Unity API Parsing (6)--matrix4x4 class

Typically used in non-standard projection transformations such as cameras

Multiplypoint Method--Projection matrix transformation

Projection matrix transformation on point V

It is mainly used for the projection transformation of camera, multiplypoint3x4 method for matrix transformation of general object, no projection transformation, and faster computation speed.

multiplypoint3x4--Matrix Transformation

Multiplyvector Method--matrix transformation

Matrix transformation of Direction vector v

using unityengine;using System.collections;public class Multiplyvector_ts:monobehaviour    {public Transform tr;    matrix4x4 mv0 = matrix4x4.identity;    matrix4x4 mv1 = matrix4x4.identity; void Start () {//sets the transform matrix Mv0 and mv1 the position transform and the angle transform are not 0 mv0 respectively.        Settrs (Vector3.one * 10.0f, Quaternion.euler (New Vector3 (0.0f, 30.0f, 0.0f)), Vector3.one); Mv1.    Settrs (Vector3.one * 10.0f, Quaternion.euler (New Vector3 (0.0f, 0.6f, 0.0f)), Vector3.one); } void Update () {//TR to locate the transformed vector tr.position = mv1.    Multiplyvector (tr.position); } void Ongui () {if (GUI. button (new Rect (10.0f, 10.0f, 120.0f, 45.0f), "Rotate direction 30 degrees")) {Vector3 v = mv0.            Multiplyvector (New Vector3 (10.0f, 0.0f, 0.0f));            After printing the rotated vector, its direction has been rotated Debug.Log ("transformed vector:" +v);        Prints the length of the rotated vector,//Although the position transform of the mv0 is not 0, the length of the transformed vector should be the same as before the transformation Debug.Log ("transformed vector modulus length:" + v.magnitude); }    }}

Settrs Method--Resetting the matrx4x4 transformation matrix

POS is the position vector, q is the rotation angle, and the parameter s is the scaling vector

Using unityengine;using system.collections;public class settrs_ts:monobehaviour{    Vector3 v1 = vector3.one;    Vector3 v2 = Vector3.zero;    void Start ()    {        matrix4x4 m1 = matrix4x4.identity;        Position adds 5 units along the Y axis, rotates 45 degrees around the y axis, and scales twice times        M1. Settrs (Vector3.up * 5, Quaternion.euler (Vector3.up * 45.0f), Vector3.one * 2.0f);        You can also use the following static method to set the M1 transform        //m1 = Matrix4x4.trs (Vector3.up * 5, Quaternion.euler (Vector3.up * 45.0f), Vector3.one * 2.0f); C10/>V2 = M1. multiplypoint3x4 (v1);        Debug.Log ("v1 value o" + v1);        Debug.Log ("V2 value O" + v2);    }    void Fixedupdate ()    {        debug.drawline (Vector3.zero, v1, color.green);        Debug.drawline (Vector3.zero, V2, color.red);}    }

ortho--creating an orthographic projection matrix

perspective--creating a Perspective projection matrix

Using unityengine;using system.collections;public class orthoandperspective_ts:monobehaviour{Matrix4x4 Perspective = matrix4x4.identity;//Perspective projection variable matrix4x4 ortho = matrix4x4.identity;//orthogonal projection variable//declaration variable, used to record the value of the orthogonal viewport left, right, bottom, float l, R,    B, t;        void Start () {//Set perspective projection Matrix perspective = matrix4x4.perspective (65.0f, 1.5f, 0.1f, 500.0f);        t = 10.0f;        b =-T;        To prevent the view from morphing you need to multiply Camera.main.aspect by L = b * Camera.main.aspect;        r = T * Camera.main.aspect;    Set the orthogonal projection matrix ortho = Matrix4x4.ortho (L, R, B, T, 0.1f, 100.0f); } void Ongui () {//using the default orthographic projection if (GUI.            button (new Rect (10.0f, 8.0f, 150.0f, 20.0f), "Reset Ortho")) {Camera.main.orthographic = true;            Camera.main.ResetProjectionMatrix ();        Camera.main.orthographicSize = 5.1f; }//Use the custom orthographic projection if (GUI. button (new Rect (10.0f, 38.0f, 150.0f, 20.0f), "use Ortho")) {Ortho = Matrix4x4.ortho (l, R, B, T, 0.1f, 100.0f);            Camera.main.orthographic = true;            Camera.main.ResetProjectionMatrix ();            Camera.main.projectionMatrix = ortho;        Camera.main.orthographicSize = 5.1f; }//Use a custom perspective to project if (GUI.            button (new Rect (10.0f, 68.0f, 150.0f, 20.0f), "use Perspective")) {Camera.main.orthographic = false;        Camera.main.projectionMatrix = perspective; }//Restore system default Perspective projection if (GUI.             button (new Rect (10.0f, 98.0f, 150.0f, 20.0f), "Reset Perspective")) {Camera.main.orthographic = false;        Camera.main.ResetProjectionMatrix (); }    }}

Unity API Parsing (6)--matrix4x4 class