build 170810. multi-texture materials, reflection map support

material.h

@@ -0,0 +1,64 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+#pragma once
+
+#include "texture.h"
+#include "parser.h"
+
+typedef int material_handle;
+
+// a collection of parameters for the rendering setup.
+// for modern opengl this translates to set of attributes for the active shaders,
+// for legacy opengl this is basically just texture(s) assigned to geometry
+struct opengl_material {
+
+    texture_handle texture1 { NULL }; // primary texture, typically diffuse+apha
+    texture_handle texture2 { NULL }; // secondary texture, typically normal+reflection
+
+    bool has_alpha { false }; // alpha state, calculated from presence of alpha in texture1
+    std::string name;
+// methods:
+    bool
+        deserialize( cParser &Input, bool const Loadnow );
+private:
+    // imports member data pair from the config file
+    bool
+        deserialize_mapping( cParser &Input, bool const Loadnow );
+};
+
+class material_manager {
+
+public:
+    material_manager() { m_materials.emplace_back( opengl_material() ); } // empty bindings for null material
+
+    material_handle
+        create( std::string const &Filename, bool const Loadnow );
+    opengl_material const &
+        material( material_handle const Material ) const { return m_materials[ Material ]; }
+
+private:
+// types
+    typedef std::vector<opengl_material> material_sequence;
+    typedef std::unordered_map<std::string, std::size_t> index_map;
+// methods:
+    // checks whether specified texture is in the texture bank. returns texture id, or npos.
+    material_handle
+        find_in_databank( std::string const &Materialname ) const;
+    // checks whether specified file exists. returns name of the located file, or empty string.
+    std::string
+        find_on_disk( std::string const &Materialname ) const;
+// members:
+    material_handle const npos { -1 };
+    material_sequence m_materials;
+    index_map m_materialmappings;
+
+};
+
+//---------------------------------------------------------------------------