Work in progress: move renderer state to actual class.

src/fmri/RenderingState.hpp

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <string>
+
+namespace fmri
+{
+    /**
+     * Singleton class defining the state of the current rendering.
+     *
+     * This class manages the currently loaded data and any related visualisations.
+     */
+    class RenderingState {
+    public:
+        /**
+         * Reset the rendering state
+         */
+        void reset();
+        void configureRenderingContext();
+        void registerControls();
+        /**
+         * GLUT mouse handler function
+         * @param x coordinate
+         * @param y coordinate
+         */
+        void handleMouseAt(int x, int y);
+        /**
+         * GLUT keyboard handler function
+         * @param x
+         */
+        void handleKey(unsigned char x);
+        std::string infoLine();
+
+        static RenderingState& instance();
+
+    private:
+        float pos[3];
+        float angle[2];
+
+        RenderingState() noexcept = default;
+
+        void move(unsigned char key);
+    };
+}