LightingDemo, SlimDX Error

[GrimGX]

Hi Eric,

Thanks for the awesome code, it is really helping me make the move from XNA.

I am having a small issue in the LightDemo project, perhaps you can explain why.

In the DrawScene method you have the following code:

var array = Util.GetArray(_dirLight);
_fxDirLight.SetRawValue(new DataStream(array, false, false), array.Length);

All is well until it tries to set the array as "Util.GetArray(_pointLight)" and call _fxPointLight.SetRawValue()

At the SetRawValue call an object reference error is thrown by SlimDX.

I looked it up and came across that section of the tutorial. Someone left a comment there saying that they had a similar issue and that they resolved if by initializing a new array with the size [1024] for each of these calls. I tried that and it did not work (Same Error).

Please let me know if you can help and thanks again for the awesome tutorials.

Regards,
George

[vicdxxx]

Hi, @ericrrichards
Are you solve this problem?
I found a way bypass this problem, just modify byte array length to suit actual size:
public static byte[] GetArray(object o) {
var len = Marshal.SizeOf(o);
_unmanagedStaging = new byte[len];
Array.Clear(_unmanagedStaging, 0, _unmanagedStaging.Length);
if (len >= _unmanagedStaging.Length) {
_unmanagedStaging = new byte[len];
}
var ptr = Marshal.AllocHGlobal(len);
Marshal.StructureToPtr(o, ptr, true);
Marshal.Copy(ptr, _unmanagedStaging, 0, len);
Marshal.FreeHGlobal(ptr);
return _unmanagedStaging;
}