babylon.js怎么鼠标点击后获取当前的位置和角度
时间: 2024-05-15 08:18:10 浏览: 22
你可以通过在场景中添加一个事件侦听器,然后在事件处理程序中使用raycasting技术来获取鼠标点击位置和角度。具体来说,可以使用以下代码:
```
var canvas = document.getElementById('renderCanvas'); // 获取Canvas对象
var engine = new BABYLON.Engine(canvas, true); // 创建Babylon.js引擎
var scene = createScene(); // 创建场景
// 添加鼠标点击事件
canvas.addEventListener("pointerdown", function (event) {
// 计算出鼠标点击位置
var pickResult = scene.pick(scene.pointerX, scene.pointerY);
// 判断是否点中物体
if (pickResult.hit) {
var selectedObject = pickResult.pickedMesh; // 获取选中的物体
// 计算出鼠标点击位置和相机的角度
var cameraPosition = scene.activeCamera.position;
var cameraRotation = scene.activeCamera.rotation;
var pickPosition = pickResult.pickedPoint;
var pickAngle = BABYLON.Vector3.Normalize(pickPosition.subtract(cameraPosition));
console.log('选中的物体: ' + selectedObject.name);
console.log('鼠标点击位置: ' + pickPosition);
console.log('相机角度: ' + cameraRotation);
console.log('选中物体的角度: ' + pickAngle);
}
});
// 渲染场景
engine.runRenderLoop(function () {
scene.render();
});
// 创建场景的函数
function createScene() {
var scene = new BABYLON.Scene(engine);
// 添加相机
var camera = new BABYLON.FreeCamera("Camera", new BABYLON.Vector3(0, 5, -10), scene);
camera.setTarget(BABYLON.Vector3.Zero());
camera.attachControl(canvas, true);
// 添加灯光
var light = new BABYLON.HemisphericLight("light", new BABYLON.Vector3(0, 1, 0), scene);
light.intensity = 0.7;
// 添加网格
var sphere = BABYLON.MeshBuilder.CreateSphere("sphere", {diameter: 2}, scene);
return scene;
}
```