Get face normal and get its local Euler Angles?

Questions & Answers
1

I have a simple script which checks using raycast and gets mesh face normals and what I want to do is to get it’s local rotation so i can make my object rotated alike… is that possible? Here’s the code I’m using to get face normals:

private var Target : Transform;
var Hit : RaycastHit;
var layerMask = 1<<8;
private var faceNormalZ : float = 0;
private var faceNormalX : float = 0;

function Start () {
	Target = GameObject.FindWithTag("Player").transform;
}

function Update (){
	transform.position = Target.position;
	transform.localEulerAngles.y = Target.localEulerAngles.y;
	transform.rotation.x = faceNormalX;
	transform.rotation.z = faceNormalZ;
	
	if (Physics.Raycast(transform.position, Vector3.down, Hit, 2, layerMask)){
	var meshCollider = Hit.collider as MeshCollider;}
		if (meshCollider == null || meshCollider.sharedMesh == null)
		return;
			
		var mesh : Mesh = meshCollider.sharedMesh;
		var vertices = mesh.vertices;
		var triangles = mesh.triangles;
		var normals = mesh.normals;
	
		P1 = vertices[triangles[Hit.triangleIndex * 3]];
		P2 = vertices[triangles[Hit.triangleIndex * 3 + 1]];
		P3 = vertices[triangles[Hit.triangleIndex * 3 + 2]];
			center = ((P1 + P2 + P3) / 3);

		P1 = normals[triangles[Hit.triangleIndex * 3]];
		P2 = normals[triangles[Hit.triangleIndex * 3 + 1]];
		P3 = normals[triangles[Hit.triangleIndex * 3 + 2]];
			faceNormal = ((P1 + P2 + P3) / 3);
			faceNormalZ = faceNormal.z;
			faceNormalX = -faceNormal.x;
}
2

You don’t have to dig in to the mesh for this, you can just use:

someObject.transform.position = Hit.position;
someObject.transform.up = Hit.normal;
3

(Theory) You can’t know the rotation of a vector, because it doesn’t make sense. It need to be relative to something. You might need confirmation of someone good in math, but I think there is an infinity of rotation from a vector to another, so I think you need 2 relative vectors.

Anyway, you probably want to use Quaternion.LookRotation.

4

Stop capping the first letter of vars!!! THAT IS THE PROBLEM HERE!!!

(shaking fist in air)