Cesium中如何添加gif
时间: 2023-12-05 18:50:27 浏览: 160
在Cesium中添加GIF可以通过以下步骤完成:
1. 导入Cesium和GIF库,例如:
```html
<script src="https://cesium.com/downloads/cesiumjs/releases/1.75/Build/Cesium/Cesium.js"></script>
<script src="https://cdn.jsdelivr.net/npm/gif.js/dist/gif.js"></script>
```
2. 创建一个GIF对象,设置GIF的参数,例如:
```javascript
var gif = new GIF({
workers: 2,
quality: 10,
width: 400,
height: 300
});
```
3. 将图像帧添加到GIF中,例如:
```javascript
gif.addFrame(canvas.getContext('2d'), {copy: true, delay: 200});
```
4. 当所有帧都添加到GIF中后,调用`gif.render()`方法生成GIF,例如:
```javascript
gif.render();
```
5. 将生成的GIF添加到Cesium场景中,例如:
```javascript
var entity = viewer.entities.add({
position: Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
billboard: {
image: gif.images[0],
scale: 1.0
}
});
```
完整代码示例:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Cesium GIF Example</title>
<style>
@import url(https://cesium.com/downloads/cesiumjs/releases/1.75/Build/Cesium/Widgets/widgets.css);
#cesiumContainer {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
overflow: hidden;
}
</style>
</head>
<body>
<div id="cesiumContainer"></div>
<script src="https://cesium.com/downloads/cesiumjs/releases/1.75/Build/Cesium/Cesium.js"></script>
<script src="https://cdn.jsdelivr.net/npm/gif.js/dist/gif.js"></script>
<script>
var viewer = new Cesium.Viewer('cesiumContainer');
var canvas = document.createElement('canvas');
canvas.width = 400;
canvas.height = 300;
var context = canvas.getContext('2d');
context.fillStyle = '#000';
context.fillRect(0, 0, canvas.width, canvas.height);
var gif = new GIF({
workers: 2,
quality: 10,
width: 400,
height: 300
});
for (var i = 0; i < 10; i++) {
context.fillStyle = '#fff';
context.fillRect(i * 40, 0, 40, 300);
gif.addFrame(context, {copy: true, delay: 200});
}
gif.render();
var entity = viewer.entities.add({
position: Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
billboard: {
image: gif.images[0],
scale: 1.0
}
});
</script>
</body>
</html>
```
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