constructing Parallel curves offset
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Can anyoane tell be if it is possible to buil in Matlab an offset for a curve ? If yes, which is the approche ? This is what I got until now. I think the offset is changing because of the concavity.
Thank you very much in advance.
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Star Strider
2017-2-23
See if this does what you want:
x = [10 30 10 25]; % Create Data: Original
y = 10 : 20 : 70; % Create Data: Original
xof1 = x - 2; % Create Data: Negative Offset
xof2 = x + 2; % Create Data: Positive Offset
figure(1)
plot(x, y)
hold on
plot(xof1, y)
plot(xof2, y)
hold off
axis([-20 60 10 70])
4 个评论
Andries Paula
2017-2-24
编辑：Andries Paula
2017-2-24
Hey,
Thank you very much for your response.
yes, but if I am trying with this coordinates the offsets are not parallel lines anymore. I think I need to use formulas for gradient and radius of curvature.
x=1:100;
y=sin(x);
xof1 = x - 2;
xof2 = x + 2;
Star Strider
2017-2-24
My pleasure.
The curves are now offset in the y-direction.
What do you want to do, and how do you want to calculate ‘Inner Parallel’ and ‘Outer Parallel’?
What do they represent?
Is it a regression curve with confidence intervals?
Andries Paula
2017-2-24
Hey,
I have coordinates ( X and Y ) for a road, and I need to draw right and left offsets to the road lines. I wrote a program using the gradient, normal vector, cancavity and the radius of curviture, but the result it is not correct.
Star Strider
2017-2-24
Road design is not an area of my expertise. I have no idea what the constraints and other problems are.
You may need to use more points to approximate your road centre-line and the parallels.
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