Threejs: Rotate sphere(globe) to another point(city) on the sphere itself

时光毁灭记忆、已成空白 提交于 2020-01-05 08:52:06

问题


I'm building a globe(sphere geometry) with set of predefined locations on geo-mapped and drawn as point(sphere geometry). I would like to focus(moving one location to another) those locations by rotating globe along y-axis. I tried the following code, seems not working for all locations.

location.geometry.computeBoundingBox();
var position = new THREE.Vector3();
position.subVectors( location.geometry.boundingBox.max, location.geometry.boundingBox.min );
position.multiplyScalar( 0.20 );
position.sub( location.geometry.boundingBox.min );
location.matrixWorld.multiplyVector3( position );
var point1 = scene.clone().position;
var point2 = position;
var distance = point1.distanceTo( point2 );
locationCollection.rotation.y = distance;

I think, I don't understand the concept enough. Hopefully, I will get some idea from the community.

Fiddle


回答1:


var c = group.rotation.y;
var d = -b * (Math.PI / 180)%(2 * Math.PI);
var e = Math.PI / 2 * -1;
group.rotation.y = c % (2 * Math.PI);
group.rotation.x = a * (Math.PI / 180) % Math.PI;
group.rotation.y= d+e;

where a= latitude, b= longitude,group=Object3D(or sphere)



来源:https://stackoverflow.com/questions/17474185/threejs-rotate-sphereglobe-to-another-pointcity-on-the-sphere-itself

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