Disabling screen plates in an isometric engine

Question

For a university project, I am working on a graphic roguelike (I know the contradiction in terms: P), which uses an isometric display. What I'm trying to understand is that since all the tiles look stupidly expensive and unnecessary, I want to find a relatively quick algorithm to determine which tiles should be drawn to fit into the NxMpx window, given that the XxYpx graphics tile .

I am not doing a smooth scroll for this, so this is not a problem. I also do not worry about being perfect - a small unnecessary draw is beautiful, I just do not want to draw a huge amount of unnecessary plates that will not appear in the game.

Answer 1

You need to think about two concepts: screen space and world space. This is very important in 3D engines, but they apply to all but the simplest games. In an isometric engine, your world space is a 2-dimensional array of tiles.

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