Zoom error with globe disabled and viewing model from below

[dminor112]

1. View tileset from below
2. Try to zoom on.

var viewer = new Cesium.Viewer('cesiumContainer', {
	timeline:false,
	animation:false,
	vrButton:false,
	sceneModePicker:false,
	infoBox:true,
    skyBox: false,
	scene3DOnly:true
});
viewer.scene.globe = undefined;

var tileset = viewer.scene.primitives.add(new Cesium.Cesium3DTileset({
  url: '../../../../Apps/SampleData/Cesium3DTiles/Classification/Photogrammetry/tileset.json',
  maximumScreenSpaceError : 1.0,
  maximumMemoryUsage: 4096 // GPU Memory
}));	
tileset.readyPromise.then(function(tileset) {
  viewer.zoomTo(tileset, new Cesium.HeadingPitchRange(0, -1.0, 0));
});

viewer.homeButton.viewModel.command.beforeExecute.addEventListener(function(commandInfo) {
	// Fly to custom position
	viewer.camera.flyToBoundingSphere(tileset.boundingSphere);
	// Tell the home button not to do anything
	commandInfo.cancel = true;
});

[hpinkos]

Thanks for reporting this @dminor112
Can you put together a Sandcastle example to reproduce this?

[dminor112]

@hpinkos demo: https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/#c=dVRdb9swDPwrQl7qAKmcoMOApWmxtum2bi0aLGn3MO9BsZlYmz4MiXbjDvvvo+wkczoU8Iso8kTeHZ2YSjiG4JyQ5s5moDw7Y1fgZal56kAgTGElSoWLNmfmbCUzcI8Sntr8qH+aNCgVhcBRuYGnHcRjE4uO0uZ4ZQ0SBrijAfudmARRalAUGK+E8jAIIWGkFiit6cQqd1kiHoR8CgZCAzOZ/gLXuZFmZS/tZoyu7KSeTO+Nqv8F8bVxxodstAigIEXIXuPgRc330Q/G4pjNmzI2X3xhuVznxw78LjExfxraGno4bBBMFm05a4Pt4WS6kAr8jfEFQVl3JzfSdCqb2fha2SXwDArMF+DxYk0v+J1iJEhDDhW1OmFABKT4AUjhpJYoK/BcZFnUEfGgFcCIpGOsdDT2Eefx/rsoCh/PhS4UTAWK+KAsvlLCe7mSaSNuPMst2rUTWgO6Ot72xH96a44GAV+LjdSlnpMJwcwLkcK1c9axMRvxYTfjDrR19YMXaxizN8N3bwP1H2cPrL0ITBNhmJjdG+TqrCYNtfTAMQcTrUqThq6ibUqfNSNu6Xm2Vi/s7m7QtfcngpJmPZOY5l+FWUM0HLDj0CAb9vsBQ1mRfRN1MHlUFPCZ5hv1t+rvVcythtbhjfiNi3hqtRYm40tYWQfXG0hLhCDNdQUGb6Unz9Bq7Xvf5t+Q/fvtdhEPH1TN0LK09Gg1K6yXIbfZqfbpVGhwgq9UvaCtKU0YZ17k4GA3MF8ehJvGA/QClGJEHwvds2XTPjMWw3uZZcLUmFNVyO60Rg+aFBSZL6zi6Z6J3qA38VgrOA+sMfZe6sI6DDaLyFsIZCv6Gfl4WdK+I0+9D4WTeFc0yWTFZHaW9F78a5IeS4P36GZVKjWXz5D0zicx5R+UBaWo3/sKnBJ1SMlH57dtkHM+ien4fxVaq5bCdRD/Ag

1. Turn the model to this angle, look from its bottom.
   
2. roll the middle wheel of the mouse, the model will keep move away.

You may have to try it multiple times until the problem occurs.

[hpinkos]

Thanks for the example @dminor112, but I still wasn't able to reproduce this. From that view, is the camera underground? Do you have the globe turned off?

[dminor112]

Thanks for the example @dminor112, but I still wasn't able to reproduce this. From that view, is the camera underground? Do you have the globe turned off?

Sorry, I copyed a rong address, Please use this demo:https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/#c=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

I use option 'imageryProvider: function () { }' to close the map so the problem will be more easier
reproduced.

[hpinkos]

Thanks @dminor112, I see it now.

@bagnell any ideas here?

[hpinkos]

Marking this priority - high because it also effects the asset preview window for tilesets that haven't been positioned on cesium.com0

[lilleyse]

I updated the sandcastle so it's a bit easier to trigger the bug: Sandcastle

I may look into this as part of other camera fixes. A similar problem happens when zooming to terrain when viewing it from underground.