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Gerstner raft

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This commit is contained in:
Adrien MALINGREY 2023-06-05 12:10:48 +02:00
parent cbcec7e387
commit c85aaf96a8
2 changed files with 61 additions and 10 deletions
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10
index.html
View File

@ -6,15 +6,9 @@
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link rel="shortcut icon" type="image/x-icon" href="favicon.php"/>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div id="container"></div>
<span id="message">Libre !</span>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/es-module-shims@1.6.3/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
@ -23,6 +17,10 @@
}
}
</script>
</head>
<body>
<div id="container"></div>
<span id="message">Libre !</span>
<script type="module" src="main.js"></script>

61
main.js
View File

@ -532,10 +532,60 @@ function teleportPlayerIfOob() {
}
const waves = {
A: {
direction: 0,
steepness: 0.015,
wavelength: 10,
},
B: {
direction: 30,
steepness: 0.015,
wavelength: 5,
},
C: {
direction: 60,
steepness: 0.015,
wavelength: 3,
},
}
function getWaveInfo(x, z, time) {
const pos = new THREE.Vector3()
const tangent = new THREE.Vector3(1, 0, 0)
const binormal = new THREE.Vector3(0, 0, 1)
Object.keys(waves).forEach(function (wave) {
const w = waves[wave]
const k = (Math.PI * 2) / w.wavelength
const c = Math.sqrt(9.8 / k)
const d = new THREE.Vector2(
Math.sin((w.direction * Math.PI) / 180),
-Math.cos((w.direction * Math.PI) / 180)
)
const f = k * (d.dot(new THREE.Vector2(x, z)) - c * time)
const a = w.steepness / k
pos.x += d.y * (a * Math.cos(f))
pos.y += a * Math.sin(f)
pos.z += d.x * (a * Math.cos(f))
tangent.x += -d.x * d.x * (w.steepness * Math.sin(f))
tangent.y += d.x * (w.steepness * Math.cos(f))
tangent.z += -d.x * d.y * (w.steepness * Math.sin(f))
binormal.x += -d.x * d.y * (w.steepness * Math.sin(f))
binormal.y += d.y * (w.steepness * Math.cos(f))
binormal.z += -d.y * d.y * (w.steepness * Math.sin(f))
})
const normal = binormal.cross(tangent).normalize()
return {
position: pos,
normal: normal,
}
}
function animate() {
const deltaTime = Math.min( 0.05, clock.getDelta() ) / STEPS_PER_FRAME;
const delta = Math.min( 0.05, clock.getDelta() )
const deltaTime = delta / STEPS_PER_FRAME;
// we look for collisions in substeps to mitigate the risk of
// an object traversing another too quickly for detection.
@ -553,9 +603,12 @@ function animate() {
const time = clock.elapsedTime;
ocean.material.uniforms[ 'time' ].value += 1.0 / 100.0;
raft.rotation.z = 0.06 * Math.cos( 1.1 * time )
raft.rotation.x = 0.05 * Math.cos( 1.0 * time )
raft.position.y = 0.03 * (0.6 * Math.sin( 1.1 * time ) + 0.5 * Math.sin( 1.0 * time ))
const waveInfo = getWaveInfo(raft.position.x, raft.position.z, time)
raft.position.y = waveInfo.position.y
const quat = new THREE.Quaternion().setFromEuler(
new THREE.Euler(waveInfo.normal.x, waveInfo.normal.y, waveInfo.normal.z)
)
raft.quaternion.rotateTowards(quat, delta * 0.5)
if ( sunLight.visible ) {