CesiumGS/cesium

Disable the depth test when clamped to ground zooms to wrong location

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#5,957 opened on Nov 1, 2017

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category - sandcastlegood first issuetype - bug

Description

Select Disable the depth test when clamped to ground in http://localhost:8080/Apps/Sandcastle/index.html?src=Billboards.html&label=All and you'll be looking at the size of a mountain. You need to move the camera to see the billboard.

This is using the viewer.zoomTo, so maybe we introduced a bug when clamping to ground?

Contributor guide

Tech stack
javascript
Domain
frontend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
JavaScriptCesium basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
Investigate the viewer.zoomTo function and how it interacts with depth testing when objects are clamped to ground. Check the Sandcastle example at Apps/Sandcastle/index.html?src=Billboards.html. Look for recent changes in Camera.js or Scene.js that may have introduced this regression. Focus on the 'clamp to ground' behavior and the depth test disable option.