2298d36bed
- Create Economist SubmissionTracking package correctly: * mainArticle = full blog post content * coverLetter = 216-word SIR— letter * Links to blog post via blogPostId - Archive 'Letter to The Economist' from blog posts (it's the cover letter) - Fix date display on article cards (use published_at) - Target publication already displaying via blue badge Database changes: - Make blogPostId optional in SubmissionTracking model - Economist package ID: 68fa85ae49d4900e7f2ecd83 - Le Monde package ID: 68fa2abd2e6acd5691932150 Next: Enhanced modal with tabs, validation, export 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
51 lines
1.9 KiB
Python
51 lines
1.9 KiB
Python
"""Transformation matrix."""
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class Matrix(list):
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def __init__(self, a=1, b=0, c=0, d=1, e=0, f=0, matrix=None):
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if matrix is None:
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matrix = [[a, b, 0], [c, d, 0], [e, f, 1]]
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super().__init__(matrix)
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def __matmul__(self, other):
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assert len(self[0]) == len(other) == len(other[0]) == 3
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return Matrix(matrix=[
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[sum(self[i][k] * other[k][j] for k in range(3)) for j in range(3)]
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for i in range(len(self))])
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@property
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def invert(self):
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d = self.determinant
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return Matrix(matrix=[
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[
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(self[1][1] * self[2][2] - self[1][2] * self[2][1]) / d,
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(self[0][1] * self[2][2] - self[0][2] * self[2][1]) / -d,
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(self[0][1] * self[1][2] - self[0][2] * self[1][1]) / d,
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],
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[
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(self[1][0] * self[2][2] - self[1][2] * self[2][0]) / -d,
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(self[0][0] * self[2][2] - self[0][2] * self[2][0]) / d,
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(self[0][0] * self[1][2] - self[0][2] * self[1][0]) / -d,
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],
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[
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(self[1][0] * self[2][1] - self[1][1] * self[2][0]) / d,
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(self[0][0] * self[2][1] - self[0][1] * self[2][0]) / -d,
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(self[0][0] * self[1][1] - self[0][1] * self[1][0]) / d,
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],
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])
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@property
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def determinant(self):
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assert len(self) == len(self[0]) == 3
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return (
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self[0][0] * (self[1][1] * self[2][2] - self[1][2] * self[2][1]) -
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self[1][0] * (self[0][1] * self[2][2] - self[0][2] * self[2][1]) +
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self[2][0] * (self[0][1] * self[1][2] - self[0][2] * self[1][1]))
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def transform_point(self, x, y):
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return (Matrix(matrix=[[x, y, 1]]) @ self)[0][:2]
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@property
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def values(self):
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(a, b), (c, d), (e, f) = [column[:2] for column in self]
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return a, b, c, d, e, f
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