MATLAB Function Reference Volume 1: A - E - Bad Request

3. Add the Slice Planes
coneplot
• Calculate the magnitude of the vector field (which represents wind speed) to
generate scalar data for the slice command.
• Create slice planes along the x-axis at xmin and xmax, along the y-axis at
ymax, and along the z-axis at zmin.
• Specify interpolated face color so the slice coloring indicates wind speed and
do not draw edges (hold, slice, FaceColor, EdgeColor).
hold on
wind_speed = sqrt(u.^2 + v.^2 + w.^2);
hsurfaces = slice(x,y,z,wind_speed,[xmin,xmax],ymax,zmin);
set(hsurfaces,'FaceColor','interp','EdgeColor','none')
hold off
4. Define the View
• Use the axis command to set the axis limits equal to the range of the data.
• Orient the view to azimuth = 30 and elevation = 40 (rotate3d is a useful
command for selecting the best view).
• Select perspective projection to provide a more realistic looking volume
(camproj).
• Zoom in on the scene a little to make the plot as large as possible (camzoom).
axis tight; view(30,40); axis off
camproj perspective; camzoom(1.5)
5. Add Lighting to the Scene
The light source affects both the slice planes (surfaces) and the cone plots
(patches). However, you can set the lighting characteristics of each
independently.
• Add a light source to the right of the camera and use Phong lighting give the
cones and slice planes a smooth, three-dimensional appearance (camlight,
lighting).
• Increase the value of the AmbientStrength property for each slice plane to
improve the visibility of the dark blue colors. (Note that you can also specify
a different colormap to change to coloring of the slice planes.)
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