varying variables

[addlistener]

Where in the question body did you find vTop, vLeft, vRight variables? There's no code about it in vertex.glsl....

[drewlustro]

which challenge are you referring to?

[addlistener]

Challenge "Varying variables"

[drewlustro]

I honestly have no idea; I answered about half of these questions nearly 2 years ago. Some of the answers were produced with much internet googling and frustration.

I even filed an Issue with the shader-school repository maintainers about the lack of sufficient information & clues to answer some of the problems.

stackgl/shader-school#106

Unless they've vastly updated the project, I suspect there are still such problems with shader-school.

Generally speaking though, I cannot complain because it was an excellent introduction to shaders. Once you get to the questions on lighting models though, everything really falls apart.

[idchlife]

Lol I tried like dividing different axis to colors .r .g .b to get the answer done.

How one suppose to find that coordinates are 100.0?! I thought they will be like 1.0 max since rgb is 0.0 - 1.0
And that's just a scratch of a mountain.

So vLeft, vTop etc must be set for exercise to process them so color can be set behind the scenes accordingly, yes? Dear god. I thought I'm stupid for not getting how to get colors right.

Are there better interactive tutorials about shaders out there?

[WWRS]

Better way of figuring that one out:

if (position.y > 0.0) {
  // Top
} else if (position.x > 0.0) {
  // Right
} else {
  // Left
}