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1210 lines (820 loc) · 29.5 KB
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<title>Track Editor</title>
<style>
* { box-sizing: border-box; }
body { margin: 0; overflow: hidden; background: #000; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; }
canvas { display: block; touch-action: none; }
#toolbar {
position: absolute;
bottom: 20px;
left: 50%;
transform: translateX(-50%);
display: flex;
align-items: center;
gap: 6px;
padding: 8px 10px;
background: rgba(20, 20, 30, 0.85);
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
border-radius: 14px;
border: 1px solid rgba(255, 255, 255, 0.1);
box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
z-index: 10;
}
#toolbar button {
padding: 8px 16px;
border: none;
border-radius: 8px;
background: transparent;
color: rgba(255, 255, 255, 0.65);
font-size: 13px;
font-weight: 500;
cursor: pointer;
transition: all 0.15s;
white-space: nowrap;
}
#toolbar button:hover {
background: rgba(255, 255, 255, 0.1);
color: #fff;
}
#toolbar button.active {
background: rgba(255, 255, 255, 0.18);
color: #fff;
}
.separator {
width: 1px;
height: 24px;
background: rgba(255, 255, 255, 0.15);
margin: 0 2px;
flex-shrink: 0;
}
#toolbar button.action {
background: rgba(80, 180, 80, 0.25);
color: rgba(140, 255, 140, 0.9);
}
#toolbar button.action:hover {
background: rgba(80, 180, 80, 0.4);
color: #fff;
}
#toolbar button.danger {
color: rgba(255, 255, 255, 0.45);
}
#toolbar button.danger:hover {
background: rgba(220, 80, 80, 0.25);
color: rgba(255, 140, 140, 0.9);
}
#toast {
position: absolute;
bottom: 90px;
left: 50%;
transform: translateX(-50%);
padding: 10px 24px;
background: rgba(20, 20, 30, 0.85);
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
color: #fff;
border-radius: 10px;
border: 1px solid rgba(255, 255, 255, 0.1);
font-size: 13px;
opacity: 0;
transition: opacity 0.3s;
pointer-events: none;
z-index: 20;
}
#toast.show { opacity: 1; }
</style>
<script type="importmap">
{
"imports": {
"three": "https://cdn.jsdelivr.net/npm/three@0.183.2/build/three.module.js",
"three/addons/": "https://cdn.jsdelivr.net/npm/three@0.183.2/examples/jsm/"
}
}
</script>
</head>
<body>
<div id="toolbar">
<button id="btn-road" class="active">Road</button>
<button id="btn-erase">Erase</button>
<div class="separator"></div>
<button id="btn-play" class="action">Play</button>
<button id="btn-share" class="action">Share</button>
<div class="separator"></div>
<button id="btn-clear" class="danger">Clear</button>
</div>
<div id="toast"></div>
<script type="module">
import * as THREE from 'three';
import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
import { ORIENT_DEG, CELL_RAW, GRID_SCALE, encodeCells, decodeCells } from './js/Track.js';
// ─── Auto-tile lookup ─────────────────────────────────────
// Bitmask: N=8 S=4 E=2 W=1
// Corner connectivity: 0°=S+W, 90°=S+E, 180°=N+E, 270°=N+W
const ORIENT_FLIP = { 0: 10, 10: 0, 16: 22, 22: 16 };
const AUTOTILE = [
[ 'track-straight', 0 ], // 0: isolated
[ 'track-straight', 16 ], // 1: W
[ 'track-straight', 16 ], // 2: E
[ 'track-straight', 16 ], // 3: E+W
[ 'track-straight', 0 ], // 4: S
[ 'track-corner', 0 ], // 5: S+W
[ 'track-corner', 16 ], // 6: S+E
[ 'track-straight', 16 ], // 7: S+E+W
[ 'track-straight', 0 ], // 8: N
[ 'track-corner', 22 ], // 9: N+W
[ 'track-corner', 10 ], // 10: N+E
[ 'track-straight', 16 ], // 11: N+E+W
[ 'track-straight', 0 ], // 12: N+S
[ 'track-straight', 0 ], // 13: N+S+W
[ 'track-straight', 0 ], // 14: N+S+E
[ 'track-straight', 0 ], // 15: N+S+E+W
];
// ─── State ────────────────────────────────────────────────
const grid = new Map(); // "gx,gz" → { type, orient, isFinish, mesh }
let tool = 'road'; // 'road', 'erase'
function cellKey( gx, gz ) { return gx + ',' + gz; }
// ─── Renderer ─────────────────────────────────────────────
const renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.shadowMap.enabled = true;
renderer.toneMapping = THREE.ACESFilmicToneMapping;
renderer.toneMappingExposure = 1.0;
document.body.appendChild( renderer.domElement );
// ─── Scene ────────────────────────────────────────────────
const scene = new THREE.Scene();
scene.background = new THREE.Color( 0xadb2ba );
scene.fog = new THREE.Fog( 0xadb2ba, 80, 160 );
const dirLight = new THREE.DirectionalLight( 0xffffff, 5 );
dirLight.position.set( 11.4, 15, - 5.3 );
dirLight.castShadow = true;
dirLight.shadow.mapSize.setScalar( 4096 );
dirLight.shadow.camera.near = 0.5;
dirLight.shadow.camera.far = 100;
dirLight.shadow.camera.left = - 60;
dirLight.shadow.camera.right = 60;
dirLight.shadow.camera.top = 60;
dirLight.shadow.camera.bottom = - 60;
scene.add( dirLight );
const hemiLight = new THREE.HemisphereLight( 0xc8d8e8, 0x7a8a5a, 1.5 );
scene.add( hemiLight );
// Ground
const groundMat = new THREE.MeshStandardMaterial( { color: 0x369069, metalness: 0 } );
const ground = new THREE.Mesh( new THREE.PlaneGeometry( 200, 200 ), groundMat );
ground.rotation.x = - Math.PI / 2;
ground.position.y = - 0.14;
ground.receiveShadow = true;
scene.add( ground );
// Grid helper
const gridSize = 30;
const cellWorld = CELL_RAW * GRID_SCALE;
const gridHelper = new THREE.GridHelper( gridSize * cellWorld, gridSize, 0x4a7a2a, 0x4a7a2a );
gridHelper.position.y = - 0.49;
gridHelper.material.opacity = 0.3;
gridHelper.material.transparent = true;
scene.add( gridHelper );
// Track group (mirrors game structure)
const trackGroup = new THREE.Group();
trackGroup.position.y = - 0.5;
trackGroup.scale.setScalar( GRID_SCALE );
scene.add( trackGroup );
// Ghost preview group
const ghostGroup = new THREE.Group();
ghostGroup.position.y = - 0.5;
ghostGroup.scale.setScalar( GRID_SCALE );
scene.add( ghostGroup );
let ghostMesh = null;
// ─── Camera (orthographic, top-down) ──────────────────────
const frustum = 30;
const aspect = window.innerWidth / window.innerHeight;
const camera = new THREE.OrthographicCamera(
- frustum * aspect, frustum * aspect,
frustum, - frustum,
0.1, 200
);
const cellCenter = 0.5 * CELL_RAW * GRID_SCALE;
camera.position.set( cellCenter, 50, cellCenter );
camera.lookAt( cellCenter, 0, cellCenter );
const camTarget = new THREE.Vector3( cellCenter, 0, cellCenter );
window.addEventListener( 'resize', () => {
const a = window.innerWidth / window.innerHeight;
camera.left = - frustum * a;
camera.right = frustum * a;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
} );
// ─── Load models ──────────────────────────────────────────
const loader = new GLTFLoader();
const modelNames = [ 'track-straight', 'track-corner', 'track-bump', 'track-finish' ];
const models = {};
async function loadModels() {
const promises = modelNames.map( ( name ) =>
new Promise( ( resolve, reject ) => {
loader.load( `models/${ name }.glb`, ( gltf ) => {
gltf.scene.traverse( ( child ) => {
if ( child.isMesh ) child.material.side = THREE.FrontSide;
} );
models[ name ] = gltf.scene;
resolve();
}, undefined, reject );
} )
);
await Promise.all( promises );
}
// ─── Auto-tile resolve ────────────────────────────────────
// Exit bitmask for each piece type/orient
// Bits: N=8 S=4 E=2 W=1
function getCellExits( cell ) {
const t = cell.type;
const o = cell.orient;
if ( t === 'track-corner' ) {
if ( o === 0 ) return 5; // S+W
if ( o === 16 ) return 6; // S+E
if ( o === 10 ) return 10; // N+E
if ( o === 22 ) return 9; // N+W
}
// Straight, finish, bump — all symmetric
if ( o === 0 || o === 10 ) return 12; // N+S
return 3; // E+W
}
// Check which neighbors have a road exit facing toward this cell
function getConnectivityMask( gx, gz ) {
let mask = 0;
// N neighbor has S exit?
const n = grid.get( cellKey( gx, gz - 1 ) );
if ( n && ( getCellExits( n ) & 4 ) ) mask |= 8;
// S neighbor has N exit?
const s = grid.get( cellKey( gx, gz + 1 ) );
if ( s && ( getCellExits( s ) & 8 ) ) mask |= 4;
// E neighbor has W exit?
const e = grid.get( cellKey( gx + 1, gz ) );
if ( e && ( getCellExits( e ) & 1 ) ) mask |= 2;
// W neighbor has E exit?
const w = grid.get( cellKey( gx - 1, gz ) );
if ( w && ( getCellExits( w ) & 2 ) ) mask |= 1;
return mask;
}
// Raw presence mask (any road in adjacent cell)
function getPresenceMask( gx, gz ) {
let mask = 0;
if ( grid.has( cellKey( gx, gz - 1 ) ) ) mask |= 8;
if ( grid.has( cellKey( gx, gz + 1 ) ) ) mask |= 4;
if ( grid.has( cellKey( gx + 1, gz ) ) ) mask |= 2;
if ( grid.has( cellKey( gx - 1, gz ) ) ) mask |= 1;
return mask;
}
// Count bits in a 4-bit mask
function bitCount( mask ) {
return ( mask >> 3 & 1 ) + ( mask >> 2 & 1 ) + ( mask >> 1 & 1 ) + ( mask & 1 );
}
// Count how many of a cell's exits are connected to neighbors
function connectedExitCount( gx, gz ) {
const cell = grid.get( cellKey( gx, gz ) );
if ( ! cell ) return 0;
return bitCount( getCellExits( cell ) & getConnectivityMask( gx, gz ) );
}
// When a new cell has 3+ neighbors, pick the best pair to connect.
// Prefer corners over straights, then prefer neighbors with more existing connections.
const DIR_INFO = [
{ bit: 8, dx: 0, dz: - 1 }, // N
{ bit: 4, dx: 0, dz: 1 }, // S
{ bit: 2, dx: 1, dz: 0 }, // E
{ bit: 1, dx: - 1, dz: 0 }, // W
];
function pickBestPair( mask, gx, gz ) {
const active = DIR_INFO.filter( d => mask & d.bit );
if ( active.length <= 2 ) return mask;
let bestMask = active[ 0 ].bit | active[ 1 ].bit;
let bestScore = - 1;
let bestIsCorner = false;
for ( let i = 0; i < active.length; i ++ ) {
for ( let j = i + 1; j < active.length; j ++ ) {
const pairMask = active[ i ].bit | active[ j ].bit;
const isCorner = ( pairMask !== 3 && pairMask !== 12 ); // not E+W or N+S
const s1 = connectedExitCount( gx + active[ i ].dx, gz + active[ i ].dz );
const s2 = connectedExitCount( gx + active[ j ].dx, gz + active[ j ].dz );
const score = s1 + s2;
if ( ( isCorner && ! bestIsCorner ) ||
( isCorner === bestIsCorner && score > bestScore ) ) {
bestMask = pairMask;
bestScore = score;
bestIsCorner = isCorner;
}
}
}
return bestMask;
}
// Only count neighbors that can actually connect:
// either they already exit toward us, or they have a free (unconnected) exit
function getAvailableMask( gx, gz ) {
let mask = 0;
const dirs = [
[ 0, - 1, 8, 4 ], // N neighbor, sets N bit, check if neighbor has S exit
[ 0, 1, 4, 8 ], // S neighbor, sets S bit, check if neighbor has N exit
[ 1, 0, 2, 1 ], // E neighbor, sets E bit, check if neighbor has W exit
[ - 1, 0, 1, 2 ], // W neighbor, sets W bit, check if neighbor has E exit
];
for ( const [ dx, dz, bit, oppBit ] of dirs ) {
const neighbor = grid.get( cellKey( gx + dx, gz + dz ) );
if ( ! neighbor ) continue;
const exits = getCellExits( neighbor );
// Already has an exit facing us
if ( exits & oppBit ) { mask |= bit; continue; }
// Has a free (unconnected) exit — could change to face us
const conn = getConnectivityMask( gx + dx, gz + dz );
if ( bitCount( exits & conn ) < 2 ) mask |= bit;
}
return mask;
}
// Resolve tile for new cells: use available neighbors, pick best pair if 3+
function resolveNewTile( gx, gz ) {
const pMask = getAvailableMask( gx, gz );
if ( bitCount( pMask ) >= 3 ) {
return AUTOTILE[ pickBestPair( pMask, gx, gz ) ];
}
return AUTOTILE[ pMask ];
}
function resolveTile( gx, gz ) {
const cMask = getConnectivityMask( gx, gz );
// If any neighbor connects toward us, use connectivity-based auto-tile
if ( cMask !== 0 ) return AUTOTILE[ cMask ];
// No neighbor connects toward us — orient parallel to nearest road
const pMask = getPresenceMask( gx, gz );
if ( pMask !== 0 ) {
// Find any adjacent road cell and match its direction
const dirs = [ [ 0, - 1, 8 ], [ 0, 1, 4 ], [ 1, 0, 2 ], [ - 1, 0, 1 ] ];
for ( const [ dx, dz, bit ] of dirs ) {
if ( ! ( pMask & bit ) ) continue;
const neighbor = grid.get( cellKey( gx + dx, gz + dz ) );
if ( ! neighbor ) continue;
const exits = getCellExits( neighbor );
// Match the neighbor's running direction
if ( exits & 12 ) return [ 'track-straight', 0 ]; // neighbor runs N-S
if ( exits & 3 ) return [ 'track-straight', 16 ]; // neighbor runs E-W
}
}
return AUTOTILE[ 0 ]; // isolated default
}
function placeMesh( gx, gz, cell ) {
if ( cell.mesh ) trackGroup.remove( cell.mesh );
const src = models[ cell.type ];
if ( ! src ) return;
const mesh = src.clone();
mesh.position.set( ( gx + 0.5 ) * CELL_RAW, 0.5, ( gz + 0.5 ) * CELL_RAW );
mesh.rotation.y = THREE.MathUtils.degToRad( ORIENT_DEG[ cell.orient ] || 0 );
mesh.traverse( ( c ) => {
if ( c.isMesh ) {
c.castShadow = true;
c.receiveShadow = true;
}
} );
trackGroup.add( mesh );
cell.mesh = mesh;
}
function resolveCell( gx, gz ) {
const key = cellKey( gx, gz );
const cell = grid.get( key );
if ( ! cell ) return;
let baseType, orient;
if ( ! cell.mesh ) {
// New cell: connect to neighbors, pick best pair if 3+
[ baseType, orient ] = resolveNewTile( gx, gz );
} else {
// Existing cell: re-resolve, but don't break existing connections
const cMask = getConnectivityMask( gx, gz );
const currentExits = getCellExits( cell );
const currentConnected = currentExits & cMask;
[ baseType, orient ] = resolveTile( gx, gz );
// Check if the proposed shape keeps all current connections
const proposedExits = getCellExits( { type: baseType, orient } );
if ( ( proposedExits & currentConnected ) !== currentConnected ) {
// Would disconnect something — keep current shape
return;
}
}
// Finish cells use track-finish but only when resolved as straight
const type = ( cell.isFinish && baseType === 'track-straight' ) ? 'track-finish' : baseType;
// Skip if nothing changed and mesh already exists
if ( cell.type === type && cell.orient === orient && cell.mesh ) return;
cell.type = type;
cell.orient = orient;
placeMesh( gx, gz, cell );
}
function resolveCellAndNeighbors( gx, gz ) {
resolveCell( gx, gz );
resolveCell( gx, gz - 1 );
resolveCell( gx, gz + 1 );
resolveCell( gx + 1, gz );
resolveCell( gx - 1, gz );
}
// ─── Cell operations ──────────────────────────────────────
function placeRoad( gx, gz ) {
const key = cellKey( gx, gz );
if ( grid.has( key ) ) {
const cell = grid.get( key );
// Click on finish tile → flip direction (rotate 180°)
if ( cell.isFinish ) {
cell.orient = ORIENT_FLIP[ cell.orient ] ?? cell.orient;
placeMesh( gx, gz, cell );
save();
}
return;
}
grid.set( key, { type: 'track-straight', orient: 0, isFinish: false, mesh: null } );
resolveCellAndNeighbors( gx, gz );
save();
}
function placeFinish() {
const cell = { type: 'track-finish', orient: 0, isFinish: true, mesh: null };
grid.set( cellKey( 0, 0 ), cell );
placeMesh( 0, 0, cell );
}
function eraseRoad( gx, gz ) {
const key = cellKey( gx, gz );
if ( ! grid.has( key ) ) return;
// Don't allow erasing the finish tile
const cell = grid.get( key );
if ( cell.isFinish ) return;
if ( cell.mesh ) trackGroup.remove( cell.mesh );
grid.delete( key );
// Re-resolve neighbors
resolveCell( gx, gz - 1 );
resolveCell( gx, gz + 1 );
resolveCell( gx + 1, gz );
resolveCell( gx - 1, gz );
save();
}
function clearAll() {
for ( const [ , cell ] of grid ) {
if ( cell.mesh ) trackGroup.remove( cell.mesh );
}
grid.clear();
placeFinish();
save();
}
// ─── Ghost preview ────────────────────────────────────────
// Neighbor cells whose meshes are temporarily swapped during ghost preview
const ghostNeighborBackups = []; // { cell, originalMesh }
function addGhostPiece( type, orient, gx, gz, opacity ) {
const src = models[ type ];
if ( ! src ) return;
const mesh = src.clone();
mesh.position.set( ( gx + 0.5 ) * CELL_RAW, 0.5, ( gz + 0.5 ) * CELL_RAW );
const deg = ORIENT_DEG[ orient ] || 0;
mesh.rotation.y = THREE.MathUtils.degToRad( deg );
mesh.traverse( ( c ) => {
if ( c.isMesh ) {
c.material = c.material.clone();
c.material.transparent = true;
c.material.opacity = opacity;
}
} );
ghostGroup.add( mesh );
}
function updateGhost( gx, gz ) {
clearGhost();
if ( tool === 'erase' ) return;
const key = cellKey( gx, gz );
if ( grid.has( key ) ) return; // already occupied
// Temporarily insert ghost cell into grid
const ghostCell = { type: 'track-straight', orient: 0, isFinish: false, mesh: null };
grid.set( key, ghostCell );
// Resolve ghost: connect to neighbors, pick best pair if 3+
const [ type, orient ] = resolveNewTile( gx, gz );
// Update ghost cell in grid so neighbors see its correct exits
ghostCell.type = type;
ghostCell.orient = orient;
// Show ghost piece
addGhostPiece( type, orient, gx, gz, 0.4 );
// Check how neighbors would change and preview those changes
const neighbors = [ [ gx, gz - 1 ], [ gx, gz + 1 ], [ gx + 1, gz ], [ gx - 1, gz ] ];
for ( const [ nx, nz ] of neighbors ) {
const nKey = cellKey( nx, nz );
const nCell = grid.get( nKey );
if ( ! nCell ) continue;
// Re-resolve neighbor, but skip if it would break existing connections
const nExits = getCellExits( nCell );
const nConn = getConnectivityMask( nx, nz );
const nConnected = nExits & nConn;
const [ newType, newOrient ] = resolveTile( nx, nz );
const proposedExits = getCellExits( { type: newType, orient: newOrient } );
if ( ( proposedExits & nConnected ) !== nConnected ) continue;
const finalType = ( nCell.isFinish && newType === 'track-straight' ) ? 'track-finish' : newType;
if ( finalType !== nCell.type || newOrient !== nCell.orient ) {
// Hide the real mesh temporarily
if ( nCell.mesh ) {
nCell.mesh.visible = false;
ghostNeighborBackups.push( { cell: nCell } );
}
// Show preview of what the neighbor would become
addGhostPiece( finalType, newOrient, nx, nz, 0.7 );
}
}
// Remove the temporary ghost cell from the grid
grid.delete( key );
}
function clearGhost() {
// Restore hidden neighbor meshes
for ( const { cell } of ghostNeighborBackups ) {
if ( cell.mesh ) cell.mesh.visible = true;
}
ghostNeighborBackups.length = 0;
// Remove all ghost preview meshes
while ( ghostGroup.children.length > 0 ) {
ghostGroup.remove( ghostGroup.children[ 0 ] );
}
}
// ─── Raycasting ───────────────────────────────────────────
const raycaster = new THREE.Raycaster();
const mouse = new THREE.Vector2();
let hoveredCell = null;
function screenToGrid( clientX, clientY ) {
mouse.x = ( clientX / window.innerWidth ) * 2 - 1;
mouse.y = - ( clientY / window.innerHeight ) * 2 + 1;
raycaster.setFromCamera( mouse, camera );
const plane = new THREE.Plane( new THREE.Vector3( 0, 1, 0 ), 0.51 );
const hit = new THREE.Vector3();
raycaster.ray.intersectPlane( plane, hit );
if ( ! hit ) return null;
const gx = Math.floor( hit.x / cellWorld );
const gz = Math.floor( hit.z / cellWorld );
return { gx, gz };
}
// ─── Persistence ──────────────────────────────────────────
function save() {
const arr = [];
for ( const [ key, cell ] of grid ) {
const [ gx, gz ] = key.split( ',' ).map( Number );
arr.push( [ gx, gz, cell.type, cell.orient ] );
}
const encoded = encodeCells( arr );
localStorage.setItem( 'racing-editor-cells', encoded );
}
function loadSaved() {
const params = new URLSearchParams( window.location.search );
const mapParam = params.get( 'map' );
const encoded = mapParam || localStorage.getItem( 'racing-editor-cells' );
if ( ! encoded ) return;
try {
const arr = decodeCells( encoded );
for ( const [ gx, gz, type, orient ] of arr ) {
const isFinish = ( type === 'track-finish' );
const cell = { type, orient, isFinish, mesh: null };
grid.set( cellKey( gx, gz ), cell );
placeMesh( gx, gz, cell );
}
} catch ( e ) {
console.warn( 'Failed to load saved map', e );
}
}
// ─── Toast ────────────────────────────────────────────────
let toastTimer = 0;
function showToast( msg ) {
const el = document.getElementById( 'toast' );
el.textContent = msg;
el.classList.add( 'show' );
clearTimeout( toastTimer );
toastTimer = setTimeout( () => el.classList.remove( 'show' ), 2000 );
}
// ─── Toolbar ──────────────────────────────────────────────
const btnRoad = document.getElementById( 'btn-road' );
const btnErase = document.getElementById( 'btn-erase' );
function selectTool( t ) {
tool = t;
btnRoad.classList.toggle( 'active', t === 'road' );
btnErase.classList.toggle( 'active', t === 'erase' );
}
btnRoad.addEventListener( 'click', () => selectTool( 'road' ) );
btnErase.addEventListener( 'click', () => selectTool( 'erase' ) );
function getCellsArray() {
const arr = [];
for ( const [ key, cell ] of grid ) {
const [ gx, gz ] = key.split( ',' ).map( Number );
arr.push( [ gx, gz, cell.type, cell.orient ] );
}
return arr;
}
document.getElementById( 'btn-play' ).addEventListener( 'click', () => {
if ( grid.size === 0 ) {
showToast( 'Draw some road first!' );
return;
}
const encoded = encodeCells( getCellsArray() );
window.open( 'index.html?map=' + encoded, '_blank' );
} );
document.getElementById( 'btn-share' ).addEventListener( 'click', () => {
if ( grid.size === 0 ) {
showToast( 'Draw some road first!' );
return;
}
const encoded = encodeCells( getCellsArray() );
const base = window.location.href.replace( /editor\.html.*/, '' );
const url = base + 'index.html?map=' + encoded;
navigator.clipboard.writeText( url ).then( () => {
showToast( 'Link copied to clipboard!' );
} ).catch( () => {
showToast( url );
} );
} );
document.getElementById( 'btn-clear' ).addEventListener( 'click', () => {
clearAll();
showToast( 'Track cleared' );
} );
// ─── Input (pointer events) ───────────────────────────────
let isPanning = false;
let isDrawing = false;
let isErasing = false;
let panStart = { x: 0, y: 0 };
let camStart = { x: 0, z: 0 };
let lastDrawCell = null;
let spaceDown = false;
// Track active pointers for multi-touch (pinch/pan)
const pointers = new Map();
let pinchStartDist = 0;
let pinchStartZoom = 1;
const el = renderer.domElement;
el.addEventListener( 'contextmenu', ( e ) => e.preventDefault() );
function handleDraw( clientX, clientY ) {
const cell = screenToGrid( clientX, clientY );
if ( ! cell ) return;
if ( lastDrawCell && lastDrawCell.gx === cell.gx && lastDrawCell.gz === cell.gz ) return;
lastDrawCell = cell;
if ( isErasing ) {
eraseRoad( cell.gx, cell.gz );
} else if ( isDrawing ) {
placeRoad( cell.gx, cell.gz );
}
}
function getPinchDist() {
const pts = [ ...pointers.values() ];
const dx = pts[ 1 ].x - pts[ 0 ].x;
const dy = pts[ 1 ].y - pts[ 0 ].y;
return Math.sqrt( dx * dx + dy * dy );
}
function getPinchMid() {
const pts = [ ...pointers.values() ];
return {
x: ( pts[ 0 ].x + pts[ 1 ].x ) / 2,
y: ( pts[ 0 ].y + pts[ 1 ].y ) / 2
};
}
el.addEventListener( 'pointerdown', ( e ) => {
el.setPointerCapture( e.pointerId );
pointers.set( e.pointerId, { x: e.clientX, y: e.clientY } );
// Two pointers → switch to pan/pinch
if ( pointers.size === 2 ) {
isDrawing = false;
isErasing = false;
isPanning = true;
const mid = getPinchMid();
panStart.x = mid.x;
panStart.y = mid.y;
camStart.x = camTarget.x;
camStart.z = camTarget.z;
pinchStartDist = getPinchDist();
pinchStartZoom = camera.zoom;
return;
}
if ( pointers.size > 2 ) return;
// Single pointer
// Middle mouse, ctrl+click, or space+click → pan
if ( e.button === 1 || ( e.button === 0 && ( e.ctrlKey || e.metaKey || spaceDown ) ) ) {
isPanning = true;
panStart.x = e.clientX;
panStart.y = e.clientY;
camStart.x = camTarget.x;
camStart.z = camTarget.z;