Homography::then_after returned products whose entries could overflow to
infinity or become NaN. A move, transform or grid reproject of type or a
symbol instance whose stored projection has large finite entries stored such
a product, and the type was then drawn flat, since a projection that is not
finite reads as none.
- Homography::checked_then_after returns None when an entry of the product
is not finite.
- project_node composes each type and symbol instance projection with it and
returns false, leaving the object as it is, when one would not be finite;
moves and transforms in perspective and Define Perspective Grid with
reproject then return the horizon error and leave the document unchanged.
- transform_map, attach_homography and size_homography return None for such
a product.
- Edit Text returns the horizon error, and does not enter isolation mode,
when the type cannot be shown flat where it is drawn.
Enter Isolation Mode worked while an opacity mask was edited, and Edit
Opacity Mask and View Opacity Mask worked in isolation mode, so each
mode replaced the other's isolated art. In the reference app, isolation
mode can't be entered while a mask is edited, and mask editing can't be
entered in isolation mode.
object.isolate and perspective.editText, which shows type in isolation
mode, are now off while an opacity mask is edited, and a call returns
an error that ends "stop editing the opacity mask first". In isolation
mode transparency.editOpacityMask and transparency.viewOpacityMask are
off, and transparency.makeOpacityMask refuses one target, an object or
a layer, which it would take into mask editing; a call returns an error
that ends "exit isolation mode first". Make Opacity Mask with two
objects still masks one with the other. Pattern editing mode does not
count as isolation mode for these commands.
Object > Perspective > Edit Text, the canvas context menu and the
Transparency panel's menu and Make Mask button follow the commands'
enablement. A click or Alt-click on the mask thumbnail in isolation
mode shows the error and does not edit the mask. While a mask is
edited, the Contextual Task Bar leaves out Isolate, and the Properties
panel's Quick Actions leave out Isolate Group.
Docs: docs/mcp.md, docs/target-app-parity.md.
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