my sprite renderer passes through a bunch of vertex parameters, including stuff like rotation info

my sprite renderer passes through a bunch of vertex parameters, including stuff like rotation information. because of this I can draw up to 16384 sprites in a single draw call

fornite•4/3/23, 12:29 PM

maybe one day ill figure out how to do all this in one draw call but im gonna stick to this for now cus it works

AAqua my sprite renderer passes through a *bunch* of vertex parameters, including stuf...

fornite•4/3/23, 12:29 PM

im still confused though

fornite•4/3/23, 12:29 PM

so the fragment shader

fornite•4/3/23, 12:29 PM

sets the color of every individual pixel

fornite•4/3/23, 12:29 PM

i get that

fornite•4/3/23, 12:29 PM

but the vertex shader

fornite•4/3/23, 12:29 PM

sets the color of the vertices?

fornite•4/3/23, 12:30 PM

a vertice is just a corner though

AquaOP•4/3/23, 12:30 PM

the vertex shader determines what position on the screen each vertex is

Linx145•4/3/23, 12:30 PM

only 16384? pfft

AquaOP•4/3/23, 12:31 PM

it's an arbitrary limit i manually set

AquaOP•4/3/23, 12:31 PM

my engine is a 3D engine so there's no need to waste GPU memory for a bunch of sprites that will never be drawn

AAqua the vertex shader determines what position on the screen each vertex is

AquaOP•4/3/23, 12:32 PM

basically
vertex shader = position
fragment shader = color

fornite•4/3/23, 12:33 PM

OH MY GOD

fornite•4/3/23, 12:33 PM

IM SO HAPPY

fornite•4/3/23, 12:33 PM

I DID IT

fornite•4/3/23, 12:33 PM

I CAN DRAW MULTIPLE SHAPES AND I CAN HAVE THEM BE DIFFERENT COLORS

fornite•4/3/23, 12:34 PM

i simplified like 270 lines of code into like 15 lines of code

fornite•4/3/23, 12:34 PM

fornite•4/3/23, 12:34 PM

fornite•4/3/23, 12:34 PM

ive never been more happy to see some basic shapes on my screen

fornite•4/3/23, 12:35 PM

ive also made a thing for the coordinate system to be in pixels instead of floats

fornite•4/3/23, 12:35 PM

and instead of coming from the middle

fornite•4/3/23, 12:35 PM

the coordinate system comes from the top left and increases towards the bottom right

fornite•4/3/23, 12:36 PM

like most game engines have it cus im used to that

AquaOP•4/3/23, 12:36 PM

your life will be a lot easier once you get to transformations in the learnopengl tutorial

AAqua your life will be a lot easier once you get to transformations in the learnopeng...

fornite•4/3/23, 12:38 PM

i will definitely read about that

fornite•4/3/23, 12:47 PM

do i even wanna know how to draw a circle

AquaOP•4/3/23, 12:49 PM

circles are a lot harder. you either have to draw lots of small triangles, draw a circle texture, or do what I do which is to use an SDF which is a whole nother thing entirely

AAqua circles are a lot harder. you either have to draw lots of small triangles, draw ...

fornite•4/3/23, 12:51 PM

could i make a program that basically creates an empty array and then goes along bit by bit by the circumference of the circle until it makes a full circle and comes back to the start

fornite•4/3/23, 12:51 PM

and with each iteration it stores that coordinate into the array and then uses that as a buffer

AquaOP•4/3/23, 12:52 PM

you have to make sure it creates triangles

AquaOP•4/3/23, 12:52 PM

generally for that i'd use a triangulation algorithm. but i don't know, i never even bothered doing that, I just use SDFs

AquaOP•4/3/23, 12:52 PM

the easiest thing to do though is almost certainly going to be to create a texture CPU side and then draw it

AquaOP•4/3/23, 12:52 PM

won't be particularly fast but the other two ways are vastly more complicated

fornite•4/3/23, 12:56 PM

ah shit

fornite•4/3/23, 12:56 PM

on that note

fornite•4/3/23, 12:56 PM

moving on to drawing textures

AquaOP•4/3/23, 12:57 PM

https://github.com/skyebird189/Silk.NET/blob/samples-textures/examples/CSharp/OpenGL%20Tutorials/Tutorial%201.3%20-%20Textures/Program.cs take a look at my fork, I've written a texture tutorial that doesn't use the GL abstractions

AAqua <https://github.com/skyebird189/Silk.NET/blob/samples-textures/examples/CSharp/O...

fornite•4/3/23, 12:59 PM

theres a way to use gl abstractions????

fornite•4/3/23, 12:59 PM

AquaOP•4/3/23, 1:00 PM

well yes
i myself have written an abstraction layer over both GL and directx, but that is separate to these tutorials
but all the abstractions in these tutorials do is reduce some of the boilerplate, you still have to write the GL stuff yourself

fornite•4/3/23, 1:02 PM

so what should i do

fornite•4/3/23, 1:02 PM

with or without abstractions

AquaOP•4/3/23, 1:03 PM

i've adjusted the tutorials so it teaches you textures first and then does the abstractions and that's the way i'd personally advise learning it

fornite•4/3/23, 1:03 PM

wait

fornite•4/3/23, 1:04 PM

textures

fornite•4/3/23, 1:04 PM

also need a vbo and ebo and all that?

AquaOP•4/3/23, 1:04 PM

my sprite renderer passes through a bunch of vertex parameters, including stuff like rotation info

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