Camera未定义报错排查：已定义仍提示myCamera未定义等问题

Let's break down your issues one by one—there are a few straightforward mistakes in your code that are causing these errors:

1. Circular Header Inclusion in level.h #

In your level.h file, you've included the file itself with #include "level.h". This creates a circular inclusion loop that confuses the compiler and prevents it from properly parsing your class definitions. Delete this line immediately.

2. Mismatched Constructor Name vs. Class Name #

Your class is named Scene, but you declared its constructor as level(Input *in);—this is a critical mismatch! The .cpp file's level::level definition can't find a corresponding class, which is why the compiler doesn't recognize myCamera (it doesn't know which class that member belongs to).

• Fix the constructor declaration in level.h to match the class name:

  Scene(Input *in);
  

• Update the constructor definition in level.cpp to match:

  Scene::Scene(Input *in) {
      // Your existing code here
  }
  

3. Case Sensitivity Issue with the Camera Class #

The error "Camera是未知覆盖说明符" (Camera is an unknown override specifier) almost certainly comes from a case mismatch between your class declaration and usage:

• If your camera.h defines a class named Camera (uppercase C), you need to declare your member variable as Camera myCamera; (not lowercase camera myCamera;) in the Scene class.
• Double-check camera.h to confirm the exact class name spelling and case—C++ is case-sensitive, so Camera and camera are treated as completely different types.

4. Incorrect Access to the Camera Instance #

In your .cpp constructor, you wrote camera.position.x = 0;—this tries to access a static member of the camera class, but position is a member of your myCamera instance. Fix this to:

myCamera.position.x = 0;

5. Uninitialized width/height Variables #

You're using width and height in gluPerspective before initializing them. This will cause invalid perspective matrix calculations. Add initial values in the constructor, e.g.:

width = 800; // Or pass these values in via the constructor
height = 600;

After fixing all these issues, clean your build directory and recompile—both of your errors should be resolved.

内容的提问来源于stack exchange，提问作者memelord420360