Any idea on why a particular line of code is not read even in the debugging mode?

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Franck paulin Ludovig pehn Mayo
评论： Voss 2022-7-2
I am trying to run a code. I would like that each time the pointer enters a region , it turns green..But i have been uncessful. It is the last "paragraph" of the code.
The line in question is
"set(handles.region1,'FaceColor','g'); "
function varargout = hapticpen(varargin)
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @hapticpen_OpeningFcn, ...
'gui_OutputFcn', @hapticpen_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before hapticpen is made visible.
function hapticpen_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to hapticpen (see VARARGIN)
% Choose default command line output for hapticpen
handles.output = hObject;
%
handles.region1 = [];
% % Create the Arduino serial object
% handles.arduinoObj = serialport('COM1', 38400);
% configureTerminator(handles.arduinoObj,'CR/LF');
% %
% for i=1:8
% handles.message = readline(handles.arduinoObj);
% disp(handles.message)
% end
% create_patch(handles);
% Update handles structure
guidata(hObject, handles);
% function create_patch(handles)
% if ishandle(handles.region1)
% delete(handles.region1);
% end
handles.region1 = patch( ...
'Parent',handles.axes1, ...
'XData',[5 5 20 10], ...
'YData',[0 10 15 0], ...
'FaceColor','red');
set(handles.axes1,'XLim',[-10 10],'YLim',[0 10]);
%set(handles.axes1,'XLim',[0 5],'YLim',[0 10]);
set(handles.axes1,'XGrid','on','YGrid','on');
axis(handles.axes1,'equal');
% Update handles structure
%guidata(handles.fig_hapticpen,handles);
guidata(hObject, handles);
% call the button motion fcn to update the new patch's color:
fig_hapticpen_WindowButtonMotionFcn(handles.fig_hapticpen);
% UIWAIT makes hapticpen wait for user response (see UIRESUME)
% uiwait(handles.fig_hapticpen);
% --- Outputs from this function are returned to the command line.
function varargout = hapticpen_OutputFcn(~, eventdata, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output;
% --- Executes on mouse motion over figure - except title and menu.
function fig_hapticpen_WindowButtonMotionFcn(hObject, ~, handles)
% hObject handle to fig_hapticpen (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
handles = guidata(hObject);
pos = get (hObject,'currentpoint');
global x;
global y;
x = pos(1);
y = pos(2);% assign location to x and y
set(handles.lbl_x,'string',['x loc:' num2str(x)]); %update text for x loc
set(handles.lbl_y,'string',['y loc:' num2str(y)]); %update text for x loc
% Determine if mouse is within the region
p_x = get(handles.region1,'XData');
p_x = p_x([1 2]);
p_y = get(handles.region1,'YData');
p_y = p_y([1 3]);
ax_xl = get(handles.axes1,'XLim');
ax_yl = get(handles.axes1,'YLim');
ax_units = get(handles.axes1,'Units');
if ~strcmp(ax_units,'pixels')
set(handles.axes1,'Units','pixels')
end
ax_pos = get(handles.axes1,'Position'); % axes1 position in pixels
if ~strcmp(ax_units,'pixels')
set(handles.axes1,'Units',ax_units);
end
% convert the patch XData and YData from axes coordinates to figure coordinates in pixels
p_x = (p_x-ax_xl(1))/(ax_xl(2)-ax_xl(1))*ax_pos(3)+ax_pos(1);
p_y = (p_y-ax_yl(1))/(ax_yl(2)-ax_yl(1))*ax_pos(4)+ax_pos(2);
if x >= p_x(1) && x <= p_x(2) && y >= p_y(1) && y <= p_y(2)
set(handles.region1,'FaceColor','g');
% writeline(handles.arduinoObj, '1&1!')
else
set(handles.region1,'FaceColor','r');
%writeline(handles.arduinoObj, '0&1!')
end
guidata(hObject, handles);

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采纳的回答

Voss
Voss 2022-7-2
Ran in:
Checking whether x and y are each within some constant limits, like you have:
if x >= p_x(1) && x <= p_x(2) && y >= p_y(1) && y <= p_y(2)
is equivalent to checking whether the point (x,y) is within a rectangular region.
But in this case the patch is not a rectangle:
handles.axes1 = gca();
handles.region1 = patch( ...
'Parent',handles.axes1, ...
'XData',[5 5 20 10], ...
'YData',[0 10 15 0], ...
'FaceColor','red');
So you'd have to use inpolygon or equivalent to determine whether the cursor is on the patch.
Also, the rectangular region you're actually checking has zero width, because p_x(1) == p_x(2):
p_x = get(handles.region1,'XData');
p_x = p_x([1 2])
p_x = 2×1
5 5
And it extends beyond the patch in the y direction:
p_y = get(handles.region1,'YData');
p_y = p_y([1 3])
p_y = 2×1
0 15
In other words, the region you're checking is a line along the left edge of the patch that extends above the patch:
% new figure with same patch, for demonstration purposes:
figure();
handles.axes1 = gca();
handles.region1 = patch( ...
'Parent',handles.axes1, ...
'XData',[5 5 20 10], ...
'YData',[0 10 15 0], ...
'FaceColor','red');
% a line showing p_x and p_y
line(p_x,p_y,'Color','y','LineWidth',3)
So the patch will turn green only when the cursor is exactly on that yellow line (which may never actually happen, in fact).
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