Session2 30/9/22
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@ -1,4 +1,5 @@
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from math import floor
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from math import floor, sqrt
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def transform_mp_to_abc(m, p):
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def transform_mp_to_abc(m, p):
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"""transforme une équation de la forme y = mx + p to ax + by = c
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"""transforme une équation de la forme y = mx + p to ax + by = c
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@ -8,6 +9,7 @@ def transform_mp_to_abc(m, p):
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"""
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"""
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return -m, 1, p
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return -m, 1, p
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def transform_abc_to_mp(a, b, c):
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def transform_abc_to_mp(a, b, c):
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"""transforme une équation de la forme to ax + by = c to y = mx + p
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"""transforme une équation de la forme to ax + by = c to y = mx + p
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@ -16,7 +18,8 @@ def transform_abc_to_mp(a, b, c):
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"""
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"""
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return -a/b, c
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return -a/b, c
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def droite(p1: tuple,p2: tuple) -> tuple:
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def droite(p1: tuple, p2: tuple) -> tuple:
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"""retourne un 3-uple d'une droite selon ax+by=c
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"""retourne un 3-uple d'une droite selon ax+by=c
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:p1: tuple du point 1
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:p1: tuple du point 1
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@ -96,8 +99,6 @@ def droite_normale(d, p):
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return transform_mp_to_abc(-1/m, y-(-1/m)*x)
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return transform_mp_to_abc(-1/m, y-(-1/m)*x)
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def symetrie_orthogonale(d, p):
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def symetrie_orthogonale(d, p):
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""" retourne la symétrie orthogonale par le point p de la droite d
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""" retourne la symétrie orthogonale par le point p de la droite d
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:returns: symétrie orthogonale
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:returns: symétrie orthogonale
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@ -105,14 +106,19 @@ def symetrie_orthogonale(d, p):
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"""
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"""
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a, b, c = d
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a, b, c = d
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x, y = p
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x, y = p
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ap, bp, cp = droite_normale(d,p) # perpendiculaire passant par le point
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ap, bp, cp = droite_normale(d, p) # perpendiculaire passant par le point
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xi, yi = intersection((a,b,c), (ap, bp, cp))
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xi, yi = intersection((a, b, c), (ap, bp, cp))
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return round((2*xi - x)*10)/10, round((2*yi - y)*10)/10
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return round((2*xi - x)*10)/10, round((2*yi - y)*10)/10
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def distance_droite_point(d, p):
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def distance_droite_point(d, p):
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"""TODO: Docstring for distance_droite_point.
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"""TODO: Docstring for distance_droite_point.
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:returns: TODO
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:returns: TODO
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"""
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"""
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pass
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a, b, c = d
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x, y = p
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ap, bp, cp = droite_normale(d,p) # perpendiculaire passant par le point
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xi, yi = intersection((a,b,c), (ap, bp, cp))
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return sqrt((xi-x)**2 + (yi-y)**2)
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@ -29,6 +29,7 @@ def tests():
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test(symetrie_orthogonale, (-0.5, 1, 1.0), (-2, 0), (-2.0, 0.0))
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test(symetrie_orthogonale, (-0.5, 1, 1.0), (-2, 0), (-2.0, 0.0))
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test(symetrie_orthogonale, (-0.5, 1, 1.0), (3, 4), (4.2, 1.6))
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test(symetrie_orthogonale, (-0.5, 1, 1.0), (3, 4), (4.2, 1.6))
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test(distance_droite_point, (-0.5, 1, 1.0), (-2, 0), 1.3416407864998741)
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test(distance_droite_point, (-0.5, 1, 1.0), (-2, 0), 0.0)
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test(distance_droite_point, (-0.5, 1, 1.0), (-2, 0), 0.0)
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