check_step_type {nLTT}

Check if the step type is valid

Description

Will stop if not

Usage

check_step_type(step_type)

Arguments

step_type

when between two points, where the second point has both a higher x and y coordinat, which y coordinat to follow. 'step_type' can be:

• lower maintain the y-coordinat of the leftmost point

• upper already use the y-coordinat of the rightmost point