![]() I have adjusted the Friction setting, so the cloth doesn't slide off so quickly, but this can be good if you want to simulate a material like silk. This animation shows a cloth draping over two spheres. This causing the cloth not to go through the sphere.Īs I mentioned above, you can increase the amount of polygons in your cloth, this will make your cloth animate smoother and look more realistic. So for instance, as the cloth goes thought the sphere, by increasing the Push Length to say 0.2, the cloth now collides 0.2 units above the sphere. This controls the offset between the cloth and the sphere's surface. For a fast result, you can change a parameter called Push Length. These techniques are sometimes very good for some circumstances, but take longer to calculate. So if the cloth went through the sphere, it would try and recalculate and move the cloth back on top of the sphere. ![]() Another is to increase iterations per frame, this number determines how many times the collision is checked per frame. One is to increase the number of polygons in the grid and sphere, so the simulation has more points to calculate and is more accurate. There are a number of different ways to try and solve this. However, you will notice that you see the sphere through the cloth. Now play the animation again, and you will see the cloth land on the sphere and the cloth will deform into a spherical like shape. Under Range change the end frame number so the cloth simulation will last longer. To do this, select the cloth, and go to Select and click on ClothOp, this will bring the cloth settings dialogue box up again. You may have to make your cloth simulation run longer as the default time is 100 frames. Before we try to fine tune the cloth, first play the animation and see how the cloth-sphere collision works. This window displays the parameters for the cloth-sphere collision. The cloth is now setup to collide with the sphere. Select the cloth and go to Modify->Environment->Set Obstacle. If you now click play, you will see the cloth fall under gravity. Select your grid/cloth and then Modify->Environment->Apply Force and select the Gravity icon (right click to end picking). As cloth never moves on its own (in the real world that is), it is usually affected by some external force, wind, gravity, collision etc. A dialogue box pops up, you can ignore that for now, we will cover that later. With the grid still selected, go to the Simulate menu (press 4 on keyboard) and then to Create->Cloth->From Selection. First we need to create the cloth, this will be a simple grid plane. To start with will create a basic grid that will fall under gravity and interact with a basic object - a sphere. We will cover various types of cloth from curtains and table cloths to more advance cloth setup such as clothes. But this tutorial will show you that you can actually achieve realistic results. SoftImage XSI has gotten a bit of a bad reputation that it's cloth simulation isn't very good. This tutorial will demonstrate how to use the cloth simulation in XSI 3.0.
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