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 void Resize(int vertexCount, bool keepData = false)
{
int tempVBO = 0;
ThreadingHelper.BlockOnUIThread(() =>
{
tempVBO = GL.GenBuffer();
vao.Bind();
GL.BindBuffer(BufferTarget.ArrayBuffer, tempVBO);
GL.BufferData(BufferTarget.ArrayBuffer, new IntPtr(vertexCount * VertexDeclaration.VertexStride), IntPtr.Zero, (OpenTK.Graphics.OpenGL4.BufferUsageHint)BufferUsage);
});
ThreadingHelper.BlockOnUIThread(() =>
{
VertexAttributes.ApplyAttributes(vao, VertexDeclaration);
GL.BindVertexArray(0);
this.VertexCount = vertexCount;
GL.DeleteBuffer(vbo);
vbo = tempVBO;
}, true, this); /*
* ThreadingHelper.BlockOnUIThread(() =>
* {
*
* }, true);*/
if (keepData)
{
//TODO:
throw new NotImplementedException();
}
}
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);
}
internal void EnsureVAO()
{
if (vao != null && vao.vbo != vbo)
{
vao.vbo = vbo;
vao.Bind();
GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
VertexAttributes.ApplyAttributes(vao, VertexDeclaration);
GL.BindVertexArray(0);
}
}
internal void EnsureVAO()
{
if (vao != null && vao.vbo != vbo)
{
vao.vbo = vbo;
vao.Bind();
GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
VertexAttributes.ApplyAttributes(vao, VertexDeclaration);
GL.BindVertexArray(0);
if (tempVBO == -1)
{
return;
}
GL.DeleteBuffer(tempVBO);
tempVBO = -1;
}
}
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();
}