topic arcgis for js externalRenderers + threejs in ArcGIS JavaScript Maps SDK Questions https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/arcgis-for-js-externalrenderers-threejs/m-p/725326#M67347 <HTML><HEAD></HEAD><BODY><P>Hi! Using the ArcGIS for JavaScript API 4.2。 externalRenderers exist Precision issues。 When zooming the view beyond a certain scale, geometries will appear to wobble or jitter。<BR /><A href="https://developers.arcgis.com/javascript/latest/api-reference/esri-views-3d-externalRenderers.html">https://developers.arcgis.com/javascript/latest/api-reference/esri-views-3d-externalRenderers.html</A></P><P style="color: #4c4c4c; margin: 0.625rem 0px;">”However, WebGL does not support 64 bit floating point arithmetic. A simple way to work around this limitation is to render scenes with a local origin:</P><UL style="color: #4c4c4c; font-size: 0.9375rem; margin-left: 0.775rem; margin-bottom: 1.55rem;"><LI style="margin: 0.3875rem 0px 0.3875rem 1.5rem;">Pick a local origin position, approximately at the center of your data.</LI><LI style="margin: 0.3875rem 0px 0.3875rem 1.5rem;">Subtract the local origin position from all positional data (vertex data, uniforms, etc.) before passing it into WebGL.</LI><LI style="margin: 0.3875rem 0px 0.3875rem 1.5rem;">Also subtract the local origin from the translational part of the view transformation matrix.“</LI></UL><P><BR />The above page gives the webgl solution, there are examples of threejs do?<BR />&nbsp;thank</P></BODY></HTML> Thu, 09 Feb 2017 08:51:15 GMT zhaohui 2017-02-09T08:51:15Z arcgis for js externalRenderers + threejs https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/arcgis-for-js-externalrenderers-threejs/m-p/725326#M67347 <HTML><HEAD></HEAD><BODY><P>Hi! Using the ArcGIS for JavaScript API 4.2。 externalRenderers exist Precision issues。 When zooming the view beyond a certain scale, geometries will appear to wobble or jitter。<BR /><A href="https://developers.arcgis.com/javascript/latest/api-reference/esri-views-3d-externalRenderers.html">https://developers.arcgis.com/javascript/latest/api-reference/esri-views-3d-externalRenderers.html</A></P><P style="color: #4c4c4c; margin: 0.625rem 0px;">”However, WebGL does not support 64 bit floating point arithmetic. A simple way to work around this limitation is to render scenes with a local origin:</P><UL style="color: #4c4c4c; font-size: 0.9375rem; margin-left: 0.775rem; margin-bottom: 1.55rem;"><LI style="margin: 0.3875rem 0px 0.3875rem 1.5rem;">Pick a local origin position, approximately at the center of your data.</LI><LI style="margin: 0.3875rem 0px 0.3875rem 1.5rem;">Subtract the local origin position from all positional data (vertex data, uniforms, etc.) before passing it into WebGL.</LI><LI style="margin: 0.3875rem 0px 0.3875rem 1.5rem;">Also subtract the local origin from the translational part of the view transformation matrix.“</LI></UL><P><BR />The above page gives the webgl solution, there are examples of threejs do?<BR />&nbsp;thank</P></BODY></HTML> Thu, 09 Feb 2017 08:51:15 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/arcgis-for-js-externalrenderers-threejs/m-p/725326#M67347 zhaohui 2017-02-09T08:51:15Z