Morph submobject families and add fill_mode subpath balancing - #6
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Polymorph previously rejected any mobject whose points live in submobjects, which ruled out Text, Tex, VGroups, and SVG imports. Since polymorph aligns arbitrary numbers of subpaths natively, flatten each keyframe's family into one multi-subpath path instead: - collect subpaths per family member in draw order, so boundaries stay exact even when one member's path ends where the next begins - collapse the animated mobject to a single flat VMobject during the morph, styled after its first drawn family member; style crossfade interpolates between those representative members rather than the (styleless) parents - restore the target's full submobject structure on finish with snap_to_target, so Text/Tex targets end as real glyphs Flattened text exposes how subpath-count mismatches are filled: with polymorph's origin-point padding, four letters of a five-letter word grow from nothing while only one morphs from the source shape. Add a fill_mode option to control this. The new default, share, clones the smaller keyframe's subpaths (cycling largest-perimeter first) so every subpath morphs from and to real geometry — one shape splits into every glyph of a word, and every glyph merges back into one shape. The previous behavior remains as fill_mode=grow, used explicitly by the demo's origin-growth showcase. Per-submobject styling collapses to one style mid-morph; documented in the README limitations.
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Aug 2, 2026
Morph submobject families and add fill_mode subpath balancing
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Polymorph previously rejected any mobject whose points live in submobjects, which ruled out Text, Tex, VGroups, and SVG imports. Since polymorph aligns arbitrary numbers of subpaths natively, flatten each keyframe's family into one multi-subpath path instead:
Flattened text exposes how subpath-count mismatches are filled: with polymorph's origin-point padding, four letters of a five-letter word grow from nothing while only one morphs from the source shape. Add a fill_mode option to control this. The new default, share, clones the smaller keyframe's subpaths (cycling largest-perimeter first) so every subpath morphs from and to real geometry — one shape splits into every glyph of a word, and every glyph merges back into one shape. The previous behavior remains as fill_mode=grow, used explicitly by the demo's origin-growth showcase.
Per-submobject styling collapses to one style mid-morph; documented in the README limitations.