Plotting multi-radius spherical mesh

조회 수: 13 (최근 30일)
Daniel
Daniel 2014년 5월 16일
답변: Daniel 2014년 5월 19일
I'm attempting to plot a mesh which represents a sphere sectioned into 12 logitudinal and 22 latitudinal segments. The difficultly is that each of the segments has a different radius to show it's importance. I have used the code below to draw the sphere but can not work out how to impose the importance onto the mesh points. The commented code if used with phi and theta of lengths 12, and 22 respectively gives me points, I however, wanted the whole segment surface.
out=double(int32(rand(22,12)*9));
% phi=linspace(0,pi,12);
% theta=linspace(0,2*pi,22);
phi=linspace(0,pi,13);
theta=linspace(0,2*pi,23);
[phi,theta]=meshgrid(phi,theta);
for i = 1:22
for j=1:12
% x=out.*sin(phi).*cos(theta);
% y=out.*sin(phi).*sin(theta);
% z=out.*cos(phi);
x=out.*sin(phi).*cos(theta);
y=out.*sin(phi).*sin(theta);
z=out.*cos(phi);
end
end
mesh(x,y,z)

채택된 답변

Daniel
Daniel 2014년 5월 19일
For any one that is interested I have used the following code to anwser the question;
out=double(int32(rand(22,12)*9));
phi=linspace(0,pi,13);
theta=linspace(0,2*pi,23);
phi=[phi; phi];
theta=[theta; theta];
phi=reshape(phi,1,2*length(phi));
theta=reshape(theta,1,2*length(theta));
[phi,theta]=meshgrid(phi,theta);
r = zeros(size(phi,1),size(phi,2));
for i = 1:12
for j=1:22
r(j*2:j*2+1,i*2:i*2+1) = out(j,i);
end
end
x=r.*sin(phi).*cos(theta);
y=r.*sin(phi).*sin(theta);
z=r.*cos(phi);
mesh(x,y,z)
axis square
axis off
hidden off

추가 답변 (1개)

Daniel
Daniel 2014년 5월 16일
편집: Daniel 2014년 5월 16일
I do belive I have got much closer to the answer, see code below. So the question is how do I manipulate out a [22,12] matrix to scale the X,Y,Z values which are [46,26] matrix of the vertics.
out=double(int32(rand(22,12)*9));
phi2=linspace(0,pi,13);
theta2=linspace(0,2*pi,23);
phi3=[phi2; phi2];
theta3=[theta2; theta2];
phi4=reshape(phi3,1,2*length(phi3));
theta4=reshape(theta3,1,2*length(theta3));
[phi5,theta5]=meshgrid(phi4,theta4);
x=1*sin(phi5).*cos(theta5);
y=1*sin(phi5).*sin(theta5);
z=1*cos(phi5);
mesh(x,y,z)out=double(int32(rand(22,12)*9));

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