MATLAB Creating Graphical User Interfaces

Animation with Slider Controls in GUIDE

Uipanel

Axes

rotate

xform

globe

surface

graticule

surface

Light

tilt

xform

Inserted

objects

HG Hierarchy for the Example

The tilt transform applies a rotation about the x-axis of 0.5091 radians (equal to 23.44
degrees, the inclination of the Earth's axis of rotation). The rotate transform initially has
a default identity matrix. The spinstopbutton_Callback subsequently updates the
matrix to rotate about the z-axis by 0.01745329252 radians (1 degree) per iteration, using
the following code:

az = az + 0.01745329252;
set(hgrotate,'Matrix',makehgtform('zrotate',az));
drawnow % Refresh the screen

Light the Globe and Shift the Light Source

A light object illuminates the globe, initially from the left. Two sliders control the
light's position, which you can manipulate whether the globe is standing still or rotating.
The light is a child of the axes, so is not affected by either of the hgtransforms. The call
to light uses no parameters other than its altitude and an azimuth:

hlight = camlight(0,0);

After creating the light, the axes1_CreateFcn adds some handles and data that other
callbacks need to the handles structure: