I need to model a complex profile with gradient.
From the top view, the alignment line have various curves and its not straight. From the side view, the alignment line is straight and sloping downwards at 2% gradient. The percentage doesn't matter the key question here is the sloping downwards while maintaining the top view profile.
For illustration purpose, i made a comparison showing what happen when its a straight line with gradient.
each horizontal curve (Ch) corresponds to a helix.
Helix radius = Ch radius
Helix height = Ch radius * Ch sweeping angle (in radians) * gradient
Helix pitch = Ch radius * 2 * Pi * gradient
Answer Verified By: Kang Teng Teng
can u describe how this is done?
Here you go.
Bentley Question 2_helix.dgn
Bentley Question 2.dgn
sure. here is a sample of the alignment line extracted from the file
if you can post a sample of the alignment string I'll try to have a go.