要向3D汽车模型添加平滑过渡,可以使用THREE.JS中的插值器(interpolator)来实现。插值器可以在两个关键帧之间进行插值计算,从而实现平滑过渡效果。
以下是一种使用THREE.JS向3D汽车模型添加平滑过渡的方法:
<script src="https://cdn.jsdelivr.net/npm/three@0.132.2/build/three.min.js"></script>
<script src="path/to/your/model.js"></script>
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
var loader = new THREE.JSONLoader();
loader.load('path/to/your/car.json', function(geometry, materials) {
var material = new THREE.MeshFaceMaterial(materials);
var car = new THREE.Mesh(geometry, material);
scene.add(car);
});
var keyframes = [
{ position: new THREE.Vector3(0, 0, 0), rotation: new THREE.Euler(0, 0, 0) },
{ position: new THREE.Vector3(5, 0, 0), rotation: new THREE.Euler(0, Math.PI / 2, 0) },
{ position: new THREE.Vector3(5, 5, 0), rotation: new THREE.Euler(0, Math.PI, 0) },
{ position: new THREE.Vector3(0, 5, 0), rotation: new THREE.Euler(0, -Math.PI / 2, 0) },
{ position: new THREE.Vector3(0, 0, 0), rotation: new THREE.Euler(0, 0, 0) }
];
var duration = 5; // 动画持续时间(秒)
var interpolation = THREE.InterpolateSmooth; // 平滑插值器
var animate = function() {
var time = Date.now() * 0.001 % duration;
var keyframe = Math.floor(time / duration * keyframes.length);
var nextKeyframe = (keyframe + 1) % keyframes.length;
var position = keyframes[keyframe].position;
var nextPosition = keyframes[nextKeyframe].position;
var rotation = keyframes[keyframe].rotation;
var nextRotation = keyframes[nextKeyframe].rotation;
car.position.copy(position).lerp(nextPosition, interpolation(time / duration));
car.rotation.copy(rotation).slerp(nextRotation, interpolation(time / duration));
requestAnimationFrame(animate);
renderer.render(scene, camera);
};
animate();
通过以上步骤,你可以使用THREE.JS向3D汽车模型添加平滑过渡效果。在关键帧动画中,你可以定义多个关键帧,每个关键帧包含位置和旋转信息。插值器会根据时间的流逝在关键帧之间进行插值计算,从而实现平滑过渡效果。
请注意,以上代码仅为示例,实际使用时需要根据你的模型和需求进行适当的修改。
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