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Function multiplyScalarAndAdd

multiplyScalarAndAdd(
    out: mat2,
    a: ReadonlyMat2,
    b: ReadonlyMat2,
    scale: number,
): mat2
Adds two mat2's after multiplying each element of the second operand by a scalar value.
Parameters
- out: mat2
  the receiving vector
- a: ReadonlyMat2
  the first operand
- b: ReadonlyMat2
  the second operand
- scale: number
  the amount to scale b's elements by before adding
Returns mat2
out

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