Added missing files.

ExampleScenes/GcloudRenderer/BuildOI.m

+% Build and ISET Optical Image.
+%   @param photons h x w x 31 multi-spectral radiance matrix
+%   @param depthMap h x w depth matrix
+%   @param oiParams struct of extra optical image params
+function oi = BuildOI(photons, depthMap, oiParams)
+
+%% New optical image with photon and depth data.
+oi = oiCreate;
+oi = initDefaultSpectrum(oi);
+oi = oiSet(oi, 'depthmap', depthMap);
+
+% need to truncate and scale photon data for some reason?
+oi = oiSet(oi, 'photons', single(photons));
+
+%% Transfer various lens parameters to optical image.
+if strcmp(oiParams.lensType, 'realisticDiffraction')
+    oi = oiSet(oi, 'optics name', oiParams.specFile);
+    oi = oiSet(oi, 'optics fnumber', oiParams.filmDistance / oiParams.apertureDiameter);
+    
+elseif strcmp(oiParams.lensType, 'PinholeLens') % TODO: What are the real names for this in PBRT?
+    % Pinholes have no real aperture size.  So, we set the f-number
+    % really big.
+    oi = oiSet(oi, 'optics name', 'pinhole');
+    oi = oiSet(oi, 'optics fnumber', 999);
+    
+elseif strcmp(oiParams.lensType, 'IdealLens') % TODO: What are the real names for this in PBRT?
+    % This case is a diffraction limited lens but with an aperture of a
+    % real size.
+    oi = oiSet(oi, 'optics name', 'diffraction limited');
+    oi = oiSet(oi, 'optics fnumber', oiParams.filmDistance / oiParams.apertureDiameter);
+    
+else
+    fprintf('Could not find lens type in hints! Setting arbitrary values.\n')
+    % TODO: What sort of arbitrary values should go here?
+    
+end
+
+oi = oiSet(oi, 'optics focal length', oiParams.filmDistance * 1e-3);
+
+% Compute the horizontal field of view
+x = size(photons, 1);
+y = size(photons, 2);
+d = sqrt(x^2 + y^2);  % Number of samples along the diagonal
+fwidth= (oiParams.filmDiag / d) * x;    % Diagonal size by d gives us mm per step
+
+% multiplying by x gives us the horizontal mm
+% Calculate angle in degrees
+fov = 2 * atan2d(fwidth / 2, oiParams.filmDistance);
+
+% Store the horizontal field of view in degrees in the oi
+oi = oiSet(oi, 'fov', fov);