Got it, let's solve this sequence-based texture switching problem! The issue with random.choose is that it picks textures randomly, which doesn't fit your need for a fixed repeating cycle (texture1 → texture2 → texture1 → ...). Instead, we need to track the current state of our texture selection to know which one to load next.

Here are two clean, maintainable approaches tailored to your use case:

Approach 1: Sequence List with Index Tracking (Flexible for Future Expansion) #

This method uses a list to define your texture sequence and an index variable to track where you are in the cycle. It's great if you might add more textures later (e.g., texture3 down the line).

Step-by-Step Implementation: #

1. Initialize state variables in your class's __init__ method:
   • Define your fixed texture sequence
   • Set an initial index to start with texture1
2. Load texture based on current index
3. Update the index to wrap around the sequence (using modulo arithmetic)

class PowerUp:
    def __init__(self):
        # Define your repeating texture sequence
        self.texture_sequence = ["texture1", "texture2"]
        # Start at index 0 to load texture1 first
        self.current_texture_idx = 0
        # Load the initial texture
        self.update_texture()

    def update_texture(self):
        # Load the texture at the current index
        self.texture = bs.getTexture(self.texture_sequence[self.current_texture_idx])
        # Update index to cycle through the sequence (wraps back to 0 after last item)
        self.current_texture_idx = (self.current_texture_idx + 1) % len(self.texture_sequence)

How to Use: #

Call self.update_texture() every time you need to switch the texture (e.g., when the powerup is picked up, respawned, or triggered).

Approach 2: Boolean Flag (Simple for 2-Texture Cycle) #

If you only ever need to toggle between two textures, a boolean flag is a lightweight, straightforward option.

Step-by-Step Implementation: #

1. Initialize a boolean flag in __init__ to track which texture to load next
2. Toggle the flag each time you load a texture to switch between the two options

class PowerUp:
    def __init__(self):
        # Flag: True means next texture is texture2; False means next is texture1
        # Start with False so we load texture1 first
        self._next_texture_is_texture2 = False
        self.update_texture()

    def update_texture(self):
        if not self._next_texture_is_texture2:
            # Load texture1 first
            self.texture = bs.getTexture("texture1")
            # Next time we'll load texture2
            self._next_texture_is_texture2 = True
        else:
            # Load texture2
            self.texture = bs.getTexture("texture2")
            # Next time we'll load texture1
            self._next_texture_is_texture2 = False

How to Use: #

Same as above—call self.update_texture() whenever you need to switch the texture.

Why This Works: #

Unlike random.choose, both approaches keep track of the last texture loaded, ensuring you follow the exact repeating sequence you want. The first method is scalable for longer sequences, while the second is perfect for a simple two-texture toggle.

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