From bf1521ecf3702f0c8266a36992d2ef2e4b03ae9f Mon Sep 17 00:00:00 2001
From: tengge1 <930372551@qq.com>
Date: Sun, 15 Dec 2019 20:18:23 +0800
Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=A2=9E=E4=B8=8B=E9=9B=AA=E5=A4=A9?=
 =?UTF-8?q?=E6=B0=94=E3=80=82?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                     |   2 +-
 .../assets/textures/particles/raindrop-1.png  | Bin 0 -> 7764 bytes
 .../assets/textures/particles/raindrop-2.png  | Bin 0 -> 8227 bytes
 .../assets/textures/particles/snowflake1.png  | Bin 0 -> 861 bytes
 .../assets/textures/particles/snowflake2.png  | Bin 0 -> 1320 bytes
 .../assets/textures/particles/snowflake3.png  | Bin 0 -> 1395 bytes
 .../assets/textures/particles/snowflake4.png  | Bin 0 -> 664 bytes
 .../assets/textures/particles/snowflake5.png  | Bin 0 -> 893 bytes
 ShadowEditor.Web/src/event/WeatherEvent.js    |  47 +++++-------
 ShadowEditor.Web/src/object/weather/Rain.js   |  35 ++++++++-
 ShadowEditor.Web/src/object/weather/Snow.js   |  72 ++++++++++++++++++
 11 files changed, 125 insertions(+), 31 deletions(-)
 create mode 100644 ShadowEditor.Web/assets/textures/particles/raindrop-1.png
 create mode 100644 ShadowEditor.Web/assets/textures/particles/raindrop-2.png
 create mode 100644 ShadowEditor.Web/assets/textures/particles/snowflake1.png
 create mode 100644 ShadowEditor.Web/assets/textures/particles/snowflake2.png
 create mode 100644 ShadowEditor.Web/assets/textures/particles/snowflake3.png
 create mode 100644 ShadowEditor.Web/assets/textures/particles/snowflake4.png
 create mode 100644 ShadowEditor.Web/assets/textures/particles/snowflake5.png

diff --git a/README.md b/README.md
index 62762f6f..a7cd41fa 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ Supported Languages: 中文 / [繁體中文](README-tw.md) / [English](README-en
 10. 使用`点击场景添加模型`方式时，模型放置到场景之前出现一个预览效果。
 11. 新增编辑工具栏：撤销、重做、清空历史记录、复制、删除。
 12. 几何体菜单添加文字功能，修改为不缩放的文字。
-13. 新增添加设置：无、下雨。
+13. 新增添加设置：无、下雨、下雪。
 
 ## 技术分享
 
diff --git a/ShadowEditor.Web/assets/textures/particles/raindrop-1.png b/ShadowEditor.Web/assets/textures/particles/raindrop-1.png
new file mode 100644
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diff --git a/ShadowEditor.Web/src/event/WeatherEvent.js b/ShadowEditor.Web/src/event/WeatherEvent.js
index 7eb8625d..78095896 100644
--- a/ShadowEditor.Web/src/event/WeatherEvent.js
+++ b/ShadowEditor.Web/src/event/WeatherEvent.js
@@ -1,5 +1,6 @@
 import BaseEvent from './BaseEvent';
 import Rain from '../object/weather/Rain';
+import Snow from '../object/weather/Snow';
 
 /**
  * 视图事件
@@ -9,6 +10,7 @@ function WeatherEvent() {
     BaseEvent.call(this);
 
     this.weather = '';
+    this.object = null;
 
     this.onOptionChange = this.onOptionChange.bind(this);
     this.onAfterRender = this.onAfterRender.bind(this);
@@ -31,42 +33,33 @@ WeatherEvent.prototype.onOptionChange = function (name, value) {
         return;
     }
     this.weather = value;
-};
 
-WeatherEvent.prototype.onAfterRender = function () {
-    if (this.weather === 'rain') {
-        this.updateRain();
-    } else if (this.weather === 'snow') {
-        this.updateSnow();
+    if (this.object) {
+        app.editor.sceneHelpers.remove(this.object);
+        this.object = null;
     }
-};
 
-WeatherEvent.prototype.updateRain = function () {
-    if (this.rain === undefined) {
-        this.rain = new Rain();
+    if (this.weather === 'rain') {
+        if (this.rain === undefined) {
+            this.rain = new Rain();
+        }
+        this.object = this.rain;
         app.editor.sceneHelpers.add(this.rain);
     }
 
-    let vertices = this.rain.geometry.vertices;
-
-    vertices.forEach(v => {
-        v.y = v.y - v.velocityY;
-        v.x = v.x - v.velocityX;
-
-        if (v.y <= 0) {
-            v.y = 60;
+    if (this.weather === 'snow') {
+        if (this.snow === undefined) {
+            this.snow = new Snow();
         }
-
-        if (v.x <= -20 || v.x >= 20) {
-            v.velocityX = v.velocityX * -1;
-        }
-    });
-
-    this.rain.geometry.verticesNeedUpdate = true;
+        this.object = this.snow;
+        app.editor.sceneHelpers.add(this.snow);
+    }
 };
 
-WeatherEvent.prototype.updateSnow = function () {
-
+WeatherEvent.prototype.onAfterRender = function () {
+    if (this.object) {
+        this.object.update();
+    }
 };
 
 export default WeatherEvent;
\ No newline at end of file
diff --git a/ShadowEditor.Web/src/object/weather/Rain.js b/ShadowEditor.Web/src/object/weather/Rain.js
index 169654ac..97c1f1c1 100644
--- a/ShadowEditor.Web/src/object/weather/Rain.js
+++ b/ShadowEditor.Web/src/object/weather/Rain.js
@@ -1,8 +1,14 @@
 /**
  * 下雨
  */
-class Rain extends THREE.Points {
+class Rain extends THREE.Object3D {
     constructor() {
+        super();
+
+        this.createPointClouds('assets/textures/particles/raindrop-3.png');
+    }
+
+    createPointClouds(url) {
         let geometry = new THREE.Geometry();
 
         let range = 40;
@@ -21,12 +27,35 @@ class Rain extends THREE.Points {
             size: 3,
             transparent: true,
             opacity: 0.6,
-            map: new THREE.TextureLoader().load('assets/textures/particles/raindrop-3.png'),
+            map: new THREE.TextureLoader().load(url),
             blending: THREE.AdditiveBlending,
             sizeAttenuation: true,
             color: 0xffffff
         });
-        super(geometry, material);
+
+        let points = new THREE.Points(geometry, material);
+        points.sortParticles = true;
+
+        this.add(points);
+    }
+
+    update() {
+        this.children.forEach(n => {
+            n.geometry.vertices.forEach(v => {
+                v.y = v.y - v.velocityY;
+                v.x = v.x - v.velocityX;
+
+                if (v.y <= 0) {
+                    v.y = 60;
+                }
+
+                if (v.x <= -20 || v.x >= 20) {
+                    v.velocityX = v.velocityX * -1;
+                }
+            });
+
+            n.geometry.verticesNeedUpdate = true;
+        });
     }
 }
 
diff --git a/ShadowEditor.Web/src/object/weather/Snow.js b/ShadowEditor.Web/src/object/weather/Snow.js
index e69de29b..0726f205 100644
--- a/ShadowEditor.Web/src/object/weather/Snow.js
+++ b/ShadowEditor.Web/src/object/weather/Snow.js
@@ -0,0 +1,72 @@
+/**
+ * 下雪
+ */
+class Snow extends THREE.Object3D {
+    constructor() {
+        super();
+
+        this.createPointClouds('assets/textures/particles/snowflake1.png');
+        this.createPointClouds('assets/textures/particles/snowflake2.png');
+        this.createPointClouds('assets/textures/particles/snowflake3.png');
+        this.createPointClouds('assets/textures/particles/snowflake5.png');
+    }
+
+    createPointClouds(url) {
+        let geometry = new THREE.Geometry();
+
+        let range = 40;
+
+        for (let i = 0; i < 50; i++) {
+            let particle = new THREE.Vector3(
+                Math.random() * range - range / 2,
+                Math.random() * range * 1.5,
+                Math.random() * range - range / 2);
+
+            particle.velocityY = 0.1 + Math.random() / 5;
+            particle.velocityX = (Math.random() - 0.5) / 3;
+            particle.velocityZ = (Math.random() - 0.5) / 3;
+            geometry.vertices.push(particle);
+        }
+
+        let color = new THREE.Color(0xffffff);
+
+        let hsl = { h: 0, s: 0, l: 0 };
+        color.getHSL(hsl);
+        color.setHSL(hsl.h, hsl.s, Math.random() * hsl.l);
+
+        let material = new THREE.PointsMaterial({
+            size: 10,
+            transparent: true,
+            opacity: 0.6,
+            map: new THREE.TextureLoader().load(url),
+            blending: THREE.AdditiveBlending,
+            depthWrite: false,
+            sizeAttenuation: true,
+            color: color
+        });
+
+        let points = new THREE.Points(geometry, material);
+        points.sortParticles = true;
+        this.add(points);
+    }
+
+    update() {
+        this.children.forEach(child => {
+            let vertices = child.geometry.vertices;
+
+            vertices.forEach(v => {
+                v.y = v.y - v.velocityY;
+                v.x = v.x - v.velocityX;
+                v.z = v.z - v.velocityZ;
+
+                if (v.y <= 0) v.y = 60;
+                if (v.x <= -20 || v.x >= 20) v.velocityX = v.velocityX * -1;
+                if (v.z <= -20 || v.z >= 20) v.velocityZ = v.velocityZ * -1;
+            });
+
+            child.geometry.verticesNeedUpdate = true;
+        });
+    }
+}
+
+export default Snow;
\ No newline at end of file