const xmlns = 'http://www.w3.org/2000/svg';
const grid = document.querySelector('svg .grid');
const frontmost = grid.querySelector('.frontmost');
const hex = {
inradius: 8.66,
circumradius: 10,
}
const horzSpacing = hex.inradius;
const vertSpacing = hex.circumradius * 3 / 2;
function toKey({ q, r, s, t = 0 } = {}) {
return `${[q, r, s, t]}`;
}
function fromKey(key) {
const split = key.split(',');
return { q: +split[0], r: +split[1], s: +split[2], t: +(split[3] || 0) };
}
function sameSigns(a, b) {
return a > -1 && b > -1 || a < 0 && b < 0;
}
function getNeighbors(coords) {
const { q, r, s, t } = fromKey(coords);
return [
toKey({ q: q + 1, r: r, s: s - 1, t }),
toKey({ q: q - 1, r: r, s: s + 1, t }),
toKey({ q: q + 1, r: r - 1, s: s, t }),
toKey({ q: q - 1, r: r + 1, s: s, t }),
toKey({ q: q, r: r + 1, s: s - 1, t }),
toKey({ q: q, r: r - 1, s: s + 1, t }),
]
}
function addHexText(q, r, s, v) {
const qText = document.createElementNS(xmlns, 'text');
qText.textContent = q;
qText.setAttributeNS(null, 'x', -3);
qText.setAttributeNS(null, 'y', -3);
const rText = document.createElementNS(xmlns, 'text');
rText.textContent = r;
rText.setAttributeNS(null, 'x', 5);
rText.setAttributeNS(null, 'y', 1.5);
const sText = document.createElementNS(xmlns, 'text');
sText.textContent = s;
sText.setAttributeNS(null, 'x', -3);
sText.setAttributeNS(null, 'y', 5);
const vText = document.createElementNS(xmlns, 'text');
vText.textContent = v;
vText.style.fill = 'red';
vText.setAttributeNS(null, 'y', 1);
vText.setAttributeNS(null, 'x', -2);
return [qText, rText, sText, vText];
}
function radialToScreenCoords({ q, r, s }) {
let x;
if (q === s)
x = 0;
else if (sameSigns(q, s))
x = Math.abs(q - s);
else
x = Math.abs(q) + Math.abs(s);
x = (q > s ? -1 : 1) * x * horzSpacing;
const y = r * vertSpacing;
return { x, y };
}
function drawHexes(el, list, renderText = false) {
for (const [key, v] of list) {
const { q, r, s, t } = fromKey(key);
const { x, y } = radialToScreenCoords({ q, r, s });
const cell = document.createElementNS(xmlns, 'g');
cell.dataset.q = q;
cell.dataset.r = r;
cell.dataset.s = s;
cell.dataset.t = t;
cell.setAttributeNS(null, 'transform', `translate(${x}, ${y})`);
const use = document.createElementNS(xmlns, 'use');
use.setAttributeNS(null, 'href', '#hex');
cell.appendChild(use);
if (renderText) addHexText(q, r, s, t).forEach(txt => cell.appendChild(txt));
list.set(key, cell);
el.appendChild(cell);
}
}
function translateRadialCoords({ q, r, s }, direction, distance = 1) {
return {
q: q + direction.q * distance,
r: r + direction.r * distance,
s: s + direction.s * distance
};
}
function generateRadialCoords(l, { q, r, s, t = 0 } = {}, { left, top, right, bottom }, offset = false) {
const origin = toKey({ q, r, s, t });
const list = new Map(l);
list.set(origin, t);
let queue = [origin];
while (queue.length > 0) {
const v = queue.shift();
getNeighbors(v).forEach(w => {
const { q: wq, r: wr, s: ws } = fromKey(w);
const rDist = Math.abs(wr - r);
const alternating = rDist % 2;
const dr = (rDist + alternating) / 2;
const dLeft = ['right', 'both'].includes(offset) ? left - alternating : left;
const dRight = ['left', 'both'].includes(offset) ? right - alternating : right;
if ([
!list.has(w),
wr <= bottom + r && wr >= -top + r,
Math.floor((wq - q - ws + s) / 2) <= dLeft,
Math.floor((ws - s - wq + q) / 2) <= dRight,
].every(v => v)) {
list.set(w, dr);
queue.push(w);
}
});
}
return list;
}
function translateCoords(map, translator) {
const translated = new Map();
for (const [key, val] of map) {
const { q, r, s, t } = fromKey(key);
translated.set(toKey(translator({ q, r, s, t })), val);
}
return translated;
}
function range(start, stop, step = 1) {
return Array.from({ length: (stop - start) / step + 1 }, (_, i) => start + i * step);
}
function rotate180(coords) {
return function ({ q, r, s }) {
return {
q: -q + coords.q,
r: -r + coords.r,
s: -s + coords.s,
transform: (x, y) => `rotate(180 ${x}, ${y}) translate(${x}, ${y})`
};
};
}
function elevationClass(el) {
return `elevation-${el === -1 ? 'basement' : el}`;
}
function addElevationClass(element) {
return el => element.classList.add(elevationClass(el));
}
function drawBuildings(buildings, container, { q: pq, r: pr, s: ps }, features) {
return buildings.reduce((acc, building) => {
const buildingContainer = document.createElementNS(xmlns, 'g');
buildingContainer.classList.add(`building`);
buildingContainer.classList.add(building.type);
container.appendChild(buildingContainer);
let buildingGrid = translateCoords(building.grid, building.position);
buildingGrid = translateCoords(buildingGrid, ({ q, r, s }) => ({ q: q + pq, r: r + pr, s: s + ps }));
const buildingTemplate = document.querySelector(`defs #${building.type}`);
const origin = building.position({ q: 0, r: 0, s: 0 });
const { x, y } = radialToScreenCoords({ q: origin.q + pq, r: origin.r + pr, s: origin.s + ps });
const transform = origin.transform || ((x, y) => `translate(${x}, ${y})`);
const buildingStructure = document.createElementNS(xmlns, 'g');
buildingStructure.classList.add('building');
buildingStructure.classList.add(building.type);
buildingStructure.setAttributeNS(null, 'transform', transform(x, y));
const [mapsheet] = container.classList;
document.querySelector(`.buildings .${mapsheet}`).prepend(buildingStructure);
building.elevationLevels.forEach(elevationLevel => {
const hexContainer = document.createElementNS(xmlns, 'g');
hexContainer.classList.add(elevationClass(elevationLevel));
buildingContainer.appendChild(hexContainer);
buildingGrid = translateCoords(buildingGrid, ({ q, r, s }) => ({ q, r, s, t: elevationLevel }));
drawHexes(hexContainer, buildingGrid);
acc = new Map([...acc, ...buildingGrid]);
});
for (let child of buildingTemplate.querySelector('.structure').children) {
const use = document.createElementNS(xmlns, 'use');
use.setAttributeNS(null, 'href', `#${child.id}`);
child.classList.forEach(className => use.classList.add(className));
if (use.classList.contains('floor'))
building.elevationLevels.forEach(addElevationClass(use));
if (use.classList.contains('outer-wall') || use.classList.contains('inner-wall'))
building.elevationLevels.slice(0, -1).forEach(addElevationClass(use));
if (use.classList.contains('windows'))
building.elevationLevels.slice(0, -1).filter(el => el >= 0).forEach(addElevationClass(use));
if (use.classList.contains('exits')) use.classList.add(`elevation-0`);
if ((use.classList.contains('doors') || use.classList.contains('door-edges')) && !use.classList.contains('exits'))
building.elevationLevels.slice(0, -1).forEach(addElevationClass(use));
buildingStructure.appendChild(use);
}
const featuresEl = features && features.querySelector(`.${building.type}`);
for (let child of [...featuresEl.children]) {
if (child.classList.contains('furniture'))
building.elevationLevels.slice(0, -1).forEach(addElevationClass(child));
if (child.classList.contains('stairs'))
building.elevationLevels.forEach(addElevationClass(child));
buildingStructure.appendChild(child);
}
return acc;
}, new Map());
}
function drawMapsheet(placementMarker, mapsheet, position) {
const container = document.createElementNS(xmlns, 'g');
container.classList.add(mapsheet.id);
placementMarker.before(container);
const buildingContainer = document.createElementNS(xmlns, 'g');
buildingContainer.classList.add(mapsheet.id);
document.querySelector('.buildings').appendChild(buildingContainer);
const gridContainer = document.createElementNS(xmlns, 'g');
gridContainer.classList.add('elevation-0');
const buildingHexes = drawBuildings(
mapsheet.buildings,
container,
position,
document.querySelector(`defs .${mapsheet.id}`)
);
const grid = translateCoords(mapsheet.grid, ({ q, r, s }) =>
({ q: q + position.q, r: r + position.r, s: s + position.s })
);
for (const [coords, v] of buildingHexes) grid.delete(coords);
drawHexes(gridContainer, grid);
(mapsheet.features || []).forEach(feature => {
const featureContainer = document.createElementNS(xmlns, 'g');
featureContainer.classList.add('terrain');
const origin = feature.position({ q: 0, r: 0, s: 0 });
const use = document.createElementNS(xmlns, 'use');
const { x, y } = radialToScreenCoords({
q: origin.q + position.q,
r: origin.r + position.r,
s: origin.s + position.s
});
use.setAttributeNS(null, 'href', `#${feature.type}`);
use.setAttributeNS(null, 'x', x);
use.setAttributeNS(null, 'y', y);
featureContainer.appendChild(use)
buildingContainer.appendChild(featureContainer);
});
container.appendChild(gridContainer);
return new Map([...grid, ...buildingHexes]);
}
const horzMapVect = function (coords) {
return vectorAdd(coords, { q: 1, r: 0, s: -1 }, 33);
}
const vertMapVect = function (coords) {
return vectorAdd(coords, { q: 1, r: -2, s: 1 }, 13);
}
function vectorAdd({ q, r, s }, { q: dq, r: dr, s: ds }, scalar) {
return ({ q: q + dq * scalar, r: r + dr * scalar, s: s + ds * scalar });
}
function findMult(arr) {
if (arr.length % 2)
return arr.map((v, index) => {
const row = v.length % 2
? v.map((rv, rindex) => [Math.floor(rindex - v.length / 2) + 1, rv])
: v.map((rv, rindex) => [Math.floor(rindex - v.length / 2), rv]).map(([rm, rv]) => [rm > -1 ? rm + 1 : rm, rv]);
return [Math.floor(index - arr.length / 2) + 1, row];
});
else
return arr.map((v, index) => {
const row = v.length % 2
? v.map((rv, rindex) => [Math.floor(rindex - v.length / 2) + 1, rv])
: v.map((rv, rindex) => [Math.floor(rindex - v.length / 2), rv]).map(([rm, rv]) => [rm > -1 ? rm + 1 : rm, rv]);
return [Math.floor(index - arr.length / 2), row];
}).map(([m, v]) => [m > -1 ? m + 1 : m, v]);
}
function findScalar(arr, width, height) {
let pos;
let neg;
if (arr.length % 2) {
pos = -height;
neg = -height;
} else {
const vert = Math.floor(height / 2);
pos = -vert - height % 2;
neg = -vert;
}
return arr.map(([mult, v]) => {
let hpos, hneg;
if (v.length % 2) {
hpos = width;
hneg = width;
} else {
const horz = Math.floor(width / 2);
hpos = horz;
hneg = horz + width % 2;
}
const row = v.map(([hmult, hv]) => [hmult < 0 ? hmult * hneg : hmult * hpos, hv]);
return [mult < 0 ? mult * neg : mult * pos, row];
});
}
let sheets = [];
const mapsheetsContainer = document.querySelector('.grid .mapsheets');
let { width, height } = mapsheetsContainer.dataset;
width = width ? +width - 1 : 33;
height = height ? +height : 13;
const mapRect = {
left: width ? Math.floor(+width / 2) : 17,
right: width ? Math.floor(+width / 2) + +width % 2 : 17,
top: height ? height - 1: 13,
bottom: height ? height : 14
};
const msGrps = [...document.querySelectorAll('.grid .mapsheets > *')].map(g =>
[...g.querySelectorAll('[class^="mapsheet"]')]
);
sheets = msGrps.map(msG => {
return msG.map(mapsheetEl => {
const mapsheetDef = document.querySelector(`defs #${mapsheetEl.getAttributeNS(null, 'class')}`);
const buildings = mapsheetDef.children;
const offset = height % 2 ? 'left' : 'right';
const mapsheet = {
id: mapsheetDef.id,
grid: generateRadialCoords(new Map(), { q: 0, r: 0, s: 0 }, mapRect, offset),
buildings: [...buildings].map(bld => {
const bldId = bld.getAttributeNS(null, 'class');
const bldDef = document.querySelector(`defs #${bldId}`);
// Map-specific footprint definition override
const footprint = bld.querySelector('.footprint') ? bld.querySelectorAll('.footprint g') : bldDef.querySelectorAll('.footprint g');
const grid = [...footprint].reduce((acc, coordEl) => {
acc = generateRadialCoords(acc, toRad(coordEl.dataset), toRect(coordEl.dataset), coordEl.dataset.offset);
return acc;
}, new Map());
const { q: dq, r: dr, s: ds } = toRad(bld.dataset);
let position;
if (bld.dataset.rotate)
position = rotate180({ q: +dq, r: +dr, s: +ds });
else if (bld.dataset.transform)
position = ({ q, r, s }) => ({
q: q + +dq,
r: r + +dr,
s: s + +ds,
transform: (x, y) => `translate(${x + horzSpacing}, ${y})`
})
else
position = ({ q, r, s }) => ({ q: q + +dq, r: r + +dr, s: s + +ds });
return {
type: bld.getAttributeNS(null, 'class'),
elevationLevels: bld.dataset.el ? range(...bld.dataset.el?.split(',').map(n => +n)) : range(0, 1),
grid: grid,
position: position
}
})
}
return mapsheet;
});
});
document.querySelectorAll('use[href^="#building"]').forEach(el => el.remove());
let finalGrid = new Map();
findScalar(findMult(sheets), +width + 1, +height).forEach(([vscalar, row]) => {
const vertMapVect = function (coords) {
return vectorAdd(coords, { q: 1, r: -2, s: 1 }, vscalar);
}
row.forEach(([hscalar, ms]) => {
const horzMapVect = function (coords) {
return vectorAdd(coords, { q: -1, r: 0, s: 1 }, hscalar);
}
ms = drawMapsheet(frontmost, ms, horzMapVect(vertMapVect({ q: 0, r: 0, s: 0 })));
finalGrid = new Map([...finalGrid, ...ms]);
})
});
document.querySelector('.grid .mapsheets').remove();
function addGroup(container, className) {
const g = document.createElementNS(xmlns, 'g');
g.classList.add(className);
container.appendChild(g);
return g;
}
function toRect({ left, right, top, bottom }) {
return { left: +left, right: +right, top: +top, bottom: +bottom };
}
function toRad({ q, r, s }) {
return { q: +q, r: +r, s: +s };
}