Exported constants to their own file

src/consts.h

@@ -0,0 +1,14 @@
+#ifndef CONSTS_H
+#define CONSTS_H
+
+// TODO: Eventually, export this into a better place (i.e., such that we do not have to recompile every time we change a parameter)
+const int VOLUME_WIDTH  = 49;
+const int VOLUME_HEIGHT = 51;
+const int VOLUME_DEPTH  = 42;
+
+const int IMAGE_WIDTH   = 2560;
+const int IMAGE_HEIGHT  = 1440;
+
+const int SAMPLES_PER_PIXEL = 8;  // TODO: Right now uses simple variance, consider using something more advanced (e.g., some commonly-used noise map)
+
+#endif // CONSTS_H