Update material_color to use Entity.

proto/gz/msgs/material_color.proto

@@ -19,35 +19,54 @@
 syntax = "proto3";
 package gz.msgs;
 option java_package = "com.gz.msgs";
-option java_outer_classname = "MaterialProtos";
+option java_outer_classname = "MaterialColorProtos";
 
 /// \ingroup gz.msgs
 /// \interface MaterialColor
 /// \brief Color description for an entities link-visual material.
 
 import "gz/msgs/color.proto";
+import "gz/msgs/entity.proto";
 import "gz/msgs/header.proto";
 
 message MaterialColor
 {
  /// \brief Optional header data
  Header header = 1;
 
- /// \brief Name of link-visual.
- string name = 2;
-
- /// \brief Name of parent enitity for link-visual.
- string parent_name = 3;
+ /// \brief Entity for which material colors are going to be modified.
+ ///
+ /// The entity should be a visual element of a link that may exist
+ /// in a world or model.
+ /// The entity name (entity.name) will be used as an scoped name.
+ /// For example, in this
+ /// hierarchy:
+ ///
+ /// world_name
+ /// model_name
+ /// link_name
+ /// visual_name
+ ///
+ /// All these names will return the link entity:
+ ///
+ /// * world_name::model_name::link_name::visual_name
+ /// * model_name::link_name::visual_name
+ /// * link_name::visual_name
+ /// * visual_name
+ Entity entity = 2;
 
  /// \brief Ambient color
- Color ambient = 4;
+ Color ambient = 3;
 
  /// \brief Diffuse color
- Color diffuse = 5;
+ Color diffuse = 4;
 
  /// \brief Specular color
- Color specular = 6;
+ Color specular = 5;
 
  /// \brief Emissive color
- Color emissive = 7;
+ Color emissive = 6;
+
+ /// \brief Specular exponent
+ double shininess = 7;
 }