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8 lines
186 B
Plaintext
8 lines
186 B
Plaintext
function point_rotate(px, py, ox, oy, a) {
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var cx = px - ox;
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var cy = py - oy;
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var d = -degtorad(a);
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return [ox + cx * cos(d) - cy * sin(d),
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oy + cx * sin(d) + cy * cos(d)];
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} |