Currently, I am using a Three.js Perspective Camera and I have the requirement to determine the direction where the camera is focused.
Is there a method to compute this by leveraging the camera's matrix or rotation vector?
Currently, I am using a Three.js Perspective Camera and I have the requirement to determine the direction where the camera is focused.
Is there a method to compute this by leveraging the camera's matrix or rotation vector?
The camera is currently positioned to look down its internal negative z-axis. You can select any point along the camera's negative z-axis by using the following code snippet:
var selectedPoint = new THREE.Vector3( 0, 0, -1 );
To convert this chosen point from camera space to world space, you can use the following transformation:
selectedPoint.applyMatrix4( camera.matrixWorld );
Please note that this will provide the specific point where the camera is directed towards. If you are interested in determining the direction in which the camera is facing, you can refer to this resource on Three.js: Get the Direction in which the Camera is Looking
UPDATE: Revised for three.js version r.59
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