Disabling Ambient Shadows and Edges While Interacting

---

How to preserve interactivity when viewing large models with ambient shadows and enhanced edges.

let timeoutDuration = 150; // Milliseconds
let timer = timeoutDuration;
let culling = false;

myViewer.scene.camera.on("matrix", () => {
    timer = timeoutDuration;
    if (!culling) {

        cullEntities({
            minComplexity: 409,
            maxSize: 14,
        });

        culling = true;
    }
});

myViewer.scene.on("tick", (tickEvent) => {  // Milliseconds
    if (!culling) {
        return;
    }
    timer -= tickEvent.deltaTime;
    if (timer <= 0) {
        if (culling) {

            uncullEntities();

            culling = false;
        }
    }
});

function cullEntities( params) {
    const objectIds = myViewer.scene.objectIds;
    const entities = myViewer.scene.objects;

    const minComplexity = params.minComplexity;
    const maxSize = params.maxSize;

    for (var i = 0, len = objectIds.length; i < len; i++) {
        const objectId = objectIds[i];
        const entity = entities[objectId];
        if (entity) {
            const entityComplexity = entity.numTriangles;
            const entitySize = math.getAABB3Diag(entity.aabb);

            const culled = (
              (minComplexity <= entityComplexity) ||
              (entitySize <= maxSize)
            );

            entity.culled = culled;
        }
    }
}

function uncullEntities() {
    const objectIds = myViewer.scene.objectIds;
    const entities = myViewer.scene.objects;

    for (var i = 0, len = objectIds.length; i < len; i++) {
        const objectId = objectIds[i];
        const entity = entities[objectId];
        if (entity) {
            entity.culled = false;
        }
    }
}