semi working scaling effect

nirvana-ios/v2/InnerCircle/InnerCircleView.swift

@@ -67,6 +67,8 @@ struct InnerCircleView: View {
     private static let spacingBetweenRows: CGFloat = 16
     private static let totalColumns: Int = 10
     
+    let frameSize: CGPoint = CGPoint(x: UIScreen.main.bounds.size.width*0.5,y: UIScreen.main.bounds.size.height*0.5)
+    
     @State private var selectedUserIndex = 0
     
     let gridItems: [GridItem] = Array(
@@ -84,9 +86,6 @@ struct InnerCircleView: View {
 //                .frame(width: universalSize.width * 0.75)
 //                .frame(maxWidth: .infinity)
 //                .blur(radius: 8)
-            GeometryReader {proxy in
-                let localValues = proxy.frame(in: .local)
-                
                 
             ScrollView([.horizontal, .vertical], showsIndicators: false) {
                 LazyVGrid(
@@ -94,16 +93,25 @@ struct InnerCircleView: View {
                     alignment: .center,
                     spacing: Self.spacingBetweenRows
                 ) {
+                    
                     ForEach(1..<60) { value in
-                            VStack(alignment: .center) {
+                        GeometryReader {gridProxy in
+                            let posRelToGrid = gridProxy.frame(in: .global) // relative to the entire lazygrid
+                            
                             Image("Artboards_Diversity_Avatars_by_Netguru-\(value)")
                                 .resizable()
                                 .scaledToFit()
-                                    .frame(height: Self.size)
                                 .background(Color.white.opacity(0.5))
                                 .cornerRadius(100)
                                 .shadow(color: Color.black.opacity(0.2), radius: 10, x: 0, y: 20)
-                                    .scaleEffect(value == selectedUserIndex ? 1 : 0.75)
+                                .scaleEffect(
+                                    scale(
+                                        x: isEvenRow(value) ? gridProxy.frame(in: .global).midX + gridProxy.size.width/2 :
+                                            gridProxy.frame(in: .global).midX,
+                                        y: gridProxy.frame(in: .global).midY,
+                                        value: value%43
+                                    )
+                                )
                                 .offset(
                                     x: honeycombOffSetX(value),
                                     y: 0
@@ -126,20 +134,12 @@ struct InnerCircleView: View {
                                 }
                                 .animation(Animation.spring(), value: selectedUserIndex)
                             
-                                    
-                                
-//                                Text("local min x: \(localValues.minX)")
-//                                    .font(.caption)
-//                                Text("local min x: \(localValues.minY)")
-//                                    .font(.caption)
                         }
+                        .frame(height: Self.size)
                     }
-                    }
+                } // lazyvgrid
-                }
+                .padding(.trailing, Self.size / 2 + Self.spacingBetweenColumns / 2)
-                .foregroundColor(Color.blue)
+            } // scrollview
-                .frame(maxWidth: .infinity)
-            }
-            
             
             // navigation/footer
             
@@ -147,8 +147,87 @@ struct InnerCircleView: View {
         }
     }
     
-    private func getScale(_ value: Int) -> CGFloat {
+    private func isEvenRow(_ value: Int) -> Bool {
-        return 2
+        return (value / gridItems.count) % 2 == 0
+    }
+    
+    private func slope(p1: CGPoint, p2: CGPoint) -> CGFloat {
+        return (p2.y - p1.y)/(p2.x - p1.x)
+    }
+    
+    private func distanceBetweenPoints(p1: CGPoint, p2: CGPoint) -> CGFloat {
+        let xDist = abs(p2.x - p1.x)
+        let yDist = abs(p2.y - p2.y)
+        
+        return CGFloat(
+            sqrt(
+                pow(xDist, 2) + pow(yDist, 2)
+            )
+        )
+    }
+    
+    func offsetY(proxy: GeometryProxy, factor: CGFloat) -> CGFloat {
+            let y = proxy.frame(in: .global).midY
+
+            if y < frameSize.y {
+                return abs(y - frameSize.y) * factor
+            }
+
+            return -abs(y - frameSize.y) * factor
+
+        }
+
+        func offset(a: CGFloat, b: CGFloat, factor: CGFloat) -> CGFloat {
+            return abs(a - b) * factor
+        }
+
+        func distance2(x: CGFloat, y: CGFloat, value: Int) -> CGFloat {
+            //Fix crash with Slope
+            let m = (frameSize.y - y)/(frameSize.x - x)
+
+
+            let angle = abs(atan(m) * 180 / .pi)
+
+
+            //print("Angle: ", angle, apps[value])
+            //print("Slope: ", m, apps[value])
+            let ipadAngle: CGFloat = 35
+
+            if angle > ipadAngle {
+                let y2 = (y > frameSize.y) ? frameSize.y*2 : 0
+                let x2 = (y2 - y)/m + x
+                //print(apps[value], x2, y2)
+                return distance3(x: x2, y: y2, value: value)
+            } else {
+                let x2 = (x > frameSize.x) ? frameSize.x*2 : 0
+                let y2 = m * (x2 - x) + y
+                //print(apps[value], x2, y2)
+                return distance3(x: x2, y: y2, value: value)
+            }
+        }
+
+        func distance3(x: CGFloat, y: CGFloat, value: Int) -> CGFloat {
+            let xDist = abs(x - frameSize.x)
+            let yDist = abs(y - frameSize.y)
+
+            return CGFloat(sqrt(xDist * xDist + yDist * yDist))
+        }
+    
+    
+    func scale(x: CGFloat, y: CGFloat, value: Int) -> CGFloat {
+            let xDist = abs(x - frameSize.x)
+            let yDist = abs(y - frameSize.y)
+
+            let maxDistanceToCenter = distance2(x: x, y: y, value: value)//CGFloat(sqrt(frameSize.x * frameSize.x + frameSize.y * frameSize.y))
+            let result = CGFloat(sqrt(xDist * xDist + yDist * yDist))
+
+            //print("distance: \(apps[value]) ", result)
+            //print("center: \(apps[value]) ", maxDistanceToCenter)
+            let total = min(abs(result - maxDistanceToCenter), maxDistanceToCenter*0.7)
+
+            let finalResult = total/(maxDistanceToCenter) * 1.4
+
+            return finalResult
         }
     
     private func honeycombOffSetX(_ value: Int) -> CGFloat {