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Jelly, 14 12 bytes

Œṙ+\µQ⁼ȧṛ/¬$

This is my first time golfing in Jelly. Suggestions are welcome.

Input is as an array of [direction, distance] pairs, where the direction is given as a complex number.

Explanation:

Œṙ+\µÇȧṛ/¬$   Main link. Argument: n     = [[i, 3], [1, 2], [-i, 3]]
Œṙ            Run-length decode          = [i, i, i, 1, 1, -i, -i, -i]
  +\          Cumulative sum             = [i, 2i, 3i, 3i+1, 3i+2, 2i+2, i+2, i]
    µ         Begin a new monadic chain
     Q        Remove duplicates          = [i, 2i, 3i, 3i+1, 3i+2, 2i+2, i+2, i]
      ⁼       Equal to original?         = 1
           $  Make a monadic link:
        ṛ/      Reduce by right argument   = i
                (Gets the last element)
          ¬     Logical NOT:               = 0
       ȧ      Logical AND the two values = 0

Jelly, 14 12 bytes

Œṙ+\µQ⁼ȧṛ/¬$

This is my first time golfing in Jelly. Suggestions are welcome.

Input is as an array of [direction, distance] pairs, where the direction is given as a complex number.

Explanation:

Œṙ+\µÇȧṛ/¬$   Main link. Argument: n     = [[i, 3], [1, 2], [-i, 3]]
Œṙ            Run-length decode          = [i, i, i, 1, 1, -i, -i, -i]
  +\          Cumulative sum             = [i, 2i, 3i, 3i+1, 3i+2, 2i+2, i+2, i]
    µ         Begin a new monadic chain
     Q        Remove duplicates          = [i, 2i, 3i, 3i+1, 3i+2, 2i+2, i+2]
      ⁼       Equal to original?         = 0
           $  Make a monadic link:
        ṛ/      Reduce by right argument   = i
                (Gets the last element)
          ¬     Logical NOT:               = 0
       ȧ      Logical AND the two values = 0

Jelly, 14 12 bytes

Œṙ+\µQ⁼ȧṛ/¬$

This is my first time golfing in Jelly. Suggestions are welcome.

Input is as an array of [direction, distance] pairs, where the direction is given as a complex number.

Explanation:

Œṙ+\µÇȧṛ/¬$   Main link. Argument: n     = [[i, 3], [1, 2], [-i, 3]]
Œṙ            Run-length decode          = [i, i, i, 1, 1, -i, -i, -i]
  +\          Cumulative sum             = [i, 2i, 3i, 3i+1, 3i+2, 2i+2, i+2, i]
    µ         Begin a new monadic chain
     Q        Remove duplicates          = [i, 2i, 3i, 3i+1, 3i+2, 2i+2, i+2, i]
      ⁼       Equal to original?         = 1
           $  Make a monadic link:
        ṛ/      Reduce by right argument   = i
                (Gets the last element)
          ¬     Logical NOT:               = 0
       ȧ      Logical AND the two values = 0

Jelly, 14 12 bytes

Œṙ+\µQ⁼ȧṛ/¬$

This is my first time golfing in Jelly. Suggestions are welcome.

Input is as an array of [direction, distance] pairs, where the direction is given as a complex number.

Explanation:

Œṙ+\µÇȧṛ/¬$   Main link. Argument: n     = [[i, 3], [1, 2], [-i, 3]]
Œṙ            Run-length decode          = [i, i, i, 1, 1, -i, -i, -i]
  +\          Cumulative sum             = [i, 2i, 3i, 3i+1, 3i+2, 2i+2, i+2, i]
    µ         Begin a new monadic chain
     Q        Remove duplicates          = [i, 2i, 3i, 3i+1, 3i+2, 2i+2, i+2, i]
      ⁼       Equal to original?         = 1
           $  Make a monadic link:
        ṛ/      Reduce by right argument   = i
                (Gets the last element)
          ¬     Logical NOT:               = 0
       ȧ      Logical AND the two values = 0

Jelly, 14 bytes

Q⁼
Œṙ+\µÇȧṛ/¬$

This is my first time golfing in Jelly. Suggestions are welcome.

Input is as an array of [direction, distance] pairs, where the direction is given as a complex number.

Jelly, 14 12 bytes

Œṙ+\µQ⁼ȧṛ/¬$

This is my first time golfing in Jelly. Suggestions are welcome.

Input is as an array of [direction, distance] pairs, where the direction is given as a complex number.

Explanation:

Œṙ+\µÇȧṛ/¬$   Main link. Argument: n     = [[i, 3], [1, 2], [-i, 3]]
Œṙ            Run-length decode          = [i, i, i, 1, 1, -i, -i, -i]
  +\          Cumulative sum             = [i, 2i, 3i, 3i+1, 3i+2, 2i+2, i+2, i]
    µ         Begin a new monadic chain
     Q        Remove duplicates          = [i, 2i, 3i, 3i+1, 3i+2, 2i+2, i+2, i]
      ⁼       Equal to original?         = 1
           $  Make a monadic link:
        ṛ/      Reduce by right argument   = i
                (Gets the last element)
          ¬     Logical NOT:               = 0
       ȧ      Logical AND the two values = 0