime I load up the program doing the same thing

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i've never made my own binary format but that'll be the way to go

opaque fable Mar 11, 2025, 9:37 AM

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cool, I've got some vertices and indices being written to a file and loaded back

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but obviously for a full GLTF model I'm going to need a lot more than that

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need to handle multiple meshes, then haven't even though about materials or textures yet

visual ore Mar 11, 2025, 10:14 AM

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Good luck

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Also cant you use glb??

opaque fable Mar 11, 2025, 12:25 PM

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i need to generate tangents after I've loaded it in

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so it's easier to just save it back to my own format

visual ore Mar 11, 2025, 1:11 PM

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Ahh i get it now

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Best of luck

opaque fable Mar 11, 2025, 4:54 PM

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it's quicker!

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all back up to the same functionality now

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debug mode is no longer horrible with sponza

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and i have old poo poo sponza

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god forbid i tried to load intel sponza

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atm I'm just dumping the textures data into the file along with everything else, but I'll probably need to modify that at some point

opaque fable Mar 11, 2025, 5:57 PM

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tried to load intel sponza

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as expected

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death

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but that's ok

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I know for a fact I'm not handling the gltf format correctly in terms of transforms and things

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and then the textures are facking huge

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so I would need to figure out how people compress them

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for now, old sponza

opaque fable Mar 12, 2025, 9:43 AM

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👍

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so my rotations were always borked importing from fastgltf

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because i'm an idiot

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and didn't check what the rotation value actually was

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i was doing a rotate around a vector when it's a quaternion lol

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the only thing is atm I bake all of the child transforms when I cook, so each node just has a transform and it doesn't have to consider child/parent etc

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but I should really preserve those relationships so it's actually useful data once you load in the cooked mesh

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but for now it's one less thing to do

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and I'm not moving objects around in the scene once cooked so it doesn't matter too much

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and then I don't have to think about how i would handle all of that yet

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tbh I'm kinda just bikeshedding the past few days

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instead of working on the island

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but it's been nice making my import process more functional

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and I've made my own binary format! which is cool

opaque fable Mar 13, 2025, 11:52 AM

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messing about with grass

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just handling it through my normal rendering pipeline for now

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will push it through that until I need it to perform better

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want to turn off drawing the grass to the shadow pass, so that's something new to add to my materials

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because I don't necessarily need a whole new material for it, it's just: don't include it in this pass but draw it the same way otherwise

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because as soon as the light gets more angled, you can see how having the grass in the shadow pass starts to mess stuff up

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the shadowing on itself doesn't look good at all

opaque fable Mar 19, 2025, 10:57 AM

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scrapped messing around with grass for now

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adding deferred in

opaque fable Mar 20, 2025, 10:35 AM

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progress slowed down but still plodding away

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not sure how I'll handle materials in deferred land yet

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but atm my understanding is that I'll probably share vertex shaders for forward and deferred materials, the fragment shader will then be different for each one

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but in both cases I want the lighting calculations to be the same

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just happening in different places

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for now because I'm just back down to one material type, i don't have to worry about that

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realistically most of my materials are going to be either forward or deferred, not both

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so I just need to figure out a nice way of sharing the lighting code across all those shaders so I'm not duplicating them

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even if it's just a function I pass a bunch of params into

opaque fable Mar 20, 2025, 6:34 PM

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finally got round to moving my mesh binary file logic into a library instead of part of my engine

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so now i should be able to make a program that just runs that logic on a file, and call that as part of my build process

opaque fable Mar 20, 2025, 10:09 PM

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nice

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opaque fable Mar 20, 2025, 10:32 PM

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yippee

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deferred equality

opaque fable Mar 20, 2025, 10:51 PM

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didn't take as long to set up deferred as I expected, although I guess I done it a few times

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my gbuffer layout probably isn't ideal atm but oh well

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currently got:

colour : VK_FORMAT_R8G8B8A8_SRGB
normals + roughness: VK_FORMAT_R8G8B8A8_UNORM
emissive + metallic: VK_FORMAT_R8G8B8A8_UNORM

but thinking, seen as though emissive is also colour data, it should be sRGB? or I should just handle the conversion myself

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still a lot for me to learn about colour anyhow

opaque fable Mar 21, 2025, 10:33 AM

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added my own sun in this morning

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need to find a skybox without one on now

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also setup an executable to bake assets for me, so i now have it setup as part of the build process

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and it's already compiled into an executable so no need to recompile it everytime

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so much speedier 👍

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just realised there's something going wrong with my mesh here lol

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this will be fun to find out

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ah man im such an idiot

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been modifying the cooker without building a new release version

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hmm, still something weird going on

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im just confused when this happened

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looks like I fixed this and then my tangent calculations break

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hmm :/

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ohhh

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im such an idiot

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i thought I had fixed a bug in my code when I was unindexing my mesh to prepare for mikktspace calculations

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but i actually had it right the first time lol

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ffs lol

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back to normal

opaque fable Mar 24, 2025, 11:22 AM

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added a little debug combo box

opaque fable Mar 24, 2025, 5:37 PM

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did some work on my binary format

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textures are separated out into their own files now

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on second thought, not sure I needed to do that

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was going to try and start compressing my textures

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and for some reason felt it would be easier in their own files

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but really it should still work as part of one big binary file

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there's probably other benefits to having them separate from the main file

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but I'll leave it as it was for now

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also, pretty sure that'll just compress the files on disc

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need to read more about gpu texture compression

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ah ok, looks like i need dds

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hmm, so if I'm understanding correctly, i need to compress the textures ~~within vulkan~~ and then save back to disk?

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and then next time I can just load the compressed texture

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and not deal with png/jpg etc

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or you use some tool beforehand to compress the textures the first time

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ok so im dumb

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you do just use a tool to compress them

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seems like nvtt is what I should use

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so, my asset-cooker will load image from png/jpg whatever, compress using nvtt then save that to a file

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then I load that up with dds_image

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and throw into an image?

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with the compressed format set

opaque fable Mar 25, 2025, 12:57 AM

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having problems with my cascades

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:/ been stuck trying to fix them for a while now

opaque fable Mar 25, 2025, 2:20 AM

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man

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im so dumb

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i've been accidentally flipping the depth values for my shadows this whole time

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and rendering them as if I'm using reverse-z

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oh

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im still getting weird problems

opaque fable Mar 25, 2025, 3:00 AM

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i give up

opaque fable Mar 26, 2025, 8:56 AM

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all fixed

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thats what I get for making assumptions

opaque fable Mar 27, 2025, 10:47 AM

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working on SSAO today

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need to add in a blur

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it was a lot of pain until I realised I was calculating my fragment positions in world space instead of view space

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but still

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hmm, i my normals are also in world space

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need to fix that

opaque fable Mar 27, 2025, 11:11 AM

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wait

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no they arent lol

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im dumb

opaque fable Mar 27, 2025, 12:26 PM

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man

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i am even dumber

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so

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i couldn't convert my normals to world space from screen space

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(now outputting sceen space normals in gbuffer)

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turns out i was using an unsigned format for my normals which meant anything below 0 didn't work

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very smart i am

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very smart

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oh yeah

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you can see it was broken beforer

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now the back wall is completely white

opaque fable Apr 8, 2025, 3:32 PM

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i got a new job! i start next week

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thats why I been so quiet here

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want to keep up with this but took a backseat to relaxing before starting

slim hull Apr 8, 2025, 4:42 PM

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congratulations 🎉

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is it graphics related?

opaque fable Apr 12, 2025, 10:59 AM

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thanks, it’s not

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continuing as a gameplay programmer, which I’m quite happy to at the moment

upbeat meadow Apr 18, 2025, 9:21 PM

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congratulations indeed 🙂

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you are missing an afps display

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#1019740157798273024 message

#island scene, renderer rewrite from rust (C++, Vulkan)