/// <summary>
/// Creates a new instance of <see cref="VertexArray"/>.
/// </summary>
/// <param name="vb">The <see cref="VertexBuffer"/> and <see cref="IndexBuffer"/> required to create the <see cref="VertextArray"/>.</param>
/// <param name="ib">The <see cref="IndexBuffer"/> that describes the layout of the <see cref="VertextBuffer"/> for the <see cref="VertexArray"/>.</param>
public VertexArray(VertexArrayBuffer <T> vb, IndexBuffer ib)
{
if (vb is null)
{
throw new ArgumentNullException(nameof(vb), "The param must not be null");
}
if (ib is null)
{
throw new ArgumentNullException(nameof(ib), "The param must not be null");
}
ID = GL.GenVertexArray();
Bind();
GL.BindBuffer(BufferTarget.ArrayBuffer, vb.ID);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, ib.ID);
//Setup aPosition attribute
GL.EnableVertexArrayAttrib(ID, 0);
GL.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, 9 * sizeof(float), 0);
//Setup aTexCoord attribute
GL.EnableVertexArrayAttrib(ID, 1);
GL.VertexAttribPointer(1, 2, VertexAttribPointerType.Float, false, 9 * sizeof(float), 3 * sizeof(float));
//Setup u_TintClr attribute
GL.EnableVertexArrayAttrib(ID, 2);
GL.VertexAttribPointer(2, 4, VertexAttribPointerType.Float, false, 9 * sizeof(float), 5 * sizeof(float));
}
public Renderer(int renderSurfaceWidth, int renderSurfaceHeight)
{
Shader = new ShaderProgram("shader.vert", "shader.frag");
_renderSurfaceWidth = renderSurfaceWidth;
_renderSurfaceHeight = renderSurfaceHeight;
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
GL.ClearColor(0.2f, 0.3f, 0.3f, 1.0f);//TODO: Allow changing of this
Shader.UseProgram();
InitBufferData();
_vertexBuffer = new VertexArrayBuffer <QuadBufferData>(_vertexBufferData);
_indexBuffer = new IndexBuffer(new uint[] { 0, 1, 3, 1, 2, 3, 4, 5 });
_vertexArray = new VertexArray <QuadBufferData>(_vertexBuffer, _indexBuffer);
}
