public int ReadRange <T>(T[] buffer, int offset, int numElems)
where T : struct
{
if (!mCanRead)
{
throw new NotSupportedException("Optix Error: BufferStream: Cannot read from non Output Optix buffers");
}
var elemSize = Marshal.SizeOf <T>();
var sizeInBytes = numElems * elemSize;
//perform some validation steps
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (offset < 0)
{
throw new ArgumentOutOfRangeException("offset");
}
if (sizeInBytes < 0 || (offset + sizeInBytes > buffer.Length * elemSize))//
{
throw new ArgumentOutOfRangeException("numElems");
}
var validSize = Math.Min(mSize - mPosition, sizeInBytes);
var l = GCHandle.Alloc(buffer, GCHandleType.Pinned);
var bufferSpan = new Span <T>(buffer, offset, numElems);
MemoryHelper.CopyFromUnmanaged(new IntPtr(this.Buffer.ToInt64() + mPosition), ref bufferSpan, (uint)numElems);
l.Free();
mPosition += validSize;
return((int)validSize);
}
public void WriteRange <T>(T[] buffer, int offset, int numElems)
where T : struct
{
if (!mCanWrite)
{
throw new NotSupportedException("Optix Error: BufferStream: Cannot write to non Input Optix buffers");
}
var elemSize = Marshal.SizeOf <T>();
var sizeInBytes = numElems * elemSize;
//perform some validation steps
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (offset < 0)
{
throw new ArgumentOutOfRangeException("offset");
}
if (sizeInBytes < 0 || (offset + numElems > buffer.Length))
{
throw new ArgumentOutOfRangeException("numElems", buffer.Length, $"Buffer length < {offset + sizeInBytes}");
}
if (mPosition + sizeInBytes > mSize)
{
throw new EndOfStreamException();
}
var buffSpan = new Span <T>(buffer, offset, numElems);
MemoryHelper.CopyFromUnmanaged(new IntPtr(this.Buffer.ToInt64() + mPosition), ref buffSpan, (uint)sizeInBytes);
mPosition += sizeInBytes;
}
public void GetBaryCentricOutput(Vector2[] output)
{
if (output.Length != mCurrentNumRays)
{
throw new ArgumentOutOfRangeException("output", "Output array must equal number of rays set on the Traversal object");
}
IntPtr outputData = IntPtr.Zero;
CheckError(TraversalApi.rtuTraversalMapOutput(mTraversal, RTUoutput.RTU_OUTPUT_BARYCENTRIC, ref outputData));
if (outputData == IntPtr.Zero)
{
throw new OptixException("Traversal Error: NormalOutput buffer cannot be mapped");
}
var lc = GCHandle.Alloc(output, GCHandleType.Pinned);
var span = new Span <Vector2>(output);
MemoryHelper.CopyFromUnmanaged(outputData, ref span, (uint)mCurrentNumRays);
CheckError(TraversalApi.rtuTraversalUnmapOutput(mTraversal, RTUoutput.RTU_OUTPUT_BARYCENTRIC));
lc.Free();
}