Done!

Assets/Point/Point Surface.shader

@@ -20,7 +20,7 @@
 
 		void ConfigureSurface(Input input, inout SurfaceOutputStandard surface)
 		{
-			surface.Albedo = saturate(input.worldPos * 0.5 + 0.5);
+			surface.Albedo.rg = saturate(input.worldPos.xy * 0.5 + 0.5);
 			surface.Smoothness = _Smoothness;
 		}
 

Assets/Scenes/SampleScene.unity

@@ -38,7 +38,7 @@ RenderSettings:
   m_ReflectionIntensity: 1
   m_CustomReflection: {fileID: 0}
   m_Sun: {fileID: 705507994}
-  m_IndirectSpecularColor: {r: 0.44657892, g: 0.4964133, b: 0.57481736, a: 1}
+  m_IndirectSpecularColor: {r: 0.18028378, g: 0.22571412, b: 0.30692285, a: 1}
   m_UseRadianceAmbientProbe: 0
 --- !u!157 &3
 LightmapSettings:
@@ -153,7 +153,6 @@ MonoBehaviour:
   pointPrefab: {fileID: 5221897554875366738, guid: d73a635284aa0ca4eb9cc40879b3267d,
     type: 3}
   resolution: 50
-  function: 0
 --- !u!4 &75389716
 Transform:
   m_ObjectHideFlags: 0
@@ -253,13 +252,13 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 705507993}
-  m_LocalRotation: {x: 0.40821788, y: 0.23456976, z: -0.10938167, w: 0.8754261}
+  m_LocalRotation: {x: 0.40821788, y: -0.23456968, z: 0.10938163, w: 0.8754261}
   m_LocalPosition: {x: 0, y: 3, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children: []
   m_Father: {fileID: 0}
   m_RootOrder: 1
-  m_LocalEulerAnglesHint: {x: 50, y: 30, z: 0}
+  m_LocalEulerAnglesHint: {x: 50, y: -30, z: 0}
 --- !u!1 &963194225
 GameObject:
   m_ObjectHideFlags: 0
@@ -337,13 +336,13 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 963194225}
-  m_LocalRotation: {x: -0.32403755, y: -0.3351304, z: 0.123971656, w: -0.87596714}
-  m_LocalPosition: {x: -1.7640238, y: 2.0069275, z: -2.0079021}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: -2}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children: []
   m_Father: {fileID: 0}
   m_RootOrder: 0
-  m_LocalEulerAnglesHint: {x: 37.741, y: 43.286003, z: 3.548}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!114 &963194229
 MonoBehaviour:
   m_ObjectHideFlags: 0

Assets/Script/FunctionLibrary.cs

@@ -1,71 +0,0 @@
-using UnityEngine;
-using static UnityEngine.Mathf;
-
-public static class FunctionLibrary
-{
-    public delegate Vector3 Function(float u, float v, float y);
-
-    public enum FunctionName { Wave, MultiWave, Ripple, Sphere, Torus }
-
-    private static Function[] functions = { Wave, MultiWave, Ripple, Sphere, Torus };
-
-    public static Function GetFunction(FunctionName name)
-    {
-        return functions[(int)name];
-    }
-
-    public static Vector3 Wave(float u, float v, float t)
-    {
-        Vector3 p;
-        p.x = u;
-        p.y = Sin(PI * (u + v + t));
-        p.z = v;
-        return p;
-    }
-
-    public static Vector3 MultiWave(float u, float v, float t)
-    {
-        Vector3 p;
-        p.x = u;
-        p.y = Sin(PI * (u + 0.5f * t));
-        p.y += 0.5f * Sin(2f * PI * (v + t));
-        p.y += Sin(PI * (u + v + 0.25f * t));
-        p.y *= 1f / 2.5f;
-        p.z = v;
-        return p;
-    }
-
-    public static Vector3 Ripple(float u, float v, float t)
-    {
-        var d = Sqrt(u * u + v * v);
-        Vector3 p;
-        p.x = u;
-        p.y = Sin(PI * (4f * d - t));
-        p.y /= 1f + 10f * d;
-        p.z = v;
-        return p;
-    }
-
-    public static Vector3 Sphere(float u, float v, float t)
-    {
-        float r = 0.9f + 0.1f * Sin(PI * (6f * u + 4f * v + t));
-        float s = r * Cos(0.5f * PI * v);
-        Vector3 p;
-        p.x = s * Sin(PI * u);
-        p.y = r * Sin(0.5f * PI * v);
-        p.z = s * Cos(PI * u);
-        return p;
-    }
-
-    public static Vector3 Torus(float u, float v, float t)
-    {
-        float r1 = 0.7f + 0.1f * Sin(PI * (6f * u + 0.5f * t));
-        float r2 = 0.15f + 0.05f * Sin(PI * (8f * u + 4f * v + 2f * t));
-        float s = r1 + r2 * Cos(PI * v);
-        Vector3 p;
-        p.x = s * Sin(PI * u);
-        p.y = r2 * Sin(PI * v);
-        p.z = s * Cos(PI * u);
-        return p;
-    }
-}

Assets/Script/FunctionLibrary.cs.meta

@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: e5d4ebe0e863dfd49b58925b59880bf7
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

Assets/Script/Graph.cs

@@ -8,19 +8,19 @@ public class Graph : MonoBehaviour
     [SerializeField, Range(10, 100)]
     int resolution = 10;
 
-    [SerializeField]
-    FunctionLibrary.FunctionName function = default;
-
     Transform[] points;
 
     private void Awake()
     {
-        var step = 2f / resolution;
+        var step = 2.0f / resolution;
+        var position = Vector3.zero;
         var scale = Vector3.one * step;
-        points = new Transform[resolution * resolution];
+        points = new Transform[resolution];
         for (int i = 0; i < points.Length; i++)
         {
             Transform point = Instantiate(pointPrefab);
+            position.x = (i + 0.5f) * step - 1.0f;
+            point.localPosition = position;
             point.localScale = scale;
             point.SetParent(transform, false);
             points[i] = point;
@@ -29,20 +29,13 @@ public class Graph : MonoBehaviour
 
     private void Update()
     {
-        FunctionLibrary.Function f = FunctionLibrary.GetFunction(function);
         var time = Time.time;
-        var step = 2.0f / resolution;
-        var v = 0.5f * step - 1f;
-        for (int i = 0, x = 0, z = 0; i < points.Length; i++, x++)
+        for (int i = 0; i < points.Length; i++)
         {
-            if (x == resolution)
-            {
-                x = 0;
-                z += 1;
-                v = (z + 0.5f) * step - 1f;
-            }
-            float u = (x + 0.5f) * step - 1f;
-            points[i].localPosition = f(u, v, time);
+            Transform point = points[i];
+            Vector3 position = point.localPosition;
+            position.y = Mathf.Sin(Mathf.PI * (position.x + time));
+            point.localPosition = position;
         }
     }
 }

Assets/URP/URP.asset

@@ -28,18 +28,18 @@ MonoBehaviour:
   m_RenderScale: 1
   m_MainLightRenderingMode: 1
   m_MainLightShadowsSupported: 1
-  m_MainLightShadowmapResolution: 4096
+  m_MainLightShadowmapResolution: 2048
   m_AdditionalLightsRenderingMode: 1
   m_AdditionalLightsPerObjectLimit: 4
   m_AdditionalLightShadowsSupported: 0
   m_AdditionalLightsShadowmapResolution: 512
-  m_ShadowDistance: 10
+  m_ShadowDistance: 50
   m_ShadowCascades: 0
   m_Cascade2Split: 0.25
   m_Cascade4Split: {x: 0.067, y: 0.2, z: 0.467}
   m_ShadowDepthBias: 1
   m_ShadowNormalBias: 1
-  m_SoftShadowsSupported: 1
+  m_SoftShadowsSupported: 0
   m_UseSRPBatcher: 1
   m_SupportsDynamicBatching: 0
   m_MixedLightingSupported: 1

ProjectSettings/ProjectSettings.asset

@@ -4,7 +4,7 @@
 PlayerSettings:
   m_ObjectHideFlags: 0
   serializedVersion: 20
-  productGUID: 0e84fdf2766f65b408b878c2492b3a6f
+  productGUID: d2816c567858caa4d908a68155d97c6b
   AndroidProfiler: 0
   AndroidFilterTouchesWhenObscured: 0
   AndroidEnableSustainedPerformanceMode: 0
@@ -13,7 +13,7 @@ PlayerSettings:
   useOnDemandResources: 0
   accelerometerFrequency: 60
   companyName: DefaultCompany
-  productName: Tutorials-Basics-MathematicalSurfaces
+  productName: Tutorials-Basics-BuildingAGraph
   defaultCursor: {fileID: 0}
   cursorHotspot: {x: 0, y: 0}
   m_SplashScreenBackgroundColor: {r: 0.13725491, g: 0.12156863, b: 0.1254902, a: 1}
@@ -582,7 +582,19 @@ PlayerSettings:
   webGLLinkerTarget: 1
   webGLThreadsSupport: 0
   webGLWasmStreaming: 0
-  scriptingDefineSymbols: {}
+  scriptingDefineSymbols:
+    1: UNITY_POST_PROCESSING_STACK_V2
+    4: UNITY_POST_PROCESSING_STACK_V2
+    7: UNITY_POST_PROCESSING_STACK_V2
+    13: UNITY_POST_PROCESSING_STACK_V2
+    14: UNITY_POST_PROCESSING_STACK_V2
+    19: UNITY_POST_PROCESSING_STACK_V2
+    21: UNITY_POST_PROCESSING_STACK_V2
+    25: UNITY_POST_PROCESSING_STACK_V2
+    27: UNITY_POST_PROCESSING_STACK_V2
+    28: UNITY_POST_PROCESSING_STACK_V2
+    29: UNITY_POST_PROCESSING_STACK_V2
+    30: UNITY_POST_PROCESSING_STACK_V2
   platformArchitecture: {}
   scriptingBackend: {}
   il2cppCompilerConfiguration: {}