wuwiandClaude Fable 5
811fe3f91f
Sheets generated with the existing zombie sheet as the style anchor (edit mode); sliced to z_f1/2 (runner sprint), z_g1/2 (brute + net-post club), z_s1/2/3 (shield zombie, chair up / chair dropped stagger), x_tin (black new-balls tin). assets/_slice.py is now committed (chroma-key + de-fringe + segmentation) so the pipeline survives scratchpad wipes; HANDOFF updated. Sprites are NOT wired into render.js yet — Phase 11 does that after Oliver approves the sheets (plan's design checkpoint). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
72 lines
3.3 KiB
Python
72 lines
3.3 KiB
Python
# slice.py — chroma-key a generated sprite sheet on its corner color, split into
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# frames on column gaps, common-scale the sheet so the tallest frame = IDLE_TARGET_H,
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# save each frame to the given output paths. Usage: slice.py sheet.png out1.png out2.png ...
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import sys
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from PIL import Image
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IDLE_TARGET_H = 112
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KEY_D2 = 60 * 60 # squared RGB distance to the bg color that still counts as background
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MIN_GAP = 12 # empty columns that separate frames
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MIN_BLOB = 60 # despeckle: drop opaque islands smaller than this many pixels
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def main(sheet_path, out_paths, largest_only=False):
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im = Image.open(sheet_path).convert('RGBA')
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w, h = im.size
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px = im.load()
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# background = corner color (average the four corners that agree with the top-left)
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bg = px[0, 0][:3]
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for x in range(w):
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for y in range(h):
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r, g, b, a = px[x, y]
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if (r - bg[0]) ** 2 + (g - bg[1]) ** 2 + (b - bg[2]) ** 2 < KEY_D2 \
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or (min(r, b) > g + 40): # de-fringe: magenta-hued halo pixels (sprites have no magenta)
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px[x, y] = (0, 0, 0, 0)
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# despeckle: flood-fill opaque components; wipe tiny ones (halos, dust).
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# largest_only additionally wipes everything but the biggest blob (stray fragments
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# from splitting a sheet whose frames touch — e.g. the brute's dragged pole).
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seen = [[False] * h for _ in range(w)]
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blobs = []
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for x in range(w):
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for y in range(h):
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if seen[x][y] or px[x, y][3] == 0: continue
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stack, blob = [(x, y)], []
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seen[x][y] = True
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while stack:
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cx, cy = stack.pop()
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blob.append((cx, cy))
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for nx, ny in ((cx+1,cy),(cx-1,cy),(cx,cy+1),(cx,cy-1)):
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if 0 <= nx < w and 0 <= ny < h and not seen[nx][ny] and px[nx, ny][3] > 0:
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seen[nx][ny] = True; stack.append((nx, ny))
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blobs.append(blob)
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keep = max(blobs, key=len) if (largest_only and blobs) else None
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for blob in blobs:
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if blob is keep: continue
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if largest_only or len(blob) < MIN_BLOB:
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for cx, cy in blob: px[cx, cy] = (0, 0, 0, 0)
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# segment on empty column runs
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cols = [any(px[x, y][3] for y in range(h)) for x in range(w)]
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frames, start, gap = [], None, 0
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for x in range(w):
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if cols[x]:
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if start is None: start = x
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gap = 0
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elif start is not None:
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gap += 1
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if gap >= MIN_GAP:
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frames.append((start, x - gap + 1)); start = None
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if start is not None: frames.append((start, w))
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crops = []
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for x0, x1 in frames:
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c = im.crop((x0, 0, x1, h))
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crops.append(c.crop(c.getbbox()))
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if len(crops) != len(out_paths):
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sys.exit(f'ERROR: found {len(crops)} frames, expected {len(out_paths)} ({sheet_path})')
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k = IDLE_TARGET_H / max(c.height for c in crops) # one scale per sheet keeps relative frame sizes
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for c, out in zip(crops, out_paths):
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c.resize((max(1, round(c.width * k)), max(1, round(c.height * k))), Image.NEAREST).save(out)
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print(f'{out}: {round(c.width * k)}x{round(c.height * k)}')
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if __name__ == '__main__':
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args = [a for a in sys.argv[1:] if a != '--largest']
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main(args[0], args[1:], largest_only='--largest' in sys.argv)
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