Drawing an arc between two elements?
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I want to draw an arc (given its centre and its radius) between two elements.
For example the case given in the image below. I would like to draw an arc (of radius 0.5 (as an example) and the centre de point P drawed) strictly between those two lines
What is the general case of doing it? I mean, in this particular case there are two lines, but I would like a method that would work for whatever elements between I'd want to draw an arc (between a circle and a line, between two circles...etc).
2 个评论
KSSV
2020-10-22
You have not commented on your previous question...
If the answer worked for you..you have to acknowledge the users who have helped you. With out closing that question, you are asking another question similiar ti it?
ErikJon Pérez Mardaras
2020-10-22
采纳的回答
KSSV
2020-10-22
L1=[1 3;
1 6]
L2=[-2 2;
8 -1]
P=InterX(L1,L2);
L = [L2(:,1) P L1(:,2)] ;
p = polyfit(L(1,:),L(2,:),2) ;
xi = linspace(min(L(1,:)),max(L(1,:))) ;
yi = polyval(p,xi) ;
figure
hold on
plot(L1(1,:),L1(2,:),'r')
plot(L2(1,:),L2(2,:),'b')
plot(P(1),P(2),'ro')
plot(xi,yi,'k')
7 个评论
ErikJon Pérez Mardaras
2020-10-22
编辑：ErikJon Pérez Mardaras
2020-10-22
The arc I`m looking for is that one in green:
KSSV
2020-10-22
Okay...get the angles...th1 and th2.
th = linspace(th1,th2);
xc = r*cos(th) ;
yc = r*sin(th) ;
You can use slope formula to get angles.
ErikJon Pérez Mardaras
2020-10-23
编辑：ErikJon Pérez Mardaras
2020-10-23
I tried it out in a blank grpah just to try. th1 and th2 are 90º. I tried that code and it didn`t work
The code I entered was that:
axis equal
hold on
th = linspace(0,90);
xc = 0.5*cos(th) ;
yc = 0.5*sin(th) ;
plot(xc,yc,'r')
KSSV
2020-10-23
Your th is in degrees.....
th = linspace(0,pi/2);
xc = 0.5*cos(th) ;
yc = 0.5*sin(th) ;
plot(xc,yc,'r')
ErikJon Pérez Mardaras
2020-10-23
KSSV
2020-10-23
xc = 2+0.5*cos(Th) ;
yc = 10+0.5*sin(th) ;
ErikJon Pérez Mardaras
2020-10-25
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