MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál stáhnout pdf (Strana 324)

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9 Examples of GUIDE UIs

9-78

handles.light = hlight;

handles.tform = hgrotate;

handles.hmesh = hmesh;

handles.azimuth = 0.;

handles.cmap = cmap;

guidata(gcf,handles);

The call to guidata caches the data added to handles.

Moving either of the sliders sets both the elevation and the azimuth of the light source,

although each slider changes only one. The code in the callback for varying the elevation

of the light is

function sunelslider_Callback(hObject, eventdata, handles)

hlight = handles.light; % Get handle to light object

sunaz = get(handles.sunazslider,'value'); % Get current light azimuth

sunel = get(hObject,'value'); % Varies from -72.8 -> 72.8 deg

lightangle(hlight,sunaz,sunel) % Set the new light angle

The callback for the light azimuth slider works similarly, querying the elevation slider's

setting to keep that value from being changed in the call to lightangle.

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