The inverse of this matrix (Read Only).
Inverted matrix is such that if multiplied by the original would result in identity matrix.
If some matrix transforms vectors in a particular way, then the inverse matrix can transform them back. For example, Transform's worldToLocalMatrix and localToWorldMatrix are inverses of each other.
// Stretch a mesh at an arbitrary angle around the X axis.
// Angle and amount of stretching.
var rotAngle: float;
var stretch: float;
private var mf: MeshFilter;
private var origVerts: Vector3[];
private var newVerts: Vector3[];
function Start () {
// Get the Mesh Filter component, save its original vertices
// and make a new vertex array for processing.
mf = GetComponent.<MeshFilter>();
origVerts = mf.mesh.vertices;
newVerts = new Vector3[origVerts.Length];
}
function Update () {
// Create a rotation matrix from a Quaternion.
var rot = Quaternion.Euler(rotAngle, 0, 0);
var m = Matrix4x4.TRS(Vector3.zero, rot, Vector3.one);
// Get the inverse of the matrix (ie, to undo the rotation).
var inv = m.inverse;
// For each vertex...
for (var i = 0; i < origVerts.Length; i++) {
// Rotate the vertex and scale it along its new Y axis.
var pt = m.MultiplyPoint3x4(origVerts[i]);
pt.y *= stretch;
// Return the vertex to its original rotation (but with the
// scaling still applied).
newVerts[i] = inv.MultiplyPoint3x4(pt);
}
// Copy the transformed vertices back to the mesh.
mf.mesh.vertices = newVerts;
}