August 2005
Intermediate to advanced
744 pages
24h 28m
English
Content preview from Complete Maya Programming Volume II
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3.10 Cross Product 3 5
3.10 CROSS PRODUCT
The cross product is a very useful operation for calculating the vector perpendicular
to two others, the area of a parallelogram or triangle, and the sine of the angle
between two vectors. The cross product is also known as the
vector product.
3.10.1 PERPENDICULAR VECTOR
Figure 3.7 shows two vectors, a and b, and a third vector c, which is perpendicular
to the first two vectors. This is written using the perpendicular symbol _L.
c- a-Lb
The vector c is guaranteed to be at 90 degrees to the flat plane formed by the a and b
vectors.
c-axb
a\ ~/
I
/
/
FIGURE 3.7
Perpendicular ...
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