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Fix wording for scalar multiplication of vectors (#7631)

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Also add an example for multiplication with a negative scalar
This commit is contained in:
Markus Sauermann
2023-07-17 17:16:09 +02:00
committed by Max Hilbrunner
parent d1824a4ee5
commit dfe6cce640
1 changed files with 5 additions and 2 deletions
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7
tutorials/math/vector_math.rst
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@@ -138,16 +138,19 @@ A vector can be multiplied by a **scalar**:
var c = a * 2 # (2, 5) * 2 = (4, 10)
var d = b / 3 # (3, 6) / 3 = (1, 2)
var e = d * -2 # (1, 2) * -2 = (-2, -4)
.. code-tab:: csharp
var c = a * 2; // (2, 5) * 2 = (4, 10)
var d = b / 3; // (3, 6) / 3 = (1, 2)
var e = d * -2; // (1, 2) * -2 = (-2, -4)
.. image:: img/vector_mult1.png
.. note:: Multiplying a vector by a scalar does not change its direction, only
its magnitude. This is how you **scale** a vector.
.. note:: Multiplying a vector by a positive scalar does not change its direction, only
its magnitude. Multiplying with a negative scalar results in a vector in the
opposite direction. This is how you **scale** a vector.
Practical applications
~~~~~~~~~~~~~~~~~~~~~~