Matakuliah
Tahun
: UO714 / Technology for Animation
: 2009
Cloth Simulation
Pertemuan 07
Overview
Cloth provides you with advanced tools for creating realistic fabrics and tailor-made clothing for characters and creatures. The Cloth
system comprises two modifiers:
The Cloth modifier is responsible for simulating the motion of cloth as it interacts with the environment, which may include collision
objects (a character or a table, for example) and external forces, such as gravity and wind.
The Garment Maker modifier is a specialized tool for creating 3D garments from 2D splines, similarly to the way real clothes are
made, by stitching together flat pieces of cloth.
You can model clothing in two ways: by creating the cloth objects with standard 3ds Max modeling methods and applying the Cloth
modifier to them, or by designing virtual clothing patterns with splines and stitching together these various virtual panels to
form a full garment using the Garment Maker modifier. With Garment Maker, you can even import spline patterns from
external applications and use these as your pattern panels.
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Garment Maker Modifier
Garment Maker is a modifier that is designed to put together 2D patterns
that you can then use with Cloth. With Garment Maker you can take a
simple, flat, spline-based pattern and convert it to a mesh, arrange its
panels, and create seams to sew the panels together. You can also
specify internal seam lines for creases and cuts.
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Cloth Modifier
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The Cloth modifier is the heart of the Cloth system, and is applied to
all objects in your scene that need to be part of the Cloth simulation.
This is where you define cloth and collision objects, assign
properties, and execute the simulation. Other controls include
creating constraints, interactively dragging the cloth, and erasing
parts of the simulation.
Cloth Pattern Design Overview
Traditionally, sewing patterns are cut from flat pieces of cloth and
stitched together. The place where one piece of cloth is sewn to
another is called a seam. Patterns are generally symmetrical, where
the left side of the garment matches the right.
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Shirt Pattern
A shirt pattern is slightly more complicated. A simple T-shirt
pattern is made of two pieces, one for the front and another
for the back. The collar on the back piece is higher than the
collar on the front. You sew seams up the sides and at the
shoulders, leaving the arm hole open.
You can also add sleeves to
the shirt. A sleeve pattern is
bell-shaped.
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Pants Pattern
A pants pattern has a curved shape at the
top to accommodate the hips. The longer
straight edge is the outside seam, while the
shorter edge is the inseam. The curve near
the top fits around the belly or buttocks,
and under the crotch area.
Each piece is cut twice. The two front
pieces are sewn together along the
crotch, and the two back pieces are sewn
together in the same way. Then the front
is attached to the back at the outside
seams and inseams.
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Dart Pattern
Darts are diamond-shaped holes inside a panel or V-shaped cutouts at an edge of a garment panel
(see figure below), which when closed up cause the garment to assume a curved shape.
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