change camera defaults

src/main.cpp

@@ -93,7 +93,14 @@ struct PerFrame {
     Uint32 map_width;
 };
 
-PerFrame per_frame = { 1.0f, 45.0f, 0.0f, 0.0f, 10.0f, 45.0f };
+PerFrame per_frame = { 
+    .aspect_ratio    = 16.0f / 9.0f,
+    .fovy_degrees    = 31.0f,
+    .camera_x        = 0.0f,
+    .camera_y        = 0.0f,
+    .camera_distance = 13.5f,
+    .camera_tilt     = 25.5f,
+};
 
 typedef struct {
     Uint16      type;