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echarts-bird.html
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echarts-bird.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/echarts.min.js"></script>
</head>
<body>
<style>
#main {
width: 700px;
height: 400px;
background: url('./bg.jpg');
background-size:700px 400px;
margin: 60px auto;
}
.btn {
margin: 0 auto;
width: 80px;
font-weight: bold;
color: #526ecc;
}
</style>
<div id="main"></div>
<div class="btn" onclick="startGame()">开始游戏</div>
<p style="text-align: center">（点击空格向上飞行）</p>
<script type="text/javascript">
// 基于准备好的dom，初始化echarts实例
const myChart = echarts.init(document.getElementById('main'));
const minHeight = 20;
let obstacleData = [];
let option;
let a = 0.05;
let vh = 0;
let vw = 0.5
let timer;
let score = 0;
let isGameStarted = false;
function startGame() {
if(isGameStarted) {
return;
}
isGameStarted = true;
a = 0.05;
vh = 0;
vw = 0.5
score = 0;
myChart.clear();
initObstacleData();
initOption();
initAnimation();
}
function initObstacleData() {
let start = 150;
obstacleData = [];
for (let index = 0; index < 50; index++) {
const height = Math.random() * 30 + minHeight;
const obstacleStart = Math.random() * (90 - minHeight);
obstacleData.push(
[
start + 50 * index,
obstacleStart,
obstacleStart + height > 100 ? 100 : obstacleStart + height
]
)
}
}
function judgeCollision(centerCoord) {
if (centerCoord[1] < 0 || centerCoord[1] > 100) {
return true;
}
let coordList = [
[centerCoord[0] + 15, centerCoord[1] + 1.5],
[centerCoord[0] + 15, centerCoord[1] - 1.5],
]
for (let i = 0; i < 2; i++) {
const coord = coordList[i];
const index = coord[0] / 50;
if (index % 1 < 0.6 && obstacleData[Math.floor(index) - 3]) {
if (obstacleData[Math.floor(index) - 3][1] > coord[1] || obstacleData[Math.floor(index) - 3][2] < coord[1]) {
return true;
}
score = (Math.floor(index) - 2) * 2
}
}
return false
}
function initOption() {
option = {
xAxis: {
show: false,
type: 'value',
min: 0,
max: 200,
},
yAxis: {
show: false,
min: 0,
max: 100
},
grid: {
top: 0,
bottom:0,
left: 0,
right: 0
},
backgroundcolor: 'trans',
series: [
{
name: 'bird',
type: 'scatter',
symbolSize: 50,
symbolRotate: 45,
symbol: 'image://bird.png',
data: [
[50, 80]
],
animation: false
},
{
name: '障碍物',
type: 'custom',
data: [...obstacleData],
itemStyle: {
color: {
type: 'linear',
x: 0,
y: 0,
x2: 1,
y2: 0,
colorStops: [{
offset: 0, color: '#ddf38c' // 0% 处的颜色
}, {
offset: 1, color: '#587d2a' // 100% 处的颜色
}],
global: false // 缺省为 false
},
borderWidth: 3
},
renderItem: function (params, api) {
let start1 = api.coord([api.value(0) - 10, api.value(1)]);
let start2 = api.coord([api.value(0) - 10, 100]);
let startHead1 = api.coord([api.value(0) - 12, api.value(1)]);
let startHead2 = api.coord([api.value(0) - 12, api.value(2) + 8])
let headSize = api.size([24, 8])
let rect = api.size([20, api.value(1)]);
let rect2 = api.size([20, 100 - api.value(2)]);
const common = {
x: params.coordSys.x,
y: params.coordSys.y,
width: params.coordSys.width,
height: params.coordSys.height
}
const rectShape = echarts.graphic.clipRectByRect(
{
x: start1[0],
y: start1[1],
width: rect[0],
height: rect[1]
},common
);
const rectHeadShape = echarts.graphic.clipRectByRect(
{
x: startHead1[0],
y: startHead1[1],
width: headSize[0],
height: headSize[1]
},common
);
const rectHeadShape2 = echarts.graphic.clipRectByRect(
{
x: startHead2[0],
y: startHead2[1],
width: headSize[0],
height: headSize[1]
},common
);
const rectShape2 = echarts.graphic.clipRectByRect(
{
x: start2[0],
y: start2[1],
width: rect2[0],
height: rect2[1]
},
common
)
return {
type: 'group',
children: [{
type: 'rect',
shape: rectShape,
style: {
...api.style(),
lineWidth: 1,
stroke: '#000'
}
}, {
type: 'rect',
shape: rectShape2,
style: {
...api.style(),
lineWidth: 1,
stroke: '#000'
}
},
{
type: 'rect',
shape: rectHeadShape,
style: {
...api.style(),
lineWidth: 1,
stroke: '#000'
}
},
{
type: 'rect',
shape: rectHeadShape2,
style: {
...api.style(),
lineWidth: 1,
stroke: '#000'
}
}]
};
},
}
]
};
}
function initAnimation() {
// 动画设置
timer = setInterval(() => {
// 小鸟速度和仰角调整
vh = vh - a;
option.series[0].data[0][1] += vh;
option.series[0].data[0][0] += vw;
option.series[0].symbolRotate = option.series[0].symbolRotate ? option.series[0].symbolRotate - 5 : 0;
// 坐标系范围调整
option.xAxis.min += vw;
option.xAxis.max += vw;
// 碰撞判断
const result = judgeCollision(option.series[0].data[0])
if(result) {
endAnimation();
}
myChart.setOption(option);
}, 25);
}
function endAnimation() {
option.series[0].symbolRotate = 180;
myChart.setOption(option);
clearInterval(timer);
isGameStarted = false;
setTimeout(() => {
alert(`最终得分： ${score}`)
});
}
document.onkeydown = function(e) {
if (e.code === 'Space') {
vh += 1;
option.series[0].symbolRotate = 45
}
}
</script>
</body>
</html>