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Preserve Modifier 759
3.
Use the Modify panel to select the top
four vertices in the second box. Move them
upward in Z, making the copied box taller than
the original.
4. Apply Preserve, and pick the first box as the
original.
The selected vertices move dow n to match the
original edge lengths.
5. Set Iterat ions to 0 to move the vertices back up,
then turn on Invert Selection, and set iterations
back up to 25.
The selected vertices stay in their or iginal
locations, but the unselected vertices move
upward to restore the original edge lengths.
6. Tur n Ite r at ions ba ck dow n to 0 .TurnonApply
To Whole Mesh (Invert Selection b ecomes
unavailable), and then turn Iterat ions back up
to 25.
Preserve is now applied to the whole mesh.
Sinceallverticesareaffected,thetopand
bottom of the box approach each other.
7. Tur n of f Appl y To Whole Mesh .
All ver t ices are translated, but maintain the
same posit ions relative to each other.
8. Turn off Invert Selection and turn on Selected
Ve r t s On l y.
You’re back to the ori ginal effect. You can move
the Iterations spinner up and down to see that
you ’re affecting only the selected vertices.
Ex ample: Simula ting cloth:
1.
Reset the program , create a Quad Patch Grid,
and convert it to an editable mesh.
2. Makeacopy,andthenmakeareferenceofthe
copy.
You should have a total of three objects in the
scene.
3. Apply Preserve to the third p atch, using the
first as the original.
4. Select Selected Ver ts Only and Invert Selection.
5. Set Iterations to 100.
6. Selectthesecondpatchandgotothe
Sub-Object > Vertex level.
7. Select a single vertex in the middle of the patch
andmoveitupwardinZ.
The third p atch becomes a floating
handkerchief.
8. Undo the vertex move.
9. Selec t the far two corner ver tices of the second
patch, and drag them upward in Z.
Now, you’ve got the beginnings of a sheet
hanging on the line.
Interf ace
Original—Displaysthenameoftheselected
original object. (Note that the s o-ca lled "original"
object doesn’t actually have to be the original.
It’s simply a copy of the object that represents its
unmodified topology.)