C/C++: LERP - Linear Interpolation Function

Two versions for reference:

double lerp(double a, double b, double t)
{
	return a + (b - a) * t;
}

double lerp(double a, double b, double t)
{
	return a * (1 - t) + b * t;
}

See the JavaScript LERP article for examples of using LERP and vector LERP (VLERP).

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