Class: SceneTransforms

Methods

static convert2DToCartesian(scene, position){Cartesian3}

Convert non backprojected Cartesian coordinates to backprojected Cartesian coordinates.

Name	Type	Description
scene	scene	The parameter scene is a scene object.
position	position	The plane coordinates to be back projected.

Returns:

Type	Description
Cartesian3	Cartesian3

static wgs84ToDrawingBufferCoordinates(scene, position, result){Cartesian2}

Convert the position in WGS84 coordinates to drawing buffer coordinates. When the browser zoom is not 100% or on a high-resolution display, this may result in different results than SceneTransforms.wgs84ToWindow Coordinates.

Name	Type	Description
scene	Scene	Scene.
position	Cartesian3	The location represented by WGS84 (geographic) coordinates.
result	Cartesian2	optional Optional object, used to return the input position converted to window coordinates.

Returns:

Type	Description
Cartesian2	The modified result parameters, or a new Cartesian2 instance (if not provided). If the input position is close to the center of the ellipsoid, it may not be possible to define.

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 = SuperMap3D.Cartesian3.fromDegrees(0.0, 0.0);
var handler = new SuperMap3D.ScreenSpaceEventHandler(scene.canvas);
handler.setInputAction(function(movement) {
    console.log(SuperMap3D.SceneTransforms.wgs84ToWindowCoordinates(scene, position));
}, SuperMap3D.ScreenSpaceEventType.MOUSE_MOVE);

static wgs84ToWindowCoordinates(scene, position, result){Cartesian2}

Convert the position in WGS84 coordinates to window coordinates. This is typically used to place HTML elements in the same screen position as objects in the scene.

Name	Type	Description
scene	Scene	Scene.
position	Cartesian3	The location represented by WGS84 (geographic) coordinates.
result	Cartesian2	optional Optional object, used to return the input position converted to window coordinates.

Returns:

Type	Description
Cartesian2	The modified result parameters, or a new Cartesian2 instance (if not provided). If the input position is close to the center of the ellipsoid, it may not be possible to define.

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 = SuperMap3D.Cartesian3.fromDegrees(0.0, 0.0);
var handler = new SuperMap3D.ScreenSpaceEventHandler(scene.canvas);
handler.setInputAction(function(movement) {
    console.log(SuperMap3D.SceneTransforms.wgs84ToWindowCoordinates(scene, position));
}, SuperMap3D.ScreenSpaceEventType.MOUSE_MOVE);