Answer:
Explanation:
The + and - designations are important in computer programming, especially with video game development.
In video games, the motion of characters or objects and defined with vectors, just like this. However, in computer code, we have no way of cleanly saying "to the east," or "to the left."
So instead, we will have something written like this: (assuming that "num" is a Vector object).
num = (+1,0,0);
This states that the vector called num is +1 on the X axis. If it were written as (0,-1,0), then this would denote that the object moves -1 on the Y axis, or what we might call "down".
So the + and - don't mean that the actual value is negative, it just means that it is forward / backward relative to the * starting point * on the axis.
So if the object is originally at (4, 2, 7), and the object moves, or is displaced, by a vector of (-1, 2, 0), then the final position is at (3, 4, 7).
So + and - don't represent true positive and negative values, in this case, they just try to show whether or not a value on the X, Y, or Z access has increased or decreased from it's original spot / value.
This is an important concept in video game development, and takes up a large portion of programming a typical video game.