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Python | Sympy Plane.projection() method
• Last Updated : 22 Apr, 2020
In Sympy, the function `Plane.projection()` is used project the given point onto the given plane along the plane normal which means, the projection is along the normal vector direction of the plane.

```Syntax:  Plane.projection(pt)

Parameters:
pt: Point or Point3D

Returns: Point3D
```

Example #1:

 `# import sympy and Plane, Point, Point3D ` `from` `sympy ``import` `Plane, Point, Point3D ` ` `  `p ``=` `Point(``2``, ``2``) ` ` `  `# using Plane() ` `p1 ``=` `Plane(Point3D(``1``, ``2``, ``3``), normal_vector ``=``(``0``, ``1``, ``1``)) ` ` `  `# using projection() ` `projectionPoint ``=` `p1.projection(p) ` ` `  `print``(projectionPoint) `

Output:

`Point3D(2, 7/2, 3/2)`

Example #2:

 `# import sympy and Plane, Point, Point3D ` `from` `sympy ``import` `Plane, Point, Point3D ` ` `  `p ``=` `Point3D(``2``, ``2``, ``2``) ` ` `  `# using Plane() ` `p1 ``=` `Plane(Point3D(``1``, ``2``, ``3``), normal_vector ``=``(``0``, ``1``, ``1``)) ` ` `  `# using projection() ` `projectionPoint ``=` `p1.projection(p) ` ` `  `print``(projectionPoint) `

Output:

`Point3D(2, 5/2, 5/2)`

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