**CIGAL Reference Manual, Chapter 6 (RealTime): r_vecmult**
===== r_vecmult -- Multiply (or divide) vector variables =====
**usage:   r_vecmult   opflg eflag ltime    Vec1 Vec2 NewVec Flag**

R_VECMULT is a REALTIME operator that multiplies values to 2-D or 3-D vector VEC1.

VEC2 can be another vector (same dimension as VEC1), or it can be a scalar value.
If it is a scalar (single value) then it will be multiplied by every element of VEC1.

NEWVEC is the output vector; it must be the same dimension as VEC1.\\
If NEWVEC is not specified, the new values will be stored in VEC1.

  FLAG: 0 - default
        2 - 2-D vectors (default)
        3 - 3-D vectors
        4 - divide VEC1 by VEC2 (instead of multiplying)
        8 - just use 1 value from VEC2 (scalar multiplication)

**See Also:**\\
[[jvs:cigal:manual:chapter6:r_vecadd|R_VECADD]]

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