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import { WebGLCoordinateSystem } from '../constants.js';
import { Matrix4 } from '../math/Matrix4.js';
import { Object3D } from '../core/Object3D.js';

/**
 * Abstract base class for cameras. This class should always be inherited
 * when you build a new camera.
 *
 * @abstract
 * @augments Object3D
 */
class Camera extends Object3D {

/**
	 * Constructs a new camera.
	 */
	constructor() {

super();

/**
		 * This flag can be used for type testing.
		 *
		 * @type {boolean}
		 * @readonly
		 * @default true
		 */
		this.isCamera = true;

this.type = 'Camera';

/**
		 * The inverse of the camera's world matrix.
		 *
		 * @type {Matrix4}
		 */
		this.matrixWorldInverse = new Matrix4();

/**
		 * The camera's projection matrix.
		 *
		 * @type {Matrix4}
		 */
		this.projectionMatrix = new Matrix4();

/**
		 * The inverse of the camera's projection matrix.
		 *
		 * @type {Matrix4}
		 */
		this.projectionMatrixInverse = new Matrix4();

/**
		 * The coordinate system in which the camera is used.
		 *
		 * @type {(WebGLCoordinateSystem|WebGPUCoordinateSystem)}
		 */
		this.coordinateSystem = WebGLCoordinateSystem;

}

copy( source, recursive ) {

super.copy( source, recursive );

this.matrixWorldInverse.copy( source.matrixWorldInverse );

this.projectionMatrix.copy( source.projectionMatrix );
		this.projectionMatrixInverse.copy( source.projectionMatrixInverse );

this.coordinateSystem = source.coordinateSystem;

return this;

}

/**
	 * Returns a vector representing the ("look") direction of the 3D object in world space.
	 *
	 * This method is overwritten since cameras have a different forward vector compared to other
	 * 3D objects. A camera looks down its local, negative z-axis by default.
	 *
	 * @param {Vector3} target - The target vector the result is stored to.
	 * @return {Vector3} The 3D object's direction in world space.
	 */
	getWorldDirection( target ) {

return super.getWorldDirection( target ).negate();

}

updateMatrixWorld( force ) {

super.updateMatrixWorld( force );

this.matrixWorldInverse.copy( this.matrixWorld ).invert();

}

updateWorldMatrix( updateParents, updateChildren ) {

super.updateWorldMatrix( updateParents, updateChildren );

this.matrixWorldInverse.copy( this.matrixWorld ).invert();

}

clone() {

return new this.constructor().copy( this );

}

export { Camera };

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Name	Size	Perms	Modified	Actions
ArrayCamera.js	1.02 KB	lrw-r--r--	2025-03-28 11:04:37	Edit Download recursive recursive
Camera.js	2.32 KB	lrw-r--r--	2025-03-28 11:04:37	Edit Download recursive recursive
CubeCamera.js	6.22 KB	lrw-r--r--	2025-03-28 11:04:38	Edit Download recursive recursive
OrthographicCamera.js	5.66 KB	lrwxr-xr-x	2025-03-28 11:04:38	Edit Download recursive recursive
PerspectiveCamera.js	10.39 KB	lrw-r--r--	2025-03-28 11:04:38	Edit Download recursive recursive
StereoCamera.js	3.87 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive

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