Checking for collisions

Module(s): 3D Modeling + Bridge and Civil Engineering

You can use the Collision Check tool to check whether selected 3D objects, architectural objects, SmartParts, smart symbols, fixtures and/or bar reinforcement collide. The collisions found are highlighted.

To check whether elements collide

1. Click Collision Check (How).
   

   Activate Collision Check in one of the following ways

   • Menu bar: Change Bonus Tools 3D Modeling

   • Palette: Tools Change area in the following module(s):

   3D Modeling

   Bridge and Civil Engineering

2. Select the elements you want to check for collisions.
   

   • To select a single element, click it.
   • To select elements in a region, use the left mouse button to open a selection rectangle around the elements you want to select
   • To include all the elements in the current document, click All in the Input options or press CTRL+A. Please note that this option is not available for all tools.

   For more information on the options available for selecting elements in Allplan, see Selecting elements, overview.

   When selecting elements, you can use the Filter Assistant to apply a filter based on element types and/or properties. For more information, see Filter Assistant.

   The Filter Assistant helps you select specific elements.

   A message appears informing you of the number of collisions found. When you confirm this message, the collisions are displayed as temporary boxes in the selection color in plan, isometric view and animation. The pen thickness set is used. If Color stands for pen is switched on, pen 6 is used for the boxes.
   Associative views and sections only display the collisions of bar reinforcement. Bars that collide are marked with a cross.

   

   Color stands for pen means that the color used to display an element on screen is associated with (and thus dependent on) the pen thickness of the element in question. Elements drawn with a certain pen (or pen thickness) are always presented on-screen with the same color, regardless of the colors assigned to the individual elements. You can specify which color represents which pen in the Options (Standard toolbar) on the Desktop environment - Pen colors page. You can switch the Color stands for pen option on and off in Show/Hide on the Standard toolbar.

3. Select more elements or press ESC to quit the tool.
4. Specify whether you want to save the collisions marked in the current document. This is useful if the collisions are to be edited later.
5. If necessary, delete the markings, which were created as an entity group.
   Correcting the collisions does not delete them automatically.
   

   An entity group is a group of elements which can be addressed as a whole. Polylines constructed in one step, for example, or symbols are entity groups. A group can be addressed as a whole by clicking one of the elements in the group with the middle and then left mouse button. Alternatively, press and hold down the SHIFT key and then click the element with the left mouse button. Elements can be combined into an entity group even while being created (with the Assign Group Number tool) or later (with the Modify Format Properties tool).

Notes:

• Mesh placements and digital terrain models are not included in collision checks.
• The program does not check whether bar reinforcement collides with 3D objects or architectural objects, which usually make up the formwork.
• The factor for the diameter, which you can specify for the representation of bar reinforcement in the Options, is taken into account.