好看的水滴登录页面

css 如何绘制水滴

• 可以通过box-shadow 来显示阴影
• 可以通过border-radius 改变水滴的形状
• 当然如果像要使其更加灵活，可以使用animation+keyframes关键帧+border-radius，让水滴动起来

是不是很简单

来吧展示效果

html代码，就只有一个div,然后使用一些伪类结合

<div class="water-container">
    <div class="water">div>
div>
1
2
3
4

css代码

.water-container {
    width: 50vw;
    height: 50vh;
    background-color: #eff0f4;
    display: flex;
    justify-content: center;
    align-items: center;
}

.water {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    box-shadow: inset 20px 20px 20px rgba(0, 0, 0, .05),
    25px 35px 20px rgba(0, 0, 0, .05),
    25px 30px 30px rgba(0, 0, 0, .05),
    inset -20px -20px 25px hsla(0, 0%, 100%, .9);
    position: relative;
}

.water::before {
    content: "";
    position: absolute;
    left: 24%;
    top: 25%;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
}
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

效果：

圆形水滴做好了，那我们是不是可以改变其现状呢，只要改变border-radius就可以了

.water {
    width: 120px;
    height: 120px;
    /*改变形状，使其弯曲*/
    border-radius: 30% 70% 70% 30% / 30% 35% 65% 70%;
    box-shadow: inset 20px 20px 20px rgba(0, 0, 0, .05),
    25px 35px 20px rgba(0, 0, 0, .05),
    25px 30px 30px rgba(0, 0, 0, .05),
    inset -20px -20px 25px hsla(0, 0%, 100%, .9);
    position: relative;
}
1
2
3
4
5
6
7
8
9
10
11

效果：

形状改变了，我们就让其动起来，动起来就算加上关键帧改变border-radius

.water {
  width: 120px;
  height: 120px;
  /*改变形状，使其弯曲*/
  border-radius: 30% 70% 70% 30% / 30% 35% 65% 70%;
  box-shadow: inset 20px 20px 20px rgba(0, 0, 0, .05),
  25px 35px 20px rgba(0, 0, 0, .05),
  25px 30px 30px rgba(0, 0, 0, .05),
  inset -20px -20px 25px hsla(0, 0%, 100%, .9);
  position: relative;
  /*添加动画关键帧*/
  animation: waterMove 4s linear infinite;
}

.water::before {
  content: "";
  position: absolute;
  left: 24%;
  top: 25%;
  width: 16px;
  height: 16px;
  background: #fff;
  border-radius: 30% 70% 70% 30% / 30% 35% 65% 70%;
  animation: waterMove 4s linear infinite;
}
/* 关键帧 */
@keyframes waterMove {
    20% {
        border-radius: 30% 70% 53% 47% / 28% 44% 56% 72%;
    }

    40% {
        border-radius: 30% 70% 39% 61% / 34% 39% 61% 66%;
    }

    60% {
        border-radius: 25% 75% 45% 55% / 40% 55% 45% 60%;
    }

    80% {
        border-radius: 28% 72% 31% 69% / 32% 39% 61% 68%;
    }
}
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

效果：

完成后我们就可以在这个水滴里面添加东西了，比如设计登录页面

 <div class="login-container">
    <div class="login-content">
      <div class="login-box">
        <form action="" class="login-form">
          <h2>LOGINh2>
          <div class="input-box">
            <input type="text" placeholder="用户名"/>
          div>
          <div class="input-box">
            <input type="password" placeholder="密码"/>
          div>
          <div class="input-box">
            <input type="submit" value="登录"/>
          div>
        form>
      div>
      <div class="login-btn forget-pwd">
        <span>忘记span>
        <span>密码span>
      div>
      <div class="login-btn register"><span>注册span>div>
    div>
  div>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

.login-container {
    width: 50vw;
    height: 50vh;
    background: #eff0f4;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0.9;
}

.login-content {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-box {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 350px;
    position: relative;
    width: 350px;
    border-radius: 52% 48% 33% 67% / 38% 45% 55% 62%;
    box-shadow: inset 20px 20px 20px rgba(0, 0, 0, .05),
    25px 35px 20px rgba(0, 0, 0, .05),
    25px 30px 30px rgba(0, 0, 0, .05),
    inset -20px -20px 25px hsla(0, 0%, 100%, .9);
    /*transition: .5s;*/
    animation: waterMove 9s linear infinite;
}

/* 关键帧 */
@keyframes waterMove {
    20% {
        border-radius: 30% 70% 53% 47% / 28% 44% 56% 72%;
    }

    40% {
        border-radius: 30% 70% 39% 61% / 34% 39% 61% 66%;
    }

    60% {
        border-radius: 25% 75% 45% 55% / 40% 55% 45% 60%;
    }

    80% {
        border-radius: 28% 72% 31% 69% / 32% 39% 61% 68%;
    }
}

.login-box::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 85px;
    width: 35px;
    height: 35px;
    background: #fff;
    border-radius: 52% 48% 33% 67% / 38% 45% 55% 62%;
    opacity: .9;
    animation: waterMove 9s linear infinite;
}

.login-box::after {
    content: '';
    top: 90px;
    position: absolute;
    left: 70px;
    width: 15px;
    height: 15px;
    border-radius: 52% 48% 33% 67% / 38% 45% 55% 62%;
    background: #fff;
    opacity: .9;
    animation: waterMove 9s linear infinite;
}

.login-form {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    padding: 40px;
    gap: 15px;
}

.login-form h2 {
    gap: 20px;
    letter-spacing: .3em;
}


.input-box {
    width: 225px;
    box-shadow: inset 2px 5px 10px rgba(0, 0, 0, .1),
    inset -2px -5px 10px rgba(255, 255, 255, 1),
    15px 15px 10px rgba(0, 0, 0, .05),
    15px 10px 15px rgba(0, 0, 0, .025);
    position: relative;
    border-radius: 25px;
}

.input-box:last-child {
    width: 120px;
    background: rgb(105, 199, 199);
    transition: .6s;
    box-shadow: inset 2px 5px 10px rgba(0, 0, 0, .1),
    15px 15px 10px rgba(0, 0, 0, .05),
    15px 10px 15px rgba(0, 0, 0, .025);
}

.input-box:last-child:hover {
    width: 150px;
}

.input-box::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 65%;
    height: 5px;
    background: rgba(255, 255, 255, .5);
    border-radius: 5px;
}

.input-box input {
    border: none;
    outline: none;
    background: transparent;
    width: 100%;
    font-size: 1em;
    padding: 10px 15px;
    box-sizing: border-box;
}

.input-box:last-child input {
    color: #fff;
    text-transform: uppercase;
    font-size: 1em;
    cursor: pointer;
    letter-spacing: .1em;
    font-weight: 500;
}

.login-btn {
    position: absolute;
    right: -120px;
    bottom: 0;
    width: 120px;
    height: 120px;
    background: #c61dff;
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    cursor: pointer;
    text-decoration: none;
    letter-spacing: .1em;
    font-size: 1em;
    transition: .25s;
    box-shadow: inset 10px 10px 10px rgba(190, 1, 254, .05),
    25px 35px 20px rgba(190, 1, 254, .1),
    25px 30px 30px rgba(190, 1, 254, .1),
    inset -10px -10px 15px rgba(255, 255, 255, .5);
    border-radius: 44% 56% 65% 35% / 57% 58% 42% 43%;
    user-select: none;
    animation: waterMove2 9s linear infinite;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 30px;
    width: 20px;
    height: 20px;
    border-radius: 44% 56% 35% / 57% 58% 42% 43%;
    background: #fff;
    opacity: .45;
}

.login-btn:hover, .login-btn:hover::before {
    border-radius: 50%;
}

.register {
    bottom: 150px;
    right: -120px;
    width: 80px;
    height: 80px;
    background: #01b4ff;
    border-radius: 49% 51% 52% 48% / 63% 59% 41% 37%;
    box-shadow: inset 10px 10px 10px rgba(1, 180, 255, .005),
    25px 35px 20px rgba(1, 180, 255, .1),
    25px 30px 30px rgba(1, 180, 255, .1),
    inset -10px -10px 15px rgba(255, 255, 255, .5);
}

.register::before {
    left: 20px;
    width: 15px;
    height: 15px;
    border-radius: 49% 51% 52% 48% / 63% 59% 41% 37%;
}


@keyframes waterMove2 {
    20% {
        border-radius: 44% 56% 65% 35% / 57% 58% 42% 43%;
    }

    40% {
        border-radius: 44% 56% 45% 45% / 67% 50% 46% 37%;
    }

    60% {
        border-radius: 39% 61% 70% 30% / 60% 68% 50% 43%;
    }

    80% {
        border-radius: 41% 58% 60% 40% / 52% 48% 70% 52%;
    }
}
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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228

效果展示：

在这基础上在增加 canvas 背景

背景图片

import bridge from "../../assets/bridge.png";

class WaterRipple {
    constructor(props) {
        this.init(props);
    }

    init(props) {
        this.boxRef = props.boxRef;
        this.canvas = props.canvas;
        this.ctx = this.canvas.getContext("2d", {willReadFrequently: true});
        this.width = this.canvas.width;
        this.height = this.canvas.height;

        //最大振幅
        this.max_amplitude = 1024;
        this.amplitude = props.amplitude || 512;

        this.background = props.background;
        this.load = false;

        this.img_data = null;
        this.new_img_data = null;
        this.animation_idx = null;

        this.mousemove_interval = props.mousemove_interval || 50;
        this.animation_interval = props.animation_interval || 20;
        //波纹圆角
        this.ripple_radius = props.ripple_radius || 3;

        this.bridge = new Image();
        this.bridge.src = bridge;

        if (props.resize) {
            this.setResize();
        }
    }

    drawBackGround() {
        if (this.background.complate) return;

        this.ctx.drawImage(this.background, 0, 0, this.width, this.height);
        this.img_data = this.ctx.getImageData(0, 0, this.width, this.height);
        this.new_img_data = this.ctx.getImageData(0, 0, this.width, this.height);

        this.buffer_1 = new Array(this.width).fill(0).map(() => new Array(this.height).fill(0));
        this.buffer_2 = new Array(this.width).fill(0).map(() => new Array(this.height).fill(0));

        this.load = true;
    }

    render() {
        if (!this.load) {
            this.drawBackGround();
            return;
        }

        const w = this.width;
        const h = this.height;
        const half_w = w >> 1;
        const half_h = h >> 1;
        const len = this.new_img_data.data.length;

        for (let i = 0; i < len; i += 4) {
            const buffer_idx = i >> 2;
            const x = buffer_idx % w;
            const y = (buffer_idx - x) / w;

            const left = Math.max(x - 1, 0);
            const right = Math.min(x + 1, w - 1);
            const top = Math.min(y + 1, h - 1);
            const bottom = Math.max(y - 1, 0);

            let next_amplitude =
                this.buffer_1[x][top] +
                this.buffer_1[x][bottom] +
                this.buffer_1[right][y] +
                this.buffer_1[left][y];
            next_amplitude >>= 1;
            next_amplitude -= this.buffer_2[x][y];
            next_amplitude -= next_amplitude >> 5;

            this.buffer_2[x][y] = next_amplitude;

            const ratio = (this.max_amplitude - next_amplitude) / this.max_amplitude;

            if (next_amplitude !== 0) {
                let offset_x = (((x - half_w) * ratio) << 0) + half_w;
                let offset_y = (((y - half_h) * ratio) << 0) + half_h;

                offset_x = Math.min(offset_x, w - 1);
                offset_x = Math.max(offset_x, 0);
                offset_y = Math.max(offset_y, 0);
                offset_y = Math.min(offset_y, h - 1);

                const img_data_idx = (offset_y * w + offset_x) << 2;
                const r = this.img_data.data[img_data_idx];
                const g = this.img_data.data[img_data_idx + 1];
                const b = this.img_data.data[img_data_idx + 2];

                this.new_img_data.data[i] = r;
                this.new_img_data.data[i + 1] = g;
                this.new_img_data.data[i + 2] = b;
            }
        }

        this.ctx.putImageData(this.new_img_data, 0, 0);
        this.ctx.drawImage(
            this.bridge,
            0,
            this.height * 0.35,
            this.width,
            this.height * 0.65
        );

        const temp_data = this.buffer_2;
        this.buffer_2 = this.buffer_1;
        this.buffer_1 = temp_data;
    }

    animate() {
        let start = new Date().getTime();
        const update = () => {
            const end = new Date().getTime();
            if (end - start > this.animation_interval) {
                this.render();
                start = end;
            }

            this.animation_idx = requestAnimationFrame(update);
        };
        update();
    }

    throttle(func, time) {
        let start = new Date().getTime();
        return function () {
            const end = new Date().getTime();
            if (end - start >= time) {
                start = end;
                func.apply(this, arguments);
            }
        };
    }

    ripple(x, y) {
        if (!this.load) return;
        const left = Math.max(x - this.ripple_radius, 0);
        const right = Math.min(x + this.ripple_radius, this.buffer_1.length - 1);
        const top = Math.max(y - this.ripple_radius, 0);
        const bottom = Math.min(
            y + this.ripple_radius,
            this.buffer_1[0].length - 1
        );

        for (let i = left; i < right; i++) {
            for (let j = top; j < bottom; j++) {
                this.buffer_1[i][j] = this.amplitude;
            }
        }
    }
   addMousemove() {
        this.canvas.addEventListener(
            "mousemove",
            this.throttle((e) => {
                const {top, left} = this.canvas.getBoundingClientRect();
                this.ripple(Math.floor(e.clientX - left), Math.floor(e.clientY - top));
            }, this.mousemove_interval)
        );
    }

    setResize() {
        window.addEventListener("resize", () => {
            const {offsetWidth, offsetHeight} = this.boxRef.value;
            this.canvas.width = offsetWidth;
            this.canvas.height = offsetHeight;

            this.width = this.canvas.width;
            this.height = this.canvas.height;

            this.load = false;
        });
    }
    stop() {
        cancelAnimationFrame(this.animation_idx);
    }

    resume() {
        this.animate();
    }
}

export default WaterRipple
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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193

<template>
  <div class="container" ref="boxRef">
    <canvas ref="canvasRef">canvas>
    <login-page>login-page>
  div>
template>

<script setup>
import WaterRipple from "@/components/FloatWater/floatWater.js";
import waterBg from '@/assets/water.png'
import {onMounted, onUnmounted, ref} from "vue";
import LoginPage from "@/components/LoginPage.vue";

let canvasWidth = 600;
let canvasHeight = 600;
let timer = null;
let waterRipple = null;

const boxRef = ref(null);
const canvasRef = ref(null);

onMounted(() => {
  if (boxRef.value && canvasRef.value) {
    const {offsetWidth, offsetHeight} = boxRef.value;
    canvasWidth = offsetWidth;
    canvasHeight = offsetHeight;
    canvasRef.value.width = canvasWidth;
    canvasRef.value.height = canvasHeight;

    const waterImg = new Image();
    waterImg.src = waterBg;
    waterRipple = new WaterRipple({
      canvas: canvasRef.value,
      background: waterImg,
      boxRef,
    })
    waterRipple.animate();

    timer = window.setInterval(() => {
      const x = Math.floor(canvasWidth * Math.random());
      const y = Math.floor(canvasHeight * Math.random())
      waterRipple?.ripple(x, y)
    }, 1000)


    waterRipple.addMousemove()
  }
})
onUnmounted(() => {
  timer && clearInterval(timer);
  waterRipple?.stop()
})

script>

<style scoped>

.container {
  boxSizing: border-box;
  width: 100vw;
  height: 100vh;
  display: flex;
  position: relative;
}

style>
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

效果展示：