Class: ProjectionMatrix

一个表示 4*4 的矩阵 1--0--0--0 | | | | 0--1--0--0 | | | | 0--0--1--0 | | | | 0--0--0--1

const m = new Matrix4();

Hierarchy

• Matrix4

  ↳ ProjectionMatrix

Table of contents

Constructors

• constructor

Properties

• elements

Accessors

• x
• y
• z
• w
• identity

Methods

• fromArray
• toArray
• set
• transpose
• invert
• adjoint
• determinant
• add
• subtract
• multiply
• multiplyScalar
• premultiply
• translate
• rotate
• scale
• scaleScalar
• fromTranslation
• fromRotation
• fromRotationX
• fromRotationY
• fromRotationZ
• fromScale
• fromRotationTranslation
• fromPerspective
• fromOrthogonal
• fromQuat
• equals
• getRotation
• getScale
• getTranslation
• rotateX
• rotateY
• rotateZ
• compose
• decompose
• copy
• clone
• frustum
• orthographic
• perspective
• lookAt
• toString

Constructors

constructor

• new ProjectionMatrix(m00?, m01?, m02?, m03?, m10?, m11?, m12?, m13?, m20?, m21?, m22?, m23?, m30?, m31?, m32?, m33?): ProjectionMatrix

Parameters

Name	Type	Default value	Description
m00	number	1	第一行第一列，默认是 1
m01	number	0	第一行第二列，默认是 0
m02	number	0	第一行第三列，默认是 0
m03	number	0	第一行第四列，默认是 0
m10	number	0	第二行第一列，默认是 0
m11	number	1	第二行第二列，默认是 1
m12	number	0	第二行第三列，默认是 0
m13	number	0	第二行第四列，默认是 0
m20	number	0	第三行第一列，默认是 0
m21	number	0	第三行第二列，默认是 0
m22	number	1	第三行第三列，默认是 1
m23	number	0	第三行第四列，默认是 0
m30	number	0	第四行第一列，默认是 0
m31	number	0	第四行第二列，默认是 0
m32	number	0	第四行第三列，默认是 0
m33	number	1	第四行第四列，默认是 1

Returns

ProjectionMatrix

Inherited from

Matrix4.constructor

Defined in

src/math/Matrix4.ts:77

Properties

elements

• elements: Float32Array | Float64Array

Inherited from

Matrix4.elements

Defined in

src/math/Matrix4.ts:57

Accessors

x

• get x(): number

获取向量 x 值

Returns

number

number;

Inherited from

Matrix4.x

Defined in

src/math/Matrix4.ts:123

---

y

• get y(): number

获取向量 y 值

Returns

number

number;

Inherited from

Matrix4.y

Defined in

src/math/Matrix4.ts:131

---

z

• get z(): number

获取向量 z 值

Returns

number

number;

Inherited from

Matrix4.z

Defined in

src/math/Matrix4.ts:139

---

w

• get w(): number

获取向量 w 值

Returns

number

number;

Inherited from

Matrix4.w

Defined in

src/math/Matrix4.ts:147

---

identity

• get identity(): Matrix4

获取单位矩阵

Returns

Matrix4

Inherited from

Matrix4.identity

Defined in

src/math/Matrix4.ts:154

Methods

fromArray

▸ fromArray(array, offset?): ProjectionMatrix

从数组构建矩阵

Parameters

Name	Type	Default value	Description
array	any	undefined	原始数组
offset	number	0	数组偏移量

Returns

ProjectionMatrix

Inherited from

Matrix4.fromArray

Defined in

src/math/Matrix.ts:15

---

toArray

▸ toArray(out?, offset?): Float32Array | Float64Array | number[]

从矩阵转换到数组

Parameters

Name	Type	Default value	Description
out	Float32Array | Float64Array | number[]	[]	输出数据
offset	number	0	偏移量

Returns

Float32Array | Float64Array | number[]

Inherited from

Matrix4.toArray

Defined in

src/math/Matrix.ts:28

---

set

▸ set(m00, m01, m02, m03, m10, m11, m12, m13, m20, m21, m22, m23, m30, m31, m32, m33): ProjectionMatrix

将此矩阵的每一项设置为给定的值

Parameters

Name	Type
m00	any
m01	any
m02	any
m03	any
m10	any
m11	any
m12	any
m13	any
m20	any
m21	any
m22	any
m23	any
m30	any
m31	any
m32	any
m33	any

Returns

ProjectionMatrix

Inherited from

Matrix4.set

Defined in

src/math/Matrix4.ts:177

---

transpose

▸ transpose(): ProjectionMatrix

将此矩阵转换为转置矩阵

Returns

ProjectionMatrix

this

Inherited from

Matrix4.transpose

Defined in

src/math/Matrix4.ts:186

---

invert

▸ invert(m?): ProjectionMatrix

将此矩阵转换为逆矩阵

Parameters

Name	Type	Description
m	ProjectionMatrix	默认为当前实例

Returns

ProjectionMatrix

Matrix4

Inherited from

Matrix4.invert

Defined in

src/math/Matrix4.ts:196

---

adjoint

▸ adjoint(m?): ProjectionMatrix

计算此矩阵的伴随矩阵

Parameters

Name	Type	Description
m	ProjectionMatrix	默认为当前实例

Returns

ProjectionMatrix

Inherited from

Matrix4.adjoint

Defined in

src/math/Matrix4.ts:205

---

determinant

▸ determinant(): any

计算行列式

Returns

any

Inherited from

Matrix4.determinant

Defined in

src/math/Matrix4.ts:214

---

add

▸ add(a, b?): ProjectionMatrix

将两个 Matrix4 矩阵相加

Parameters

Name	Type	Description
a	Matrix4
b?	Matrix4	如果不传，计算 this 和 a 的和

Returns

ProjectionMatrix

this

Inherited from

Matrix4.add

Defined in

src/math/Matrix4.ts:224

---

subtract

▸ subtract(a, b?): ProjectionMatrix

将两个 Matrix4 矩阵相减

Parameters

Name	Type	Description
a	Matrix4
b?	Matrix4	如果不传，计算 this 和 a 的差

Returns

ProjectionMatrix

this

Inherited from

Matrix4.subtract

Defined in

src/math/Matrix4.ts:240

---

multiply

▸ multiply(a, b?): ProjectionMatrix

计算两个 Matrix4 矩阵的乘积

Parameters

Name	Type	Description
a	Matrix4
b?	Matrix4	如果不传，计算 this 和 a 的乘积

Returns

ProjectionMatrix

this

Inherited from

Matrix4.multiply

Defined in

src/math/Matrix4.ts:255

---

multiplyScalar

▸ multiplyScalar(a?, b?): ProjectionMatrix

计算 Matrix4 与标量的乘积

Parameters

Name	Type	Description
a	Matrix4	如果不传，计算 this 和 b 的乘积
b?	number

Returns

ProjectionMatrix

Inherited from

Matrix4.multiplyScalar

Defined in

src/math/Matrix4.ts:269

---

premultiply

▸ premultiply(a, b?): ProjectionMatrix

左乘

Parameters

Name	Type	Description
a	Matrix4
b?	Matrix4	如果不传，计算 this 和 a 的左乘

Returns

ProjectionMatrix

this

Inherited from

Matrix4.premultiply

Defined in

src/math/Matrix4.ts:280

---

translate

▸ translate(v): ProjectionMatrix

通过给定的向量 Vector3 平移此矩阵

Parameters

Name	Type	Description
v	Vector3	向量

Returns

ProjectionMatrix

this

Inherited from

Matrix4.translate

Defined in

src/math/Matrix4.ts:294

---

rotate

▸ rotate(rad): ProjectionMatrix

旋转此矩阵

Parameters

Name	Type	Description
rad	number	弧度

Returns

ProjectionMatrix

this

Inherited from

Matrix4.rotate

Defined in

src/math/Matrix4.ts:304

---

scale

▸ scale(vec3): ProjectionMatrix

通过给定的 Vector3 向量缩放此矩阵

Parameters

Name	Type
vec3	Vector3

Returns

ProjectionMatrix

Inherited from

Matrix4.scale

Defined in

src/math/Matrix4.ts:313

---

scaleScalar

▸ scaleScalar(s): ProjectionMatrix

通过标量 s 缩放此矩阵，默认在内部构建一个三维向量 [s, s, s]

Parameters

Name	Type
s	number

Returns

ProjectionMatrix

Inherited from

Matrix4.scaleScalar

Defined in

src/math/Matrix4.ts:322

---

fromTranslation

▸ fromTranslation(vec): ProjectionMatrix

从平移向量创建矩阵

Parameters

Name	Type
vec	Vector3

Returns

ProjectionMatrix

Inherited from

Matrix4.fromTranslation

Defined in

src/math/Matrix4.ts:331

---

fromRotation

▸ fromRotation(rad, axis): ProjectionMatrix

从给定轴和旋转角度创建矩阵

Parameters

Name	Type	Description
rad	number	弧度
axis	any	轴

Returns

ProjectionMatrix

Inherited from

Matrix4.fromRotation

Defined in

src/math/Matrix4.ts:341

---

fromRotationX

▸ fromRotationX(rad): ProjectionMatrix

从绕 X 轴的给定角度创建矩阵

Parameters

Name	Type
rad	number

Returns

ProjectionMatrix

Inherited from

Matrix4.fromRotationX

Defined in

src/math/Matrix4.ts:350

---

fromRotationY

▸ fromRotationY(rad): ProjectionMatrix

从绕 Y 轴的给定角度创建矩阵

Parameters

Name	Type
rad	number

Returns

ProjectionMatrix

Inherited from

Matrix4.fromRotationY

Defined in

src/math/Matrix4.ts:359

---

fromRotationZ

▸ fromRotationZ(rad): ProjectionMatrix

从绕 Z 轴的给定角度创建矩阵

Parameters

Name	Type
rad	any

Returns

ProjectionMatrix

Inherited from

Matrix4.fromRotationZ

Defined in

src/math/Matrix4.ts:368

---

fromScale

▸ fromScale(vec): ProjectionMatrix

从缩放向量计算矩阵

Parameters

Name	Type
vec	Vector3

Returns

ProjectionMatrix

Inherited from

Matrix4.fromScale

Defined in

src/math/Matrix4.ts:377

---

fromRotationTranslation

▸ fromRotationTranslation(quat, v): ProjectionMatrix

从平移向量和四元数计算矩阵

Parameters

Name	Type
quat	Quaternion
v	Vector3

Returns

ProjectionMatrix

Inherited from

Matrix4.fromRotationTranslation

Defined in

src/math/Matrix4.ts:387

---

fromPerspective

▸ fromPerspective(fov, aspect, near, far): ProjectionMatrix

创建一个透视投影矩阵

Parameters

Name	Type
fov	any
aspect	any
near	any
far	any

Returns

ProjectionMatrix

Inherited from

Matrix4.fromPerspective

Defined in

src/math/Matrix4.ts:399

---

fromOrthogonal

▸ fromOrthogonal(left, right, bottom, top, near, far): ProjectionMatrix

创建一个正交投影矩阵

Parameters

Name	Type
left	any
right	any
bottom	any
top	any
near	any
far	any

Returns

ProjectionMatrix

Inherited from

Matrix4.fromOrthogonal

Defined in

src/math/Matrix4.ts:413

---

fromQuat

▸ fromQuat(q): ProjectionMatrix

从给定的四元数计算矩阵

Parameters

Name	Type
q	Quaternion

Returns

ProjectionMatrix

Inherited from

Matrix4.fromQuat

Defined in

src/math/Matrix4.ts:422

---

equals

▸ equals(mat4): any

判断两个矩阵是否近似相等

Parameters

Name	Type
mat4	any

Returns

any

Inherited from

Matrix4.equals

Defined in

src/math/Matrix4.ts:431

---

getRotation

▸ getRotation(q?): Quaternion

获取旋转向量

Parameters

Name	Type
q	Quaternion

Returns

Quaternion

Inherited from

Matrix4.getRotation

Defined in

src/math/Matrix4.ts:439

---

getScale

▸ getScale(v?): Vector3

获取缩放向量

Parameters

Name	Type
v	Vector3

Returns

Vector3

Inherited from

Matrix4.getScale

Defined in

src/math/Matrix4.ts:449

---

getTranslation

▸ getTranslation(v?): Vector3

获取平移向量

Parameters

Name	Type
v	Vector3

Returns

Vector3

Inherited from

Matrix4.getTranslation

Defined in

src/math/Matrix4.ts:459

---

rotateX

▸ rotateX(rad): ProjectionMatrix

围绕 X 轴按给定弧度旋转矩阵

Parameters

Name	Type
rad	any

Returns

ProjectionMatrix

Inherited from

Matrix4.rotateX

Defined in

src/math/Matrix4.ts:469

---

rotateY

▸ rotateY(rad): ProjectionMatrix

围绕 Y 轴按给定弧度旋转矩阵

Parameters

Name	Type
rad	any

Returns

ProjectionMatrix

Inherited from

Matrix4.rotateY

Defined in

src/math/Matrix4.ts:478

---

rotateZ

▸ rotateZ(rad): ProjectionMatrix

围绕 Z 轴按给定弧度旋转矩阵

Parameters

Name	Type
rad	any

Returns

ProjectionMatrix

Inherited from

Matrix4.rotateZ

Defined in

src/math/Matrix4.ts:487

---

compose

▸ compose(v, q, s): ProjectionMatrix

从四元数旋转、平移和缩放创建矩阵

Parameters

Name	Type
v	Vector3
q	Quaternion
s	Vector3

Returns

ProjectionMatrix

Inherited from

Matrix4.compose

Defined in

src/math/Matrix4.ts:498

---

decompose

▸ decompose(): Object

从矩阵转换到四元数、平移和缩放向量

Returns

Object

Name	Type
rotation	Quaternion
scale	Vector3
translation	Vector3

Inherited from

Matrix4.decompose

Defined in

src/math/Matrix4.ts:506

---

copy

▸ copy(m): ProjectionMatrix

将传入的 Matrix4 复制到此矩阵

Parameters

Name	Type	Description
m	Matrix4	源矩阵

Returns

ProjectionMatrix

this

Inherited from

Matrix4.copy

Defined in

src/math/Matrix4.ts:519

---

clone

▸ clone(): Matrix4

从此矩阵创建一个新的 4*4 矩阵

Returns

Matrix4

a new Matrix4

Inherited from

Matrix4.clone

Defined in

src/math/Matrix4.ts:528

---

frustum

▸ frustum(mat4, left, right, top, bottom, near, far): ProjectionMatrix

一般用于生成相机的视椎体，用来做视椎剔除加速渲染

Parameters

Name	Type
mat4	any
left	any
right	any
top	any
bottom	any
near	any
far	any

Returns

ProjectionMatrix

Defined in

src/math/ProjectionMatrix.ts:17

---

orthographic

▸ orthographic(left, right, top, bottom, near, far): ProjectionMatrix

生成平面相机投影矩阵

Parameters

Name	Type
left	any
right	any
top	any
bottom	any
near	any
far	any

Returns

ProjectionMatrix

Defined in

src/math/ProjectionMatrix.ts:31

---

perspective

▸ perspective(fovy, aspect, near, far): ProjectionMatrix

生成透视相机投影矩阵

Parameters

Name	Type
fovy	any
aspect	any
near	any
far	any

Returns

ProjectionMatrix

Defined in

src/math/ProjectionMatrix.ts:43

---

lookAt

▸ lookAt(eye, target?, up?): ProjectionMatrix

设置物体的朝向

Parameters

Name	Type
eye	any
target	Vector3
up	Vector3

Returns

ProjectionMatrix

Defined in

src/math/ProjectionMatrix.ts:54

---

toString

▸ toString(): string

转换为字符串

Returns

string

Overrides

Matrix4.toString

Defined in

src/math/ProjectionMatrix.ts:62