Hexagon Map: How do you compute the total size in pixels?

TJ_Redleg · January 18, 2017, 12:32pm

I use a spreadsheet to figure this out but my calculations are different than Tileds.

What’s the formula for computing the total pixel size height and width of a hexagon map?

Thanks.

bjorn · January 18, 2017, 9:17pm

The best reference may be the source code:

bjorn/tiled/blob/master/src/libtiled/hexagonalrenderer.cpp#L67-L89


{
const RenderParams p(map());


QRect mapBounds;


if (map()->infinite()) {
    LayerIterator iterator(map());
    while (Layer *layer = iterator.next()) {
        if (TileLayer *tileLayer = dynamic_cast<TileLayer*>(layer))
            mapBounds = mapBounds.united(tileLayer->bounds());
    }


    if (mapBounds.size() == QSize(0, 0))
        mapBounds.setSize(QSize(1, 1));
} else {
    mapBounds = QRect(0, 0, map()->width(), map()->height());
}


// The map size is the same regardless of which indexes are shifted.
if (p.staggerX) {

This file has been truncated. show original

The RenderParams class is a small helper class that computes the columnWidth and rowHeight from the map parameters (if you follow the link, you can scroll a bit up to see this class).

To get at these calculations I basically just drew the hex grid on a piece of paper and determined the width/height added by each column/row of tiles, plus any extra space due to the staggering (only when stagger axis is longer than one tile) and hex shape.

TJ_Redleg · January 19, 2017, 7:34am

Thanks this is helpful.

Topic		Replies	Views
Beginner Q: Hexa tiles look strange, overlap, should I start with Documentation? Questions	3	1026	May 29, 2018
Hexagonal maps: Default Tile Side to value other than zero Suggestions	2	1418	February 2, 2016
How to make a hexagonal tileset? Questions	3	1445	March 3, 2023
Issue with hexagonal map Questions	4	739	July 12, 2022
How to change grid Questions	2	519	March 3, 2020

Hexagon Map: How do you compute the total size in pixels?

Related Topics