private void PickingLastLineInLineLoop(out uint[] vertexIds, out vec3[] positions)
{
const int vertexCount = 2;
VertexBuffer buffer = this.Renderer.PickingRenderUnit.PositionBuffer;
var offsets = new int[vertexCount] {
(buffer.VertexCount - 1) * buffer.Config.GetDataSize() * buffer.Config.GetDataTypeByteLength(), 0,
};
vertexIds = new uint[vertexCount];
positions = new vec3[vertexCount];
buffer.Bind();
for (int i = 0; i < vertexCount; i++)
{
IntPtr pointer = buffer.MapBufferRange(
offsets[i],
1 * buffer.Config.GetDataSize() * buffer.Config.GetDataTypeByteLength(),
MapBufferRangeAccess.MapReadBit, false);
unsafe
{
var array = (vec3 *)pointer.ToPointer();
positions[i] = array[0];
}
buffer.UnmapBuffer(false);
vertexIds[i] = (uint)offsets[i] / (uint)(buffer.Config.GetDataSize() * buffer.Config.GetDataTypeByteLength());
}
buffer.Unbind();
}
protected vec3[] FillPickedGeometrysPosition(uint[] indexes)
{
var positions = new vec3[indexes.Length];
VertexBuffer buffer = this.Renderer.PositionBuffer;
buffer.Bind();
for (int i = 0; i < indexes.Length; i++)
{
int offset = (int)(indexes[i] * buffer.Config.GetDataSize() * buffer.Config.GetDataTypeByteLength());
//IntPtr pointer = GL.MapBuffer(BufferTarget.ArrayBuffer, MapBufferAccess.ReadOnly);
IntPtr pointer = buffer.MapBufferRange(
offset,
1 * buffer.Config.GetDataSize() * buffer.Config.GetDataTypeByteLength(),
MapBufferRangeAccess.MapReadBit, false);
if (pointer.ToInt64() != 0)
{
unsafe
{
var array = (vec3 *)pointer.ToPointer();
positions[i] = array[0];
}
}
else
{
ErrorCode error = (ErrorCode)GL.Instance.GetError();
if (error != ErrorCode.NoError)
{
Debug.WriteLine(string.Format(
"Error:[{0}] glMapBufferRange failed: buffer ID: [{1}]", error, buffer.BufferId.ToString()));
}
}
buffer.UnmapBuffer(false);
}
buffer.Unbind();
return(positions);
}
