Use the vector component operator with variables

You can use a vector component operator (.) to read a component of a vector variable or vector array variable.

Format	Meaning
$variable.x	left component
$variable.y	middle component
$variable.z	right component

Examples

float $temp;
vector $myvector = <<1,2,3>>;
float $temp = $myvector.z;

This assigns the right component of $myvector, 3, to the floating point variable $temp.

Suppose you have a vector initialized as follows:

vector $myvector = <<1,2,3>>;

To replace the right component of $myvector, 3, with a new value such as 7, use this technique to preserve the other two components:

$myvector = <<$myvector.x,$myvector.y,7>>;

This statement is incorrect:

$myvector.z = 3;

An error occurs. A statement can read, but not directly assign, a component of a vector variable.