private void SimpleCube_Load(object sender, EventArgs e)
{
DoubleBuffered = false;
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.OptimizedDoubleBuffer, false);
SetStyle(ControlStyles.Opaque, true);
AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
Size = new Size(800, 600);
_WGLContext = Ratchet.Drawing.OpenGL.WGL.CreateContext(this);
_Context = Ratchet.Drawing.OpenGL.glContext.CreateContextFromWGLContext(_WGLContext);
_Context.MakeCurrent();
_Context.Enable(Ratchet.Drawing.OpenGL.glContext.Capability.GL_DEBUG_OUTPUT);
_Context.DebugMessageCallback((int source, int id, int type, int severity, string message) =>
{
Console.WriteLine(message);
});
_VertexBuffer = _Context.GenBuffer();
_VertexBuffer.BindBuffer(Ratchet.Drawing.OpenGL.glBuffer.BindTarget.GL_ARRAY_BUFFER);
float[] triangles = new float[] { -0.5f, -0.5f, -0.5f, 1.0f, // Vertex 0 Position
1.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, // Vertex 1 Position
0.0f, 1.0f,
0.5f, 0.5f, -0.5f, 1.0f, // Vertex 2 Position
0.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 1.0f, // Vertex 3 Position
1.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 1.0f, // Vertex 4 Position
1.0f, 1.0f,
0.5f, -0.5f, 0.5f, 1.0f, // Vertex 5 Position
0.0f, 1.0f,
0.5f, 0.5f, 0.5f, 1.0f, // Vertex 6 Position
0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, // Vertex 7 Position
1.0f, 0.0f, };
_VertexBuffer.BufferData(Ratchet.Drawing.OpenGL.glBuffer.BindTarget.GL_ARRAY_BUFFER, sizeof(float) * triangles.Length, triangles, Ratchet.Drawing.OpenGL.glBuffer.Usage.GL_STATIC_DRAW);
_IndexBuffer = _Context.GenBuffer();
_IndexBuffer.BindBuffer(Ratchet.Drawing.OpenGL.glBuffer.BindTarget.GL_ELEMENT_ARRAY_BUFFER);
/// 7 --- 6
/// / /|
/// 3 --- 2 5
/// | |/
/// 0 --- 1
_IndexBuffer.BufferData(Ratchet.Drawing.OpenGL.glBuffer.BindTarget.GL_ELEMENT_ARRAY_BUFFER, sizeof(int) * 36, new int[] { 0, 1, 2, 0, 2, 3,
4, 5, 6, 4, 6, 7,
0, 1, 4, 1, 4, 5,
2, 7, 3, 2, 7, 6,
1, 6, 2, 1, 6, 5,
0, 7, 3, 0, 7, 4, }, Ratchet.Drawing.OpenGL.glBuffer.Usage.GL_STATIC_DRAW);
var vertexShader = _Context.CreateShader(Ratchet.Drawing.OpenGL.glShader.Type.GL_VERTEX_SHADER, vertexShaderSource);
var fragmentShader = _Context.CreateShader(Ratchet.Drawing.OpenGL.glShader.Type.GL_FRAGMENT_SHADER, fragmentShaderSource);
_Shader = _Context.CreateProgram();
_Shader.AttachShader(vertexShader);
_Shader.AttachShader(fragmentShader);
_Shader.LinkProgram();
_Context.Viewport(0, 0, Width, Height);
_Projection = mat4.Perspective(2.8f, (float)Width / (float)Height, 0.01f, 10.0f);
_Lookat = mat4.LookAt(new vec3(0.0f, 0.2f, -2.0f), new vec3(0.1f, 0.1f, 0.1f), new vec3(0.0f, 1.0f, 0.0f));
_Context.Enable(Ratchet.Drawing.OpenGL.glContext.Capability.GL_DEPTH_TEST);
_Context.DepthFunc(Ratchet.Drawing.OpenGL.glContext.DepthFuncion.GL_LEQUAL);
}
