Moving a curve inside a figure - matlab

Question

As you can see, in the first picture I have two subplots, two the same, with the same curve position. But I need to change the curve position/or view angle of one of the subplot (doesn't matter now if the left one or the right one). The only working command is CameraViewAngle but it changes for both of it, I don't know why, and I need to be able to change for each one seperately.
As you can see in picture two, the view angle changes for both of it. I would rather chagne only the curve position.
The code I'm using is:
function [pointsQRS, pointsP, pointsT] = VCG (pointsQRS,pointsP,pointsT)
global ax1 ax2 h
figure('Name','Vektorkardiogram','NumberTitle','off','Color',[0.8 0.8 0.8])
ax1=subplot(1,2,1)
set(ax1,'Position',[0.10,0.11,0.3346590909090909,0.815],'CameraPosition',
[50.197132152696216,49.50150052184264,-7.57531754730548],'CameraTarget',
[0.4, 0.7, -0.33],'View',[-184.4219, -8.9326],'CameraViewAngle',
[9.256133109732078])
title('Vektorkardiogram')
hold on
grid on
view(3)
for i=2:size(pointsQRS,1)
if mod(i,2)==0
QRS=plot3(pointsQRS([i-1:i],1),pointsQRS([i-1:i],2),pointsQRS([i-
1:i],3),'-g','LineWidth',1);
else
plot3(pointsQRS([i-1:i],1),pointsQRS([i-1:i],2),pointsQRS([i-
1:i],3),'Color',[0 0 0],'LineWidth',1);
end
end
for i=2:size(pointsT,1)
if mod(i,2)==0
T=plot3(pointsT([i-1:i],1),pointsT([i-1:i],2),pointsT([i-1:i],3),'-
r','LineWidth',1);
else
plot3(pointsT([i-1:i],1),pointsT([i-1:i],2),pointsT([i-1:i],3),'Color',
[0 0 0],'LineWidth',1);
end
end
for i=2:size(pointsP,1)
if mod(i,2)==0
P=plot3(pointsP([i-1:i],1),pointsP([i-1:i],2),pointsP([i-1:i],3),'-
b','LineWidth',1);
else
plot3(pointsP([i-1:i],1),pointsP([i-1:i],2),pointsP([i-1:i],3),'Color',
[0 0 0],'LineWidth',1);
end
end
xlabel('Vx');ylabel('Vy');zlabel('Vz');
mArrow3([1.5 2 -1],[-0.5, 2, -1], 'stemWidth',
0.005,'color','red','facealpha',0.3);
mArrow3([1.5 2 -1],[1.5, -0.5, -1], 'stemWidth',
0.005,'color','red','facealpha',0.3);
mArrow3([1.5 2 -1],[1.5, 2, 1], 'stemWidth',
0.005,'color','red','facealpha',0.3);
text(-0.5, 2, -1, 'Vx','FontSize',12);
text(1.5, -0.5, -1, 'Vy','FontSize',12);
text(1.5, 2, 1, 'Vz','FontSize',12);
ax2=subplot(1,2,2)
set(ax2,'Position',[0.565,0.11,0.33465909090909096,0.815],'CameraPosition',
[-13.197132152696216,-59.50150052184264,10.57531754730548])
title('Vektorkardiogram')
hold on
grid on
h=linkprop([ax1, ax2],
{'CameraPosition','CameraUpVector','XTick','YTick','ZTick'});
for i=2:size(pointsQRS,1)
if mod(i,2)==0
QRS=plot3(pointsQRS([i-1:i],1),pointsQRS([i-1:i],2),pointsQRS([i-
1:i],3),'-g','LineWidth',1);
else
plot3(pointsQRS([i-1:i],1),pointsQRS([i-1:i],2),pointsQRS([i-
1:i],3),'Color',[0 0 0],'LineWidth',1);
end
end
for i=2:size(pointsT,1)
if mod(i,2)==0
T=plot3(pointsT([i-1:i],1),pointsT([i-1:i],2),pointsT([i-1:i],3),'-
r','LineWidth',1);
else
plot3(pointsT([i-1:i],1),pointsT([i-1:i],2),pointsT([i-1:i],3),'Color',
[0 0 0],'LineWidth',1);
end
end
for i=2:size(pointsP,1)
if mod(i,2)==0
P=plot3(pointsP([i-1:i],1),pointsP([i-1:i],2),pointsP([i-1:i],3),'-
b','LineWidth',1);
else
plot3(pointsP([i-1:i],1),pointsP([i-1:i],2),pointsP([i-1:i],3),'Color',
[0 0 0],'LineWidth',1);
end
end
xlabel('Vx');ylabel('Vy');zlabel('Vz');
mArrow3([1.5 2 -1],[-0.5, 2, -1], 'stemWidth',
0.005,'color','red','facealpha',0.3);
mArrow3([1.5 2 -1],[1.5, -0.5, -1], 'stemWidth',
0.005,'color','red','facealpha',0.3);
mArrow3([1.5 2 -1],[1.5, 2, 1], 'stemWidth',
0.005,'color','red','facealpha',0.3);
text(-0.5, 2, -1, 'Vx','FontSize',12);
text(1.5, -0.5, -1, 'Vy','FontSize',12);
text(1.5, 2, 1, 'Vz','FontSize',12);
linkaxes([ax1, ax2])
I need it to change it in order to achieve 3D stereoscopic view using Google Cardboard.
Thank you in advance for any help!
PS: For example I want to achieve something as in the picture 3
But in the picture three the 3D curves are not connected, by connected I mean that while I move with one of them, the other one will be moved in the same way.

Answer 1

I managed to partially solve it.
Changing CameraViewAngle, modifies the size of the curve, so I decided to keep it unmodified.
Instead of setting the angle, set CameraPosition of ax2 to be different than ax1, but keeping the same distance from the target.
Instead of using linkprop, I used addlistener, and implemented a callback function that sets the CameraPosition of ax2 when CameraPosition of ax1 is modified.
Read the following reference pages:
addlistener
View Control with the Camera Toolbar
Camera Graphics Terminology
Axes Properties
Share Data Among Callbacks
Here is the code:
function [pointsQRS, pointsP, pointsT] = VCG (pointsQRS,pointsP,pointsT)
%Clear global varabiles - for testing, we don't want any leftovers of ax1 and ax2.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
clear global
close all
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Set some input data.
pointsQRS = 1:3:78;
pointsP = 1:2:92;
pointsT = 1:1:85;
%global ax1 ax2 h
fig1 = figure('Name','Vektorkardiogram','NumberTitle','off','Color',[0.8 0.8 0.8]);
ax1=subplot(1,2,1);
%Don't use view command, fill all parameters manually.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%view(ax1, 3)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Set ax1 parameters values to be same as result as after executing view(ax1, 3)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
set(ax1, 'XLim', [-0.5, 2.0], 'YLim', [-1, 3.0], 'ZLim', [-1.5, 1.0]);
set(ax1, 'Position',[0.13, 0.11, 0.3346590909090909, 0.815]);
set(ax1, 'CameraViewAngle', 10.339584907201974);
set(ax1, 'CameraTarget', [0.75, 1.0, -0.25]);
set(ax1, 'View',[-184.4219, -8.9326]);
set(ax1, 'DataAspectRatio', [1, 1.6, 1.0]);
set(ax1, 'PlotBoxAspectRatio', [1, 0.95521169259094, 0.8871534463389812], 'PlotBoxAspectRatioMode', 'Manual');
set(ax1, 'CameraPosition', [-10.664276793913514,-22.800600208737055,10.57531754730548]);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
ax2 = subplot(1,2,2);
%Set ax2 parameters values to be same as result as after executing view(ax2, 3)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
set(ax2, 'XLim', [-0.5, 2.0], 'YLim', [-1, 3.0], 'ZLim', [-1.5, 1.0]);
set(ax2, 'Position',[0.5703409090909091, 0.11, 0.3346590909090909, 0.815]);
set(ax2, 'CameraViewAngle', 10.339584907201974);
set(ax2, 'CameraTarget', [0.75, 1.0, -0.25]);
set(ax2, 'View',[-184.4219, -8.9326]);
set(ax2, 'DataAspectRatio', [1, 1.6, 1.0]);
set(ax2, 'PlotBoxAspectRatio', [1, 0.95521169259094, 0.8871534463389812], 'PlotBoxAspectRatioMode', 'Manual');
set(ax2, 'CameraPosition', [-10.664276793913514,-22.800600208737055,10.57531754730548]);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Move the camera of ax2 to be in different position compared to ax1, but keep the same distance from the Target.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
cameraTarget = [0.75, 1.0, -0.25];
cameraPosition = [-10.664276793913514,-22.800600208737055,10.57531754730548];
V = cameraPosition - cameraTarget;
newV = V + [-10, 0, 0];
newV = newV/norm(newV)*norm(V);
newCameraPosition = cameraTarget + newV;
set(ax2, 'CameraPosition', newCameraPosition);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Store ax1 and ax2 in figure UserData
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
set(fig1, 'UserData', [ax1, ax2]);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Set axes ax1 as active axes.
axes(ax1);
title('Vektorkardiogram')
hold on
grid on
%Move view(3) up
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%view(3)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Use plot3 from Matlab example (fill curve with some data).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%t = -3*pi:pi/50:3*pi;st = sin(t)*2;ct = cos(t)*2;plot3(st,ct,t/6)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
for i=2:size(pointsQRS,1)
if mod(i,2)==0
QRS=plot3(pointsQRS([i-1:i],1),pointsQRS([i-1:i],2),pointsQRS([i-1:i],3),'-g','LineWidth',1);
else
plot3(pointsQRS([i-1:i],1),pointsQRS([i-1:i],2),pointsQRS([i-1:i],3),'Color',[0 0 0],'LineWidth',1);
end
end
for i=2:size(pointsT,1)
if mod(i,2)==0
T=plot3(pointsT([i-1:i],1),pointsT([i-1:i],2),pointsT([i-1:i],3),'-r','LineWidth',1);
else
plot3(pointsT([i-1:i],1),pointsT([i-1:i],2),pointsT([i-1:i],3),'Color',[0 0 0],'LineWidth',1);
end
end
for i=2:size(pointsP,1)
if mod(i,2)==0
P=plot3(pointsP([i-1:i],1),pointsP([i-1:i],2),pointsP([i-1:i],3),'-b','LineWidth',1);
else
plot3(pointsP([i-1:i],1),pointsP([i-1:i],2),pointsP([i-1:i],3),'Color',[0 0 0],'LineWidth',1);
end
end
xlabel('Vx');ylabel('Vy');zlabel('Vz');
mArrow3([1.5 2 -1],[-0.5, 2, -1], 'stemWidth', 0.005,'color','red','facealpha',0.3);
mArrow3([1.5 2 -1],[1.5, -0.5, -1], 'stemWidth', 0.005,'color','red','facealpha',0.3);
mArrow3([1.5 2 -1],[1.5, 2, 1], 'stemWidth', 0.005,'color','red','facealpha',0.3);
text(-0.5, 2, -1, 'Vx','FontSize',12);
text(1.5, -0.5, -1, 'Vy','FontSize',12);
text(1.5, 2, 1, 'Vz','FontSize',12);
%ax2 = subplot(1,2,2); Moved up, axes(ax2) is used instead.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%ax2 = subplot(1,2,2);
axes(ax2)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
title('Vektorkardiogram')
hold on
grid on
%Move linkprop to the end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%h=linkprop([ax1, ax2],{'CameraPosition', 'CameraUpVector', 'XTick', 'YTick', 'ZTick'});
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
for i=2:size(pointsQRS,1)
if mod(i,2)==0
QRS=plot3(pointsQRS([i-1:i],1),pointsQRS([i-1:i],2),pointsQRS([i-1:i],3),'-g','LineWidth',1);
else
plot3(pointsQRS([i-1:i],1),pointsQRS([i-1:i],2),pointsQRS([i-1:i],3),'Color',[0 0 0],'LineWidth',1);
end
end
for i=2:size(pointsT,1)
if mod(i,2)==0
T=plot3(pointsT([i-1:i],1),pointsT([i-1:i],2),pointsT([i-1:i],3),'-r','LineWidth',1);
else
plot3(pointsT([i-1:i],1),pointsT([i-1:i],2),pointsT([i-1:i],3),'Color',[0 0 0],'LineWidth',1);
end
end
for i=2:size(pointsP,1)
if mod(i,2)==0
P=plot3(pointsP([i-1:i],1),pointsP([i-1:i],2),pointsP([i-1:i],3),'-b','LineWidth',1);
else
plot3(pointsP([i-1:i],1),pointsP([i-1:i],2),pointsP([i-1:i],3),'Color',[0 0 0],'LineWidth',1);
end
end
%Use plot3 from Matlab example (fill curve with some data).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%t = -3*pi:pi/50:3*pi;st = sin(t)*2;ct = cos(t)*2;plot3(ax2, st,ct,t/6)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
xlabel('Vx');ylabel('Vy');zlabel('Vz');
mArrow3([1.5 2 -1],[-0.5, 2, -1], 'stemWidth', 0.005,'color','red','facealpha',0.3);
mArrow3([1.5 2 -1],[1.5, -0.5, -1], 'stemWidth', 0.005,'color','red','facealpha',0.3);
mArrow3([1.5 2 -1],[1.5, 2, 1], 'stemWidth', 0.005,'color','red','facealpha',0.3);
text(-0.5, 2, -1, 'Vx','FontSize',12);
text(1.5, -0.5, -1, 'Vy','FontSize',12);
text(1.5, 2, 1, 'Vz','FontSize',12);
%view(ax1, 3)
%view(ax2, 3)
%Matalb gives warning message: linkaxes requires 2-D axes as input. Use linkprop for generic property linking.
%call linkprop here instead.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%linkaxes([ax1, ax2])
%h=linkprop([ax1, ax2],{'CameraPosition', 'CameraUpVector', 'XTick', 'YTick', 'ZTick'});
%Don't link CameraPosition - it is linked by "listener" implementation
linkprop([ax1, ax2],{'CameraUpVector', 'XTick', 'YTick', 'ZTick'});
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Add "listener", instead of using linkprop
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
addlistener(ax1, 'CameraPosition', 'PostSet', #Ax1CameraPositionCallback);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Display cameratoolbar
cameratoolbar
function Ax1CameraPositionCallback(src, evnt, ~)
ax1 = evnt.AffectedObject;
fig1 = get(ax1, 'Parent');
userData = get(fig1, 'UserData');
ax2 = userData(2);
%Move the camera of ax2 to be in different position compared to ax1, but keep the same distance from the Target.
cameraTarget = get(ax1, 'CameraTarget');
cameraPosition = get(ax1, 'CameraPosition');
V = cameraPosition - cameraTarget;
newV = V + [-10, 0, 0];
newV = newV/norm(newV)*norm(V);
newCameraPosition = cameraTarget + newV;
set(ax2, 'CameraPosition', newCameraPosition);