public override void SetData <T>(T[] data, int startIndex, int elementCount)
{
if (_usage == VertexBufferUsage.Static)
{
throw new Exception("Can't update a vertex buffer created as Static");
}
GL.GetError();
GL.BindBuffer(BufferTarget.ArrayBuffer, _buffer);
System.Runtime.InteropServices.GCHandle handle = System.Runtime.InteropServices.GCHandle.Alloc(data, System.Runtime.InteropServices.GCHandleType.Pinned);
try
{
IntPtr pointer = handle.AddrOfPinnedObject();
int size = System.Runtime.InteropServices.Marshal.SizeOf(typeof(T));
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(elementCount * size), Gk3Main.Utils.IncrementIntPtr(pointer, size * startIndex), (BufferUsageHint)convertUsage(_usage));
}
finally
{
if (handle.IsAllocated)
{
handle.Free();
}
}
GlException.ThrowExceptionIfErrorExists();
}
private void setupVertexBufferPointers()
{
for (int i = 0; i < _vertexDeclaration.Elements.Length; i++)
{
GlslEffect.Attribute attrib = _currentEffect.GetAttribute(_vertexDeclaration.Elements[i].Usage, _vertexDeclaration.Elements[i].UsageIndex);
if (GlslEffect.Attribute.IsValidAttribute(attrib) == false)
{
continue;
}
GL.EnableVertexAttribArray(attrib.GlHandle);
GlException.ThrowExceptionIfErrorExists();
GL.VertexAttribPointer(attrib.GlHandle, (int)_vertexDeclaration.Elements[i].Format, VertexAttribPointerType.Float, false, _vertexDeclaration.Stride,
Gk3Main.Utils.IncrementIntPtr(IntPtr.Zero, _vertexDeclaration.Elements[i].Offset));
GlException.ThrowExceptionIfErrorExists();
}
GlException.ThrowExceptionIfErrorExists();
// disable the rest
// TODO: we need to figure out what the maximum number of vertex elements is and use that!
for (int i = _vertexDeclaration.Elements.Length; i < 12; i++)
{
// Gl.glDisableVertexAttribArray(i);
}
_vertexPointersNeedSetup = false;
}
public void SetVertexBuffer(VertexBuffer buffer)
{
GL.GetError();
_vertexPointersNeedSetup = true;
_vertexDeclaration = buffer.VertexElements;
GlVertexBuffer glVertices = (GlVertexBuffer)buffer;
glVertices.Bind();
GlException.ThrowExceptionIfErrorExists();
_currentVertexBuffer = glVertices;
}
public void Bind()
{
GL.GetError();
GL.BindBuffer(BufferTarget.ArrayBuffer, _buffer);
GlException.ThrowExceptionIfErrorExists();
}