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Assets/Script/MeshGeneration.cs

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+using System;
+using Unity.VisualScripting;
+using UnityEngine;
+
+
+public class MeshGeneration : MonoBehaviour
+{
+    [SerializeField] private Noise noise;
+    [SerializeField] private ComputeShader marchShader;
+
+    public Mesh March(int numPointsPerAxis, Vector3 offset, float isoLevel)
+    {
+        Buffers.Create(numPointsPerAxis);
+        int numVoxelsPerAxis = numPointsPerAxis - 1;
+        int numThreadsPerAxis = Mathf.CeilToInt (numVoxelsPerAxis / (float) 8);
+        noise.Generate(numPointsPerAxis, numThreadsPerAxis, offset);
+        
+        marchShader.SetBuffer(0, "points", Buffers.pointsBuffer);
+        marchShader.SetBuffer(0, "triangles", Buffers.triangleBuffer);
+        marchShader.SetInt("numPointsPerAxis", numPointsPerAxis);
+        marchShader.SetFloat("isoLevel", isoLevel);
+        
+        marchShader.Dispatch(0, numThreadsPerAxis,numThreadsPerAxis,numThreadsPerAxis);
+        
+        ComputeBuffer.CopyCount(Buffers.triangleBuffer, Buffers.triCountBuffer, 0);
+        int[] triCountArray = { 0 };
+        Buffers.triCountBuffer.GetData(triCountArray);
+        int numTris = triCountArray[0];
+
+        Triangle[] tris = new Triangle[numTris];
+        Buffers.triangleBuffer.GetData(tris, 0,0, numTris);
+        
+        Mesh mesh = new Mesh();
+        mesh.Clear();
+        
+        var vertices = new Vector3[numTris * 3];
+        var meshTriangles = new int[numTris * 3];
+
+        for (int i = 0; i < numTris; i++) {
+            for (int j = 0; j < 3; j++) {
+                meshTriangles[i * 3 + j] = i * 3 + j;
+                vertices[i * 3 + j] = tris[i][j];
+            }
+        }
+        mesh.vertices = vertices;
+        mesh.triangles = meshTriangles;
+        
+        mesh.RecalculateNormals();
+        return mesh;
+    }
+
+    private void OnDestroy()
+    {
+        Buffers.Release();
+    }
+
+    struct Triangle
+    {
+        public Vector3 a;
+        public Vector3 b;
+        public Vector3 c;
+        
+        public Vector3 this [int i] {
+            get {
+                switch (i) {
+                    case 0:
+                        return a;
+                    case 1:
+                        return b;
+                    default:
+                        return c;
+                }
+            }
+        }
+    }
+}