SceneTransforms

SceneTransforms()
Scene/SceneTransforms.js 36

Functions that do scene-dependent transforms between rendering-related coordinate systems.

Methods

staticCesium.SceneTransforms.wgs84ToDrawingBufferCoordinates(scene, position, result) → Cartesian2
Scene/SceneTransforms.js 220

Transforms a position in WGS84 coordinates to drawing buffer coordinates. This may produce different results from SceneTransforms.wgs84ToWindowCoordinates when the browser zoom is not 100%, or on high-DPI displays.
Name Type Description
scene Scene The scene.
position Cartesian3 The position in WGS84 (world) coordinates.
result Cartesian2 optional An optional object to return the input position transformed to window coordinates.
Returns:
The modified result parameter or a new Cartesian2 instance if one was not provided. This may be undefined if the input position is near the center of the ellipsoid.
Example:
// Output the window position of longitude/latitude (0, 0) every time the mouse moves.
var scene = widget.scene;
var ellipsoid = scene.globe.ellipsoid;
var position = Cesium.Cartesian3.fromDegrees(0.0, 0.0);
var handler = new Cesium.ScreenSpaceEventHandler(scene.canvas);
handler.setInputAction(function(movement) {
    console.log(Cesium.SceneTransforms.wgs84ToWindowCoordinates(scene, position));
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);

staticCesium.SceneTransforms.wgs84ToWindowCoordinates(scene, position, result) → Cartesian2
Scene/SceneTransforms.js 64

Transforms a position in WGS84 coordinates to window coordinates. This is commonly used to place an HTML element at the same screen position as an object in the scene.
Name Type Description
scene Scene The scene.
position Cartesian3 The position in WGS84 (world) coordinates.
result Cartesian2 optional An optional object to return the input position transformed to window coordinates.
Returns:
The modified result parameter or a new Cartesian2 instance if one was not provided. This may be undefined if the input position is near the center of the ellipsoid.
Example:
// Output the window position of longitude/latitude (0, 0) every time the mouse moves.
var scene = widget.scene;
var ellipsoid = scene.globe.ellipsoid;
var position = Cesium.Cartesian3.fromDegrees(0.0, 0.0);
var handler = new Cesium.ScreenSpaceEventHandler(scene.canvas);
handler.setInputAction(function(movement) {
    console.log(Cesium.SceneTransforms.wgs84ToWindowCoordinates(scene, position));
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);