It kinda reminds me how DJ got his dungeon map generated, which was about generating map based on a "minimap" he stored in the Picture file.
But I wonder how fast will that mode 7 thingy be with TI-BASIC O.o

I think it's probably more like wireframe 3d than mode7. I suppose it could be faster than mode7 because it doesn't have to loop through each pixel on the screen, but it does look rather lonely

It kinda reminds me how DJ got his dungeon map generated, which was about generating map based on a "minimap" he stored in the Picture file.
But I wonder how fast will that mode 7 thingy be with TI-BASIC O.o

It was 2D, though, and didn't use lines.

However a racing game attempted a similar method in the past I think, or maybe it was a different one, but it still drew tracks with lines. It had slopes, though: 

http://www.ticalc.org/archives/files/fileinfo/126/12690.html

It didn't support clipped lines, though (as you can see, it doesn't use the entire screen)

Though, it's not like my mode7 engine is super slow, either. The current version of it gets about 19 frames per second at the 15MHz speed (and the framerate stays pretty constant -- the line drawing method's speed could vary greatly with the number of lines that are onscreen)

Edit: Of course, not to discourage trying this method at all.

How would collision detection work, by the way?

@Calc84maniac that's in ASM, though, right?

Well, I actually translate pixel coordinates into world coordinates for the mode7 renderer, not the other way around. However, I do occasionally have to translate world coordinates into pixel coordinates, in the case of the movable sprite objects. Basically, I get the relative offset from the camera by subtracting the camera coordinates and then rotating that offset by the camera angle (which requires some multiplications by the cosine and sine of the camera angle). Then I calculate the pixel row and column by using some division and stuff.

Haha yeah, I just don't want to get the exact calculations unless it's really necessary, because I don't feel like deciphering my old code