# Point

class compas.geometry.Point(x, y, z=0.0, **kwargs)[source]

A point is defined by XYZ coordinates.

Parameters
• x (float) – The X coordinate of the point.

• y (float) – The Y coordinate of the point.

• z (float, optional) – The Z coordinate of the point. Default is 0.0.

Attributes
• data (dict) – The data representation of the point.

• x (float) – The X coordinate of the point.

• y (float) – The Y coordinate of the point.

• z (float) – The Z coordinate of the point.

Notes

A Point object supports direct access to its xyz coordinates through the dot notation, as well list-style access using indices. Indexed access is implemented such that the Point behaves like a circular list 1.

References

1

Stack Overflow. Pythonic Circular List. Available at: https://stackoverflow.com/questions/8951020/pythonic-circular-list.

Examples

>>> p1 = Point(1, 2, 3)
>>> p2 = Point(4, 5, 6)


The XYZ coordinates of point objects can be accessed as object attributes or by trating the points as lists.

>>> p1.x
1.0
>>> p1.y
2.0
>>> p1.z
3.0
>>> p1[0]
1.0
>>> p1[1]
2.0
>>> p1[2]
3.0


Point objects support basic arithmetic operations.

>>> p1 + p2
Point(5.000, 7.000, 9.000)
>>> p1 * 2
Point(2.000, 4.000, 6.000)
>>> p1 ** 2
Point(1.000, 4.000, 9.000)
>>> p1
Point(1.000, 2.000, 3.000)


Points and lists can be used interchangeably.

>>> p1 + [4, 5, 6]
Point(5.000, 7.000, 9.000)


Arithmetic operations can also be applied to modify a point object in-place.

>>> p1 += p2
>>> p1 *= 2
>>> p1 **= 2
>>> p1
Point(100.000, 196.000, 324.000)


Methods

 copy([cls]) Make an independent copy of the data object. Compute the distance to a line. distance_to_plane(plane) Compute the distance to a plane. distance_to_point(point) Compute the distance to another point. from_data(data) Construct a point from a data dict. from_json(filepath) Construct an object from serialized data contained in a JSON file. from_jsonstring(string) Construct an object from serialized data contained in a JSON string. in_circle(circle) Determine if the point lies inside the given circle. in_polygon(polygon[, convex]) Determine if the point lies inside the given polygon. in_polyhedron(polyhedron) Determine if the point lies inside the given polyhedron. in_triangle(triangle) Determine if the point lies inside the given triangle. on_circle(circle) Determine if the point lies on the given circle. on_line(line) Determine if the point lies on the given line. on_polyline(polyline) Determine if the point lies on the given polyline. on_segment(segment) Determine if the point lies on the given segment. Convert an object to its native data representation. to_json(filepath[, pretty]) Serialize the data representation of an object to a JSON file. to_jsonstring([pretty]) Serialize the data representation of an object to a JSON string. Transform this point. transform_collection(collection, X) Transform a collection of points. transformed(transformation) Returns a transformed copy of this geometry. transformed_collection(collection, X) Create a collection of transformed points. Validate the object's data against its data schema (self.DATASCHEMA). Validate the object's data against its json schema (self.JSONSCHEMA).