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Merge pull request#13235 from anntzer/vectorize-zalpha

Vectorize mplot3d.art3d.zalpha.

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Lines changed: 6 additions & 6 deletions

Original file line number	Diff line number	Diff line change
`@@ -790,9 +790,9 @@ def zalpha(colors, zs):`
`790`	`790`	`# in all three dimensions. Otherwise, at certain orientations,`
`791`	`791`	`# the min and max zs are very close together.`
`792`	`792`	`# Should really normalize against the viewing depth.`
`793`		`-colors=get_colors(colors,len(zs))`
`794`		`-iflen(zs):`
`795`		`-norm=Normalize(min(zs),max(zs))`
`796`		`-sats=1-norm(zs)*0.7`
`797`		`-colors= [(c[0],c[1],c[2],c[3]*s)forc,sinzip(colors,sats)]`
`798`		`-returncolors`
	`793`	`+iflen(zs)==0:`
	`794`	`+returnnp.zeros((0,4))`
	`795`	`+norm=Normalize(min(zs),max(zs))`
	`796`	`+sats=1-norm(zs)*0.7`
	`797`	`+rgba=np.broadcast_to(mcolors.to_rgba_array(colors), (len(zs),4))`
	`798`	`+returnnp.column_stack([rgba[:, :3],rgba[:,3]*sats])`

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