Zoom is slower when close to a model · CesiumGS/cesium#5131

(5 comments) (0 reactions) (0 assignees)JavaScript (11,758 stars) (3,324 forks)batch import

category - cameragood first issuetype - enhancement

説明

Reported in the forum here: http://cesiumjs.org/forum.html#!msg/cesium-dev/C_OT9kB9RV8/-zlIMRjWCAAJ

Zooming is slower when the camera is close-ish to a model. Possibly not the proximity to the model, but the fact that the model is "in the center" of the view.

http://cesiumjs.org/Cesium/Apps/Sandcastle/?src=Hello%20World.html&label=Showcases&gist=a4bc90cb451cc3c997566e34a655c5ca

if you change the value of latOffsetin getPositionCentered() you will notice the difference.

コントリビューターガイド

技術スタック: javascript
領域: performance
Issue 種別: bug
難度: 3
推定時間: half day
活動状況: stale
明確さ: mostly clear
前提条件: Familiarity with CesiumWebGL rendering conceptsPerformance profiling tools
初心者向け度: 25
調査方針: Reproduce the slowdown using the Sandcastle example with latOffset parameter. Profile the rendering pipeline with browser tools to identify the bottleneck. Investigate the camera zoom logic in Cesium's source and check if the model is causing excessive draw calls or frustum calculations.