`point-lerp``point1``point2``t`procedure`point-lerp!``point1``point2``t``#!optional``dest`procedureEfficient linear interpolation (or extrapolation) between

`point1`and`point2`. sdl2:point can only hold integer values, so the results will be truncated to integers. The results will be clamped to the range -2147483648 to 2147483647.`t`is the interpolation factor (a float). Values of`t`between 0 and 1 will interpolate between`point1`and`point2`. Values of`t`less that 0 will extrapolate beyond`point1`(moving away from`point2`). Values greater that 1 will extrapolate beyond`point2`(moving away from`point1`).`point-lerp`returns a new managed sdl2:point.`point-lerp!`modifies and returns`dest`. If`dest`is omitted,`point1`is modified and returned.

Requires sdl2 egg 0.2.0 or higher.