compiler struggling with examples and type inference, most warnings s…

…orted

Sources/Lindenmayer/Examples/Examples3D.swift

@@ -218,7 +218,9 @@ public enum Examples3D: Sendable {
     /// ![A screenshot showing four rendered trees that correspond to the parameters as described in The Algorithmic Beauty of Plants for figure 2.6](rendered_2_6_trees.png)
     ///
     /// The example source for this L-system is [available on GitHub](https://github.com/heckj/Lindenmayer/blob/main/Sources/Lindenmayer/Examples3D.swift).
-    public static let monopodialTree = LSystem.create(
+    ///
+
+    public static let monopodialTree: ParameterizedRandomContextualLSystem<MonopodialDefn, Xoshiro> = LSystem.create(
         [Trunk(growthDistance: defines.trunklength, diameter: defines.trunkdiameter)],
         with: Xoshiro(seed: 42),
         using: defines
@@ -349,7 +351,7 @@ public enum Examples3D: Sendable {
     /// ![A screenshot showing four rendered trees that correspond to the parameters as described in The Algorithmic Beauty of Plants for figure 2.7](rendered_2_7_trees.png)
     ///
     /// The example source for this L-system is [available on GitHub](https://github.com/heckj/Lindenmayer/blob/main/Sources/Lindenmayer/Examples3D.swift).
-    public static let sympodialTree = LSystem.create(
+    public static let sympodialTree: ParameterizedRandomContextualLSystem<SympodialDefn, Xoshiro> = LSystem.create(
         MainBranch(growthDistance: 10, diameter: 1),
         with: Xoshiro(seed: 0),
         using: figure2_7A

Sources/Lindenmayer/PRNG/RNGWrapper.swift

@@ -24,7 +24,7 @@ import Foundation
 ///
 /// - ``RNGWrapper/resetRNG(seed:)``
 ///
-public actor RNGWrapper<PRNG> where PRNG: SeededRandomNumberGenerator {
+public actor RNGWrapper<PRNG>: Sendable where PRNG: SeededRandomNumberGenerator {
     private var _prng: PRNG
     #if DEBUG
         var _invokeCount: UInt64 = 0
@@ -48,12 +48,8 @@ public actor RNGWrapper<PRNG> where PRNG: SeededRandomNumberGenerator {
 
     /// Creates a new random number generator wrapper class with the random number generator you provide.
     /// - Parameter prng: A random number generator.
-    public init(_ prng: PRNG, seed: UInt64? = nil) {
-        if let seedValue = seed {
-            _prng = PRNG(seed: seedValue)
-        } else {
-            _prng = prng
-        }
+    public init(_ prng: PRNG) {
+        _prng = prng
     }
 
     /// Returns a random float value within the range you provide.

Sources/Lindenmayer/PRNG/SeededRandomNumberGenerator.swift

@@ -11,7 +11,7 @@ import Foundation
 /// The protocol includes an adjustable position property that represents the current location within the space of random numbers that the random number generates.
 /// The seed value is preserved and unchanged, allowing the seeded random number generator to be interrogated and replicated.
 /// When applied to a pseudo-random number generator, with a given seed and position, the next random number should be  completely deterministic.
-public protocol SeededRandomNumberGenerator: RandomNumberGenerator {
+public protocol SeededRandomNumberGenerator: RandomNumberGenerator, Sendable {
     /// The seed for the random number generator.
     var seed: UInt64 { get }
 

Sources/Lindenmayer/PRNG/Xoshiro.swift

@@ -19,7 +19,7 @@
 /// A pseudo-random number generator that produces random numbers based on an initial seed.
 ///
 /// The algorithm for the generation is xoshiro256, based on the [public domain implementation](http://xoshiro.di.unimi.it).
-public struct Xoshiro: SeededRandomNumberGenerator {
+public struct Xoshiro: SeededRandomNumberGenerator, Sendable {
     /// The initial seed for pseuo-random number generation.
     public let seed: UInt64
 

Sources/LindenmayerViews/Dynamic2DLSystemViews.swift

@@ -10,6 +10,7 @@ import SwiftUI
 
 /// A view that allows you to choose from a collection of the built-in 2D L-systems and display the 2D representation of the L-system at the number of iterations that you select in the view.
 @available(macOS 12.0, iOS 15.0, *)
+@MainActor
 public struct Dynamic2DLSystemViews: View {
     enum TwoDExamples: String, CaseIterable, Identifiable {
         case algae

Sources/LindenmayerViews/LSystem3DControlView.swift

@@ -15,6 +15,7 @@ import SwiftUI
 /// The controls within the view allow you to select the number of iterations for the L-system.
 /// Within the resulting L-system's state, you can select each state of the L-system, which points the 3D camera at that node and highlights it.
 /// The view is intended to provide a visualization with sufficient detail about the state and its representation for debugging how an L-system is represented in 3D.
+@MainActor
 public struct LSystem3DControlView: View {
     var model: LSystem3DModel
     @State private var iterations = 1

Sources/LindenmayerViews/LSystem3DModel.swift

@@ -5,17 +5,18 @@
 //  Created by Joseph Heck on 1/8/22.
 //
 
-import Combine
+@preconcurrency import Combine
 import Foundation
 import Lindenmayer
-@preconcurrency import SceneKit
+import SceneKit
 import SceneKitDebugTools
 import SwiftUI
 
 /// A class that provides an observable model around a base L-system.
 ///
 /// The module manages the number of evolutions of an L-system, and provides updated 3D SceneKit scenes as you change the number of evolutions.
 /// The model emits `ObservableObject` change notifications when the number of iterations is changed.
+@MainActor
 public class LSystem3DModel: ObservableObject {
     @Published public var system: LindenmayerSystem
     let renderer = SceneKitRenderer()
@@ -24,7 +25,7 @@ public class LSystem3DModel: ObservableObject {
     var _scene: SCNScene
     var _transformSequence: [matrix_float4x4]
 
-    public var objectWillChange = Combine.ObservableObjectPublisher()
+    public let objectWillChange: ObservableObjectPublisher
 
     public var scene: SCNScene {
         _scene
@@ -63,6 +64,7 @@ public class LSystem3DModel: ObservableObject {
     /// - Parameter system: The L-System to expose and control with the model.
     public init(system: LindenmayerSystem) {
         self.system = system
+        objectWillChange = ObservableObjectPublisher()
         (_scene, _transformSequence) = renderer.generateScene(lsystem: _baseSystem)
         let headingIndicator = DebugNodes.headingIndicator()
         _scene.rootNode.addChildNode(headingIndicator)
@@ -71,6 +73,7 @@ public class LSystem3DModel: ObservableObject {
     /// Creates a default L-System model using the sympodial tree example.
     public init() {
         system = _baseSystem
+        objectWillChange = ObservableObjectPublisher()
         (_scene, _transformSequence) = renderer.generateScene(lsystem: _baseSystem)
         let headingIndicator = DebugNodes.headingIndicator()
         _scene.rootNode.addChildNode(headingIndicator)

Sources/LindenmayerViews/Lsystem2DView.swift

@@ -10,6 +10,7 @@ import SwiftUI
 
 /// A view that provides a 2D rendering of the L-system provide, and optionally metrics associated with the L-system.
 @available(macOS 12.0, iOS 15.0, *)
+@MainActor
 public struct Lsystem2DView: View {
     let iterations: Int
     let displayMetrics: Bool

Sources/LindenmayerViews/Lsystem3DView.swift

@@ -10,6 +10,7 @@ import SceneKit
 import SwiftUI
 
 /// A view that provides a 3D rendering of the L-system provide, and optionally metrics associated with the L-system.
+@MainActor
 public struct Lsystem3DView: View {
     let displayMetrics: Bool
     @State var system: LindenmayerSystem