CesiumGS/cesium

Create a sandcastle example showing how to do visibility testing with picking

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#5751 opened on Aug 14, 2017

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category - sandcastlegood first issue

Description

We end up referencing this thread a lot in the forum: https://groups.google.com/forum/#!searchin/cesium-dev/weak$20terrain%7Csort:relevance/cesium-dev/ZSGJAUqnGR0/2g_M-n5PCAAJ

Contains some nice starting points for sandcastle examples!

Contributor guide

Tech stack
javascript
Domain
frontenddocumentation
Issue type
documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
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.
mostly clear
Prerequisites
Cesium JavaScript APISandcastle demo frameworkCesium picking API
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Review existing sandcastle examples in `Apps/Sandcastle/gallery/` to understand the pattern. Then read the referenced forum thread for starting points on visibility testing with picking. Implement a demo that demonstrates picking an object and determining its visibility (e.g., using `scene.pick` and checking if the picked primitive is visible from the camera). Ensure the example is self contained and includes comments explaining the key steps.