Texture2DImage construction examples¶

Example 1: Create a Surface resource and add a Texture2DImage

sfc = steno3d.core.Surface;
sfc.Mesh = {'H1', ones(10, 1), 'H2', ones(10, 1)};
tex = steno3d.core.Texture2DImage;
tex.U = [10 0 0];
tex.V = [0 10 0];
pngFile = [tempname '.png'];
imwrite(imread('ngc6543a.jpg'), pngFile, 'png');
tex.Image = pngFile;
sfc.Textures = tex;
example1 = steno3d.core.Project(                             ...
    'Title', 'Textures: Example 1',                          ...
    'Resources', sfc                                         ...
);
clear sfc tex pngFile;

Example 2: Create a Point resource and add multiple textures

pts = steno3d.core.Point(                                    ...
    'Mesh', {'Vertices', rand(1000, 3)}                      ...
);
pts.Textures = steno3d.core.Texture2DImage(                  ...
    'U', 'X',                                                ...
    'V', 'Z',                                                ...
    'Image', 'ngc6543a.jpg'                                  ...
);
pts.Textures{end+1} = steno3d.core.Texture2DImage(           ...
    'O', [.25 .25 .25],                                      ...
    'U', [.4 0 -.3],                                         ...
    'V', [.1 .2 .5],                                         ...
    'Image', 'ngc6543a.jpg'                                  ...
);
example2 = steno3d.core.Project(                             ...
    'Title', 'Textures: Example 2',                          ...
    'Resources', pts                                         ...
);
clear pts;

Example 3: Add a texture to a sphere to make it look like Earth

Note

The Texture2DImage constructor is called implicitly when constructing sfc by providing a cell array of input parameters.

fig = figure; [x, y, z] = sphere; surf(x, y, z);
h = findobj('Type', 'surface');
load earth; hemisphere = [ones(257,125),X,ones(257,125)];
set(h,'CData',flipud(hemisphere),'FaceColor','texturemap');
colormap(map); axis equal; view([90 0]);
fig.Position = [fig.Position(1:3) fig.Position(3)];
ax = gca; ax.Position = [0 0 1 1];
pngFile = [tempname '.png'];
print(fig, '-dpng', pngFile);
close(fig);
clear map X h hemisphere fig ax;
sfc = steno3d.core.Surface(                                  ...
    'Title', 'Hemisphere',                                   ...
    'Mesh', {                                                ...
        'Triangles', convhull(x(:), y(:), z(:)),             ...
        'Vertices', [x(:) y(:) z(:)]                         ...
    },                                                       ...
    'Textures', {                                            ...
        'O', [-1 -1 -1],                                     ...
        'U', [2 0 0],                                        ...
        'V', [0 0 2],                                        ...
        'Image', pngFile                                     ...
    }                                                        ...
);
example3 = steno3d.core.Project(                             ...
    'Title', 'Textures: Example 3',                          ...
    'Resources', sfc                                         ...
);
clear sfc x y z pngFile;

You can run the above examples with:

steno3d.examples.core.texture

Then plot the projects with:

example1.plot(); % etc...