VertexBuffer Class

Keeping inline with the last post, here is a class i use for rendering in my programs
I still intend on making another that uses arrays rather than lists, but this does the job for now :D

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/// <summary> /// The type of vertex to use in buffer aswell as their value in bytes /// </summary> public enum VertexFormat { XY = 8, //2D Vertex XY_COLOR = 12, //2D Vertex with color XYZ = 12, //Vertex XYZ_COLOR = 16, //VertexColor XYZ_UV = 20, //VertexUV XYZ_UV_COLOR = 24, //VertexUVColor XYZ_NORMAL_UV = 32, //VertexNormalUV XYZ_NORMAL_UV_COLOR = 36 //VertexNormalUVColor } public class VertexBuffer { public VertexFormat Format { get; private set; } public int Stride { get; private set; } public int TriangleCount { get { return index_data.Count / 3; } } public int VertexCount { get { return vertex_data.Count / Stride; } } public int ByteCount { get { return vertex_data.Count; } } public bool IsLoaded { get; private set; } public BufferUsageHint UsageHint { get; set; } public int VBO { get { return id_vbo; } } public int EBO { get { return id_ebo; } } private int id_vbo; private int id_ebo; protected List<byte> vertex_data; protected List<ushort> index_data; public byte[] Vertices { get { return vertex_data.ToArray(); } } public ushort[] Indices { get { return index_data.ToArray(); } } public VertexBuffer(VertexFormat format) { Format = format; Stride = (int)format; UsageHint = BufferUsageHint.DynamicDraw; vertex_data = new List<byte>(); index_data = new List<ushort>(); } public void Clear() { vertex_data.Clear(); index_data.Clear(); } public void SetFormat(VertexFormat format) { Format = format; Stride = (int)format; Clear(); } public void Set(byte[] vertices, ushort[] indices) { Clear(); vertex_data.AddRange(vertices); if (indices != null) index_data.AddRange(indices); } /// <summary> /// Load vertex buffer /// :: store in memory /// </summary> public void Load() { if (IsLoaded) return; int count = vertex_data.Count / Stride; //VBO GL.GenBuffers(1, out id_vbo); GL.BindBuffer(BufferTarget.ArrayBuffer, id_vbo); GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(count * Stride), vertex_data.ToArray(), UsageHint); GL.BindBuffer(BufferTarget.ArrayBuffer, 0); GL.GenBuffers(1, out id_ebo); GL.BindBuffer(BufferTarget.ElementArrayBuffer, id_ebo); GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(index_data.Count * sizeof(short)), index_data.ToArray(), UsageHint); GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0); IsLoaded = true; } /// <summary> /// Reload the buffer data without destroying the buffers pointer to OpenGL /// </summary> public void Reload() { if (!IsLoaded) return; int count = vertex_data.Count / Stride; GL.BindBuffer(BufferTarget.ArrayBuffer, id_vbo); GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(count * Stride), IntPtr.Zero, UsageHint); GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(count * Stride), vertex_data.ToArray(), UsageHint); GL.BindBuffer(BufferTarget.ArrayBuffer, 0); GL.BindBuffer(BufferTarget.ElementArrayBuffer, id_ebo); GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(index_data.Count * sizeof(short)), IntPtr.Zero, UsageHint); GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(index_data.Count * sizeof(short)), index_data.ToArray(), UsageHint); GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0); } /// <summary> /// Unload vertex buffer from OpenGL /// :: release memory /// </summary> public void Unload() { if (!IsLoaded) return; int count = vertex_data.Count / Stride; GL.BindBuffer(BufferTarget.ArrayBuffer, id_vbo); GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(count * Stride), IntPtr.Zero, UsageHint); GL.BindBuffer(BufferTarget.ElementArrayBuffer, id_ebo); GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(index_data.Count * sizeof(short)), IntPtr.Zero, UsageHint); GL.DeleteBuffers(1, ref id_vbo); GL.DeleteBuffers(1, ref id_ebo); IsLoaded = false; } public void Bind() { if (!IsLoaded) return; GL.BindBuffer(BufferTarget.ArrayBuffer, id_vbo); if (Format == VertexFormat.XY) { GL.EnableClientState(ArrayCap.VertexArray); GL.VertexPointer(2, VertexPointerType.Float, Stride, new IntPtr(0)); } else if (Format == VertexFormat.XY_COLOR) { GL.EnableClientState(ArrayCap.VertexArray); GL.EnableClientState(ArrayCap.ColorArray); GL.VertexPointer(2, VertexPointerType.Float, Stride, new IntPtr(0)); GL.ColorPointer(4, ColorPointerType.UnsignedByte, Stride, new IntPtr(8)); } else if (Format == VertexFormat.XYZ) { GL.EnableClientState(ArrayCap.VertexArray); GL.VertexPointer(3, VertexPointerType.Float, Stride, new IntPtr(0)); } else if (Format == VertexFormat.XYZ_COLOR) { GL.EnableClientState(ArrayCap.VertexArray); GL.EnableClientState(ArrayCap.ColorArray); GL.VertexPointer(3, VertexPointerType.Float, Stride, new IntPtr(0)); GL.ColorPointer(4, ColorPointerType.UnsignedByte, Stride, new IntPtr(12)); } else if (Format == VertexFormat.XYZ_UV) { GL.EnableClientState(ArrayCap.VertexArray); GL.EnableClientState(ArrayCap.TextureCoordArray); GL.VertexPointer(3, VertexPointerType.Float, Stride, new IntPtr(0)); GL.TexCoordPointer(2, TexCoordPointerType.Float, Stride, new IntPtr(12)); } else if (Format == VertexFormat.XYZ_UV_COLOR) { GL.EnableClientState(ArrayCap.VertexArray); GL.EnableClientState(ArrayCap.TextureCoordArray); GL.EnableClientState(ArrayCap.ColorArray); GL.VertexPointer(3, VertexPointerType.Float, Stride, new IntPtr(0)); GL.TexCoordPointer(2, TexCoordPointerType.Float, Stride, new IntPtr(12)); GL.ColorPointer(4, ColorPointerType.UnsignedByte, Stride, new IntPtr(20)); } else if (Format == VertexFormat.XYZ_NORMAL_UV) { GL.EnableClientState(ArrayCap.VertexArray); GL.EnableClientState(ArrayCap.NormalArray); GL.EnableClientState(ArrayCap.TextureCoordArray); GL.VertexPointer(3, VertexPointerType.Float, Stride, new IntPtr(0)); GL.NormalPointer(NormalPointerType.Float, Stride, new IntPtr(12)); GL.TexCoordPointer(2, TexCoordPointerType.Float, Stride, new IntPtr(24)); } else if (Format == VertexFormat.XYZ_NORMAL_UV_COLOR) { GL.EnableClientState(ArrayCap.VertexArray); GL.EnableClientState(ArrayCap.NormalArray); GL.EnableClientState(ArrayCap.TextureCoordArray); GL.EnableClientState(ArrayCap.ColorArray); GL.VertexPointer(3, VertexPointerType.Float, Stride, new IntPtr(0)); GL.NormalPointer(NormalPointerType.Float, Stride, new IntPtr(12)); GL.TexCoordPointer(2, TexCoordPointerType.Float, Stride, new IntPtr(24)); GL.ColorPointer(4, ColorPointerType.UnsignedByte, Stride, new IntPtr(32)); } GL.BindBuffer(BufferTarget.ElementArrayBuffer, id_ebo); GL.DrawElements(BeginMode.Triangles, index_data.Count, DrawElementsType.UnsignedShort, IntPtr.Zero); GL.DisableClientState(ArrayCap.VertexArray); GL.DisableClientState(ArrayCap.NormalArray); GL.DisableClientState(ArrayCap.TextureCoordArray); GL.DisableClientState(ArrayCap.ColorArray); } public void Dispose() { Unload(); Clear(); vertex_data = null; index_data = null; } public void Join(VertexBuffer buffer) { int count = vertex_data.Count / Stride; //Vertices vertex_data.AddRange(buffer.vertex_data.ToArray()); //Indices ushort[] indices = buffer.index_data.ToArray(); for (int i = 0; i < indices.Length; i++) { indices[i] += (ushort)count; } index_data.AddRange(indices); } /// <summary> /// Add indices in order of vertices length, /// this is if you dont want to set indices and just index from vertex-index /// </summary> public void IndexFromLength(bool cw = false) { int count = vertex_data.Count / Stride; ushort[] indices = new ushort[count]; for (int i = 0; i < count; i++) { indices[i] = (ushort)i; } if (cw) Array.Reverse(indices); AddIndices(indices); } public void AddIndex(ushort indexA, ushort indexB, ushort indexC) { index_data.Add(indexA); index_data.Add(indexB); index_data.Add(indexC); } public void AddIndices(ushort[] indices) { index_data.AddRange(indices); } /// <summary> /// XY /// </summary> /// <param name="x"></param> /// <param name="y"></param> public void AddVertex(float x, float y) { if (Format != VertexFormat.XY) throw new FormatException("vertex must be of the same format type as buffer"); vertex_data.AddRange(BitConverter.GetBytes(x)); vertex_data.AddRange(BitConverter.GetBytes(y)); } /// <summary> /// XY_COLOR /// </summary> /// <param name="x"></param> /// <param name="y"></param> /// <param name="color"></param> public void AddVertex(float x, float y, uint color) { if (Format != VertexFormat.XY_COLOR) throw new FormatException("vertex must be of the same format type as buffer"); vertex_data.AddRange(BitConverter.GetBytes(x)); vertex_data.AddRange(BitConverter.GetBytes(y)); vertex_data.AddRange(BitConverter.GetBytes(color)); } /// <summary> /// XYZ /// </summary> /// <param name="x"></param> /// <param name="y"></param> /// <param name="z"></param> public void AddVertex(float x, float y, float z) { if (Format != VertexFormat.XYZ) throw new FormatException("vertex must be of the same format type as buffer"); vertex_data.AddRange(BitConverter.GetBytes(x)); vertex_data.AddRange(BitConverter.GetBytes(y)); vertex_data.AddRange(BitConverter.GetBytes(z)); } /// <summary> /// XYZ_COLOR /// </summary> /// <param name="x"></param> /// <param name="y"></param> /// <param name="z"></param> /// <param name="color"></param> public void AddVertex(float x, float y, float z, uint color) { if (Format != VertexFormat.XYZ_COLOR) throw new FormatException("vertex must be of the same format type as buffer"); vertex_data.AddRange(BitConverter.GetBytes(x)); vertex_data.AddRange(BitConverter.GetBytes(y)); vertex_data.AddRange(BitConverter.GetBytes(z)); vertex_data.AddRange(BitConverter.GetBytes(color)); } /// <summary> /// XYZ_UV /// </summary> /// <param name="x"></param> /// <param name="y"></param> /// <param name="z"></param> /// <param name="u"></param> /// <param name="v"></param> public void AddVertex(float x, float y, float z, float u, float v) { if (Format != VertexFormat.XYZ_UV) throw new FormatException("vertex must be of the same format type as buffer"); vertex_data.AddRange(BitConverter.GetBytes(x)); vertex_data.AddRange(BitConverter.GetBytes(y)); vertex_data.AddRange(BitConverter.GetBytes(z)); vertex_data.AddRange(BitConverter.GetBytes(u)); vertex_data.AddRange(BitConverter.GetBytes(v)); } /// <summary> /// XYZ_UV_COLOR /// </summary> /// <param name="x"></param> /// <param name="y"></param> /// <param name="z"></param> /// <param name="u"></param> /// <param name="v"></param> /// <param name="color"></param> public void AddVertex(float x, float y, float z, float u, float v, uint color) { if (Format != VertexFormat.XYZ_UV_COLOR) throw new FormatException("vertex must be of the same format type as buffer"); vertex_data.AddRange(BitConverter.GetBytes(x)); vertex_data.AddRange(BitConverter.GetBytes(y)); vertex_data.AddRange(BitConverter.GetBytes(z)); vertex_data.AddRange(BitConverter.GetBytes(u)); vertex_data.AddRange(BitConverter.GetBytes(v)); vertex_data.AddRange(BitConverter.GetBytes(color)); } /// <summary> /// XYZ_NORMAL_UV /// </summary> /// <param name="x"></param> /// <param name="y"></param> /// <param name="z"></param> /// <param name="nx"></param> /// <param name="ny"></param> /// <param name="nz"></param> /// <param name="u"></param> /// <param name="v"></param> public void AddVertex(float x, float y, float z, float nx, float ny, float nz, float u, float v) { if (Format != VertexFormat.XYZ_NORMAL_UV) throw new FormatException("vertex must be of the same format type as buffer"); vertex_data.AddRange(BitConverter.GetBytes(x)); vertex_data.AddRange(BitConverter.GetBytes(y)); vertex_data.AddRange(BitConverter.GetBytes(z)); vertex_data.AddRange(BitConverter.GetBytes(nx)); vertex_data.AddRange(BitConverter.GetBytes(ny)); vertex_data.AddRange(BitConverter.GetBytes(nz)); vertex_data.AddRange(BitConverter.GetBytes(u)); vertex_data.AddRange(BitConverter.GetBytes(v)); } /// <summary> /// XYZ_NORMAL_UV_COLOR /// </summary> /// <param name="x"></param> /// <param name="y"></param> /// <param name="z"></param> /// <param name="nx"></param> /// <param name="ny"></param> /// <param name="nz"></param> /// <param name="u"></param> /// <param name="v"></param> /// <param name="color"></param> public void AddVertex(float x, float y, float z, float nx, float ny, float nz, float u, float v, uint color) { if (Format != VertexFormat.XYZ_NORMAL_UV_COLOR) throw new FormatException("vertex must be of the same format type as buffer"); vertex_data.AddRange(BitConverter.GetBytes(x)); vertex_data.AddRange(BitConverter.GetBytes(y)); vertex_data.AddRange(BitConverter.GetBytes(z)); vertex_data.AddRange(BitConverter.GetBytes(nx)); vertex_data.AddRange(BitConverter.GetBytes(ny)); vertex_data.AddRange(BitConverter.GetBytes(nz)); vertex_data.AddRange(BitConverter.GetBytes(u)); vertex_data.AddRange(BitConverter.GetBytes(v)); vertex_data.AddRange(BitConverter.GetBytes(color)); } }

Usage Example

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private VertexBuffer buffer; public void Load() { buffer = new VertexBuffer(VertexFormat.XYZ_COLOR); buffer.AddVertex( 0.0f, 0.0f, 0.0f, 0xFF0000FF); buffer.AddVertex(100.0f, 0.0f, 0.0f, 0xFF00FF00); buffer.AddVertex( 0.0f, -100.0f, 0.0f, 0xFFFF0000); buffer.AddIndices(new ushort[3] { 2, 1, 0 }); buffer.Load(); } public void Render() { GL.Translate(-50, 50, -100); buffer.Bind(); }