data_gen.py

import matplotlib.pyplot as plt
import matplotlib.patches as patches
import numpy as np

def data_generation(rounding_size=0.00, gray_value=0.5, rotation_angle=0, shape_size=0.2):
    """
    Draws two symmetric upright squares on a square canvas, positioned symmetrically and rotated around center.

    Parameters:
    - rounding_size: float (0 to ~0.5), roundness of the soft-corner square
    - gray_value: float (0 to 1), grayscale color of the squares (1=white, 0=black)
    - rotation_angle: float, rotation angle in degrees (affects position only, not shape orientation)
    - shape_size: float, size of the squares (0 to 1)
    """
    fig, ax = plt.subplots(figsize=(6, 6))

    # Colors
    # color_sharp = (0.5, 0.5, 0.5)
    color_sharp = (0.75, 0.75, 0.75)
    color_rounded = (gray_value, gray_value, gray_value)

    # Center point
    cx, cy = 0.5, 0.5
    # offset = 0.3
    offset = 0.25

    # Rotation matrix
    theta = np.radians(rotation_angle)
    cos_t, sin_t = np.cos(theta), np.sin(theta)

    def rotate_point(x, y, cx, cy):
        """Rotate a point (x, y) around center (cx, cy) by theta radians."""
        x_shifted = x - cx
        y_shifted = y - cy
        x_new = cos_t * x_shifted - sin_t * y_shifted + cx
        y_new = sin_t * x_shifted + cos_t * y_shifted + cy
        return x_new, y_new

    # Left (sharp) square position
    shape_size_sharp = 0.2
    left_center = rotate_point(cx - offset, cy, cx, cy)
    square_sharp = patches.Rectangle(
        (left_center[0] - shape_size_sharp/2, left_center[1] - shape_size_sharp/2),
        shape_size_sharp, shape_size_sharp,
        linewidth=1, edgecolor=color_sharp, facecolor=color_sharp
    )
    ax.add_patch(square_sharp)

    # Right (rounded) square position
    right_center = rotate_point(cx + offset, cy, cx, cy)
    square_rounded = patches.FancyBboxPatch(
        (right_center[0] - shape_size/2, right_center[1] - shape_size/2),
        shape_size, shape_size,
        boxstyle=f"round,pad=0.00, rounding_size={rounding_size}",
        linewidth=1, edgecolor=color_rounded, facecolor=color_rounded
    )
    ax.add_patch(square_rounded)

    # Set limits and aspect
    ax.set_xlim(0, 1)
    ax.set_ylim(0, 1)
    ax.set_aspect('equal')
    ax.axis('off')

    # Save and show
    plt.savefig(
        f"test_{rounding_size:.3f}_{gray_value:.2f}_{rotation_angle:.1f}_{shape_size:.2f}.png",
        dpi=300, bbox_inches='tight'
    )
    plt.show()


for r in [0.00, 0.03, 0.06, 0.09, 0.12]:
  for g in [0.75, 0.65, 0.55, 0.45, 0.35]:
    for a in [-45, -22.5, 0, 22.5, 45]:
      for s in [0.2, 0.25, 0.30, 0.35, 0.40]:
        data_generation(
            rounding_size=r,
            gray_value=g,
            rotation_angle=a,
            shape_size=s
        )