deprecate passing callback to Animation; add an update function to Sprite for running frame by frame animation; rename log's ERROR to ERR to avoid conflict with windows.h

src/Animation.cpp

@@ -53,7 +53,7 @@ bool Animation::playing(bool include_delay) const
     return play_state && !paused && (include_delay || delay <= 0);
 }
 
-void Animation::update(float timestamp)
+bool Animation::update(float timestamp)
 {
     timer.update(timestamp);
     if (playing())
@@ -81,7 +81,7 @@ void Animation::update(float timestamp)
                 {
                     overflow = 0;
                 }
-            }
+                return true;
-        }
+            } } }
-    }
+    return false;
 }

src/Animation.hpp

@@ -24,14 +24,19 @@ private:
 
     bool play_state = false, ending = false, paused = false;
     float delay = 0.0f, overflow = 0.0f, _frame_length = 0.0f, previous_step_time = 0.0f;
-    Callback step = nullptr;
     sb::Timer timer;
+    Callback step = [](){};
 
 public:
 
     Animation();
 
     /*!
+     * @deprecated It is preferable to use the default constructor, provide a frame length using Animation::frame_length(float), and
+     * omit the callback function. This is because storing the callback function in this object can create copying issues when
+     * std::bind is used to create the callback. Instead, check the return value of Animation::update(float) to determine whether or
+     * not to call the desired callback externally.
+     * 
      * Create an Animation object by supplying a function and interval at which the function should run. Run Animation::update(float)
      * regularly with an updated timestamp from Game::update(float), and the function will be launched automatically at the given
      * interval. If the interval is omitted, the function will run every time Animation::update(float) is run.
@@ -71,7 +76,17 @@ public:
     void unpause();
     void reset();
     bool playing(bool = true) const;
-    void update(float timestamp);
+
+    /*!
+     * Update the timer and check the function's return value to determine whether a new frame of the animation should be produced.
+     *
+     * This will run the callback automatically if it is stored in this object, but the ability to store the callback in this object is deprecated and
+     * will be removed soon.
+     *
+     * @param timestamp  Seconds since the program has started, which can be obtained from Game::update(float)
+     * @return           True if the next frame of animation should be triggered, false otherwise
+     */
+    bool update(float timestamp);
 
 };
 

src/Game.cpp

@@ -286,7 +286,7 @@ void Game::load_gl_context()
     {
         std::ostringstream message;
         message << "GLEW could not initialize " << glewGetErrorString(error);
-        sb::Log::log(message, sb::Log::ERROR);
+        sb::Log::log(message, sb::Log::ERR);
     }
 #endif
 
@@ -383,7 +383,7 @@ GLuint Game::load_shader(const fs::path& path, GLenum type) const
         error_info.resize(max_length, 0);
         glGetShaderInfoLog(shader, error_info.size(), nullptr, error_info.data());
         message << "failed to compile " << path << ": " << error_info;
-        sb::Log::log(message, sb::Log::Level::ERROR);
+        sb::Log::log(message, sb::Log::Level::ERR);
         return -1;
     }
 }
@@ -409,7 +409,7 @@ bool Game::link_shader(GLuint program) const
         error_info.resize(max_length, 0);
         glGetProgramInfoLog(program, error_info.size(), nullptr, error_info.data());
         message << "failed linking shader program " << program << ": " << error_info;
-        sb::Log::log(message, sb::Log::Level::ERROR);
+        sb::Log::log(message, sb::Log::Level::ERR);
         return false;
     }
 }
@@ -562,7 +562,7 @@ std::shared_ptr<TTF_Font> sb::Game::font(const fs::path& path, int size) const
     {
         std::ostringstream message;
         message << "Could not load " << path;
-        sb::Log::log(message, sb::Log::ERROR);
+        sb::Log::log(message, sb::Log::ERR);
         if (path != configuration()("display", "default font path").get<std::string>())
         {
             return this->font();

src/Log.hpp

@@ -47,7 +47,7 @@ namespace sb
             DEBUG,
             INFO,
             WARN,
-            ERROR,
+            ERR,
             CRITICAL,
         };
 
@@ -88,7 +88,7 @@ namespace sb
          * @param level     message priority level
          * @return          a string stream containing the full message
          */
-        static std::ostringstream sdl_error(const std::string& message = "", const Level level = ERROR);
+        static std::ostringstream sdl_error(const std::string& message = "", const Level level = ERR);
 
     };
 

src/Model.cpp

@@ -117,7 +117,7 @@ const sb::Texture& sb::Model::texture(int index) const
     }
     else
     {
-        return textures()[index];
+        return textures()[glm::mod(index, static_cast<int>(textures().size()))];
     }
 }
 
@@ -129,7 +129,7 @@ sb::Texture& sb::Model::texture(int index)
     }
     else
     {
-        return textures()[index];
+        return textures()[glm::mod(index, static_cast<int>(textures().size()))];
     }
 }
 

src/Model.hpp

@@ -180,14 +180,17 @@ namespace sb
         std::vector<sb::Texture>& textures();
 
         /*!
-         * Get a constant reference to the texture at the given index. If there are no textures, an exception will be thrown.
+         * Get a constant reference to the texture at the given index. If there are no textures, an exception will be thrown. If the index is greater
+         * than the number of textures or is a negative number, modulus will be be used to wrap the value of the index to the size of the texture
+         * list.
          *
          * @param index   index of texture to get
          */
         const sb::Texture& texture(int index) const;
 
         /*!
-         * Get the texture at the given index. If there are no textures, an exception will be thrown.
+         * Get the texture at the given index. If there are no textures, an exception will be thrown. If the index is greater than the number of textures
+         * or is a negative number, modulus will be be used to wrap the value of the index to the size of the texture list.
          *
          * @param index   index of texture to get
          */

src/Pixels.cpp

@@ -79,7 +79,7 @@ Pixels::Pixels(SDL_Renderer* renderer, SDL_Texture* texture, const Box& box) :
     }
     else
     {
-        sb::Log::log("unknown texture format for loading pixels", sb::Log::Level::ERROR);
+        sb::Log::log("unknown texture format for loading pixels", sb::Log::Level::ERR);
     }
 }
 

src/Sprite.hpp

@@ -15,6 +15,7 @@
 #include "glm/glm.hpp"
 #include "filesystem.hpp"
 #include "Model.hpp"
+#include "Animation.hpp"
 
 namespace sb
 {
@@ -41,8 +42,18 @@ namespace sb
         /* A sprite by definition has only one texture per draw, so keep an index to the currently active texture. */
         int _texture_index = 0;
 
+        void frame_by_frame()
+        {
+            if (static_cast<std::size_t>(++_texture_index) >= plane.textures().size())
+            {
+                _texture_index = 0;
+            }
+        }
+
     public:
 
+        sb::Animation frames;
+
         /*!
          * Construct an instance of Sprite using an existing plane object. The plane will be copied into the Sprite, so further edits must
          * be made using the Sprite class.
@@ -295,6 +306,15 @@ namespace sb
             plane.transform(_translation * _scale * _rotation * transformation);
         }
 
+        void update(const sb::Timer& timer)
+        {
+            /* Update animation */
+            if (frames.update(timer.stamp()))
+            {
+                frame_by_frame();
+            }
+        }
+
         /*!
          * Get the sprite's transformation from Sprite::transform(glm::mat4), which combines the translation, scale, rotation, and an
          * optional arbitrary transformation, apply the given view and projection transformations, and pass the transformation to the

src/Texture.cpp

@@ -69,7 +69,7 @@ void Texture::load()
         {
             std::ostringstream message;
             message << "Error loading texture path: " << path;
-            sb::Log::log(message, sb::Log::ERROR);
+            sb::Log::log(message, sb::Log::ERR);
         }
 #endif
     }

src/extension.cpp

@@ -384,7 +384,7 @@ SDL_Texture* sb::get_remapped_texture(
     SDL_Texture* remapped = get_remapped_texture(renderer, base, map);
     if (remapped == nullptr)
     {
-        sb::Log::log("could not remap texture", sb::Log::ERROR);
+        sb::Log::log("could not remap texture", sb::Log::ERR);
         return nullptr;
     }
     SDL_DestroyTexture(base);