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Feature Request: non-square axes in axes3D #8593

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huangziwei opened this issue May 8, 2017 · 2 comments
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Feature Request: non-square axes in axes3D #8593

huangziwei opened this issue May 8, 2017 · 2 comments
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New feature topic: mplot3d

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@huangziwei
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Currently, we can get non-square axes in axes3D based on a simple hack from http://stackoverflow.com/a/10328142/2135095, by editing the get_proj function inside site-packages\mpl_toolkits\mplot3d\axes3d.py:

def get_proj(self):

    relev, razim = np.pi * self.elev/180, np.pi * self.azim/180

    try:
        self.localPbAspect = self.pbaspect
    except AttributeError:
        self.localPbAspect = [1,1,1]
    
    xmin, xmax = self.get_xlim3d() / self.localPbAspect[0]
    ymin, ymax = self.get_ylim3d() / self.localPbAspect[1]
    zmin, zmax = self.get_zlim3d() / self.localPbAspect[2]

then in the code we can set the axes manually:

fig = plt.figure()
ax = fig.gca(projection='3d')
ax.pbaspect = [1,1,0.5]

it would be great if we can have some generic solution to achieve non-square axes.
@eric-wieser eric-wieser mentioned this issue Jul 16, 2017
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@dstansby dstansby added this to the 2.2 (next next feature release) milestone Aug 29, 2017
@baloe
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baloe commented Jul 1, 2019 •
edited
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The hack above doesn't seem to work any more:

    xmin, xmax = self.get_xlim3d() / self.localPbAspect[0]
TypeError: unsupported operand type(s) for /: 'tuple' and 'int'

So I modified get_proj in the following way:

        relev, razim = np.pi * self.elev/180, np.pi * self.azim/180

        try:
            self.localPbAspect = self.pbaspect
        except AttributeError:
            self.localPbAspect = [1,1,1]

        xmin, xmax = ( lim / self.localPbAspect[0] for lim in self.get_xlim3d() )
        ymin, ymax = ( lim / self.localPbAspect[1] for lim in self.get_ylim3d() )
        zmin, zmax = ( lim / self.localPbAspect[2] for lim in self.get_zlim3d() )

        # transform to uniform world coordinates 0-1.0,0-1.0,0-1.0
        worldM = proj3d.world_transformation(xmin, xmax,
                                             ymin, ymax,
                                             zmin, zmax)

This produces the desired output.

@story645 story645 removed this from the future releases milestone Oct 6, 2022
@pmolodo
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pmolodo commented Oct 22, 2024

For future searchers:

The way to set this now is via Axes3D.set_box_aspect([x, y, z])

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@pmolodo @story645 @huangziwei @dstansby @baloe