I'm having trouble with translating tile coordinates from 2D table to screen X,Y values.
Table I have represents a dungeon, like in a roguelike game. It has regular Map[rows][columns] structure, with each field representing either floor tile, a wall, or something else.
I'm using diamond-shaped tiles for the floor. Everything else will have diamond-shape base, too.
Algorithm I'm currently using looks like this:
Code: Select all
function map_to_iso(field, tile_width, tile_height)
x = (field.x - field.y) * tile_width/2;
y = (field.x + field.y) * tile_height/2;
return x,y
end
Code is problematic, because very often column of a field is less than it's row, resulting in negative x value. It gives me borked results, like here: https://i.imgsafe.org/f72daf08c3.png
If I add some large value to every x, functionally moving everything to the right, then I get proper results, but I also get huge void with a little map in the middle. I also encounter lots of translation problems when it comes to making it work with Gamera lib. Essentialy I can't move it around to focus on proper place.
How do I tackle those problems?
Thanks in advance for help!
