the name doesn't matter either, as long as its an `out` you could name it `out myStupidVariable` and

the name doesn't matter either, as long as its an

out

out

you could name it

out myStupidVariable

out myStupidVariable

out myStupidVariable

out myStupidVariable and it would still work

fornite•4/3/23, 12:24 PM

in vec3 myInputtedColor

out vec3 myOutputtedColor

void main() {
  myOutputtedColor = myInputtedColor
}

in vec3 myInputtedColor

out vec3 myOutputtedColor

void main() {
  myOutputtedColor = myInputtedColor
}

AAqua the name doesn't matter either, as long as its an `out` you could name it `out m...

fornite•4/3/23, 12:25 PM

ohh

fornite•4/3/23, 12:25 PM

but how does it know that variable is for the color and not something else

Ffornite ```glsl in vec3 myInputtedColor out vec3 myOutputtedColor void main() { myO...

fornite•4/3/23, 12:25 PM

would this be how i would need to externally control a color in the shader?

Ffornite ```glsl in vec3 myInputtedColor out vec3 myOutputtedColor void main() { myO...

AquaOP•4/3/23, 12:25 PM

yep, the inin value in this case would come from the vertex shader
so you'd define vertex colors in your vertex buffer, set up the attribs, and then set this value in the vertex shader

AquaOP•4/3/23, 12:26 PM

based on what you're trying to do though it could be done with a

uniform

uniform

but vertex colors is what i'd advise doing

Ffornite but how does it know that variable is for the color and not something else

AquaOP•4/3/23, 12:26 PM

out

out

variables in fragment shaders are always for color

AAqua based on what you're trying to do though it could be done with a `uniform` but v...

fornite•4/3/23, 12:26 PM

oh yeah im reading about those right now

fornite•4/3/23, 12:26 PM

is this right

fornite•4/3/23, 12:27 PM

so this would output my color which i input from my c# externally

AquaOP•4/3/23, 12:28 PM

that would work sure
just remember this only works if you do separate draw calls, uniforms have the same value throughout the draw call
this is why i'd advise using vertex colors, it allows you to change them even while still using one draw call

AAqua that would work sure just remember this only works if you do separate draw calls...

fornite•4/3/23, 12:28 PM

yeah im doing separate draw calls

AquaOP•4/3/23, 12:28 PM

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

the name doesn't matter either, as long as its an `out` you could name it `out myStupidVariable` and

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