2026年3月28日 星期六

[水井USR] 在Pythonanaywhere上用Django網站展現海洋的畫面

 


成果網站：https://oceandjango.pythonanywhere.com/

1.mysite/mysite/settings.py

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"""
Django settings for mysite project.

Generated by 'django-admin startproject' using Django 5.1.3.

For more information on this file, see
https://docs.djangoproject.com/en/5.1/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/5.1/ref/settings/
"""

from pathlib import Path

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/5.1/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = "django-insecure-s*a))3o=9_p0w+=q40wek=*30-&59e5(+3#8%!jp43kq2j1!t9"

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = ['oceandjango.pythonanywhere.com']


# Application definition

INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    "myapp",
]

MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "django.contrib.sessions.middleware.SessionMiddleware",
    "django.middleware.common.CommonMiddleware",
    "django.middleware.csrf.CsrfViewMiddleware",
    "django.contrib.auth.middleware.AuthenticationMiddleware",
    "django.contrib.messages.middleware.MessageMiddleware",
    "django.middleware.clickjacking.XFrameOptionsMiddleware",
]

ROOT_URLCONF = "mysite.urls"

TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        "DIRS": [BASE_DIR / 'templates'],
        "APP_DIRS": True,
        "OPTIONS": {
            "context_processors": [
                "django.template.context_processors.debug",
                "django.template.context_processors.request",
                "django.contrib.auth.context_processors.auth",
                "django.contrib.messages.context_processors.messages",
            ],
        },
    },
]

WSGI_APPLICATION = "mysite.wsgi.application"


# Database
# https://docs.djangoproject.com/en/5.1/ref/settings/#databases

DATABASES = {
    "default": {
        "ENGINE": "django.db.backends.sqlite3",
        "NAME": BASE_DIR / "db.sqlite3",
    }
}


# Password validation
# https://docs.djangoproject.com/en/5.1/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        "NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator",
    },
    {
        "NAME": "django.contrib.auth.password_validation.MinimumLengthValidator",
    },
    {
        "NAME": "django.contrib.auth.password_validation.CommonPasswordValidator",
    },
    {
        "NAME": "django.contrib.auth.password_validation.NumericPasswordValidator",
    },
]


# Internationalization
# https://docs.djangoproject.com/en/5.1/topics/i18n/

LANGUAGE_CODE = "en-us"

TIME_ZONE = "UTC"

USE_I18N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/5.1/howto/static-files/

STATIC_URL = "static/"

# Default primary key field type
# https://docs.djangoproject.com/en/5.1/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

# default static files settings for PythonAnywhere.
# see https://help.pythonanywhere.com/pages/DjangoStaticFiles for more info
MEDIA_ROOT = '/home/oceandjango/mysite/media'
MEDIA_URL = '/media/'
STATIC_ROOT = '/home/oceandjango/mysite/static'
STATIC_URL = '/static/'
STATICFILES_DIRS = [BASE_DIR / 'static']

2.mysite/mysite/urls.py
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"""
URL configuration for mysite project.

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/5.1/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""

from django.contrib import admin
from django.urls import path
from myapp import views

urlpatterns = [
    path("admin/", admin.site.urls),
    path('', views.sea_view, name='sea'),
]

3.mysite/myapp/views.py
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from django.shortcuts import render

def sea_view(request):
    return render(request, 'index.html')

4.mysite/templates/index.html

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<!DOCTYPE html>
<html lang="zh-TW">
<head>
  <meta charset="utf-8">
  <title>三維海洋 - 動態水面</title>
  <style>
    body { margin: 0; overflow: hidden; background: #000; font-family: "Microsoft JhengHei", Arial, sans-serif; }
    canvas { display: block; }
    #info {
      position: absolute;
      top: 10px;
      left: 10px;
      color: white;
      background: rgba(0,0,0,0.4);
      padding: 10px;
      border-radius: 5px;
      font-size: 14px;
    }
  </style>
</head>
<body>

<div id="info">拖曳滑鼠旋轉視角 • 滾輪縮放 • 享受台灣海洋</div>

<!-- 1. es-module-shims -->
<script async src="https://ga.jspm.io/npm:es-module-shims@2.8.0/dist/es-module-shims.js"></script>

<!-- 2. Import Map -->
<script type="importmap">
{
  "imports": {
    "three": "https://cdn.jsdelivr.net/npm/three@0.134.0/build/three.module.js",
    "three/addons/": "https://cdn.jsdelivr.net/npm/three@0.134.0/examples/jsm/"
  }
}
</script>

<script type="module">
  import * as THREE from 'three';
  import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
  import { Water } from 'three/addons/objects/Water.js';
  import { Sky } from 'three/addons/objects/Sky.js';

  const scene = new THREE.Scene();
  const camera = new THREE.PerspectiveCamera(55, window.innerWidth / window.innerHeight, 1, 20000);
  camera.position.set(30, 40, 120);

  const renderer = new THREE.WebGLRenderer({ antialias: true });
  renderer.setPixelRatio(window.devicePixelRatio);
  renderer.setSize(window.innerWidth, window.innerHeight);
  renderer.toneMapping = THREE.ACESFilmicToneMapping;
  renderer.toneMappingExposure = 0.6;
  document.body.appendChild(renderer.domElement);

  const controls = new OrbitControls(camera, renderer.domElement);
  controls.target.set(0, 10, 0);
  controls.enableDamping = true;
  controls.update();

  // 海洋
  const waterGeometry = new THREE.PlaneGeometry(10000, 10000);
  const water = new Water(
    waterGeometry,
    {
      textureWidth: 512,
      textureHeight: 512,
      waterNormals: new THREE.TextureLoader().load('https://threejs.org/examples/textures/waternormals.jpg', (texture) => {
        texture.wrapS = texture.wrapT = THREE.RepeatWrapping;
      }),
      sunDirection: new THREE.Vector3(0, -1, 0),
      sunColor: 0xffffff,
      waterColor: 0x001e0f,
      distortionScale: 3.7,
      fog: scene.fog !== undefined
    }
  );
  water.rotation.x = -Math.PI / 2;
  scene.add(water);

  // 天空
  const sky = new Sky();
  sky.scale.setScalar(10000);
  scene.add(sky);

  const skyUniforms = sky.material.uniforms;
  skyUniforms['turbidity'].value = 10;
  skyUniforms['rayleigh'].value = 2;
  skyUniforms['mieCoefficient'].value = 0.005;
  skyUniforms['mieDirectionalG'].value = 0.8;

  const parameters = { elevation: 5, azimuth: 180 };
  const sun = new THREE.Vector3();

  function updateSun() {
    const phi = THREE.MathUtils.degToRad(90 - parameters.elevation);
    const theta = THREE.MathUtils.degToRad(parameters.azimuth);
    sun.setFromSphericalCoords(1, phi, theta);
    sky.material.uniforms['sunPosition'].value.copy(sun);
    water.material.uniforms['sunDirection'].value.copy(sun).normalize();
  }
  updateSun();

  // 視窗調整
  window.addEventListener('resize', () => {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth, window.innerHeight);
  });

  // 動畫迴圈
  function animate() {
    requestAnimationFrame(animate);
    water.material.uniforms['time'].value += 0.02;
    controls.update();
    renderer.render(scene, camera);
  }
  animate();
</script>
</body>
</html>
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