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.
What you're after is a helix. use the helix tool to define your path, but you'd need to work out hard numbers for the top radius, base radius and the pitch which relates to your gradient.
it is not actually a helix. i simply draw it for easier understanding of the question and clearer illustration. In the actual drainage project i am working on, i have various lines of different curvature. The pipes or the scupper drain need to slope down at 2% gradient constantly so that the water can flow from higher point to lower point.
I'd have thought, for practical and construction purposes, the contour would then be segments of helices. If there's a math formula for your curve, then probably you can try to construct it using the curve by formula tool.
How would you define your curve in plain text?
The following two images are the actual alignment lines im working onEvery yellow lines you see has to be sloped down from high point to low point following a 0.25 gradient All the lines are curved line (they look straight but they are actually curve) with some radius, almost all the lines have diff radius
the way I see it, each radius value in plan view + the sweeping angle in plan view + the gradient = 1 helical segment.
can u show an example of how you do this?
if you can post a sample of the alignment string I'll try to have a go.