Matrix4x4

struct in UnityEngine

Descripción

Una matriz de transformación 4x4 estándar.

A transformation matrix can perform arbitrary linear 3D transformations (i.e. translation, rotation, scale, shear etc.) and perspective transformations using homogenous coordinates. You rarely use matrices in scripts; most often using Vector3s, Quaternions and functionality of Transform class is more straightforward. Plain matrices are used in special cases like setting up nonstandard camera projection.

In Unity, several Transform, Camera, Material, Graphics and GL functions use Matrix4x4.

Matrices in Unity are column major; i.e. the position of a transformation matrix is in the last column, and the first three columns contain x, y, and z-axes. Data is accessed as: row + (column*4). Matrices can be indexed like 2D arrays but note that in an expression like mat[a, b], a refers to the row index, while b refers to the column index.

using UnityEngine;

public class ExampleScript : MonoBehaviour
{
    void Start()
    {
        // get matrix from the Transform
        var matrix = transform.localToWorldMatrix;
        // get position from the last column
        var position = new Vector3(matrix[0,3], matrix[1,3], matrix[2,3]);
        Debug.Log("Transform position from matrix is: " + position);
    }
}

Variables Estáticas

identity	Retorna la matriz de identidad (Lectura solamente).
zero	Retorna una matriz con todos los elementos definidos a cero (Lectura solamente).

Variables

decomposeProjection	This property takes a projection matrix and returns the six plane coordinates that define a projection frustum.
determinant	The determinant of the matrix. (Read Only)
inverse	The inverse of this matrix. (Read Only)
isIdentity	Checks whether this is an identity matrix. (Read Only)
lossyScale	Attempts to get a scale value from the matrix. (Read Only)
rotation	Attempts to get a rotation quaternion from this matrix.
this[int,int]	Acceder al elemento en [fila, columna].
transpose	Retorna la transpuesta de esta matriz (Lectura Solamente).

Funciones Públicas

GetColumn	Obtiene la columna de la matriz.
GetRow	Devuelve una fila de la matriz.
MultiplyPoint	Transforma una posición por esta matriz (genérico).
MultiplyPoint3x4	Transforma una posición por esta matriz (rápido).
MultiplyVector	Transforma una dirección por esta matriz.
SetColumn	Define una columna de la matriz.
SetRow	Define una fila de la matriz.
SetTRS	Define esta matriz a una matriz de traslación, rotación y de escala.
ToString	Returns a formatted string for this matrix.
TransformPlane	Returns a plane that is transformed in space.
ValidTRS	Checks if this matrix is a valid transform matrix.

Funciones Estáticas

Frustum	This function returns a projection matrix with viewing frustum that has a near plane defined by the coordinates that were passed in.
Inverse3DAffine	Computes the inverse of a 3D affine matrix.
LookAt	Create a "look at" matrix.
Ortho	Create an orthogonal projection matrix.
Perspective	Create a perspective projection matrix.
Rotate	Creates a rotation matrix.
Scale	Crea una matriz de escalamiento.
Translate	Creates a translation matrix.
TRS	Crea una matriz de translación, rotación y escala.

Operadores

operator *

Multiplica dos matrices.

Scripting API