Projection.getRay

Syntax

getRay(pos: Object);

Parameters

pos. Coordinates of ray start point.

Description

The getRay method returns a ray that comes out from the specified point.

Example

To execute the example the HTML page must contain the MapChart component named map (see Example of Creating the MapChart Component). Open a spherical map. Get direction coordinates for the ray that comes out from the point with the coordinates (10, 10):

// Get class object used to work with 3D projection
var projection = map.getGLControl().getProjection();
// Get ray direction from the point
var direction = projection.getRay({
    X: 10,
    Y: 10
}).getDirection();
console.log("X coordinate of ray: " + direction.getX());
console.log("Y coordinate of ray: " + direction.getY());
console.log("Z coordinate of ray: " + direction.getZ());

As a result the console displays ray coordinates:

X coordinate of ray: -0.20233237191132247

Y coordinate of ray: 0.08951007928384862

Z coordinate of ray: -0.9752176972262846