replace hard coded default gold with material_colors.h

Former-commit-id: ccf11418ec55f618823b0a3d7bd9015b259af3c7

include/igl/viewer/ViewerData.cpp

@@ -11,6 +11,7 @@
 #include <iostream>
 
 #include <igl/per_face_normals.h>
+#include <igl/material_colors.h>
 #include <igl/per_vertex_normals.h>
 
 #ifdef ENABLE_SERIALIZATION
@@ -104,9 +105,10 @@ IGL_INLINE void igl::viewer::ViewerData::set_mesh(const Eigen::MatrixXd& _V, con
     F = _F;
 
     compute_normals();
-    uniform_colors(Eigen::Vector3d(51.0/255.0,43.0/255.0,33.3/255.0),
-                   Eigen::Vector3d(255.0/255.0,228.0/255.0,58.0/255.0),
-                   Eigen::Vector3d(255.0/255.0,235.0/255.0,80.0/255.0));
+    uniform_colors(
+      Eigen::Vector3d(GOLD_AMBIENT[0], GOLD_AMBIENT[1], GOLD_AMBIENT[2]),
+      Eigen::Vector3d(GOLD_DIFFUSE[0], GOLD_DIFFUSE[1], GOLD_DIFFUSE[2]),
+      Eigen::Vector3d(GOLD_SPECULAR[0], GOLD_SPECULAR[1], GOLD_SPECULAR[2]));
 
     grid_texture();
   }

include/igl/viewer/ViewerData.h

@@ -108,7 +108,10 @@ public:
   IGL_INLINE void compute_normals();
 
   // Assigns uniform colors to all faces/vertices
-  IGL_INLINE void uniform_colors(Eigen::Vector3d ambient, Eigen::Vector3d diffuse, Eigen::Vector3d specular);
+  IGL_INLINE void uniform_colors(
+    Eigen::Vector3d ambient, 
+    Eigen::Vector3d diffuse, 
+    Eigen::Vector3d specular);
 
   // Generates a default grid texture
   IGL_INLINE void grid_texture();