Java Community | Help. Code. Learn.•2mo ago

isometric tile setup

i have a 2D array of tiles, and each tile is 32x32 pixels.

public void toIso(){
        int newX = x+y;
        int newY = (int) (0.5*(y-x));

        x = newX;
        y = newY;
    }

public void toIso(){
        int newX = x+y;
        int newY = (int) (0.5*(y-x));

        x = newX;
        y = newY;
    }

im using this function to convert a normal 2d grid to an isometric view but im not getting an unform grid in return. (0,0 is the top left)

11 Replies

JavaBot•2mo ago

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asdru•2mo ago

this is en example tile texture

tjoener•2mo ago

those cubes don't look isometric the angles aren't 45 degrees So if you're trying stuff based on isometric measurements it won't work plus because you're overlapping you need to get your drawing order right

asdru•2mo ago

adjusting the position made it work

tjoener•2mo ago

Cute though 🙂 Always liked the voxelly pastel look

asdru•2mo ago

public void toIso(){
        int screenWidth = GamePanel.instance.getScreenWidth();
        int screenHeight = GamePanel.instance.getScreenHeight();
        
        int newX = (int) ((x-y)*0.66)+screenWidth/2;
        int newY = (int) ((x+y)*0.33)+screenHeight/3;
        x = newX;
        y = newY;
    }

public void toIso(){
        int screenWidth = GamePanel.instance.getScreenWidth();
        int screenHeight = GamePanel.instance.getScreenHeight();
        
        int newX = (int) ((x-y)*0.66)+screenWidth/2;
        int newY = (int) ((x+y)*0.33)+screenHeight/3;
        x = newX;
        y = newY;
    }

this is the new function but as u can see from the image the tiles arent perfectly aligned due to float multiplication. so instead of getting 48 i get 47 for example. is there a way to get the right value? thanks :)

tjoener•2mo ago

yeah, don't just truncate but round should help quite a bit Also GamePanel.instance...

asdru•2mo ago

yeah i know its bad practise it helped but its still not perfect 😩 since its a 32x32 tile is it better to just write a function to round numbers up to the closest multiple of 32?

tjoener•2mo ago

then you won't have smooth scrolling you're doing everything using floating point numbers of course you will have rounding issues also I don't get why you're modifying your x and y Just have a draw function that holds the grid coordinates and make the draw function convert them to screen coordinates This function has too many levels of abstraction

Kyo-chan•2mo ago

Compute the coordinates of only one tile using the formula you want. All other tile positions, compute them by number of times a tile's width and length

JavaBot•2mo ago

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isometric tile setup