相机面对选定的平面 three.js
camera to face selected plane three.js
我有 600 个平面以随机 x、y、z 位置添加到场景中,每个平面都是可点击的。单击时,我会为选定的平面设置动画。一切正常,但我正在努力让相机面对选定的平面/或确保平面在视图中居中。我尝试获取被点击项目的方向向量,但不确定如何确保相机始终保持一定距离。这是函数,下面是 link 进行测试。有任何想法吗?非常感谢
http://adigitalengagement.co.uk/webauth_stickies/plane/
function toObj(obj) {
var lookAtVector = new THREE.Vector3(0, 0, 1);
lookAtVector.applyQuaternion(obj.quaternion);
console.log(lookAtVector);
var rotateTween = new TWEEN.Tween(controls.target)
.to({
x: obj.position.x,
y: obj.position.y,
z: obj.position.z
}, 4000)
.interpolation(TWEEN.Interpolation.CatmullRom)
.easing(TWEEN.Easing.Quintic.InOut)
.start();
var goTween = new TWEEN.Tween(camera.position)
.to({
x: obj.position.x,
y: obj.position.y,
z: obj.position.z + 10
}, 4000)
.interpolation(TWEEN.Interpolation.CatmullRom)
.easing(TWEEN.Easing.Quintic.InOut);
goTween.start();
goTween.onComplete(function() {
console.log('done!');
});
}
我相信会有更好的解决方案,但这个可以作为基于 this SO answer 的起点。
我已经更改了您的 toObj()
函数并添加了一个全局变量:
var lookAtVector = new THREE.Vector3(0,0,0);
...
function toObj(obj) {
var normalMatrix = new THREE.Matrix3().getNormalMatrix( obj.matrixWorld );
var worldNormal = new THREE.Vector3(0,0,1).applyMatrix3( normalMatrix ).normalize();
var camPosition = new THREE.Vector3().copy(obj.position).add(worldNormal.multiplyScalar(100));
var rotateTween = new TWEEN.Tween(lookAtVector)
.to({
x: obj.position.x,
y: obj.position.y,
z: obj.position.z
}, 4000)
.easing(TWEEN.Easing.Quadratic.InOut)
.onUpdate(function(){
camera.lookAt(lookAtVector);
})
.onComplete(function(){
lookAtVector.copy(obj.position);
})
.start();
var goTween = new TWEEN.Tween(camera.position)
.to(camPosition, 4000)
.easing(TWEEN.Easing.Quadratic.InOut)
.start();
}
jsfiddle 例子
我有 600 个平面以随机 x、y、z 位置添加到场景中,每个平面都是可点击的。单击时,我会为选定的平面设置动画。一切正常,但我正在努力让相机面对选定的平面/或确保平面在视图中居中。我尝试获取被点击项目的方向向量,但不确定如何确保相机始终保持一定距离。这是函数,下面是 link 进行测试。有任何想法吗?非常感谢 http://adigitalengagement.co.uk/webauth_stickies/plane/
function toObj(obj) {
var lookAtVector = new THREE.Vector3(0, 0, 1);
lookAtVector.applyQuaternion(obj.quaternion);
console.log(lookAtVector);
var rotateTween = new TWEEN.Tween(controls.target)
.to({
x: obj.position.x,
y: obj.position.y,
z: obj.position.z
}, 4000)
.interpolation(TWEEN.Interpolation.CatmullRom)
.easing(TWEEN.Easing.Quintic.InOut)
.start();
var goTween = new TWEEN.Tween(camera.position)
.to({
x: obj.position.x,
y: obj.position.y,
z: obj.position.z + 10
}, 4000)
.interpolation(TWEEN.Interpolation.CatmullRom)
.easing(TWEEN.Easing.Quintic.InOut);
goTween.start();
goTween.onComplete(function() {
console.log('done!');
});
}
我相信会有更好的解决方案,但这个可以作为基于 this SO answer 的起点。
我已经更改了您的 toObj()
函数并添加了一个全局变量:
var lookAtVector = new THREE.Vector3(0,0,0);
...
function toObj(obj) {
var normalMatrix = new THREE.Matrix3().getNormalMatrix( obj.matrixWorld );
var worldNormal = new THREE.Vector3(0,0,1).applyMatrix3( normalMatrix ).normalize();
var camPosition = new THREE.Vector3().copy(obj.position).add(worldNormal.multiplyScalar(100));
var rotateTween = new TWEEN.Tween(lookAtVector)
.to({
x: obj.position.x,
y: obj.position.y,
z: obj.position.z
}, 4000)
.easing(TWEEN.Easing.Quadratic.InOut)
.onUpdate(function(){
camera.lookAt(lookAtVector);
})
.onComplete(function(){
lookAtVector.copy(obj.position);
})
.start();
var goTween = new TWEEN.Tween(camera.position)
.to(camPosition, 4000)
.easing(TWEEN.Easing.Quadratic.InOut)
.start();
}
jsfiddle 例子