Hi,
I'm implementing CSM using GPU Gems 3 : Parallel-Split Shadow Maps (DX10 / Geometry Shader method) , and I have two serious issues :
1) I can't visualize my shadow maps with PIX (surface cannot be shown message) (R32_TYPELESS format)
2) I don't know what is the good way to upload a matrix array (light view / projection matrices). I do this :

(3 splits here , CSM_MAXSPLITS=8)

in the shader :

row_major matrix g_CSM_VP[CSM_MAXSPLITS];


(this is a global variable, it isn't in a tbuffer or in a cbuffer)

in the c++ program:

ID3D10EffectMatrixVariable* g_pCSMMatrices;
D3DXMATRIX g_CSMMatrices[CSM_MAXSPLITS];

.....
->[for each frame : ]
[computation of light view/proj matrices]
g_pCSMMatrices->SetMatrixArray((float *)g_CSMMatrices,0,csm.nbSplits);



I get the following warning when debugging :
D3D10: WARNING: ID3D10Device::DrawIndexedInstanced: The size of the Constant Buffer at slot 0 of the Geometry Shader unit is too small (192 bytes provided, 512 bytes, at least, expected). This is OK, as out-of-bounds reads are defined to return 0. It is also possible the developer knows the missing data will not be used anyway. This is only a problem if the developer actually intended to bind a sufficiently large Constant Buffer for what the shader expects. [ EXECUTION WARNING #351: DEVICE_DRAW_CONSTANT_BUFFER_TOO_SMALL ]


I tried :

g_pCSMMatrices->SetMatrixArray((float *)g_CSMMatrices,0,CSM_MAXSPLITS);

.. but get exactly the same message (?)

And I get a black screen (my background)

Any help would be greatly greatly appreciated

Nico

Hello and thank you MJP

In fact I was about to delete my post because I made a mistake. I misunderstood the array packing rule and thought we cannot put variables bigger than 4 floats in an array
I just put my matrix array in an existing constant buffer and warnings vanished

Bye
Nico (previously Adaline)