Python Line.is_parallel方法代码示例

# 需要导入模块: from sympy.geometry import Line [as 别名]
# 或者: from sympy.geometry.Line import is_parallel [as 别名]
def test_line():
    p1 = Point(0, 0)
    p2 = Point(1, 1)
    p3 = Point(x1, x1)
    p4 = Point(y1, y1)
    p5 = Point(x1, 1 + x1)
    p6 = Point(1, 0)
    p7 = Point(0, 1)
    p8 = Point(2, 0)
    p9 = Point(2, 1)

    l1 = Line(p1, p2)
    l2 = Line(p3, p4)
    l3 = Line(p3, p5)
    l4 = Line(p1, p6)
    l5 = Line(p1, p7)
    l6 = Line(p8, p9)
    l7 = Line(p2, p9)
    raises(ValueError, lambda: Line(Point(0, 0), Point(0, 0)))

    # Basic stuff
    assert Line((1, 1), slope=1) == Line((1, 1), (2, 2))
    assert Line((1, 1), slope=oo) == Line((1, 1), (1, 2))
    assert Line((1, 1), slope=-oo) == Line((1, 1), (1, 2))
    raises(ValueError, lambda: Line((1, 1), 1))
    assert Line(p1, p2) == Line(p2, p1)
    assert l1 == l2
    assert l1 != l3
    assert l1.slope == 1
    assert l1.length == oo
    assert l3.slope == oo
    assert l4.slope == 0
    assert l4.coefficients == (0, 1, 0)
    assert l4.equation(x=x, y=y) == y
    assert l5.slope == oo
    assert l5.coefficients == (1, 0, 0)
    assert l5.equation() == x
    assert l6.equation() == x - 2
    assert l7.equation() == y - 1
    assert p1 in l1  # is p1 on the line l1?
    assert p1 not in l3
    assert Line((-x, x), (-x + 1, x - 1)).coefficients == (1, 1, 0)

    assert simplify(l1.equation()) in (x - y, y - x)
    assert simplify(l3.equation()) in (x - x1, x1 - x)

    assert Line(p1, p2).scale(2, 1) == Line(p1, p9)

    assert l2.arbitrary_point() in l2
    for ind in xrange(0, 5):
        assert l3.random_point() in l3

    # Orthogonality
    p1_1 = Point(-x1, x1)
    l1_1 = Line(p1, p1_1)
    assert l1.perpendicular_line(p1) == l1_1
    assert Line.is_perpendicular(l1, l1_1)
    assert Line.is_perpendicular(l1, l2) == False
    p = l1.random_point()
    assert l1.perpendicular_segment(p) == p

    # Parallelity
    p2_1 = Point(-2 * x1, 0)
    l2_1 = Line(p3, p5)
    assert l2.parallel_line(p1_1) == Line(p2_1, p1_1)
    assert l2_1.parallel_line(p1) == Line(p1, Point(0, 2))
    assert Line.is_parallel(l1, l2)
    assert Line.is_parallel(l2, l3) == False
    assert Line.is_parallel(l2, l2.parallel_line(p1_1))
    assert Line.is_parallel(l2_1, l2_1.parallel_line(p1))

    # Intersection
    assert intersection(l1, p1) == [p1]
    assert intersection(l1, p5) == []
    assert intersection(l1, l2) in [[l1], [l2]]
    assert intersection(l1, l1.parallel_line(p5)) == []

    # Concurrency
    l3_1 = Line(Point(5, x1), Point(-Rational(3, 5), x1))
    assert Line.is_concurrent(l1) == False
    assert Line.is_concurrent(l1, l3)
    assert Line.is_concurrent(l1, l3, l3_1)
    assert Line.is_concurrent(l1, l1_1, l3) == False

    # Projection
    assert l2.projection(p4) == p4
    assert l1.projection(p1_1) == p1
    assert l3.projection(p2) == Point(x1, 1)
    raises(GeometryError, lambda: Line(Point(0, 0), Point(1, 0)).projection(Circle(Point(0, 0), 1)))

    # Finding angles
    l1_1 = Line(p1, Point(5, 0))
    assert feq(Line.angle_between(l1, l1_1).evalf(), pi.evalf() / 4)

    # Testing Rays and Segments (very similar to Lines)
    assert Ray((1, 1), angle=pi / 4) == Ray((1, 1), (2, 2))
    assert Ray((1, 1), angle=pi / 2) == Ray((1, 1), (1, 2))
    assert Ray((1, 1), angle=-pi / 2) == Ray((1, 1), (1, 0))
    assert Ray((1, 1), angle=-3 * pi / 2) == Ray((1, 1), (1, 2))
    assert Ray((1, 1), angle=5 * pi / 2) == Ray((1, 1), (1, 2))
#.........这里部分代码省略.........

# 需要导入模块: from sympy.geometry import Line [as 别名]
# 或者: from sympy.geometry.Line import is_parallel [as 别名]
def test_line():
    p1 = Point(0, 0)
    p2 = Point(1, 1)
    p3 = Point(x1, x1)
    p4 = Point(y1, y1)
    p5 = Point(x1, 1 + x1)

    l1 = Line(p1, p2)
    l2 = Line(p3, p4)
    l3 = Line(p3, p5)

    # Basic stuff
    assert Line(p1, p2) == Line(p2, p1)
    assert l1 == l2
    assert l1 != l3
    assert l1.slope == 1
    assert l3.slope == oo
    assert p1 in l1 # is p1 on the line l1?
    assert p1 not in l3

    assert simplify(l1.equation()) in (x-y, y-x)
    assert simplify(l3.equation()) in (x-x1, x1-x)

    assert l2.arbitrary_point() in l2
    for ind in xrange(0, 5):
        assert l3.random_point() in l3

    # Orthogonality
    p1_1 = Point(-x1, x1)
    l1_1 = Line(p1, p1_1)
    assert l1.perpendicular_line(p1) == l1_1
    assert Line.is_perpendicular(l1, l1_1)
    assert Line.is_perpendicular(l1 , l2) == False

    # Parallelity
    p2_1 = Point(-2*x1, 0)
    l2_1 = Line(p3, p5)
    assert l2.parallel_line(p1_1) == Line(p2_1, p1_1)
    assert l2_1.parallel_line(p1) == Line(p1, Point(0, 2))
    assert Line.is_parallel(l1, l2)
    assert Line.is_parallel(l2, l3) == False
    assert Line.is_parallel(l2, l2.parallel_line(p1_1))
    assert Line.is_parallel(l2_1, l2_1.parallel_line(p1))

    # Intersection
    assert intersection(l1, p1) == [p1]
    assert intersection(l1, p5) == []
    assert intersection(l1, l2) in [[l1], [l2]]
    assert intersection(l1, l1.parallel_line(p5)) == []

    # Concurrency
    l3_1 = Line(Point(5, x1), Point(-Rational(3,5), x1))
    assert Line.is_concurrent(l1, l3)
    assert Line.is_concurrent(l1, l3, l3_1)
    assert Line.is_concurrent(l1, l1_1, l3) == False

    # Projection
    assert l2.projection(p4) == p4
    assert l1.projection(p1_1) == p1
    assert l3.projection(p2) == Point(x1, 1)

    # Finding angles
    l1_1 = Line(p1, Point(5, 0))
    assert feq(Line.angle_between(l1, l1_1).evalf(), pi.evalf()/4)

    # Testing Rays and Segments (very similar to Lines)
    r1 = Ray(p1, Point(-1, 5))
    r2 = Ray(p1, Point(-1, 1))
    r3 = Ray(p3, p5)
    assert l1.projection(r1) == Ray(p1, p2)
    assert l1.projection(r2) == p1
    assert r3 != r1

    s1 = Segment(p1, p2)
    s2 = Segment(p1, p1_1)
    assert s1.midpoint == Point(Rational(1,2), Rational(1,2))
    assert s2.length == sqrt( 2*(x1**2) )
    assert s1.perpendicular_bisector() == Line(Point(0, 1), Point(1, 0))

    # Testing distance from a Segment to an object
    s1 = Segment(Point(0, 0), Point(1, 1))
    s2 = Segment(Point(half, half), Point(1, 0))
    pt1 = Point(0, 0)
    pt2 = Point(Rational(3)/2, Rational(3)/2)
    assert s1.distance(pt1) == 0
    assert s2.distance(pt1) == 2**(half)/2
    assert s2.distance(pt2) == 2**(half)

    # Special cases of projection and intersection
    r1 = Ray(Point(1, 1), Point(2, 2))
    r2 = Ray(Point(2, 2), Point(0, 0))
    r3 = Ray(Point(1, 1), Point(-1, -1))
    r4 = Ray(Point(0, 4), Point(-1, -5))
    assert intersection(r1, r2) == [Segment(Point(1, 1), Point(2, 2))]
    assert intersection(r1, r3) == [Point(1, 1)]
    assert r1.projection(r3) == Point(1, 1)
    assert r1.projection(r4) == Segment(Point(1, 1), Point(2, 2))

    r5 = Ray(Point(0, 0), Point(0, 1))
    r6 = Ray(Point(0, 0), Point(0, 2))
#.........这里部分代码省略.........

# 需要导入模块: from sympy.geometry import Line [as 别名]
# 或者: from sympy.geometry.Line import is_parallel [as 别名]
def test_line():
    p1 = Point(0, 0)
    p2 = Point(1, 1)
    p3 = Point(x1, x1)
    p4 = Point(y1, y1)
    p5 = Point(x1, 1 + x1)
    p6 = Point(1, 0)
    p7 = Point(0, 1)
    p8 = Point(2, 0)
    p9 = Point(2, 1)

    l1 = Line(p1, p2)
    l2 = Line(p3, p4)
    l3 = Line(p3, p5)
    l4 = Line(p1, p6)
    l5 = Line(p1, p7)
    l6 = Line(p8, p9)
    l7 = Line(p2, p9)

    # Basic stuff
    assert Line((1, 1), slope=1) == Line((1, 1), (2, 2))
    assert Line((1, 1), slope=oo) == Line((1, 1), (1, 2))
    assert Line((1, 1), slope=-oo) == Line((1, 1), (1, 2))
    raises(ValueError, "Line((1, 1), 1)")
    assert Line(p1, p2) == Line(p2, p1)
    assert l1 == l2
    assert l1 != l3
    assert l1.slope == 1
    assert l3.slope == oo
    assert l4.slope == 0
    assert l4.coefficients == (0, 1, 0)
    assert l4.equation(x=x, y=y) == y
    assert l5.slope == oo
    assert l5.coefficients == (1, 0, 0)
    assert l5.equation() == x
    assert l6.equation() == x - 2
    assert l7.equation() == y - 1
    assert p1 in l1  # is p1 on the line l1?
    assert p1 not in l3

    assert simplify(l1.equation()) in (x - y, y - x)
    assert simplify(l3.equation()) in (x - x1, x1 - x)

    assert l2.arbitrary_point() in l2
    for ind in xrange(0, 5):
        assert l3.random_point() in l3

    # Orthogonality
    p1_1 = Point(-x1, x1)
    l1_1 = Line(p1, p1_1)
    assert l1.perpendicular_line(p1) == l1_1
    assert Line.is_perpendicular(l1, l1_1)
    assert Line.is_perpendicular(l1, l2) == False

    # Parallelity
    p2_1 = Point(-2 * x1, 0)
    l2_1 = Line(p3, p5)
    assert l2.parallel_line(p1_1) == Line(p2_1, p1_1)
    assert l2_1.parallel_line(p1) == Line(p1, Point(0, 2))
    assert Line.is_parallel(l1, l2)
    assert Line.is_parallel(l2, l3) == False
    assert Line.is_parallel(l2, l2.parallel_line(p1_1))
    assert Line.is_parallel(l2_1, l2_1.parallel_line(p1))

    # Intersection
    assert intersection(l1, p1) == [p1]
    assert intersection(l1, p5) == []
    assert intersection(l1, l2) in [[l1], [l2]]
    assert intersection(l1, l1.parallel_line(p5)) == []

    # Concurrency
    l3_1 = Line(Point(5, x1), Point(-Rational(3, 5), x1))
    assert Line.is_concurrent(l1, l3)
    assert Line.is_concurrent(l1, l3, l3_1)
    assert Line.is_concurrent(l1, l1_1, l3) == False

    # Projection
    assert l2.projection(p4) == p4
    assert l1.projection(p1_1) == p1
    assert l3.projection(p2) == Point(x1, 1)

    # Finding angles
    l1_1 = Line(p1, Point(5, 0))
    assert feq(Line.angle_between(l1, l1_1).evalf(), pi.evalf() / 4)

    # Testing Rays and Segments (very similar to Lines)
    assert Ray((1, 1), angle=pi / 4) == Ray((1, 1), (2, 2))
    assert Ray((1, 1), angle=pi / 2) == Ray((1, 1), (1, 2))
    assert Ray((1, 1), angle=-pi / 2) == Ray((1, 1), (1, 0))
    assert Ray((1, 1), angle=-3 * pi / 2) == Ray((1, 1), (1, 2))
    assert Ray((1, 1), angle=5 * pi / 2) == Ray((1, 1), (1, 2))
    assert Ray((1, 1), angle=5.0 * pi / 2) == Ray((1, 1), (1, 2))
    assert Ray((1, 1), angle=pi) == Ray((1, 1), (0, 1))
    assert Ray((1, 1), angle=3.0 * pi) == Ray((1, 1), (0, 1))
    assert Ray((1, 1), angle=4.0 * pi) == Ray((1, 1), (2, 1))
    assert Ray((1, 1), angle=0) == Ray((1, 1), (2, 1))
    # XXX don't know why this fails without str
    assert str(Ray((1, 1), angle=4.2 * pi)) == str(Ray(Point(1, 1), Point(2, 1 + C.tan(0.2 * pi))))
    assert Ray((1, 1), angle=5) == Ray((1, 1), (2, 1 + C.tan(5)))
    raises(ValueError, "Ray((1, 1), 1)")
#.........这里部分代码省略.........

# 需要导入模块: from sympy.geometry import Line [as 别名]
# 或者: from sympy.geometry.Line import is_parallel [as 别名]
def test_line_geom():
    x = Symbol('x', real=True)
    y = Symbol('y', real=True)
    x1 = Symbol('x1', real=True)
    y1 = Symbol('y1', real=True)
    half = Rational(1, 2)
    p1 = Point(0, 0)
    p2 = Point(1, 1)
    p3 = Point(x1, x1)
    p4 = Point(y1, y1)
    p5 = Point(x1, 1 + x1)
    p6 = Point(1, 0)
    p7 = Point(0, 1)
    p8 = Point(2, 0)
    p9 = Point(2, 1)

    l1 = Line(p1, p2)
    l2 = Line(p3, p4)
    l3 = Line(p3, p5)
    l4 = Line(p1, p6)
    l5 = Line(p1, p7)
    l6 = Line(p8, p9)
    l7 = Line(p2, p9)
    raises(ValueError, lambda: Line(Point(0, 0), Point(0, 0)))

    # Basic stuff
    assert Line((1, 1), slope=1) == Line((1, 1), (2, 2))
    assert Line((1, 1), slope=oo) == Line((1, 1), (1, 2))
    assert Line((1, 1), slope=-oo) == Line((1, 1), (1, 2))
    raises(TypeError, lambda: Line((1, 1), 1))
    assert Line(p1, p2) == Line(p1, p2)
    assert Line(p1, p2) != Line(p2, p1)
    assert l1 != l2
    assert l1 != l3
    assert l1.slope == 1
    assert l1.length == oo
    assert l3.slope == oo
    assert l4.slope == 0
    assert l4.coefficients == (0, 1, 0)
    assert l4.equation(x=x, y=y) == y
    assert l5.slope == oo
    assert l5.coefficients == (1, 0, 0)
    assert l5.equation() == x
    assert l6.equation() == x - 2
    assert l7.equation() == y - 1
    assert p1 in l1  # is p1 on the line l1?
    assert p1 not in l3
    assert Line((-x, x), (-x + 1, x - 1)).coefficients == (1, 1, 0)

    assert simplify(l1.equation()) in (x - y, y - x)
    assert simplify(l3.equation()) in (x - x1, x1 - x)

    assert Line(p1, p2).scale(2, 1) == Line(p1, p9)

    assert l2.arbitrary_point() in l2
    for ind in range(0, 5):
        assert l3.random_point() in l3

    # Orthogonality
    p1_1 = Point(-x1, x1)
    l1_1 = Line(p1, p1_1)
    assert l1.perpendicular_line(p1.args).equals( Line(Point(0, 0), Point(1, -1)) )
    assert l1.perpendicular_line(p1).equals( Line(Point(0, 0), Point(1, -1)) )
    assert Line.is_perpendicular(l1, l1_1)
    assert Line.is_perpendicular(l1, l2) is False
    p = l1.random_point()
    assert l1.perpendicular_segment(p) == p

    # Parallelity
    l2_1 = Line(p3, p5)
    assert l2.parallel_line(p1_1).equals( Line(Point(-x1, x1), Point(-y1, 2*x1 - y1)) )
    assert l2_1.parallel_line(p1.args).equals( Line(Point(0, 0), Point(0, -1)) )
    assert l2_1.parallel_line(p1).equals( Line(Point(0, 0), Point(0, -1)) )
    assert Line.is_parallel(l1, l2)
    assert Line.is_parallel(l2, l3) is False
    assert Line.is_parallel(l2, l2.parallel_line(p1_1))
    assert Line.is_parallel(l2_1, l2_1.parallel_line(p1))

    # Intersection
    assert intersection(l1, p1) == [p1]
    assert intersection(l1, p5) == []
    assert intersection(l1, l2) in [[l1], [l2]]
    assert intersection(l1, l1.parallel_line(p5)) == []

    # Concurrency
    l3_1 = Line(Point(5, x1), Point(-Rational(3, 5), x1))
    assert Line.are_concurrent(l1) is False
    assert Line.are_concurrent(l1, l3)
    assert Line.are_concurrent(l1, l1, l1, l3)
    assert Line.are_concurrent(l1, l3, l3_1)
    assert Line.are_concurrent(l1, l1_1, l3) is False

    # Projection
    assert l2.projection(p4) == p4
    assert l1.projection(p1_1) == p1
    assert l3.projection(p2) == Point(x1, 1)
    raises(GeometryError, lambda: Line(Point(0, 0), Point(1, 0))
           .projection(Circle(Point(0, 0), 1)))

    # Finding angles
#.........这里部分代码省略.........