Merge pull request #47 from panter/clear-scene

Clear scene

Author: qftgtr

components/lib/createArComponent.js

@@ -16,10 +16,10 @@ export default (Manager, propTypes = {}) => {
       });
     }
 
-    componentWillUpdate() {
+    componentWillUpdate(props) {
       Manager.mount({
         id: this.identifier,
-        ...parseColorInProps(this.props),
+        ...parseColorInProps(props),
       });
     }
 

ios/RCTARKit.m

@@ -81,6 +81,7 @@ - (void)pause {
 
 - (void)resume {
     [self.session runWithConfiguration:self.configuration];
+    [self.nodeManager clear];
 }
 
 - (void)focusScene {

ios/RCTARKitNodes.h

@@ -42,6 +42,6 @@ typedef NS_OPTIONS(NSUInteger, RFReferenceFrame) {
 - (SCNNode *)nodeForKey:(NSString *)key;
 - (void)removeNodeForKey:(NSString *)key;
 - (NSDictionary *)getSceneObjectsHitResult:(const CGPoint)tapPoint;
-
+- (void)clear;
 
 @end

ios/RCTARKitNodes.m

@@ -89,7 +89,19 @@ - (void)addNodeToScene:(SCNNode *)node property:(NSDictionary *)property {
     }
 }
 
-
+- (void) clear {
+    // clear scene
+    NSArray*keys=[self.nodes allKeys];
+    
+    for(id key in keys) {
+        id node = [self.nodes objectForKey:key];
+        if(node) {
+            [node removeFromParentNode];
+        }
+        
+    }
+    [self.nodes removeAllObjects];
+}
 
 - (void)addNodeToLocalFrame:(SCNNode *)node property:(NSDictionary *)property {
     node.position = [self getPositionFromProperty:property inReferenceFrame:RFReferenceFrameLocal];
@@ -105,7 +117,7 @@ - (void)addNodeToLocalFrame:(SCNNode *)node property:(NSDictionary *)property {
     if(property[@"rotation"]) {
         node.orientation = makeQuaternionFromDict(property[@"rotation"]);
     }
-   
+    
     node.referenceFrame = RFReferenceFrameLocal;
 
     NSString *key = [NSString stringWithFormat:@"%@", property[@"id"]];