Simulating Curtain Movement Caused by wind Using Reactor (Cloth and Wind) ByAziz| 3D Studio Max | Intermediate Reactor is a plug-in for 3DS Max that allows animators and artists to easily control and simulate complex physical scenes. Reactor fully supports integrated rigid and soft body dynamics, cloth simulation and fluid simulation. It can also simulate physical behaviours such as wind, wheelsandmotors. You can use all of these features to create rich dynamic environments. This tutorial will teach you how to simulate the movement of cloth using the cloth Reactor and the wind Reactor. We are going to implement the usage of these two Reactors by simulating wind blowing at a cloth curtain. You are required to have basic knowledge in how to use 3DS Max. Start off by creating a new scene in 3DS Max. In order to make the curtain, we should create a wall with a window in it. To create the wall go throughCreate>Geometry>Standard Primitives>Box and then use the settings shown in the image below for the dimensions of the box.
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Simulating Curtain Movement Caused by Wind Using Reactor
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8/3/2019 Simulating Curtain Movement Caused by Wind Using Reactor
Repeat the process above to create another box that should this time resemble our window
hole. It should obviously be smaller than the wall, you can use dimensions used in the imagebelow. Move the box so that it faces the middle of the wall.
We are going to subtract the small box from the wall to create the hole. Access the Create
Panel again and select Compound Objects from the drop down menu as illustrated in the first
image below. You will then have choose Boolean from the Compound Objects section.
8/3/2019 Simulating Curtain Movement Caused by Wind Using Reactor
While you're still at the Compound Objects section, go to the the Pick Boolean section and
select Pick Operand B and then click on the small box that we have in the scene. This should
make our box disappear leaving a whole in the wall behind it.
I created glass windows and a hanger for the curtains. You do not need to create the glass
windows as those were made to add more details to the model and that goes beyond the scope
of this tutorial. You will however need to create the curtain hanger, to do this you will have to
follow the earlier steps to create a box and then replace its dimensions with the ones displayedin the image below. You will have to place the hanger above the window hole as illustrated in
the image as well.
8/3/2019 Simulating Curtain Movement Caused by Wind Using Reactor
It is time to add the Reactor Cloth Modifier to the curtain plane. Select the curtain plane and
then access the Modifier Panel and pick Reactor Cloth from the drop down menu as illustrated
in the image below. Access the Reactor cloth modifier panel and assign a Mass value to the
curtain. I used the value 80 kg, I know that it is a really heavy curtain, but we are using a highvalue for the cloth to avoid adding gravity to our scene to be able to experiment with higher wind
values as well. Make sure that you activate theAvoid Self-Intersections as illustrated in the
image below.
8/3/2019 Simulating Curtain Movement Caused by Wind Using Reactor
We are now done working with the curtain. Exit the vertex mode by clicking on Reactor Cloth in
the Modifier Panel. Now select the curtain as a whole by clicking once on the curtain on thescene. Access the Reactor Panel to click on the Create Cloth Collection button. You will now be
required to add the curtains to the Cloth Collection using the same method we used above to
add the wall and the curtain hangers to the RB collection.
The Cloth Collection is a Reactor helper object that acts as a container for cloth objects.
We need to create wind to blow at our curtains. Access the Reactor Panel and click on
the Create Wind button . Using the left viewport, position the wind Reactor so that it faces
the vertical center of our window so that the wind blows directly at the window.
8/3/2019 Simulating Curtain Movement Caused by Wind Using Reactor