three.js 相机缓慢拖动
时间: 2023-07-21 19:45:14 浏览: 41
如果你想让three.js的相机缓慢拖动,可以使用以下代码:
首先,定义一些变量:
```javascript
var mouseDown = false;
var mouseX = 0;
var mouseY = 0;
var lastMouseX = 0;
var lastMouseY = 0;
var cameraRotationSpeed = 0.5;
```
然后,在鼠标按下和移动事件中,记录鼠标的位置和状态:
```javascript
document.addEventListener('mousedown', function(event) {
event.preventDefault();
mouseDown = true;
lastMouseX = event.clientX;
lastMouseY = event.clientY;
});
document.addEventListener('mousemove', function(event) {
event.preventDefault();
if (mouseDown) {
mouseX = event.clientX;
mouseY = event.clientY;
}
});
document.addEventListener('mouseup', function(event) {
event.preventDefault();
mouseDown = false;
});
```
最后,在渲染循环中,根据鼠标的位置和状态更新相机的位置:
```javascript
function render() {
if (mouseDown) {
var deltaX = mouseX - lastMouseX;
var deltaY = mouseY - lastMouseY;
camera.rotation.y -= deltaX * cameraRotationSpeed;
camera.rotation.x -= deltaY * cameraRotationSpeed;
lastMouseX = mouseX;
lastMouseY = mouseY;
}
renderer.render(scene, camera);
requestAnimationFrame(render);
}
```
这样就可以实现相机缓慢拖动的效果了。