14.5.4  Vectors in space: vector

See Section 13.7.4 for vectors in the plane.

The vector command returns and draws vectors. It can takes its arguments in different ways.

The coordinates of the vector.

• vector takes one argument:
  L, a list of the coordinates of the vector.
• vector(L) returns and draws the vector with the given coordinates, starting from the origin.

Example.
Input:

Output:

Two points or a point and a vector.

• vector takes two arguments:
  • P, a point.
  • Q, a point or a vector.
• vector(P,Q) returns and draws the corresponding vector. If the arguments are two points, the vector goes from P to Q. If the arguments are a point and a vector, then the vector starts at P.

Examples.

• Input:
  vector(point(-1,0,0),point(0,1,2))
  or:
  vector([-1,0,0],[0,1,2])
  Output:
  
• Input:

  V:= vector([-1,0,0],[0,1,2])

  vector(point(-1,2,0),V)

  Output: