learning-threejs/chapter-07/06-rainy-scene.html at d74e13f6798df5ebd2f6e9acaf3af121f79ab596 · josdirksen/learning-threejs · GitHub

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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
<!DOCTYPE html>
<!--
BUGFIX
1. THREE.ParticleSystem(geom, material) => THREE.PointCloud(geom, material)
2. THREE.ParticleBasicMaterial(geom, material) => THREE.PointCloudMaterial(geom, material)
3. THREE.ImageUtils.loadTexture("../assets/textures/particles/raindrop-3.png") => THREE.ImageUtils.loadTexture("assets/textures/particles/raindrop-3.png"); // browser blocks non PWD XSS; firefox FIX only
-->
<html>

<head>
    <title>Example 07.06 - Particles - Rainy scene</title>
    <script type="text/javascript" src="../libs/three.js"></script>

    <script type="text/javascript" src="../libs/stats.js"></script>
    <script type="text/javascript" src="../libs/dat.gui.js"></script>
    <style>
        body {
            /* set margin to 0 and overflow to hidden, to go fullscreen */
            margin: 0;
            overflow: hidden;
            background-color: #000000;
        }
    </style>
</head>
<body>
<div id="Stats-output">
</div>
<!-- Div which will hold the Output -->
<div id="WebGL-output">
</div>

<!-- Javascript code that runs our Three.js examples -->
<script type="text/javascript">

    // once everything is loaded, we run our Three.js stuff.
    function init() {

        var stats = initStats();

        // create a scene, that will hold all our elements such as objects, cameras and lights.
        var scene = new THREE.Scene();

        // create a camera, which defines where we're looking at.
        var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 200);

        // create a render and set the size
        var webGLRenderer = new THREE.WebGLRenderer();
        webGLRenderer.setClearColor(new THREE.Color(0x000000, 1.0));
        webGLRenderer.setSize(window.innerWidth, window.innerHeight);

        // position and point the camera to the center of the scene
        camera.position.x = 20;
        camera.position.y = 40;
        camera.position.z = 110;
        camera.lookAt(new THREE.Vector3(20, 30, 0));

        // add the output of the renderer to the html element
        document.getElementById("WebGL-output").appendChild(webGLRenderer.domElement);

        var system1;
        var cloud;

        var controls = new function () {
            this.size = 3;
            this.transparent = true;
            this.opacity = 0.6;
            this.color = 0xffffff;

            this.sizeAttenuation = true;

            this.redraw = function () {
                scene.remove(scene.getObjectByName("particles1"));
                scene.remove(scene.getObjectByName("particles2"));

                createPointCloud(controls.size, controls.transparent, controls.opacity, controls.sizeAttenuation, controls.color);
            };
        };

        var gui = new dat.GUI();
        gui.add(controls, 'size', 0, 20).onChange(controls.redraw);
        gui.add(controls, 'transparent').onChange(controls.redraw);
        gui.add(controls, 'opacity', 0, 1).onChange(controls.redraw);
        gui.addColor(controls, 'color').onChange(controls.redraw);
        gui.add(controls, 'sizeAttenuation').onChange(controls.redraw);

        controls.redraw();

        render();


        function createPointCloud(size, transparent, opacity, sizeAttenuation, color) {

            var texture = THREE.ImageUtils.loadTexture("assets/textures/particles/raindrop-3.png");
            var geom = new THREE.Geometry();

            var material = new THREE.PointCloudMaterial({//THREE.ParticleBasicMaterial({
                size: size,
                transparent: transparent,
                opacity: opacity,
                map: texture,
                blending: THREE.AdditiveBlending,
                sizeAttenuation: sizeAttenuation,
                color: color
            });


            var range = 40;
            for (var i = 0; i < 1500; i++) {
                var 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;
                geom.vertices.push(particle);
            }

            cloud = new THREE.PointCloud(geom, material);//THREE.ParticleSystem(geom, material);
            cloud.sortParticles = true;

            scene.add(cloud);
        }

        function render() {
            stats.update();
            var vertices = cloud.geometry.vertices;
            vertices.forEach(function (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;
            });

            requestAnimationFrame(render);
            webGLRenderer.render(scene, camera);
        }

        function initStats() {

            var stats = new Stats();
            stats.setMode(0); // 0: fps, 1: ms

            // Align top-left
            stats.domElement.style.position = 'absolute';
            stats.domElement.style.left = '0px';
            stats.domElement.style.top = '0px';

            document.getElementById("Stats-output").appendChild(stats.domElement);

            return stats;
        }


    }
    window.onload = init;
</script>
</body>
</html>