$//$TASK $1$: transform the vertex to clip space using

$//$ the model view and projection matrices

o$.$vertex $=$ mul$($model$,$ v$.$vertex$)$;

O$.$uv $=$ TRANSFORM$\_$TEX$($v$.$uv$,\_$MainTex$)$;

o$.$norm $=$

mul$($UNITY$\_$MATRIXM,

float$4($v$.$normal.x$,$ v$.$normal.y$,$ v$.$normal.z$,0\mathrm{.}0))$;

return $0_5$

$\}$