public void nearestPointOnPlane_is_projectedVertex()
{
Debug.Log(" === known plane-projected vertex test === ");
// test point @ origin
Vector3 p = new Vector3(0, 0, 0);
// test mesh is 1x1 plane at z = 1
GameObject plane = new GameObject("testPlane");
MeshFilter mf = (MeshFilter)plane.AddComponent(typeof(MeshFilter));
Vector3[] pl = new Vector3[] { new Vector3(1, 1, 1),
new Vector3(1, -1, 1),
new Vector3(-1, 1, 1),
new Vector3(-1, -1, 1) };
mf.mesh = CreateMesh(pl);
Vector3 projection = new Vector3(0, 0, 1);
Vector3 result = NearestPointOnMesh.getNearestPointOnMesh(p, mf);
UUnitAssert.Equals(projection, result);
}
public void nearestPointOnPrimitivePlane_is_projectedVertex()
{
Debug.Log(" === known PrimitiveType.Plane-projected vertex test === ");
// test point @ origin
Vector3 p = new Vector3(1, 1, 1);
// test mesh is 1x1 plane at z = 1
//GameObject pl = new GameObject("testPlane");
GameObject pl = GameObject.CreatePrimitive(PrimitiveType.Plane);
MeshFilter mf = pl.GetComponent <MeshFilter>();
Vector3 projection = new Vector3(1, 0, 1);
Vector3 result = NearestPointOnMesh.getNearestPointOnMesh(p, mf);
UUnitAssert.Equals(projection, result);
}
public static Vector3 lerpNearest(Vector3 from, MeshFilter to, float t)
{
//Linearly interpolates between given point and nearest point on mesh by fraction t
Mesh mesh = to.mesh;
VertTriList vt = new VertTriList(mesh);
Vector3 objSpacePt = from; // to.transform.InverseTransformPoint(from);
Vector3[] verts = mesh.vertices;
KDTree kd = KDTree.MakeFromPoints(verts);
Vector3 meshPt = NearestPointOnMesh.getNearestPointOnMesh(objSpacePt, verts, kd, mesh.triangles, vt);
Vector3 closest = meshPt; //= to.transform.TransformPoint(meshPt);
Debug.Log("selected:" + from.ToString() + " nearest:" + closest.ToString());
Vector3 towards = Vector3.Lerp(from, closest, t);
Debug.Log("lerp point" + towards.ToString());
return(towards);
}
public void nearestPointOnScaledCube_is_scaled()
{
// ensures that a point at 1,0,0 moves to a point at .5,0,0 if cube at origin w/ scale .5,.5,.5
Debug.Log(" === scaled cube test === ");
Vector3 p = new Vector3(1, 2, 2);
GameObject cu = GameObject.CreatePrimitive(PrimitiveType.Cube);
cu.transform.localScale = new Vector3(0.5f, 2f, 2f);
MeshFilter mf = cu.GetComponent <MeshFilter>();
Vector3 expected = new Vector3(.5f, 2f, 2f);
Vector3 result = NearestPointOnMesh.getNearestPointOnMesh(p, mf);
Debug.Log(expected.ToString() + "=?=" + result.ToString());
UUnitAssert.Equals(expected, result);
}
