GLSL types — GLSL has most of the default basic types we know from languages like C: int, float, double, uint and bool. GLSL also features two container types that we'll be using a lot throughout the tutorials, namely vectors and matrices. 

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.

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

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)

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.

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

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

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.

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

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

Uniforms Uniforms are another way to pass data from our application on the CPU to the shaders on the GPU

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

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!

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Television has a different biorhythm than movies. I love the biorhythm of TV.

There is no question that knowing someone in the business will get you in the door. But it is your skill that will keep you in the room.

In terms of filming, yes, it really does feel over now. There's a real sense of freedom now. It's a good time to finish, I think. As much as I'm going to miss it I'm ready to move on and do different things.

Theater will always be a huge part of my life. The high I get from doing theater is not, quite honestly, matched by many things. I like the fact that when you step out on the stage, for that given night, for better or for worse, you are the master of the boards. I love it to death.

The more consciously democratic Americans became, however, the less they were satisfied with a conception of the Promised Land, which went no farther than a pervasive economic prosperity guaranteed by free institutions.

The dads across the soccer field looked at me as a dad just like them. And I was very grateful.

The only honest and generous thing for me to do is to give people myself. That's all I've got as an artist, so I want to do that in an unflinching way.

I think the best directors provide you with a safe environment where they can instill you with confidence and allow you to try things out and not feel like you're failing or that you're doing it wrong.

The thing about parenting rules is there aren't any. That's what makes it so difficult.

We shall defend our island, whatever the cost may be, we shall fight on the beaches, we shall fight on the landing grounds, we shall fight in the fields and in the streets, we shall fight in the hills; we shall never surrender.

Who among us is so certain of our identity? Who hasn't been asked, 'What's your background?' and hesitated, even for a split second, to answer their inquisitor. Howard Jacobson's 'The Finkler Question' forces us to ask that of ourselves, and that's why it's a must read, no matter what your background.

My plays are always pushing towards cinema anyway. They're down and dirty, real and more fun.

All progress is initiated by challenging current conceptions, and executed by supplanting existing institutions.

As a songwriter, I do kind of look at 'Santa Monica' as a thing outside of itself, because it isn't just my song. This is a song a lot of people tell me is a part of their high school or college years. That means a lot to me.

My mom and dad are both in stand-up comedy, so that's where I started, that's where I got everything. My roots are holding the mic.

Art for Duchamp, all the arts, obey the same law: meta-irony is inherent in their very spirit. It is an irony that destroys its own negation and, hence, returns in the affirmative.

If you don't learn from your mistakes, then they become regrets.

There are so many roles on TV that I don't covet. I see them, and I'm glad I don't have to play them.

The reason that you dance and sing is to make the audience feel like they're dancing and singing. As long as you're having fun with it and giving it 100 percent, they're gonna feel that.

I don't go to any of the big Academy parties while the show is on because, invariably, it turns to people watching me watch the host, and it's not comfortable. I watch at home and hope the show gets to be really good.

I was so fanatical about trying to save wildlife... I was unable to accept that we couldn't solve this problem of thousands of years, of wherever humans operated, the environment deteriorated.

Marc by Marc Jacobs was my favorite. The stage was so big, and there were so many people there. I had very bad vision during the show because I forgot to put in my contacts, but I didn't fall or anything.

I wish I was told to look after my teeth when I was younger. My smile is really important to me and one of my biggest assets, so I'm very conscious that I need to keep it in top condition.

I think people who go out and tell you how much they're gonna change things are the people who end up being just another whatever. I'm never trying to change anything. That's not for me.