I've read a couple of tutorials about what OpenGL is and how OpenGL works in code, but I simply don't get how you use it just like you use the canvas.
In all the tutorials they showed me that OpenGL is capable of drawing what ever object I want, but always with the examples of vertices like "1.0f, 1.0f, 0.0f", "-1.0f, -1.0f, 0.0f" and "0.0f, 0.0f, 0.0f". I assume the floats are representing pixels, means my my vertices are on A (1px/1px/0px), B (0px/0px/0px) and C (-1px,-1px,-1px). So if I view my new triangle from the near (e.g. 0/0/-10), then I can see it. If I view it from the far (e.g. 0/0/-500), then I do not see it, because it's simply only a few px² big. Am I right?
If I'm right, all these floats stand for pixels. Means If I view my OpenGL-Surface from far enough, I could see the screen and its' pixels in the original size, couldn't I? How do I determine the distance then, which I would have to set in the "GLU.gluLookAT(GL, x, y, DISTANCE, ...)"? And how can I move the coordinate plane to the top-left corner, or better bottom-left corner, of my screen?
Incase I'd be able to do that, I'd have my view point (GLU.gluLookAt(...)) at x=screen_width / 2, y=screen_height / 2 and z=?. In that case, wouldn't I see the object that is directly "under" me just in the dimensions as it is, and all the other objects (e.g. on x=0, y=0, z=0 OR x=screen_width, y=screen_height, z=0) from some other direction? I mean, wouldn't I see them deformed / shaped in another way?
I just want to use OpenGL, because it is faster and because I want to learn handling with it, but I want to have the same view on my objects, like I have on the canvas.
THanks in advance!
