我有一个2D绘图,并且如果所有dbId与当前dbId相交,则需要从中提取属性。
那样的话就足够了:
function checkintersect(dbId1,dbId2){
return intersect ? true : false
}
我该怎么做?
尝试使用以下方法找到两个节点的2d边界(边界框):
function get2DBoundsSample( dbId,model,useInstancing ) {
//const it = model.getData().instanceTree;
const fragList = model.getFragmentList();
let bounds = new THREE.Box3();
let bc = new Autodesk.Viewing.Private.BoundsCallback( bounds );
const dbId2fragId = model.getData().fragments.dbId2fragId;
const fragIds = dbId2fragId[dbId];
if( Array.isArray( fragIds ) ) {
for( let i = 0; i < fragIds.length; i++ ) {
find2DBoundsSample( fragList,fragIds[i],dbId,useInstancing,bc );
}
} else if( typeof fragIds === 'number' ) {
find2DBoundsSample( fragList,fragIds,bc );
}
function find2DBoundsSample( fragList,fragId,bc ) {
const mesh = fragList.getVizmesh( fragId );
if(mesh.geometry){
const vbr = new Autodesk.Viewing.Private.VertexBufferReader( mesh.geometry,useInstancing );
vbr.enumGeomsForObject( dbId,bc );
}
else{
console.log('Mesh Geometry undefined. DBID: ',useInstancing);
}
}
return bc.bounds;
}
然后测试两个框是否与Box3.isIntersectionBox()
相交