Knowledge Base

Article Number: 70 | VC4 | VC3 | Post Date: August 23, 2018 | Last Updated: August 23, 2018

I need to make a hot rod type vehicle with one end of the vehicle raised further off the ground than the other. How can I do this in Virtual CRASH?

This is easy to do in Virtual CRASH. First, set your vehicle’s yaw angle to 0 degrees, and then switch to the left side or right side orthographic view mode. Left-click on your vehicle, then enter Vertices selection mode. Lasso all the vertices. Then use the rotation grip to modify the pitch angle of the vehicle’s mesh as needed. This is illustrated in the video below.

There are a couple of things to note when adjusting the mesh orientation: First, modifying the mesh geometry does not change the vehicle model’s local x-axis orientation. The cg position and moments-of-inertia also do not change. You can of course modify the cg position and moments-of-inertia as needed for your case. If you want to change the vehicle’s x-axis orientation, though it is not advised for this application, you can simply go to the Pivot selection type and use the rotation grip to adjust its orientation. Second, as you rotate the vertices, you will notice some vertices will change positions to be closer to the ground plane. 

When you re-adjust your vehicle position, auto-align to plane will snap the vehicle back onto the ground plane such that the lowest vertex is a distance from the ground plane equal to the ground clearance input value. You may need to adjust the ground clearance value to account for the rotation of the vehicle’s mesh. 

Tags: Rotating mesh, hot rod, low rider, vehicle modification, vertex.

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