SceneTransforms

SceneTransforms

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

Source:

Methods

<static>

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.

Parameters:
Name Type Argument Default Description
scene Scene The scene.
position Cartesian3 The position in WGS84 (world) coordinates.
result Cartesian2 <optional>
undefined An optional object to return the input position transformed to window coordinates.
Throws:
Returns:
Cartesian2 The modified result parameter or a new Cartesian3 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 = widget.centralBody.getEllipsoid();
var position = ellipsoid.cartographicToCartesian(new Cartographic(0.0, 0.0));
var handler = new Cesium.ScreenSpaceEventHandler(scene.getCanvas());
handler.setInputAction(function(movement) {
    console.log(Cesium.SceneTransforms.wgs84ToWindowCoordinates(scene, position));
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);

<static>

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.

Parameters:
Name Type Argument Default Description
scene Scene The scene.
position Cartesian3 The position in WGS84 (world) coordinates.
result Cartesian2 <optional>
undefined An optional object to return the input position transformed to window coordinates.
Throws:
Returns:
Cartesian2 The modified result parameter or a new Cartesian3 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 = widget.centralBody.getEllipsoid();
var position = ellipsoid.cartographicToCartesian(new Cartographic(0.0, 0.0));
var handler = new Cesium.ScreenSpaceEventHandler(scene.getCanvas());
handler.setInputAction(function(movement) {
    console.log(Cesium.SceneTransforms.wgs84ToWindowCoordinates(scene, position));
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);