feat: add chunk renderer with interleaved vertex buffer

Rendering/ChunkRenderer.cs

@@ -0,0 +1,52 @@
+using OpenTK.Graphics.OpenGL4;
+
+namespace VoxelEngine.Rendering;
+
+public sealed class ChunkRenderer : IDisposable
+{
+    private const int FloatsPerVertex = 6; // pos.xyz, uv, shade
+
+    private readonly int _vao;
+    private readonly int _vbo;
+    private readonly int _vertexCount;
+
+    public ChunkRenderer(float[] vertices)
+    {
+        _vertexCount = vertices.Length / FloatsPerVertex;
+        int stride = FloatsPerVertex * sizeof(float);
+
+        _vao = GL.GenVertexArray();
+        GL.BindVertexArray(_vao);
+
+        _vbo = GL.GenBuffer();
+        GL.BindBuffer(BufferTarget.ArrayBuffer, _vbo);
+        GL.BufferData(BufferTarget.ArrayBuffer, vertices.Length * sizeof(float), vertices, BufferUsageHint.StaticDraw);
+
+        // location 0: position (vec3) at offset 0
+        GL.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, stride, 0);
+        GL.EnableVertexAttribArray(0);
+
+        // location 1: uv (vec2) at offset 3 floats
+        GL.VertexAttribPointer(1, 2, VertexAttribPointerType.Float, false, stride, 3 * sizeof(float));
+        GL.EnableVertexAttribArray(1);
+
+        // location 2: shade (float) at offset 5 floats
+        GL.VertexAttribPointer(2, 1, VertexAttribPointerType.Float, false, stride, 5 * sizeof(float));
+        GL.EnableVertexAttribArray(2);
+
+        GL.BindVertexArray(0);
+    }
+
+    public void Draw()
+    {
+        GL.BindVertexArray(_vao);
+        GL.DrawArrays(PrimitiveType.Triangles, 0, _vertexCount);
+        GL.BindVertexArray(0);
+    }
+
+    public void Dispose()
+    {
+        GL.DeleteBuffer(_vbo);
+        GL.DeleteVertexArray(_vao);
+    }
+}