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.
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I go into it with the attitude that I'm not going to look at my leg, and as soon as they get the wrapping off of it, I'm like, 'I've got to look.' It's like yelling at a dog going, 'Squirrel!' I cannot not look. And then I spend the rest of the time sitting there with a wet washcloth on my forehead trying to regain consciousness.
Money and prices and markets don't give us exact information about how much our suburbs, freeways, and spandex cost. Instead, everything else is giving us accurate information: our beleaguered air and watersheds, our overworked soils, our decimated inner cities. All of these provide information our prices should be giving us but do not.
As a child, I had no interest in science whatsoever - then I started writing and recognized how relevant it was. My first book about science and medicine captured the world of organ transplantation in 1989 from the points of view of all of the participants - scientists, surgeons, social workers, organ recipients and even donor families.