Reading Point Cloud, manipulate and change it using keyboard KeyPressFcn

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Pawel Burdziakowski 2020-11-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/655938-reading-point-cloud-manipulate-and-change-it-using-keyboard-keypressfcn

My problem is to open stacked point clouds in the given path, visualize, manipulate it, and safe manipulated as a new cloud.

All seems to be ok, but when I open point cloud in Figue using pcshow, it somehow exits function called after 'KeyPressFcn' .

In other words, after pushing arrow point cloud is showed in figure but it exits the function and not reacts on other keys, when i use only displays in the case swich all works, means that this function is working and is not exited till figure is opened.

Any solutions ? I will apreciate any help. Best regards.

My acactual code:

% Tested: Matlab 2020a;
clc
clear all
close all
warning off
orgin_path  = 'D:/Dataset';
generated_path  = './output';
%% Read PC
ptStack = imageDatastore(orgin_path,...
    'ReadFcn',@pc_reader,...    
    'FileExtensions','.txt',...
    'IncludeSubfolders',true,...
    'LabelSource','foldernames');
h = figure; 
set(h,'KeyPressFcn',{@KeyPressCb ptStack});
    %pcshow(ptCloud);
    %title(ptFileInfo.Label)
%% Local Functions
% PC reader
 function ptCloud = pc_reader(filename) % 
         points = table2array(readtable(filename));
         ptCloud = pointCloud(points);
 end
 % Keyboard
  function KeyPressCb(~,evnt,ptstack)
        fprintf('key pressed: %s\n',evnt.Key);
        
        [ptCloud, ptFileInfo] =  readimage(ptstack,1);
        switch evnt.Key
            case 'leftarrow' %next point cloud
                disp('case 1')  
                %pcshow(ptCloud) ??   ############ problem here or
            case 'rightarrow' %previeus point cloud
                disp('case 2')
                
            case 'uparrow'
                disp('case 3') 
                % function to manipulate PC Rotate X
            case 'downarrow'
                disp('case 4')
                % Rotate Y
            case 'escape'
                disp('case 5')
                % close manipulation
            case 'return'
                disp('case 6')
                %save manipulated point cloud
        end
            pcshow(ptCloud) % ??  ########## problem here
       
end