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0e14cec037
The hash_art() function was hardcoding pad based on 80 columns. Now accepts term_width parameter and the renderer passes the real terminal width for proper centering. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
51 lines
1.5 KiB
Python
51 lines
1.5 KiB
Python
"""Block hash generative ASCII art.
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Uses hash bytes as seeds to create a unique visual pattern per block.
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"""
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# Characters ordered by visual density
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GLYPHS = " \u2591\u2592\u2593\u2588\u2580\u2584\u258c\u2590\u256c\u2550\u2551"
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# 256-color ANSI foreground
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def _color256(n):
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return f"\033[38;5;{n}m"
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RESET = "\033[0m"
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def hash_art(block_hash, width=40, height=6, term_width=80):
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"""Generate deterministic ASCII art from a block hash string.
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Each pair of hex digits maps to a glyph and color.
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The pattern is mirrored horizontally for symmetry.
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"""
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# Convert hex hash to bytes
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raw = block_hash.strip()
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hex_pairs = [raw[i:i+2] for i in range(0, len(raw), 2)]
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values = [int(h, 16) for h in hex_pairs if len(h) == 2]
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if not values:
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return ""
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half_w = width // 2
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lines = []
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pad = max(0, (term_width - width) // 2)
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for row in range(height):
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left = []
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for col in range(half_w):
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idx = (row * half_w + col) % len(values)
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val = values[idx]
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# Glyph from lower nibble
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glyph = GLYPHS[val % len(GLYPHS)]
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# Color from upper nibble + row offset (for variety)
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color_idx = 16 + ((val + row * 7) % 216) # 216-color cube
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left.append(f"{_color256(color_idx)}{glyph}")
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# Mirror for symmetry
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right = list(reversed(left))
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line = ''.join(left) + ''.join(right) + RESET
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lines.append(' ' * pad + line)
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return '\n'.join(lines)
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