$$
f_\textit{linear}(t) =
\begin{cases}
1-t & \text{if} \quad t < 1 \\
0 & \text{otherwise}
\end{cases}
$$
falloff_linear(t) =
{ 1-t if t < 1
{ 0 otherwise
$$
f_\textit{linear}(t) =
\begin{cases}
1-t & \text{if} \quad t < 1 \\
0 & \text{otherwise}
\end{cases}
$$
falloff_linear(t) =
{ 1-t if t < 1
{ 0 otherwise