Added zoom property to cameras. See #5364.

src/cameras/OrthographicCamera.js

@@ -8,6 +8,8 @@ THREE.OrthographicCamera = function ( left, right, top, bottom, near, far ) {
 
 	this.type = 'OrthographicCamera';
 
+	this.zoom = 1;
+
 	this.left = left;
 	this.right = right;
 	this.top = top;
@@ -24,7 +26,7 @@ THREE.OrthographicCamera.prototype = Object.create( THREE.Camera.prototype );
 
 THREE.OrthographicCamera.prototype.updateProjectionMatrix = function () {
 
-	this.projectionMatrix.makeOrthographic( this.left, this.right, this.top, this.bottom, this.near, this.far );
+	this.projectionMatrix.makeOrthographic( this.left / this.zoom, this.right / this.zoom, this.top / this.zoom, this.bottom / this.zoom, this.near, this.far );
 
 };
 
@@ -34,6 +36,8 @@ THREE.OrthographicCamera.prototype.clone = function () {
 
 	THREE.Camera.prototype.clone.call( this, camera );
 
+	camera.zoom = this.zoom;
+
 	camera.left = this.left;
 	camera.right = this.right;
 	camera.top = this.top;
@@ -42,5 +46,7 @@ THREE.OrthographicCamera.prototype.clone = function () {
 	camera.near = this.near;
 	camera.far = this.far;
 
+	camera.projectionMatrix.copy( this.projectionMatrix );
+
 	return camera;
 };

src/cameras/PerspectiveCamera.js

@@ -10,6 +10,8 @@ THREE.PerspectiveCamera = function ( fov, aspect, near, far ) {
 
 	this.type = 'PerspectiveCamera';
 
+	this.zoom = 1;
+
 	this.fov = fov !== undefined ? fov : 50;
 	this.aspect = aspect !== undefined ? aspect : 1;
 	this.near = near !== undefined ? near : 0.1;
@@ -93,7 +95,7 @@ THREE.PerspectiveCamera.prototype.updateProjectionMatrix = function () {
 	if ( this.fullWidth ) {
 
 		var aspect = this.fullWidth / this.fullHeight;
-		var top = Math.tan( THREE.Math.degToRad( this.fov * 0.5 ) ) * this.near;
+		var top = Math.tan( THREE.Math.degToRad( ( this.fov / this.zoom ) * 0.5 ) ) * this.near;
 		var bottom = - top;
 		var left = aspect * bottom;
 		var right = aspect * top;
@@ -111,7 +113,7 @@ THREE.PerspectiveCamera.prototype.updateProjectionMatrix = function () {
 
 	} else {
 
-		this.projectionMatrix.makePerspective( this.fov, this.aspect, this.near, this.far );
+		this.projectionMatrix.makePerspective( this.fov / this.zoom, this.aspect, this.near, this.far );
 
 	}
 
@@ -119,10 +121,19 @@ THREE.PerspectiveCamera.prototype.updateProjectionMatrix = function () {
 
 THREE.PerspectiveCamera.prototype.clone = function () {
 
-	var camera = new THREE.PerspectiveCamera( this.fov, this.aspect, this.near, this.far );
+	var camera = new THREE.PerspectiveCamera();
 
 	THREE.Camera.prototype.clone.call( this, camera );
 
+	camera.zoom = this.zoom;
+
+	camera.fov = this.fov;
+	camera.aspect = this.aspect;
+	camera.near = this.near;
+	camera.far = this.far;
+
+	camera.projectionMatrix.copy( this.projectionMatrix );
+
 	return camera;
 
 };