Function clamp

clamp<T>(operand, lowerBound, upperBound): Expression<T>
Returns an expression that limits an operand to a range. The type of the bounds should be the same.
```
  var _ = ExpressionFactory;
  //Evaluates to 47.
  var number = _.clamp(_.number(42), _.number(47), _.number(83));
  //Evaluates to a point with values clamped between 47 and 83.
  var clamped = _.clamp(_.point(p1), _.number(47), _.number(83));
  //Evaluates to a point with values of p1 clamped between p2 and p3.
  var elementsIndividuallyClamped = _.clamp(_.point(p1), _.point(p2), _.point(p3));
```
Type Parameters
- T extends string | number | Vector3
Parameters
- operand: Expression<T>
  The operand to evaluate. Should result in a number, point or color.
- lowerBound: Expression<number | T>
  The lowerBound to evaluate. Should result in the same type as operand or a number.
- upperBound: Expression<number | T>
  The upperBound to evaluate. Should result in the same type as lowerBound.
Returns Expression<T>
An expression that limits a value to the given range. Results in a number, point or color depending on the type of the operands. When a number is used with an other type, the operation is applied to the individual element values and the result is of the other type.