internal void Bind(GraphicsDevice graphicsDevice, IntPtr source)
{
if (_lastUsed == this && _lastUsedPointer == source && _lastUsedShader == graphicsDevice.ActiveShader)
return;
for (int i = 0; i < graphicsDevice.ActiveShader.Input.Length; i++)
{
VertexElement element = null;
ShaderInput input = graphicsDevice.ActiveShader.Input[i];
for (int j = 0; j < _vertexElements.Length; j++)
{
if (_vertexElements[j].VertexElementUsage == input.Usage && _vertexElements[j].UsageIndex == input.UsageIndex)
{
element = _vertexElements[j];
break;
}
}
if (element != null)
{
GL.EnableVertexAttribArray(input.Index);
GL.VertexAttribPointer(input.Index, element.ElementCount, element.VertexAttribPointerType, !element.IsNormalized, VertexStride, source + element.Offset);
}
else
{
GL.DisableVertexAttribArray(input.Index);
}
}
_lastUsed = this;
_lastUsedPointer = source;
_lastUsedShader = graphicsDevice.ActiveShader;
}
public VertexBuffer(GraphicsDevice graphicsDevice, VertexDeclaration vertexDeclaration, int vertexCount, BufferUsage usage)
: base(graphicsDevice, BufferTarget.ArrayBuffer, vertexDeclaration.VertexStride, vertexCount, usage)
{
VertexDeclaration = vertexDeclaration;
}
public static void ResetLastUsedCache()
{
_lastUsed = null;
_lastUsedPointer = IntPtr.Zero;
_lastUsedShader = null;
}
