I have vehicles in my game that need to have their y rotation value adjust based on the terrain underneath them. When driving uphill, my units y rotation will be incorrect.
This is what I currently use to rotate my unit.
Quaternion rot = Quaternion.LookRotation(targetDir - unit.transform.position);
float rotateVelocity = Mathf.Min (3.0f * Time.deltaTime, 1);
unit.transform.rotation = Quaternion.Lerp(unit.transform.rotation, rot, rotateVelocity);
To visualize what I mean, here an image:
http://answers.unity3d.com/storage/temp/17661-exampleimg.png
What I effectively need to do, is to get the coordinates of the mesh of the terrain at the front of my unit, and the back, but how do I accomplish that?
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