SceneTransforms

Methods

staticCesium.SceneTransforms.convert2DToCartesian(scene, position) → Cartesian3

将未经反投影的笛卡尔坐标转换为反投影后的笛卡尔坐标。

Name	Type	Description
scene	scene	参数scene是场景对象
position	position	待反投影的平面坐标

Returns:

Cartesian3

staticCesium.SceneTransforms.wgs84ToDrawingBufferCoordinates(scene, position, result) → Cartesian2

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

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);