How can i use inpolygon on my surface with the area

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.

Answer 1

[Jan Nabo]

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

[Jan Nabo]

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.