69 lines
2.8 KiB
JavaScript
69 lines
2.8 KiB
JavaScript
import { Raycaster, Vector3 } from "three"
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class Draggable{
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constructor(engine, defaultDistance){
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const objects = [];
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const raycaster = new Raycaster();
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let v = new Vector3(), cv = new Vector3();
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let dragging = null;
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this.add = function(object, dragZone, fn, distance){
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objects.push(object);
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object._draggable = {fn, dragZone, distance: (distance || defaultDistance) * engine.scale}
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}
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this.remove = function(object){
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delete object._draggable;
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objects.splice(objects.indexOf(object), 1);
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}
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this.handleController = function(controller, action){
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raycaster.setFromXRController(controller);
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this.handle(action);
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}
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this.handleMouse = function (mouse, action) {
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raycaster.setFromCamera(mouse, engine.camera);
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this.handle(action);
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};
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this.handle = function(action){
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if (['start', 'selectstart'].includes(action)){
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let forExecute = [];
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engine.cameraWorld.getWorldPosition(cv);
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objects.filter(o=>{
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do {
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if (o.__active === false || o.visible === false) return false;
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o = o.parent;
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} while (o);
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return true;
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}).forEach(o=>{
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o.getWorldPosition(v);
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if (cv.distanceTo(v) <= o._draggable.distance){
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const intersects = raycaster.intersectObject(o);
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if (intersects[0]) forExecute.push({o, i:intersects[0]})
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}
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});
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if (forExecute[0]) {
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let s = forExecute.sort((a,b)=>a.i.distance-b.i.distance)[0];
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s.o._draggable.fn.start && s.o._draggable.fn.start(s.i);
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dragging = s;
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dragging.zone = raycaster.intersectObject(s.o._draggable.dragZone)[0];
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}
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}else if (['end', 'selectend'].includes(action) && dragging){
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dragging.o._draggable.fn.end && dragging.o._draggable.fn.end(dragging);
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dragging = null;
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}else if(['drag', 'move'].includes(action) && dragging){
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const intersect = raycaster.intersectObject(dragging.o._draggable.dragZone)[0];
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if (intersect?.uv && dragging.zone?.uv){
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dragging.o.position.x += -4*(dragging.zone.uv.x - intersect.uv.x);
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dragging.o.position.y += 4*(dragging.zone.uv.y - intersect.uv.y);
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dragging.o._draggable.fn.drag && dragging.o._draggable.fn.drag(dragging);
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dragging.zone = intersect;
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}
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}
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}
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}
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}
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export { Draggable } |