ckochandClaude Opus 5.5
95ad4d25de
- python3 -m sandtable web: local web page to play designs from a library of 27 built-in patterns, upload .thr or .svg, pause/skip/stop, jog and calibrate. Reconnects by itself when the USB cable comes back. - Plays .thr files and built-in generators with an erase spiral between them, constant ball speed, host-side homing on stock GRBL 1.1 (Uno + CNC shield), FluidNC for the ESP32 board. - Home switch guard: patterns never press the switch, so a press means lost steps and stops the machine at once with an alert. - lineart.py turns SVG line drawings into one continuous path. - Tests against a GRBL simulator. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
"""Read and write .thr (theta-rho) pattern files.
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Each line holds "<theta> <rho>":
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theta: angle in radians, continuous (it keeps counting past 2*pi; it is not wrapped)
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rho: distance from the centre, 0 (centre) to 1 (edge)
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Lines starting with '#' or '//' are comments. This is the format used by Sandify,
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Sisyphus and Dune Weaver.
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"""
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import math
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Pattern = list # list of (theta_rad, rho) tuples
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def loads(text):
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pts = []
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for raw in text.splitlines():
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line = raw.strip()
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if not line or line.startswith('#') or line.startswith('//'):
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continue
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parts = line.replace(',', ' ').split()
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if len(parts) < 2:
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continue
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try:
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th, rho = float(parts[0]), float(parts[1])
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except ValueError:
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continue
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if math.isfinite(th) and math.isfinite(rho):
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pts.append((th, min(1.0, max(0.0, rho))))
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return pts
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def load(path):
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with open(path, encoding='utf-8', errors='replace') as f:
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pts = loads(f.read())
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if len(pts) < 2:
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raise ValueError(f'{path}: no theta-rho points found')
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return pts
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def dumps(pts, header=None):
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out = []
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if header:
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out += [f'# {h}' for h in header.splitlines()]
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out += [f'{th:.5f} {rho:.5f}' for th, rho in pts]
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return '\n'.join(out) + '\n'
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def save(path, pts, header=None):
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with open(path, 'w') as f:
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f.write(dumps(pts, header))
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