随机化两个光栅的位置

我正在尝试创建两个同时显示的圆形光栅（一个水平的，一个垂直的）。在每次试验中，两个光栅的位置应该随机改变。

这是我到目前为止的代码，但我不知道如何添加“随机化”。

import psychopy.visual
import psychopy.event

win = psychopy.visual.Window(
    size=[1200, 600],
    units="pix",
    fullscr=False
)

grating = psychopy.visual.GratingStim(
    win=win,
    units="pix",
    size=[400,400]
)

grating.sf = 5.0 / 150.0

grating.mask = "circle"

orientations = [0.0, 90.0]
grating_hpos = [-300, 300]

for i_grating in range(2):
    grating.ori = orientations[i_grating]
    grating.pos = [grating_hpos[i_grating], 0]
    grating.draw()

win.flip()

psychopy.event.waitKeys()

win.close()

import psychopy.visual
import psychopy.event
import random

win = psychopy.visual.Window(
    size=[1200, 600],
    units="pix",
    fullscr=False
)

grating = psychopy.visual.GratingStim(
    win=win,
    units="pix",
    size=[400,400]
)

grating.sf = 5.0 / 150.0
grating.mask = "circle"

orientations = [0.0, 90.0]

# Define the range within which you want the gratings to appear
# For example, if you want them within the central 800 pixels:
x_range = [-400, 400]
y_range = [-300, 300]

for _ in range(10):  # This will show the gratings 10 times

    # Randomize the position of each grating
    grating_hpos = [random.uniform(*x_range), random.uniform(*y_range)]
    grating_vpos = [random.uniform(*x_range), random.uniform(*y_range)]

    for i_grating in range(2):
        if i_grating == 0:
            grating.ori = orientations[i_grating]
            grating.pos = grating_hpos
        else:
            grating.ori = orientations[i_grating]
            grating.pos = grating_vpos
        grating.draw()

    win.flip()

    psychopy.event.waitKeys()

win.close()

This code does the following:

1. Imports random : This module is needed for generating random numbers.
2. Defines x_range and y_range : These variables control the area where the gratings can appear. Adjust the values to change the area.
3. Loop for multiple trials: The code now includes a loop that runs for 10 trials. In each trial:
4. Randomizes grating_hpos and grating_vpos : For each grating (horizontal and vertical), it generates random x and y coordinates within the specified ranges using random.uniform() .
5. Draws the gratings: It sets the orientation and position of each grating based on the randomized values and draws them.
6. Waits for a key press: After each presentation, it waits for the user to press a key before proceeding to the next trial.

Now, each time you run the code, the two gratings will appear at different, random positions within the defined area.