在伪造查看器中恢复 sectionBox

Question

How to get bounding box info of intersection box in forge viewer? 我想恢复要恢复的部分扩展框边界值。对于下面的方法，我得到框值。 getSelectionbox

现在我想将其恢复到查看器/将保存的值设置为查看器，因为有什么方法可用吗？

我使用了 setSectionBox(box)，但它不适合我。

谢谢

这里是代码示例：

viewer.restoreState(currentState, null, false);

                viewer.hide(Object.values(val.hiddenNodes));
                if(Object.values(val.isolateNodes).length > 0){                     
                    viewer.isolate(Object.values(val.isolateNodes));
                }
                if(val.cutPlanes.length !== 0){
                    viewer.loadExtension("Autodesk.Section").then(function(sectionTool){
                        sectionTool.activate(val.sectionStyle);
                        
                        
                        var sectionTool = markupsExt.tool.getSectionBoxValues();

                        const sectionbboxmin = new THREE.Vector3(val.sectionBox[0], val.sectionBox[1], val.sectionBox[2]);      
                        const sectionbboxmax = new THREE.Vector3(val.sectionBox[3], val.sectionBox[4], val.sectionBox[5]);
                        const box = new THREE.Box3(sectionbboxmin,sectionbboxmax);
                        box.transform = val.sectionBoxTransform;
                        sectionTool.setSectionBox(box);
                    });
                }

Answer 1

我刚刚尝试使用以下代码 sn-p 将自定义截面框应用于 Forge Viewer 中的模型：

let box = new THREE.Box3(new THREE.Vector3(-100,-100,-100), new THREE.Vector3(100,100,100));
let sectionExt = viewer.getExtension('Autodesk.Section');
sectionExt.setSectionBox(box);

结果是这样的：

所以这似乎工作正常。您能否提供有关您如何尝试设置部分框的更多详细信息？

编辑：

您可以通过以下方式从剖切面列表中恢复剖面框（例如您可以从 viewer.getState() 获得的剖面框）：

function restoreSectionBox(viewer, cutplanes) {
    let box = new THREE.Box3();
    for (const cutplane of cutplanes) {
        const normal = new THREE.Vector3(cutplane[0], cutplane[1], cutplane[2]);
        const offset = cutplane[3];
        const pointOnPlane = normal.negate().multiplyScalar(offset);
        box.expandByPoint(pointOnPlane);
    }
    const sectionExt = viewer.getExtension('Autodesk.Section');
    sectionExt.setSectionBox(box);
}

// ...

let cutplanes = [
    [1, 0, 0, 40],
    [0, 1, 0, 50],
    [0, 0, 1, 30],
    [-1, 0, 0, 60],
    [0, -1, 0, 20],
    [0, 0, -1, 70]
];
restoreSectionBox(viewer, cutplanes);