-added VertexBufferObject (Efficient OpenGL Rendering)

bbiwarg/Graphics/VertexBufferObject.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Drawing;
+using OpenTK;
+using OpenTK.Graphics.OpenGL;
+using MathNet.Numerics.LinearAlgebra.Single;
+
+
+namespace bbiwarg.Graphics
+{
+    class VertexBufferObject : GameWindow
+    {
+        int VBOid = new int();
+        int IBOid = new int();
+        float[] vertices;
+        uint[] triangles;
+
+        static void Main(string[] args)
+        {
+            VertexBufferObject demo = new VertexBufferObject();
+            demo.initSource();
+            demo.Run(30);
+        }
+
+        public void initSource()
+        {
+
+            GL.EnableClientState(ArrayCap.VertexArray);
+
+            vertices = new float[] {
+                1.0f, 0.0f, 0.0f, 
+                0.0f, 0.0f, -5.0f,
+                
+                0.0f, 1.0f, 0.0f,
+                0.0f, 1.0f, -5.0f, 
+                
+                0.0f, 0.0f, 1.0f,
+                1.0f, 0.0f, -5.0f};
+            triangles = new uint[] { 0, 1, 2 };
+
+
+
+            GL.GenBuffers(1, out VBOid);
+            GL.GenBuffers(1, out IBOid);
+
+            GL.BindBuffer(BufferTarget.ArrayBuffer, VBOid);
+            GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(vertices.Length * sizeof(float)), vertices, BufferUsageHint.StreamDraw);
+            GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
+
+
+            GL.BindBuffer(BufferTarget.ElementArrayBuffer, IBOid);
+            GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(triangles.Length * sizeof(int)), triangles, BufferUsageHint.StaticDraw);
+            GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
+
+
+            //GL.DeleteBuffers(1, ref VBOid); GL.DeleteBuffers(1, ref IBOid);
+
+        }
+
+        protected override void OnLoad(EventArgs e)
+        {
+            base.OnLoad(e);
+            Title = "vbo test";
+            GL.ClearColor(Color.Black);
+        }
+
+        protected override void OnRenderFrame(FrameEventArgs e)
+        {
+            base.OnRenderFrame(e);
+
+            GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
+            Matrix4 modelview = Matrix4.LookAt(Vector3.Zero, -Vector3.UnitZ, Vector3.UnitY);
+            GL.MatrixMode(MatrixMode.Modelview);
+            GL.LoadMatrix(ref modelview);
+
+            GL.Color3(Color.Red);
+
+            GL.BindBuffer(BufferTarget.ArrayBuffer, VBOid);
+            GL.BindBuffer(BufferTarget.ElementArrayBuffer, IBOid);
+
+            GL.InterleavedArrays(InterleavedArrayFormat.C3fV3f, 0, IntPtr.Zero);
+            GL.DrawElements(BeginMode.Triangles, triangles.Length, DrawElementsType.UnsignedInt, 0);
+
+            GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
+            GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
+
+            SwapBuffers();
+        }
+
+        protected override void OnResize(EventArgs e)
+        {
+            base.OnResize(e);
+            GL.Viewport(ClientRectangle.X, ClientRectangle.Y, ClientRectangle.Width, ClientRectangle.Height);
+            Matrix4 projection = Matrix4.CreatePerspectiveFieldOfView((float)Math.PI / 4, Width / (float)Height, 1.0f, 3000.0f);
+            GL.MatrixMode(MatrixMode.Projection);
+            GL.LoadMatrix(ref projection);
+        }
+    }
+}

bbiwarg/bbiwarg.csproj

@@ -66,6 +66,7 @@
     <Compile Include="Graphics\IGraphicElement.cs" />
     <Compile Include="Graphics\Point.cs" />
     <Compile Include="Graphics\Vertex.cs" />
+    <Compile Include="Graphics\VertexBufferObject.cs" />
     <Compile Include="Main\OutputTest.cs" />
     <Compile Include="Graphics\Output.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />