Corridor multifrustum issue

[pjcozzi]

Sandcastle code (existing example):

    var positions = ellipsoid.cartographicArrayToCartesianArray([
        Cesium.Cartographic.fromDegrees(-120.0, 45.0),
        Cesium.Cartographic.fromDegrees(-125.0, 50.0),
        Cesium.Cartographic.fromDegrees(-125.0, 55.0)
    ]);
    var width = 100000;
    var corridorFill = new Cesium.GeometryInstance({
        geometry: new Cesium.CorridorGeometry({
            positions : positions,
            width : width,
            vertexFormat : Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
            height: 700000
        }),
        attributes : {
            color : Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({alpha : 1.0}))
        }
    });

Depending on the view, the corridor is not shown in the closer frustum:

Most likely the bounding sphere is wrong. Use command. debugShowBoundingVolume in the primitive to debug.

This doesn't need to holdup b20.

[bagnell]

@pjcozzi I think @hpinkos fixed this in #1099. Could you check? I wasn't able to reproduce the issue.

[hpinkos]

yeah, the bounding sphere was incorrect before so if that was the cause of the issues it should be fixed now.

[pjcozzi]

Looks good.