Adding Blinn fitting for the retro

sources/xml/3d/retro/3M_jaune_blinn.xml

+<?xml version="1.0"?>
+<alta>
+   <!-- This script file compute the fitting of the retro-reflecting materials present in
+        the ALTA library. This script file should be executed in the sources directory of
+		  repository as all directories are relative.
+
+        It is also necessary to create a results/3d/retro directory to store the resulting
+        fits and exports to BRDF-explorer and matlab.
+   -->
+	<configuration>
+		<parameter name="lib-dir" value="./build" />
+	</configuration>
+
+	<!-- Fit the data to a Blinn BRDF model -->
+	<action name="data2brdf">
+
+		<!-- Input and output arguments of the action -->
+		<input name="../papers/retro/mesures/original/3M_jaune/3d/633nm/Fichiers\ definitifs/3M_jaune_3D+3DS+3DR_BRDF_dense__nbsgrid_162.alta" />
+		<output name="./results/3d/retro/3M_jaune_blinn.brdf" />
+
+		<!-- Define the function to use -->
+		<function name="nonlinear_function_diffuse" />
+		<function name="nonlinear_function_blinn">
+			<parameter name="fresnel" value="./build/libnonlinear_fresnel_schlick.so"/>
+		</function>
+		<function name="nonlinear_function_retroblinn" />
+
+		<!-- Define the ftting procedure to use -->
+		<plugin type="fitter" name="nonlinear_fitter_ceres" />
+
+		<!-- Parameters -->
+		<parameter name="min" value="[0.1, -2, -2]" />
+		<parameter name="max" value="[1.7,  0,  2]" />
+	</action>
+	<action name="data2brdf">
+
+		<!-- Input and output arguments of the action -->
+		<input name="../papers/retro/mesures/original/3M_jaune/3d/633nm/Fichiers\ definitifs/3M_jaune_3D+3DS+3DR_BRDF_dense__nbsgrid_162.alta" />
+		<output name="./results/3d/retro/3M_jaune_blinn.brdf" />
+
+		<!-- Define the function to use -->
+		<function name="nonlinear_function_diffuse" />
+		<function name="nonlinear_function_blinn">
+			<parameter name="fresnel" value="./build/libnonlinear_fresnel_schlick.so"/>
+			<parameter name="fixed" value="" />
+		</function>
+		<function name="nonlinear_function_retroblinn">
+			<!--<parameter name="fixed" value="" />-->
+		</function>
+
+		<!-- Define the ftting procedure to use -->
+		<plugin type="fitter" name="nonlinear_fitter_ceres" />
+
+		<!-- Parameters -->
+		<parameter name="min" value="[0.1, -2, -2]" />
+		<parameter name="max" value="[1.7,  2,  2]" />
+		<parameter name="bootstrap" value="./results/3d/retro/3M_jaune_blinn.brdf" />
+	</action>
+	<action name="data2brdf">
+
+		<!-- Input and output arguments of the action -->
+		<input name="../papers/retro/mesures/original/3M_jaune/3d/633nm/Fichiers\ definitifs/3M_jaune_3D+3DS+3DR_BRDF_dense__nbsgrid_162.alta" />
+		<output name="./results/3d/retro/3M_jaune_blinn.brdf" />
+
+		<!-- Define the function to use -->
+		<function name="nonlinear_function_diffuse" />
+		<function name="nonlinear_function_blinn">
+			<parameter name="fresnel" value="./build/libnonlinear_fresnel_schlick.so"/>
+			<parameter name="fixed" value="" />
+		</function>
+		<function name="nonlinear_function_retroblinn">
+			<parameter name="fresnel" value="./build/libnonlinear_fresnel_retroschlick.so"/>
+			<!--<parameter name="fixed" value="" />-->
+		</function>
+
+		<!-- Define the ftting procedure to use -->
+		<plugin type="fitter" name="nonlinear_fitter_ceres" />
+
+		<!-- Parameters -->
+		<parameter name="min" value="[0.1, -2, -2]" />
+		<parameter name="max" value="[1.7,  2,  2]" />
+		<parameter name="bootstrap" value="./results/3d/retro/3M_jaune_blinn.brdf" />
+	</action>
+	
+	<!-- Export the fit -->
+	<action name="brdf2gnuplot">
+		
+		<!-- Input and output arguments of the action -->
+		<input  name="./results/3d/retro/3M_jaune_blinn.brdf" />
+		<output name="./results/3d/retro/3M_jaune_blinn.dat" />
+
+		<parameter name="data" value="../papers/retro/mesures/original/3M_jaune/3d/633nm/Fichiers\ definitifs/3M_jaune_3D+3DS+3DR_BRDF_dense__nbsgrid_162.alta" />
+		
+		<parameter name="min" value="[0.1, -2, -2]" />
+		<parameter name="max" value="[1.7,  2,  2]" />
+	</action>
+
+
+</alta>