internal bool Bind()
{
if (vao == null)
{
return(false);
}
vao.Bind();
GraphicsDevice.CheckError();
return(true);
}
public VertexBuffer(GraphicsDevice graphicsDevice, Type vertexType, int vertexCount, BufferUsageHint usage = BufferUsageHint.StaticDraw)
: this(graphicsDevice, vertexCount, usage)
{
IVertexType tp = Activator.CreateInstance(vertexType) as IVertexType;
if (tp == null)
{
throw new ArgumentException("must be a vertexType");
}
this.VertexDeclaration = tp.VertexDeclaration;
ThreadingHelper.BlockOnUIThread(() =>
{
vbo = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
GL.BufferData(BufferTarget.ArrayBuffer, new IntPtr(vertexCount * VertexDeclaration.VertexStride), IntPtr.Zero, (OpenTK.Graphics.OpenGL4.BufferUsageHint)BufferUsage);
});
ThreadingHelper.BlockOnUIThread(() =>
{
vao = new VertexAttributes();
vao.vbo = vbo;
vao.Bind();
GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
VertexAttributes.ApplyAttributes(vao, VertexDeclaration);
GL.BindVertexArray(0);
}, true);
GraphicsDevice.CheckError();
}
public static void ApplyAttributes(VertexAttributes attribs, VertexDeclaration declaration)
{
attribs.Bind();
foreach (var el in declaration.VertexElements)
{
attribs.Add(el, declaration.VertexStride, declaration.InstanceDivisor);
}
GL.BindVertexArray(0);
}
public VertexBuffer(GraphicsDevice graphicsDevice, VertexDeclaration vertexDeclaration, int vertexCount, BufferUsageHint usage = BufferUsageHint.StaticDraw)
: this(graphicsDevice, vertexCount, usage)
{
this.VertexDeclaration = vertexDeclaration;
ThreadingHelper.BlockOnUIThread(() =>
{
vbo = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
GL.BufferData(BufferTarget.ArrayBuffer, new IntPtr(vertexCount * VertexDeclaration.VertexStride), IntPtr.Zero, (OpenTK.Graphics.OpenGL4.BufferUsageHint)BufferUsage);
});
ThreadingHelper.BlockOnUIThread(() =>
{
vao = new VertexAttributes();
vao.vbo = vbo;
vao.Bind();
GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
VertexAttributes.ApplyAttributes(vao, VertexDeclaration);
GL.BindVertexArray(0);
}, true);
GraphicsDevice.CheckError();
}
