User: code a simple python program to open a white window using glfw and moderngl. try to keep the code as simple as possible and then explain it to me.

Assistant: Certainly! To open a white window using GLFW and ModernGL in Python, you'll first need to ensure that you have the necessary libraries installed. You can install them via pip:

```bash
pip install glfw moderngl
```

Once you have these libraries installed, you can use the following code to create and display the window:

```python
import glfw
import moderngl
import numpy as np

# Initialize the library
if not glfw.init():
    raise Exception("GLFW can't be initialized")

# Create a windowed mode window and its OpenGL context
window = glfw.create_window(640, 480, "White Window", None, None)
if not window:
    glfw.terminate()
    raise Exception("GLFW window can't be created")

# Make the window's context current
glfw.make_context_current(window)

# ModernGL context creation
ctx = moderngl.create_context()

# Create a white framebuffer to render
fbo = ctx.framebuffer(color_attachments=ctx.texture((640, 480), 4))
fbo.use()

# Set the clear color to white
ctx.clear(1.0, 1.0, 1.0, 1.0)

# Main loop
while not glfw.window_should_close(window):
    # Poll for and process events
    glfw.poll_events()

    # Render the frame here
    ctx.clear(1.0, 1.0, 1.0, 1.0)

    # Swap front and back buffers
    glfw.swap_buffers(window)

# Terminate GLFW
glfw.terminate()
```

### Explanation:

1. **Library Initialization**:
   - First, we check if GLFW can be initialized with `glfw.init()`. If it fails, we raise an exception.

2. **Window Creation**:
   - A window is created using `glfw.create_window(width, height, title, monitor, share)`. We check if the window creation is successful; otherwise, we terminate GLFW and raise an exception.

3. **Make Context Current**:
   - `glfw.make_context_current(window)` makes the OpenGL context of the window current, so any commands we send affect this window.

4. **ModernGL Context**:
   - We create a ModernGL context (`ctx = moderngl.create_context()`) which will allow us to interface with OpenGL through ModernGL.

5. **Framebuffer Creation**:
   - A framebuffer object (FBO) is created, which holds the image that our OpenGL commands will render into. Here, we attach a texture (essentially an array of pixel data) as the color attachment.

6. **Set Clear Color**:
   - We set the clear color to white using `ctx.clear(1.0, 1.0, 1.0, 1.0)`, where the parameters represent the RGBA values (all set to 1.0 for white).

7. **Main Loop**:
   - We have a loop that continues until the window should close (checked via `glfw.window_should_close(window)`).
   - Within this loop, we poll for events using `glfw.poll_events()`, clear the context to white using `ctx.clear(1.0, 1.0, 1.0, 1.0)`, and swap the front and back buffers using `glfw.swap_buffers(window)` to display the rendered image.

8. **Cleanup**:
   - After exiting the loop, we call `glfw.terminate()` to clean up and close the window.

This simple program will display a white window that remains open until you close it manually. It's a minimal example to demonstrate using GLFW and ModernGL together.
User: - what does making context current mean ?
- what is a moderngl context ?
- what is a framebuffer object ?
- what does clear mean in clear color ? does it mean removing everything from the screen and coloring it by a color ?
- what does front / back buffer mean ? is the back buffer the frame ready to be rendered but not displayed and the front buffer is whats currently displayed ?
Assistant: