added files via upload

Tweaks/FLEX/ViewHierarchy/SnapshotExplorer/Scene/FHSSnapshotNodes.m

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+//
+//  FHSSnapshotNodes.m
+//  FLEX
+//
+//  Created by Tanner Bennett on 1/7/20.
+//
+
+#import "FHSSnapshotNodes.h"
+#import "SceneKit+Snapshot.h"
+
+@interface FHSSnapshotNodes ()
+@property (nonatomic, nullable) SCNNode *highlight;
+@property (nonatomic, nullable) SCNNode *dimming;
+@end
+@implementation FHSSnapshotNodes
+
++ (instancetype)snapshot:(FHSViewSnapshot *)snapshot depth:(NSInteger)depth {
+    FHSSnapshotNodes *nodes = [self new];
+    nodes->_snapshotItem = snapshot;
+    nodes->_depth = depth;
+    return nodes;
+}
+
+- (void)setHighlighted:(BOOL)highlighted {
+    if (_highlighted != highlighted) {
+        _highlighted = highlighted;
+
+        if (highlighted) {
+            if (!self.highlight) {
+                // Create highlight node
+                self.highlight = [SCNNode
+                    highlight:self.snapshotItem
+                    color:[UIColor.blueColor colorWithAlphaComponent:0.5]
+                ];
+            }
+            // Add add highlight node, remove dimming node if dimmed
+            [self.snapshot addChildNode:self.highlight];
+            if (self.isDimmed) {
+                [self.dimming removeFromParentNode];
+            }
+        } else {
+            // Remove highlight node, add back dimming node if dimmed
+            [self.highlight removeFromParentNode];
+            if (self.isDimmed) {
+                [self.snapshot addChildNode:self.dimming];
+            }
+        }
+    }
+}
+
+- (void)setDimmed:(BOOL)dimmed {
+    if (_dimmed != dimmed) {
+        _dimmed = dimmed;
+
+        if (dimmed) {
+            if (!self.dimming) {
+                // Create dimming node
+                self.dimming = [SCNNode
+                    highlight:self.snapshotItem
+                    color:[UIColor.blackColor colorWithAlphaComponent:0.5]
+                ];
+            }
+            // Add add dimming node if not highlighted
+            if (!self.isHighlighted) {
+                [self.snapshot addChildNode:self.dimming];
+            }
+        } else {
+            // Remove dimming node (if not already highlighted)
+            if (!self.isHighlighted) {
+                [self.dimming removeFromParentNode];
+            }
+        }
+    }
+}
+
+- (void)setForceHideHeader:(BOOL)forceHideHeader {
+    if (_forceHideHeader != forceHideHeader) {
+        _forceHideHeader = forceHideHeader;
+
+        if (self.header.parentNode) {
+            self.header.hidden = YES;
+            [self.header removeFromParentNode];
+        } else {
+            self.header.hidden = NO;
+            [self.snapshot addChildNode:self.header];
+        }
+    }
+}
+
+@end