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terminology: draw vs render. is this correct?

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Ive always used the terms draw and render interchangeably. Do they mean the same thing? Suppose I want to describe the situation where, you send a bunch of polygons (say 100) to OPENGL, but for various reasons*, only some of them (say 30) are drawn to the screen. Is this the difference? Is it correct to say that 100 polygons were rendered, but only 30 were drawn? * various reasons may be : some of the polys are behind the view point, some of the polys are behind other polys, some of the polys are exactly perpendicular to the viewer... etc [edited by - AndreTheGiant on March 17, 2004 5:35:18 PM]

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I guess you could say that rendering is the whole process of transforming and lighting vertices, processing fragments, and filling in all necessary buffers, whereas drawing is only the last step.

Kind of picky, though.

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Nice one duke, I like it.

There is a difference though (in my opinion). Drawing is like saying to OpenGL - "this is where I want to put these pixels" - a bit like setting aside positions for the pixels. Rendering is then taking those pixels and putting them on the screen.

A bit like in a 3D modeling program. You make the model normally (drawing), and then you render it (rendering).

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i moved away from draw all in all.

if i rastericing, i call it paint (the painters algorithm is used for it, at least:D (or, "how to ''draw'' transparent surfaces").

for raytracing, i call it capturing.

and rendering, for me, got more general as "processing the input to get the output we want". so if i take a cd, and rip off the wave, and create an ogg, technically, i _could_ say i render it as ogg into a file.

i don''t, normally. :D

but painting, and capturing, fits bether than drawing imho.




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