← All topics

python

4 captures, most recent first.

Saved image — no attribution recorded

— saved image

1. Walls are visible (fix #2).
2. Controls bar renders (fix #3).
3. The player, corridor, room structure look right.

Game runs and captures again. Visually inspecting the frame:

$ cd /Users/[redacted]/projects/specular && SDF_SEED=7310810 SDF_SCRIPTED_SCENARIO=smoke SDF_SCREENSHOT=/tmp/t124.bmp SDF_SCREENSHOT_TICK=124 ./target/debug/sdf-roguelite > /tmp/t124.log 2>&1; echo "t124 exit=$?"; file /tmp/t124.bmp | head -1
--- Output ---
t124 exit=0
/tmp/t124.bmp: PC bitmap, Windows 3.x format, 1920 x 1080 x 24, image size 6220800, cbSize 6220854, bits offset 54
<Wall: 2.42s | Timeout: 300s>

$ cd /Users/[redacted]/projects/specular && cat > /tmp/inspect_hud.py <<'EOF'
# Convert a 24-bit BMP region to an ASCII preview for quick text verification.
import struct, sys
path = sys.argv[1]
x0, y0, w, h = 0, 1040, 1920, 40  # controls bar strip
with open(path, 'rb') as f:
    data = f.read()
off = struct.unpack('<I', data[10:14])[0]
wpx = struct.unpack('<i', data[18:22])[0]
hpx = abs(struct.unpack('<i', data[22:26])[0])
row = ((wpx*3 + 3)//4)*4
# Find bright text pixels in the strip
bright = []
for yy in range(y0, min(y0+h, hpx)):
    for xx in range(x0, min(x0+w, wpx)):
        i = off + yy*row + xx*3
        b, g, r = data[i], data[i+1], data[i+2]
        if r > 150 and g > 150 and b > 150:
            bright.append((xx, yy))
if not bright:
    print("NO BRIGHT TEXT PIXELS in strip")
else:
    xs = [p[0] for p in bright]; ys = [p[1] for p in bright]
    print(f"bright pixels: {len(bright)}, x range {min(xs)}..{max(xs)}, y range {min(ys)}..{max(ys)}")
EOF
python3 /tmp/inspect_hud.py /tmp/t30.bmp
--- Output ---
bright pixels: 23320, x range 280..1916, y range 1040..1079
<Wall: 0.19s | Timeout: 300s>
Note from Claude Sonnet 5

Terminal/coding-assistant transcript screenshot showing debugging of a roguelite game called 'specular' / 'sdf-roguelite' — running a scripted smoke-test scenario, capturing a screenshot BMP, and writing a Python script to inspect pixel brightness in the HUD controls bar to verify text rendering.

codinggame devdebuggingterminalpython

Saved image — no attribution recorded

— saved image

907
908
909  def permute_matrix(W, rng=None):
910      """permute a matrix in a reversible way"""
911
912      num_params = np.prod(W.shape)
913      vec = W.reshape(num_params)
914      if rng is None:
915          p_ids = np.random.permutation(np.arange(num_params))
916      else:
917          p_ids = rng.permutation(np.arange(num_params))
918      p_vec = vec[p_ids]
919      p_W = p_vec.reshape(W.shape)
920
921      return p_W, p_ids
922
923
924  def unpermute_matrix(W, p_ids):
925      """unpermute a matrix, using the original ids to permute it"""
926
927      num_params = np.prod(W.shape)
928      vec = W.reshape(num_params)
929      unp_ids = np.argsort(p_ids)
930      unp_vec = vec[unp_ids]
931      unp_W = unp_vec.reshape(W.shape)
932
933      return unp_W
934
Note from Claude Sonnet 5

Screenshot of a Python code editor (line numbers 907-934) showing two functions, permute_matrix and unpermute_matrix, which reversibly shuffle the elements of a weight matrix using numpy.

pythoncodenumpymachine learning

Simone Conradi @S_Conradi

reposted by Ben Golub

↻ Ben Golub reposted Simone Conradi @S_Conradi · 16h Take two large random matrices and linearly interpolate between them at several hundred steps. Compute the eigenvalues for each interpolated matrix, then plot them in the complex plane. The result is shown here. Made with #python #numpy #matplotlib [Image: dense golden/orange fractal-like starburst pattern of scattered points on black background, resembling a spiky spherical cluster with long filamentary "hairs" radiating outward, forming a roughly circular eigenvalue distribution in the complex plane. Caption: "Simone Conradi, 2025"]
Note from Claude Sonnet 5

A generative-art / random-matrix-theory visualization showing eigenvalue trajectories of matrices interpolated between two random matrices, plotted in the complex plane, producing an intricate fractal starburst pattern. Mathematical/aesthetic content with no direct AI safety relevance; likely saved for visual interest or general math-art appreciation.

twittermathematicsrandom matrix theorydata visualizationgenerative artpython

thread — Raymond Hettinger @raymondh

Raymond Hettinger @raymondh "#Python tip: The any() and all() builtins have short-circuiting behavior, but that is lost if you use a list comprehension: all(interface.active for interface in interfaces) # Good all([interface.active for interface in interfaces]) # Not so good" 12:48 PM · 06 May 19 · Twitter Web Client 129 Retweets 530 Likes Raymond Hettinger @raymondh · 18h (reply): "The first form is a 'generator expression' that feeds one value at a time. The all() builtin stops requesting more values after in..." [cut off]
Note from Claude Sonnet 5

A Python programming tip from Raymond Hettinger (former Python core developer) about using generator expressions instead of list comprehensions with any()/all() to preserve short-circuit evaluation — technical reading material relevant to Nathan's software engineering work.

twitterpythonprogrammingraymond-hettingersoftware-engineering