Fixing the Mesh struct

Examples/Models/LoadingGltf.cs

@@ -0,0 +1,123 @@
+/*******************************************************************************************
+*
+*   raylib [models] example - loading gltf
+*
+*   Example complexity rating: [★☆☆☆] 1/4
+*
+*   LIMITATIONS:
+*     - Only supports 1 armature per file, and skips loading it if there are multiple armatures
+*     - Only supports linear interpolation (default method in Blender when checked
+*       "Always Sample Animations" when exporting a GLTF file)
+*     - Only supports translation/rotation/scale animation channel.path,
+*       weights not considered (i.e. morph targets)
+*
+*   Example originally created with raylib 3.7, last time updated with raylib 4.2
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2020-2025 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+using System.Numerics;
+using System.Runtime.InteropServices;
+using static Raylib_cs.Raylib;
+
+namespace Examples.Models;
+
+public class LoadingGltf
+{
+    public static int Main()
+    {
+        // Initialization
+        //--------------------------------------------------------------------------------------
+        const int screenWidth = 800;
+        const int screenHeight = 450;
+
+        InitWindow(screenWidth, screenHeight, "raylib [models] example - loading gltf");
+
+        // Define the camera to look into our 3d world
+        Camera3D camera = new();
+        camera.Position = new Vector3(6.0f, 6.0f, 6.0f);
+        camera.Target = new Vector3(0.0f, 2.0f, 0.0f);
+        camera.Up = new Vector3(0.0f, 1.0f, 0.0f);
+        camera.FovY = 45.0f;
+        camera.Projection = CameraProjection.Perspective;
+
+        Model model = LoadModel("resources/models/gltf/robot.glb");
+        Vector3 position = new(0.0f, 0.0f, 0.0f);
+
+        // Load animation data
+        var anims = LoadModelAnimations("resources/models/gltf/robot.glb");
+
+        // Animation playing variables
+        int animIndex = 0;
+        float animCurrentFrame = 0.0f;
+
+        SetTargetFPS(60);
+        //--------------------------------------------------------------------------------------
+
+        // Main game loop
+        while (!WindowShouldClose())
+        {
+            // Update
+            //----------------------------------------------------------------------------------
+            UpdateCamera(ref camera, CameraMode.Orbital);
+
+            if (IsKeyPressed(KeyboardKey.Right))
+            {
+                animIndex = (animIndex + 1)%anims.Length;
+            }
+            else if (IsKeyPressed(KeyboardKey.Left))
+            {
+                animIndex = (animIndex + anims.Length - 1)%anims.Length;
+            }
+
+
+            // Update model animation
+            animCurrentFrame = (animCurrentFrame + 1)%anims[animIndex].KeyFrameCount;
+            UpdateModelAnimation(model, anims[animIndex], (float)animCurrentFrame);
+
+            if (animCurrentFrame >= anims[0].KeyFrameCount)
+            {
+                animCurrentFrame = 0;
+            }
+            //----------------------------------------------------------------------------------
+
+            // Draw
+            //----------------------------------------------------------------------------------
+            BeginDrawing();
+            ClearBackground(Color.RayWhite);
+
+            BeginMode3D(camera);
+
+            DrawModel(
+                model,
+                position,
+                1f,
+                Color.White
+            );
+
+            DrawGrid(10, 1.0f);
+
+            EndMode3D();
+            DrawText($"Current animation: {anims[animIndex].NameToString()}", 10, 40, 20, Color.Maroon);
+            DrawText("Use the LEFT/RIGHT keys to switch animation", 10, 10, 20, Color.Gray);
+
+            EndDrawing();
+            //----------------------------------------------------------------------------------
+        }
+
+        // De-Initialization
+        //--------------------------------------------------------------------------------------
+        UnloadModelAnimations(anims);
+        UnloadModel(model);
+
+        CloseWindow();
+        //--------------------------------------------------------------------------------------
+
+        return 0;
+    }
+}
+

Examples/Models/ModelLoading.cs

@@ -64,7 +64,7 @@ public class ModelLoading
         {
             // Update
             //----------------------------------------------------------------------------------
-            UpdateCamera(ref camera, CameraMode.Free);
+            UpdateCamera(ref camera, CameraMode.Orbital);
 
             if (IsFileDropped())
             {

Examples/Program.cs

@@ -113,6 +113,7 @@ public class ExampleList
 
         // Models
         new ExampleInfo("LoadingIqm", LoadingIqm.Main),
+        new ExampleInfo("LoadingGltf", LoadingGltf.Main),
         new ExampleInfo("BillboardDemo", BillboardDemo.Main),
         new ExampleInfo("BoxCollisions", BoxCollisions.Main),
         new ExampleInfo("CubicmapDemo", CubicmapDemo.Main),
@@ -129,6 +130,7 @@ public class ExampleList
         new ExampleInfo("SkyboxDemo", SkyboxDemo.Main),
         new ExampleInfo("WavingCubes", WavingCubes.Main),
         new ExampleInfo("YawPitchRoll", YawPitchRoll.Main),
+        new ExampleInfo("DynamicMesh", DynamicMesh.Main),
 
         // Shaders
         new ExampleInfo("BasicLighting", BasicLighting.Main),

Raylib-cs.Tests/RaylibTests.cs

@@ -40,6 +40,7 @@ public class RaylibTests
         CheckType<Transform>();
         CheckType<BoneInfo>();
         CheckType<Model>();
+        CheckType<ModelSkeleton>();
         CheckType<ModelAnimation>();
         CheckType<Ray>();
         CheckType<RayCollision>();

Raylib-cs/types/Mesh.cs

@@ -198,6 +198,16 @@ public unsafe struct Mesh
     /// </summary>
     public float* BoneWeights = default;
 
+    /// <summary>
+    /// Animated vertex positions after bones transformations, CPU skinning
+    /// </summary>
+    public float* AnimVertices = default;
+
+    /// <summary>
+    /// Animated normals after bones transformations, CPU skinning
+    /// </summary>
+    public float* AnimNormals = default;
+
     #endregion
 
     #region OpenGL identifiers