czml

How to draw custom dynamic billboards in Cesium.js

由 大城市里の小女人 提交于 2020-01-02 10:21:50
问题 I'm currently using Cesium for a mapping application, and I have a requirement to have status indicators for each item I'm plotting (for example, if the item I'm plotting is an airplane, then I need to have a fuel status indicator). I can't use Cesium's drawing tools to do this because they are drawn using geographic locations, but I need my status indicators to simply be located near the billboard and not get farther away from the billboard as users zoom in and out. Cesium's CZML

How to draw custom dynamic billboards in Cesium.js

由 人走茶凉 提交于 2020-01-02 10:21:48
问题 I'm currently using Cesium for a mapping application, and I have a requirement to have status indicators for each item I'm plotting (for example, if the item I'm plotting is an airplane, then I need to have a fuel status indicator). I can't use Cesium's drawing tools to do this because they are drawn using geographic locations, but I need my status indicators to simply be located near the billboard and not get farther away from the billboard as users zoom in and out. Cesium's CZML

Cesium czml change orientation of 3d model (gltf/glb) along with position in time

由 空扰寡人 提交于 2019-12-23 13:01:20
问题 I have implemented a 3d model (cesium air) aircraft to move along a path. Its position is being changed based on time and the detailed data is available in the czml file under position attribute. However, I am not able to change the orientation of the aircraft along with path. The aircraft flies through the path but its heading , pitch and roll are constant. It does not pitch up with increase in height etc. How to implement the attitude changes using orientation attribute in the czml file or

How do I convert a geodetic location to an ECF position that works with the terrain model in Cesium

由 妖精的绣舞 提交于 2019-12-21 05:48:14
问题 I'm trying to put a point at the top of Mount Everest in Cesium. My most likely candidate as of last night was the code I borrowed to do geodetic to ecef conversion (from PySatel.coord). Upon review this morning, it appears to be correct: a = 6378.137 b = 6356.7523142 esq = 6.69437999014 * 0.001 e1sq = 6.73949674228 * 0.001 f = 1 / 298.257223563 def geodetic2ecef(lat, lon, alt): """Convert geodetic coordinates to ECEF. Units are degrees and kilometers. """ lat, lon = radians(lat), radians(lon

How to draw custom dynamic billboards in Cesium.js

由 ╄→尐↘猪︶ㄣ 提交于 2019-12-06 05:36:36
I'm currently using Cesium for a mapping application, and I have a requirement to have status indicators for each item I'm plotting (for example, if the item I'm plotting is an airplane, then I need to have a fuel status indicator). I can't use Cesium's drawing tools to do this because they are drawn using geographic locations, but I need my status indicators to simply be located near the billboard and not get farther away from the billboard as users zoom in and out. Cesium's CZML documentation states that the billboard's "image" property can take a data URI, so I figured the easiest way to

How do I convert a geodetic location to an ECF position that works with the terrain model in Cesium

由 家住魔仙堡 提交于 2019-12-03 17:12:54
I'm trying to put a point at the top of Mount Everest in Cesium . My most likely candidate as of last night was the code I borrowed to do geodetic to ecef conversion (from PySatel.coord). Upon review this morning, it appears to be correct: a = 6378.137 b = 6356.7523142 esq = 6.69437999014 * 0.001 e1sq = 6.73949674228 * 0.001 f = 1 / 298.257223563 def geodetic2ecef(lat, lon, alt): """Convert geodetic coordinates to ECEF. Units are degrees and kilometers. """ lat, lon = radians(lat), radians(lon) xi = sqrt(1 - esq * sin(lat)) x = (a / xi + alt) * cos(lat) * cos(lon) y = (a / xi + alt) * cos(lat)
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