预乘，右手坐标系

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矩阵中的轴

[X轴→m11m12m13m14Y轴→m21m22m23m24Z轴→m31m32m33m34平移→m41m42m43m44]\begin{array}{c} \begin{bmatrix*}[r] \color{red} \textrm{X-Axis} \rightarrow & \color{red} \mathbf{m_{11}} & \color{red} \mathbf{m_{12}} & \color{red} \mathbf{m_{13}} & \color{gray} m_{14}\\ \color{green} \textrm{Y-Axis} \rightarrow & \color{green} \mathbf{m_{21}} & \color{green} \mathbf{m_{22}} & \color{green} \mathbf{m_{23}} & \color{gray} m_{24}\\ \color{blue} \textrm{Z-Axis} \rightarrow & \color{blue} \mathbf{m_{31}} & \color{blue} \mathbf{m_{32}} & \color{blue} \mathbf{m_{33}} & \color{gray} m_{34}\\ \textrm{Translate} \rightarrow & \mathbf{m_{41}} & \mathbf{m_{42}} & \mathbf{m_{43}} & \color{gray} m_{44}\\ \end{bmatrix*} \end{array}

平移变换

[100001000010TxTyTz1]\begin{bmatrix} 1 & 0 & 0 & 0\\ 0 & 1 & 0 & 0\\ 0 & 0 & 1 & 0\\ T_x & T_y & T_z & 1\\ \end{bmatrix}

缩放变换

[Sx0000Sy0000Sz00001]\begin{bmatrix} S_x & 0 & 0 & 0\\ 0 & S_y & 0 & 0\\ 0 & 0 & S_z & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix}

旋转变换

  • 从欧拉角
X 轴Y 轴Z 轴[10000cos⁡(θ)sin⁡(θ)00−sin⁡(θ)cos⁡(θ)00001][cos⁡(θ)0−sin⁡(θ)00100sin⁡(θ)0cos⁡(θ)00001][cos⁡(θ)sin⁡(θ)00−sin⁡(θ)cos⁡(θ)0000100001]\begin{array}{ccc} \textrm{X - Axis} & \textrm{Y - Axis} & \textrm{Z - Axis} \\ \begin{bmatrix} 1 & 0 & 0 & 0\\ 0 & \cos(\theta) & \sin(\theta) & 0\\ 0 & -\sin(\theta) & \cos(\theta) & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} & \begin{bmatrix} \cos(\theta) & 0 & -\sin(\theta) & 0\\ 0 & 1 & 0 & 0\\ \sin(\theta) & 0 & \cos(\theta) & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} & \begin{bmatrix} \cos(\theta) & \sin(\theta) & 0 & 0\\ -\sin(\theta) & \cos(\theta) & 0 & 0\\ 0 & 0 & 1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} \end{array}
  • 从四元数

四元数定义为 Q:a+bi+cj+dk=(r,v⃗)=(Qw,Qx,Qy,Qz)Q : a + b\mathbf{i} + c\mathbf{j} + d\mathbf{k} = (r, \vec{v}) = (Q_w, Q_x, Q_y, Q_z)

[1−2(Qy2+Qz2)2(QxQy+QzQw)2(QxQz−QyQw)02(QxQy−QzQw)1−2(Qx2+Qz2)2(QyQz+QxQw)02(QxQz+QyQw)2(QyQz−QxQw)1−2(Qx2+Qy2)00001]\begin{bmatrix} 1 - 2(Q_y^2 + Q_z^2) & 2(Q_xQ_y + Q_zQ_w) & 2(Q_xQ_z - Q_yQ_w) & 0\\ 2(Q_xQ_y - Q_zQ_w) & 1 - 2(Q_x^2 + Q_z^2) & 2(Q_yQ_z + Q_xQ_w) & 0\\ 2(Q_xQ_z + Q_yQ_w) & 2(Q_yQ_z - Q_xQ_w) & 1 - 2(Q_x^2 + Q_y^2) & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix}
  • 从轴角

轴角定义为 U:cos⁡(θ)+sin⁡(θ)(u^x,u^y,u^z)U : \cos(\theta) + \sin(\theta)(\hat{u}_x, \hat{u}_y, \hat{u}_z)

其中 :∣∣u^∣∣=1: ||\hat{u}|| = 1

[(1−c)u^x2+c(1−c)u^xu^y+su^z(1−c)u^xu^z−su^y0(1−c)u^xu^y−su^z(1−c)u^y2+c(1−c)u^yu^z+su^x0(1−c)u^xu^z+su^y(1−c)u^yu^z−su^x(1−c)u^z2+c00001]\begin{bmatrix} (1-c)\hat{u}_x^2 + c & (1-c)\hat{u}_x\hat{u}_y + s\hat{u}_z & (1-c)\hat{u}_x\hat{u}_z - s\hat{u}_y & 0\\ (1-c)\hat{u}_x\hat{u}_y - s\hat{u}_z & (1-c)\hat{u}_y^2 + c & (1-c)\hat{u}_y\hat{u}_z + s\hat{u}_x & 0\\ (1-c)\hat{u}_x\hat{u}_z + s\hat{u}_y & (1-c)\hat{u}_y\hat{u}_z - s\hat{u}_x & (1-c)\hat{u}_z^2 + c & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix}

反射变换

  • 轴平面对称
XY PlaneXZ PlaneYZ Plane[1000010000−100001][10000−10000100001][−1000010000100001]\begin{array}{ccc} \textrm{XY Plane} & \textrm{XZ Plane} & \textrm{YZ Plane}\\ \begin{bmatrix} 1 & 0 & 0 & 0\\ 0 & 1 & 0 & 0\\ 0 & 0 & -1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} & \begin{bmatrix} 1 & 0 & 0 & 0\\ 0 & -1 & 0 & 0\\ 0 & 0 & 1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} & \begin{bmatrix} -1 & 0 & 0 & 0\\ 0 & 1 & 0 & 0\\ 0 & 0 & 1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} \end{array}
  • 轴对称
X - AxisY - AxisZ - Axis[10000−10000−100001][−1000010000−100001][−10000−10000100001]\begin{array}{ccc} \textrm{X - Axis} & \textrm{Y - Axis} & \textrm{Z - Axis} \\ \begin{bmatrix} 1 & 0 & 0 & 0\\ 0 & -1 & 0 & 0\\ 0 & 0 & -1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} & \begin{bmatrix} -1 & 0 & 0 & 0\\ 0 & 1 & 0 & 0\\ 0 & 0 & -1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} & \begin{bmatrix} -1 & 0 & 0 & 0\\ 0 & -1 & 0 & 0\\ 0 & 0 & 1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} \end{array}
  • 中心对称
[−10000−10000−100001]\begin{bmatrix} -1 & 0 & 0 & 0\\ 0 & -1 & 0 & 0\\ 0 & 0 & -1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix}
  • 一般平面对称

平面定义为 P:ax+by+cz+d=0P : ax + by + cz + d = 0

[1−2a2−2ab−2ac0−2ab1−2b2−2bc0−2ac−2bc1−2c20−2ad−2bd−2cd1]\begin{bmatrix} 1-2a^2 & -2ab & -2ac & 0\\ -2ab & 1-2b^2 & -2bc & 0\\ -2ac & -2bc & 1-2c^2 & 0\\ -2ad & -2bd & -2cd & 1\\ \end{bmatrix}

剪切变换

X - AxisY - AxisZ - AxisGeneral[1HyHz0010000100001][1000Hx1Hz000100001][10000100HxHy100001][1HyxHzx0Hxy1Hzy0HxzHyz100001]\begin{array}{cccc} \textrm{X - Axis} & \textrm{Y - Axis} & \textrm{Z - Axis} & \textrm{General}\\ \begin{bmatrix} 1 & H_y & H_z & 0\\ 0 & 1 & 0 & 0\\ 0 & 0 & 1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} & \begin{bmatrix} 1 & 0 & 0 & 0\\ H_x & 1 & H_z & 0\\ 0 & 0 & 1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} & \begin{bmatrix} 1 & 0 & 0 & 0\\ 0 & 1 & 0 & 0\\ H_x & H_y & 1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} & \begin{bmatrix} 1 & H_y^x & H_z^x & 0\\ H_x^y & 1 & H_z^y & 0\\ H_x^z & H_y^z & 1 & 0\\ 0 & 0 & 0 & 1\\ \end{bmatrix} \end{array}
  • 透视变换 [n,f]\mathbf{\lbrack n,f \rbrack}，反转裁剪空间 z∈[1,0]\mathbf{z \in \lbrack 1,0 \rbrack}
视图空间左手 NDC 空间右手 NDC 空间
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视锥体对称垂直视场角对称水平视场角[2nr−l00002nt−b00r+lr−lt+bt−bnf−n−100fnf−n0][whcot⁡(α2)0000cot⁡(α2)0000nf−n−100fnf−n0][cot⁡(β2)0000hwcot⁡(β2)0000nf−n−100fnf−n0]\begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r+l}{r-l} & \frac{t+b}{t-b} & \frac{n}{f-n} & -1\\ 0 & 0 & \frac{fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ 0 & 0 & \frac{n}{f-n} & -1\\ 0 & 0 & \frac{fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ 0 & 0 & \frac{n}{f-n} & -1\\ 0 & 0 & \frac{fn}{f-n} & 0\\ \end{bmatrix} \end{array}
  • 透视变换，无限远平面 [n,∞]\mathbf{\lbrack n,\infty \rbrack}，反转裁剪空间 z∈[1,0]\mathbf{z \in \lbrack 1,0 \rbrack}
视图空间左手 NDC 空间右手 NDC 空间
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FrustumSymmetric Vertical FOVSymmetric Horizontal FOV[2nr−l00002nt−b00r+lr−lt+bt−b0−100n0][whcot⁡(α2)0000cot⁡(α2)00000−100n0][cot⁡(β2)0000hwcot⁡(β2)00000−100n0]\begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r+l}{r-l} & \frac{t+b}{t-b} & 0 & -1\\ 0 & 0 & n & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ 0 & 0 & 0 & -1\\ 0 & 0 & n & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ 0 & 0 & 0 & -1\\ 0 & 0 & n & 0\\ \end{bmatrix} \end{array}
  • 透视变换 [n,f]\mathbf{\lbrack n,f \rbrack}, Clip Space z∈[−1,1]\mathbf{z \in \lbrack -1,1 \rbrack}
视图空间左手 NDC 空间右手 NDC 空间
imageimageimageimage
FrustumSymmetric Vertical FOVSymmetric Horizontal FOV[2nr−l00002nt−b00r+lr−lt+bt−b−f+nf−n−100−2fnf−n0][whcot⁡(α2)0000cot⁡(α2)0000−f+nf−n−100−2fnf−n0][cot⁡(β2)0000hwcot⁡(β2)0000−f+nf−n−100−2fnf−n0]\begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r+l}{r-l} & \frac{t+b}{t-b} & -\frac{f+n}{f-n} & -1\\ 0 & 0 & -\frac{2fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ 0 & 0 & -\frac{f+n}{f-n} & -1\\ 0 & 0 & -\frac{2fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ 0 & 0 & -\frac{f+n}{f-n} & -1\\ 0 & 0 & -\frac{2fn}{f-n} & 0\\ \end{bmatrix} \end{array}
  • 透视变换 远平面无限 [n,∞]\mathbf{\lbrack n,\infty \rbrack}, Clip Space z∈[−1,1]\mathbf{z \in \lbrack -1,1 \rbrack}
视图空间左手 NDC 空间右手 NDC 空间
imageimageimageimage
FrustumSymmetric Vertical FOVSymmetric Horizontal FOV[2nr−l00002nt−b00r+lr−lt+bt−b−1−100−2n0][whcot⁡(α2)0000cot⁡(α2)0000−1−100−2n0][cot⁡(β2)0000hwcot⁡(β2)0000−1−100−2n0]\begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r+l}{r-l} & \frac{t+b}{t-b} & -1 & -1\\ 0 & 0 & -2n & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ 0 & 0 & -1 & -1\\ 0 & 0 & -2n & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ 0 & 0 & -1 & -1\\ 0 & 0 & -2n & 0\\ \end{bmatrix} \end{array}
  • 透视变换 [n,f]\mathbf{\lbrack n,f \rbrack}，反向裁剪空间 z∈[1,−1]\mathbf{z \in \lbrack 1,-1 \rbrack}
视图空间左手 NDC 空间右手 NDC 空间
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截头体对称垂直视场角对称水平视场角[2nr−l00002nt−b00r+lr−lt+bt−bf+nf−n−1002fnf−n0][whcot⁡(α2)0000cot⁡(α2)0000f+nf−n−1002fnf−n0][cot⁡(β2)0000hwcot⁡(β2)0000f+nf−n−1002fnf−n0]\begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r+l}{r-l} & \frac{t+b}{t-b} & \frac{f+n}{f-n} & -1\\ 0 & 0 & \frac{2fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ 0 & 0 & \frac{f+n}{f-n} & -1\\ 0 & 0 & \frac{2fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ 0 & 0 & \frac{f+n}{f-n} & -1\\ 0 & 0 & \frac{2fn}{f-n} & 0\\ \end{bmatrix} \end{array}
  • 透视变换的无限远平面 [n,∞]\mathbf{\lbrack n,\infty \rbrack}，反转的裁剪空间 z∈[1,−1]\mathbf{z \in \lbrack 1,-1 \rbrack}
视图空间左手 NDC 空间右手 NDC 空间
imageimageimageimage
FrustumSymmetric Vertical FOVSymmetric Horizontal FOV[2nr−l00002nt−b00r+lr−lt+bt−b12n00−10][whcot⁡(α2)0000cot⁡(α2)00001−1002n0][cot⁡(β2)0000hwcot⁡(β2)00001−1002n0]\begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r+l}{r-l} & \frac{t+b}{t-b} & 1 & 2n\\ 0 & 0 & -1 & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ 0 & 0 & 1 & -1\\ 0 & 0 & 2n & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ 0 & 0 & 1 & -1\\ 0 & 0 & 2n & 0\\ \end{bmatrix} \end{array}

抖动正交变换

ll - 视锥体的左坐标

rr - 正射投影视锥体的右坐标

bb - 正射投影视锥体的底坐标

tt - 正射投影视锥体的顶坐标

nn - 正射投影视锥体近平面距离

ff - 正射投影视锥体远平面距离

ww - 正射投影视锥体近平面宽度

hh - 正射投影视锥体近平面高度

jxj_x - NDC空间中的x方向抖动

jyj_y - NDC空间中的y方向抖动

  • 抖动正交变换裁剪空间 z∈[0,1]\mathbf{z \in \lbrack 0,1 \rbrack}
GeneralSymmetricSymmetric 2D[2r−l00002t−b0000−1f−n0−r(1+jx)+l(1−jx)r−l−t(1+jy)+b(1−jy)t−b−nf−n1][2w00002h0000−1f−n0−jx−jy−nf−n1][2w00002h0000−120−jx−jy121]\begin{array}{ccc} \textrm{General} & \textrm{Symmetric} & \textrm{Symmetric 2D} \\ \begin{bmatrix} \frac{2}{r-l} & 0 & 0 & 0\\ 0 & \frac{2}{t-b} & 0 & 0\\ 0 & 0 & -\frac{1}{f-n} & 0\\ -\frac{r(1+j_x)+l(1-j_x)}{r-l} & -\frac{t(1+j_y)+b(1-j_y)}{t-b} & -\frac{n}{f-n} & 1\\ \end{bmatrix} & \begin{bmatrix} \frac{2}{w} & 0 & 0 & 0\\ 0 & \frac{2}{h} & 0 & 0\\ 0 & 0 & -\frac{1}{f-n} & 0\\ -j_x & -j_y & -\frac{n}{f-n} & 1\\ \end{bmatrix} & \begin{bmatrix} \frac{2}{w} & 0 & 0 & 0\\ 0 & \frac{2}{h} & 0 & 0\\ 0 & 0 & -\frac{1}{2} & 0\\ -j_x & -j_y & \frac{1}{2} & 1\\ \end{bmatrix} \end{array}
  • 抖动正交变换裁剪空间 z∈[−1,1]\mathbf{z \in \lbrack -1,1 \rbrack}
GeneralSymmetricSymmetric 2D[2r−l00002t−b0000−2f−n0−r(1+jx)+l(1−jx)r−l−t(1+jy)+b(1−jy)t−b−f+nf−n1][2w00002h0000−2f−n0−jx−jy−f+nf−n1][1w00001h0000−10−jx−jy01]\begin{array}{ccc} \textrm{General} & \textrm{Symmetric} & \textrm{Symmetric 2D} \\ \begin{bmatrix} \frac{2}{r-l} & 0 & 0 & 0\\ 0 & \frac{2}{t-b} & 0 & 0\\ 0 & 0 & -\frac{2}{f-n} & 0\\ -\frac{r(1+j_x)+l(1-j_x)}{r-l} & -\frac{t(1+j_y)+b(1-j_y)}{t-b} & -\frac{f+n}{f-n} & 1\\ \end{bmatrix} & \begin{bmatrix} \frac{2}{w} & 0 & 0 & 0\\ 0 & \frac{2}{h} & 0 & 0\\ 0 & 0 & -\frac{2}{f-n} & 0\\ -j_x & -j_y & -\frac{f+n}{f-n} & 1\\ \end{bmatrix} & \begin{bmatrix} \frac{1}{w} & 0 & 0 & 0\\ 0 & \frac{1}{h} & 0 & 0\\ 0 & 0 & -1 & 0\\ -j_x & -j_y & 0 & 1\\ \end{bmatrix} \end{array}

抖动透视变换

ll - 近平面左侧坐标

rr - 近平面右侧坐标

bb - 近平面底部坐标

tt - 近平面顶部坐标

nn - 近平面到观察点的距离

ff - 远平面到观察点的距离

ww - 近平面宽度

hh - 近平面高度

jxj_x - NDC空间中的x方向抖动

jyj_y - NDC空间中的y方向抖动

α\alpha - 近平面左、右平面的夹角

β\beta - 近平面上、下平面的夹角

  • Jitter Perspective Transformation [n,f]\mathbf{\lbrack n,f \rbrack}, Clip Space z∈[0,1]\mathbf{z \in \lbrack 0,1 \rbrack}
FrustumSymmetric Vertical FOVSymmetric Horizontal FOV[2nr−l00002nt−b00r(1+jx)+l(1−jx)r−lt(1+jy)+b(1−jy)t−b−ff−n−100−fnf−n0][whcot⁡(α2)0000cot⁡(α2)00jxjy−ff−n−100−fnf−n0][cot⁡(β2)0000hwcot⁡(β2)00jxjy−ff−n−100−fnf−n0] \begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r(1+j_x)+l(1-j_x)}{r-l} & \frac{t(1+j_y)+b(1-j_y)}{t-b} & -\frac{f}{f-n} & -1\\ 0 & 0 & -\frac{fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ j_x & j_y & -\frac{f}{f-n} & -1\\ 0 & 0 & -\frac{fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ j_x & j_y & -\frac{f}{f-n} & -1\\ 0 & 0 & -\frac{fn}{f-n} & 0\\ \end{bmatrix} \end{array}
  • Jitter Perspective Transformation infinite far plane [n,∞]\mathbf{\lbrack n,\infty \rbrack}, Clip Space z∈[0,1]\mathbf{z \in \lbrack 0,1 \rbrack}
FrustumSymmetric Vertical FOVSymmetric Horizontal FOV[2nr−l00002nt−b00r(1+jx)+l(1−jx)r−lt(1+jy)+b(1−jy)t−b−1−100−n0][whcot⁡(α2)0000cot⁡(α2)00jxjy−1−100−n0][cot⁡(β2)0000hwcot⁡(β2)00jxjy−1−100−n0] \begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r(1+j_x)+l(1-j_x)}{r-l} & \frac{t(1+j_y)+b(1-j_y)}{t-b} & -1 & -1\\ 0 & 0 & -n & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ j_x & j_y & -1 & -1\\ 0 & 0 & -n & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ j_x & j_y & -1 & -1\\ 0 & 0 & -n & 0\\ \end{bmatrix} \end{array}
  • 抖动透视变换 [n,f]\mathbf{\lbrack n,f \rbrack}，裁剪空间 z∈[−1,1]\mathbf{z \in \lbrack -1,1 \rbrack}
FrustumSymmetric Vertical FOVSymmetric Horizontal FOV[2nr−l00002nt−b00r(1+jx)+l(1−jx)r−lt(1+jy)+b(1−jy)t−b−f+nf−n−100−2fnf−n0][whcot⁡(α2)0000cot⁡(α2)00jxjy−f+nf−n−100−2fnf−n0][cot⁡(β2)0000hwcot⁡(β2)00jxjy−f+nf−n−100−2fnf−n0] \begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r(1+j_x)+l(1-j_x)}{r-l} & \frac{t(1+j_y)+b(1-j_y)}{t-b} & -\frac{f+n}{f-n} & -1\\ 0 & 0 & -\frac{2fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ j_x & j_y & -\frac{f+n}{f-n} & -1\\ 0 & 0 & -\frac{2fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ j_x & j_y & -\frac{f+n}{f-n} & -1\\ 0 & 0 & -\frac{2fn}{f-n} & 0\\ \end{bmatrix} \end{array}
  • 抖动透视变换无限远平面 [n,∞]\mathbf{\lbrack n,\infty \rbrack}，裁剪空间 z∈[−1,1]\mathbf{z \in \lbrack -1,1 \rbrack}
FrustumSymmetric Vertical FOVSymmetric Horizontal FOV[2nr−l00002nt−b00r(1+jx)+l(1−jx)r−lt(1+jy)+b(1−jy)t−b−1−100−2n0][whcot⁡(α2)0000cot⁡(α2)00jxjy−1−100−2n0][cot⁡(β2)0000hwcot⁡(β2)00jxjy−1−100−2n0] \begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r(1+j_x)+l(1-j_x)}{r-l} & \frac{t(1+j_y)+b(1-j_y)}{t-b} & -1 & -1\\ 0 & 0 & -2n & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ j_x & j_y & -1 & -1\\ 0 & 0 & -2n & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ j_x & j_y & -1 & -1\\ 0 & 0 & -2n & 0\\ \end{bmatrix} \end{array}
  • 抖动透视变换 [n,f]\mathbf{\lbrack n,f \rbrack}, 反转裁剪空间 z∈[1,−1]\mathbf{z \in \lbrack 1,-1 \rbrack}
FrustumSymmetric Vertical FOVSymmetric Horizontal FOV[2nr−l00002nt−b00r(1+jx)+l(1−jx)r−lt(1+jy)+b(1−jy)t−bf+nf−n−1002fnf−n0][whcot⁡(α2)0000cot⁡(α2)00jxjyf+nf−n−1002fnf−n0][cot⁡(β2)0000hwcot⁡(β2)00jxjyf+nf−n−1002fnf−n0] \begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r(1+j_x)+l(1-j_x)}{r-l} & \frac{t(1+j_y)+b(1-j_y)}{t-b} & \frac{f+n}{f-n} & -1\\ 0 & 0 & \frac{2fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ j_x & j_y & \frac{f+n}{f-n} & -1\\ 0 & 0 & \frac{2fn}{f-n} & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ j_x & j_y & \frac{f+n}{f-n} & -1\\ 0 & 0 & \frac{2fn}{f-n} & 0\\ \end{bmatrix} \end{array}
  • 抖动透视变换无限远平面 [n,∞]\mathbf{\lbrack n,\infty \rbrack}, 反转裁剪空间 z∈[1,−1]\mathbf{z \in \lbrack 1,-1 \rbrack}
FrustumSymmetric Vertical FOVSymmetric Horizontal FOV[2nr−l00002nt−b00r(1+jx)+l(1−jx)r−lt(1+jy)+b(1−jy)t−b12n00−10][whcot⁡(α2)0000cot⁡(α2)00jxjy1−1002n0][cot⁡(β2)0000hwcot⁡(β2)00jxjy1−1002n0] \begin{array}{ccc} \textrm{Frustum} & \textrm{Symmetric Vertical FOV} & \textrm{Symmetric Horizontal FOV} \\ \begin{bmatrix} \frac{2n}{r-l} & 0 & 0 & 0\\ 0 & \frac{2n}{t-b} & 0 & 0\\ \frac{r(1+j_x)+l(1-j_x)}{r-l} & \frac{t(1+j_y)+b(1-j_y)}{t-b} & 1 & 2n\\ 0 & 0 & -1 & 0\\ \end{bmatrix} & \begin{bmatrix} \frac{w}{h}\cot(\frac{\alpha}{2}) & 0 & 0 & 0\\ 0 & \cot(\frac{\alpha}{2}) & 0 & 0\\ j_x & j_y & 1 & -1\\ 0 & 0 & 2n & 0\\ \end{bmatrix} & \begin{bmatrix} \cot(\frac{\beta}{2}) & 0 & 0 & 0\\ 0 & \frac{h}{w}\cot(\frac{\beta}{2}) & 0 & 0\\ j_x & j_y & 1 & -1\\ 0 & 0 & 2n & 0\\ \end{bmatrix} \end{array}

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