2.3.3.3 Object Collision

The Collision option enables you to define, detect, and view collisions of the objects currently displayed in the Graphic Viewer. This function activate and deactivate Collision Mode. Collisions are detected only when Collision Mode is on. You can activate the Collision Mode using one of the following:

• Select Tools > Collision > Collision Mode On/Off from the menu bar.
• Click the Collision Mode On/Off button on the toolbar.

Fast Collision

This option enables you to quickly create a collision set from selected objects. The collision set created with this option is a self set, which means that all the objects within the set are checked for collision against each other. Only one fast collision set may exist in a study. If you create another one, it replaces the previous fast collision set.

1. Select the objects to be set for fast collision.
2. Activate Fast Collision mode using one of the following steps:
   • Select Tools > Collision > Fast Collision from the menu bar,
   • Click the Fast Collision button on the toolbar.

Figure: Fast Collision

If the objects collides with each other, the color will change to red. After setting the objects for fast collision, you can analyze the collision using the Collision Viewer.

1. Select View > Viewers > Collision Viewer from the menu bar.
2. The Collision Viewer opens and displays the objects in the fast collision set.
3. You can click the Collision Depth button to analyze the collision between two objects.
4. The Collision Depth window opens displaying the objects in collision and the penetration depth. The value of the penetration depth is also shown in the Graphic Viewer.
5. By selecting Jump, the selected object moves automatically according to the distance to jump, so that it does not collide with the other object anymore.

Figure: Collision Depth Analysis from Collision Viewer

If you need to arrange two objects right next to each other, the Fast Collision option also allows a quick way to put two objects together next to each other.

1. Activate Fast Collision mode for the selected objects.
2. After you set the two objects as fast collision pair, select the object to be moved.
3. Open the Placement Manipulator window and click Move to Collision button in the direction, in which the object should be aligned to.
4. The object will move until it reaches the collision point of the other object.

Figure: Placement Manipulator using Fast Collision