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How can i use inpolygon on my surface with the area

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Jan Nabo
Jan Nabo 2019-8-29
评论： Jan Nabo 2019-8-29
If the points inside the surface it will be true and if it is outside it will be false.
So i want to paint them in blue and red, but i watched the inpolygon function in the description and i can't do the same thing on my surface.
The problem is that i create random points and they are located in x = [0,1] and y [0,2]. How can i adapt my points that are outside or inside my surface with the area from the body.
Unbenannt.jpg

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Jan Nabo
Jan Nabo 2019-8-29
I tried a little bit and now i have just the points on my surface but i want the points inside with red + and outside the surface with blue points
Unbenannt.jpg
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Jan Nabo
Jan Nabo 2019-8-29
i found out:
xx= -40:.5:10;
yy=35:.5:65;
[X,Y]= meshgrid(xx,yy)
in = inpolygon(X,Y,x,y);
imshow(in);
inM= nan(size(in),20;
inM=nan(61,101,20);
black is outside and white is inside.
now i have to add more layers and try to scale those pictures for my project.
Unbenannt.jpg

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