33 lines
764 B
Python
33 lines
764 B
Python
class Vector4d:
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def __init__(self, x, y, z, w):
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self.x = x
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self.y = y
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self.z = z
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self.w = w
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class Vector3d:
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def __init__(self, x, y, z):
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self.x = x
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self.y = y
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self.z = z
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def cross_product(self, vector3d):
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# Returns a line that is perpendicular to the parameter
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# and self.
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# Returns the 'normal'.
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x = self.y * vector3d.z - self.z * vector3d.y
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y = self.z * vector3d.x - self.x * vector3d.z
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z = self.x * vector3d.y - self.y * vector3d.x
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return Vector3d(x, y, z)
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def dot_product(self, vector3d):
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# Returns a scalar that defines how similar two
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# vectors are to one another.
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return self.x * vector3d.x + self.y * vector3d.y + self.z * vector3d.z
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class Vector2d:
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def __init__(self, x, y):
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self.x = x
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self.y = y
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