diff --git a/src/DotRecast.Detour/DtNavMeshQuery.cs b/src/DotRecast.Detour/DtNavMeshQuery.cs
index c4dd060..678c05a 100644
--- a/src/DotRecast.Detour/DtNavMeshQuery.cs
+++ b/src/DotRecast.Detour/DtNavMeshQuery.cs
@@ -137,12 +137,12 @@ namespace DotRecast.Detour
             }
 
             // Randomly pick point on polygon.
-            float[] verts = new float[3 * m_nav.GetMaxVertsPerPoly()];
-            float[] areas = new float[m_nav.GetMaxVertsPerPoly()];
-            RcArrays.Copy(tile.data.verts, poly.verts[0] * 3, verts, 0, 3);
+            Span<float> verts = stackalloc float[3 * m_nav.GetMaxVertsPerPoly()];
+            Span<float> areas = stackalloc float[m_nav.GetMaxVertsPerPoly()];
+            RcSpans.Copy(tile.data.verts, poly.verts[0] * 3, verts, 0, 3);
             for (int j = 1; j < poly.vertCount; ++j)
             {
-                RcArrays.Copy(tile.data.verts, poly.verts[j] * 3, verts, j * 3, 3);
+                RcSpans.Copy(tile.data.verts, poly.verts[j] * 3, verts, j * 3, 3);
             }
 
             float s = frand.Next();
diff --git a/src/DotRecast.Detour/DtUtils.cs b/src/DotRecast.Detour/DtUtils.cs
index 91644e5..adb6e9f 100644
--- a/src/DotRecast.Detour/DtUtils.cs
+++ b/src/DotRecast.Detour/DtUtils.cs
@@ -145,7 +145,7 @@ namespace DotRecast.Detour
         /// @param[in] b Vertex B. [(x, y, z)]
         /// @param[in] c Vertex C. [(x, y, z)]
         /// @return The signed xz-plane area of the triangle.
-        public static float TriArea2D(float[] verts, int a, int b, int c)
+        public static float TriArea2D(Span<float> verts, int a, int b, int c)
         {
             float abx = verts[b] - verts[a];
             float abz = verts[b + 2] - verts[a + 2];
@@ -165,7 +165,7 @@ namespace DotRecast.Detour
 
         // Returns a random point in a convex polygon.
         // Adapted from Graphics Gems article.
-        public static RcVec3f RandomPointInConvexPoly(float[] pts, int npts, float[] areas, float s, float t)
+        public static RcVec3f RandomPointInConvexPoly(Span<float> pts, int npts, Span<float> areas, float s, float t)
         {
             // Calc triangle araes
             float areasum = 0.0f;
diff --git a/test/DotRecast.Detour.Test/RandomPointTest.cs b/test/DotRecast.Detour.Test/RandomPointTest.cs
index dccaf0f..c8dc58f 100644
--- a/test/DotRecast.Detour.Test/RandomPointTest.cs
+++ b/test/DotRecast.Detour.Test/RandomPointTest.cs
@@ -19,13 +19,11 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-
 using NUnit.Framework;
 
 
 namespace DotRecast.Detour.Test;
 
-
 public class RandomPointTest : AbstractDetourTest
 {
     [Test]
@@ -78,7 +76,7 @@ public class RandomPointTest : AbstractDetourTest
             randomPt = nextRandomPt;
 
             status = navmesh.GetTileAndPolyByRef(randomRef, out var tile, out var poly);
-            
+
             float[] bmin = new float[2];
             float[] bmax = new float[2];
             for (int j = 0; j < poly.vertCount; j++)