forked from redblobgames/mapgen4
-
Notifications
You must be signed in to change notification settings - Fork 0
/
worker.js
69 lines (57 loc) · 2.42 KB
/
worker.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
/*
* From https://www.redblobgames.com/maps/mapgen4/
* Copyright 2018 Red Blob Games <[email protected]>
* License: Apache v2.0 <http://www.apache.org/licenses/LICENSE-2.0.html>
*
* This module runs the worker thread that calculates the map data.
*/
'use strict';
const DualMesh = require('@redblobgames/dual-mesh');
const Map = require('./map');
const Geometry = require('./geometry');
/**
* @typedef { import("./types").Mesh } Mesh
*/
function Worker(self) {
// This handler is for the initial message
let handler = event => {
const param = event.data.param;
// NOTE: web worker messages only include the data; to
// reconstruct the full object I call the constructor again
// and then copy the data over
const mesh = /** @type{Mesh} */(new DualMesh(event.data.mesh));
Object.assign(mesh, event.data.mesh);
const map = new Map(mesh, event.data.peaks_t, param);
// TODO: placeholder
const run = {elevation: true, biomes: true, rivers: true};
// This handler is for all subsequent messages
handler = event => {
let {param, constraints, quad_elements_buffer, a_quad_em_buffer, a_river_xyuv_buffer} = event.data;
let numRiverTriangles = 0;
let start_time = performance.now();
if (run.elevation) { map.assignElevation(param.elevation, constraints); }
if (run.biomes) { map.assignRainfall(param.biomes); }
if (run.rivers) { map.assignRivers(param.rivers); }
if (run.elevation || run.rivers) {
Geometry.setMapGeometry(map, new Int32Array(quad_elements_buffer), new Float32Array(a_quad_em_buffer));
}
if (run.rivers) { numRiverTriangles = Geometry.setRiverTextures(map, param.spacing, param.rivers, new Float32Array(a_river_xyuv_buffer)); }
let elapsed = performance.now() - start_time;
self.postMessage(
{elapsed,
numRiverTriangles,
quad_elements_buffer,
a_quad_em_buffer,
a_river_xyuv_buffer,
},
[
quad_elements_buffer,
a_quad_em_buffer,
a_river_xyuv_buffer,
]
);
};
};
self.addEventListener('message', event => handler(event));
}
module.exports = Worker;