Uniforms Uniforms are another way to pass data from our application on the CPU to the shaders on the GPU — 1. uniforms are global. Global, meaning that a uniform variable is unique per shader program object, and can be accessed from any shader at any stage in the shader program 2. uniforms will keep their values until they're either reset or updated

1

15

Shaders & GLSL

notes + algo + examples + experiments

programming

#CS

#openGl

shaders

creative coding

Get

Explore more quotes

Shaders are also very isolated programs in that they're not allowed to communicate with each other; the only communication they have is via their inputs and outputs.

Tony Nemo

Shaders always begin with a version declaration, followed by a list of input and output variables, uniforms and its main function. Each shader's entry point is at its main function where we process any input variables and output the results in its output variables

Tony Nemo

Email:thur antony@gmail com128723 1pk4hyr.fwlc6av2t9

Tony Nemo

Tony Nemo

GLSL Vector Container A vector in GLSL is a 1,2,3 or 4 component container for any of the basic types just mentioned. They can take the following form (n represents the number of components)

Tony Nemo

Components of a vector can be accessed via vec.xwhere x is the first component of the vector. You can use .x, .y, .z and .w to access their first, second, third and fourth component respectively. GLSL also allows you to use rgba for colors or stpq for texture coordinates, accessing the same components.

Tony Nemo

Email:thur antony@gmail com128723 1efbv6w.aoh97ctyb9

The vector datatype allows for some interesting and flexible component selection called swizzling. Swizzling allows for the following syntax:

Tony Nemo

Email:thur antony@gmail com128723 ld2zcw.nfdme1m7vi

We can also pass vectors as arguments to different vector constructor calls, reducing the number of arguments required:

Tony Nemo

ins and outs Shaders are nice little programs on their own, but they are part of a whole and for that reason we want to have inputs and outputs on the individual shaders so that we can move stuff around. GLSL defined the in and out keywords specifically for that purpose.

Tony Nemo

ins and outs 2 Each shader can specify inputs and outputs using those keywords and wherever an output variable matches with an input variable of the next shader stage they're passed along. The vertex and fragment shader differ a bit though

Tony Nemo

If we want to send data from one shader to the other we'd have to declare an output in the sending shader and a similar input in the receiving shader. When the types and the names are equal on both sides OpenGL will link those variables together and then it is possible to send data between shaders

Tony Nemo

Email:thur antony@gmail com128723 1ozbhf5.02a1qbyb9

To declare a uniform in GLSL we simply add the uniform keyword to a shader with a type and a name. From that point on we can use the newly declared uniform in the shader. Let's see if this time we can set the color of the triangle via a uniform

Tony Nemo

If you declare a uniform that isn't used anywhere in your GLSL code the compiler will silently remove the variable from the compiled version which is the cause for several frustrating errors; keep this in mind!

attention

Tony Nemo

Your determination, selflessness and courage have brought the freedom struggle towards its fulfillment.

Gerry Adams

That's the staggering, humorous thing about money. If you haven't got taste, money doesn't matter: You'll always look ghastly.

Joanna Lumley

When trouble ends even troubles please.

Sophocles

I definitely think anything I'd be in now is a permanent relationship.

Kim Kardashian

Life isn't a 24/7 merry go round. If it were, you wouldn't get the 7 hours of sleep necessary to keep you fit and sane.

Jacqueline Leo

I just did a part in 'Sin City 2.' I got to do a scene with Ray Liotta. Amazing man, extraordinary gentleman who was just so kind to me... I'm so excited about that; I think it's gonna be very cool.

Juno Temple

My friend Anderson Cooper is the scion of one of America's great shipping and railroad families, the Vanderbilts.

Kathy Griffin

If you'd rather live surrounded by pristine objects than by the traces of happy memories, stay focused on tangible things. Otherwise, stop fixating on stuff you can touch and start caring about stuff that touches you.

Martha Beck

Acting and modelling are good, but motherhood is what it's all about.

Jerry Hall

I used to think that driving, sleepless, ambitious labor was what you needed to succeed.

Charles Kuralt

There's a vintage which comes with age and experience.

Jon Bon Jovi

In terms of negotiating a career - I've always grown up being an insider and an outsider to different worlds, across different classes and cultures, so I have always naturally liked making films or music that puts things in unexpected places.

Riz Ahmed

If you are a nurturing mother, and a good one, you can go to play groups, sit on the floor and play all the games, and have tea with the other mothers, but wouldn't you like to think that's not all there is? That you haven't hung up your high heels without knowing how to walk in them?

Tori Amos

Gospel artists are messengers; they are vessels of a message.

Boris Kodjoe

I like trying different foods. I've done vegetarian stuff, and I've gone through meat phases, and then I do no bread, and then I eat bread. I'm really all over the place in the way a lot of actors are.

Parker Posey

I guess I'm too outspoken.

Sharon Tate

I honestly think if I would've tied my suit and there wouldn't have been any water rushing through it, I think I could've gone at least a second faster.

Ryan Lochte

As long as the problem of world reconstruction remains the center of interest for all nations, blocs having similar attitudes will form and operate even within the League itself.

Hjalmar Branting

If I can bring joy into the world, if I can get people to stop thinking about their pain for a moment, or the fact the tomorrow morning they're going to get up and tell their boss off... then I'll be successful.

Bobby McFerrin

I read all of the books by Tolkien, including 'The Hobbit,' when I was in my twenties, and his deep love of nature and all things green resonates deeply with me.

Howard Shore

The enemies are not so much from without as from within the race.

Marcus Garvey

My father had a dairy farm. He employed three black families and one white family, and I used to play with black children.

Billy Graham

In all the music that deals with experimental repetition, drum and bass, dub, various kinds of house music, there's always been a quality of atmosphere and ambience.

Bill Laswell

Everybody knows about Peter Jackson, 'The Hobbit' movies and 'The Lord of the Rings' films being made in New Zealand, and to actually have been part of it for such a long period, to live there and to have friends that I will have for life because of that experience, is an amazing thing.

Luke Evans