ReflectorNode: Fix dispose(). (mrdoob#30933)

Author: Mugen87

src/nodes/utils/ReflectorNode.js

@@ -161,6 +161,17 @@ class ReflectorNode extends TextureNode {
 
 	}
 
+	/**
+	 * Frees internal resources. Should be called when the node is no longer in use.
+	 */
+	dispose() {
+
+		super.dispose();
+
+		this._reflectorBaseNode.dispose();
+
+	}
+
 }
 
 /**
@@ -269,9 +280,9 @@ class ReflectorBaseNode extends Node {
 		/**
 		 * Weak map for managing render targets.
 		 *
-		 * @type {WeakMap<Camera, RenderTarget>}
+		 * @type {Map<Camera, RenderTarget>}
 		 */
-		this.renderTargets = new WeakMap();
+		this.renderTargets = new Map();
 
 		/**
 		 * Force render even if reflector is facing away from camera.
@@ -308,6 +319,21 @@ class ReflectorBaseNode extends Node {
 
 	}
 
+	/**
+	 * Frees internal resources. Should be called when the node is no longer in use.
+	 */
+	dispose() {
+
+		super.dispose();
+
+		for ( const renderTarget of this.renderTargets.values() ) {
+
+			renderTarget.dispose();
+
+		}
+
+	}
+
 	/**
 	 * Returns a virtual camera for the given camera. The virtual camera is used to
 	 * render the scene from the reflector's view so correct reflections can be produced.

src/renderers/common/Textures.js

@@ -343,8 +343,6 @@ class Textures extends DataMap {
 
 				this._destroyTexture( texture );
 
-				this.info.memory.textures --;
-
 			};
 
 			texture.addEventListener( 'dispose', onDispose );
@@ -445,10 +443,16 @@ class Textures extends DataMap {
 	 */
 	_destroyTexture( texture ) {
 
-		this.backend.destroySampler( texture );
-		this.backend.destroyTexture( texture );
+		if ( this.has( texture ) === true ) {
+
+			this.backend.destroySampler( texture );
+			this.backend.destroyTexture( texture );
+
+			this.delete( texture );
 
-		this.delete( texture );
+			this.info.memory.textures --;
+
+		}
 
 	}