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屏幕旋转的矩阵结构

tag-icon • tag-icon x11 monitors xrandr
屏幕旋转的矩阵结构

我可以将屏幕旋转设置为反转：

xrandr -o inverted
xinput set-prop 'ELAN Touchscreen' 'Coordinate Transformation Matrix' -1 0 1 0 -1 1 0 0 1

并恢复正常：

xrandr -o normal
xinput set-prop 'ELAN Touchscreen' 'Coordinate Transformation Matrix' 1 0 0 0 1 0 0 0 1

我在这里找到了一个操作方法：https://wiki.ubuntu.com/X/InputCooperativeTransformation
所以我猜（向右 90°）它将是：

# ⎡ 0 -1 1 ⎤
# ⎜ 1  0 0 ⎥
# ⎣ 0  0 1 ⎦
right='0 -1 1 1 0 0 0 0 1'

但是左边右边的“坐标变换矩阵”是什么？

答案1

从问题来看它是一个标准的坐标变换矩阵。

所以：

⎡x_out⎤   ⎡ a b c ⎤   ⎡ x_in ⎤
⎜y_out⎥ = ⎜ d e f ⎥ * ⎜ y_in ⎥
⎣z_out⎦   ⎣ 0 0 1 ⎦   ⎣ z_in ⎦

与z_out= z_in= 1。

IE

x_out = a * x_in + b * y_in + c
y_out = d * x_in + e * y_in + f

您给出的右旋转示例矩阵

⎡ 0 -1 1 ⎤
⎜ 1  0 0 ⎥
⎣ 0  0 1 ⎦

因此意味着

x_out = 1 - y_in
y_out = x_in

对于向左旋转，则相反，即：

x_out = y_in
y_out = 1 - x_in

给出矩阵

⎡  0 1 0 ⎤
⎜ -1 0 1 ⎥
⎣  0 0 1 ⎦

答案2

最后缺失的矩阵将是

left='0 1 0 -1 0 1 0 0 1'

我设法编写了一个脚本，每次调用它时都会轮换脚本：

https://gist.github.com/rubo77/daa262e0229f6e398766

答案3

因此，我在笔记本电脑上完成了触摸屏和触摸板的所有转换……假定触控板物理方向位于用户前面，位于用户键盘和 eDP1 之间。无论我以哪种方式旋转 x 显示，鼠标光标都会与触控板上的手指一致移动。我很久以前就这样做了，忘记了逻辑。现在，我使用xrandr -x和添加了 x 上的镜像和 y 上的镜像变换xrandr -y，但我找不到触控板的矩阵坐标，因此屏幕上的光标移动与触控板上的手指移动相同。

function rotate_left (){
    xrandr --output "$connected" --rotate left
    xinput set-prop "$touch" "Evdev Axis Inversion" 0, 1
    xinput set-prop "$touch" "Evdev Axes Swap" 1
    xinput set-prop "$pad" "$TRANSFORM" 0 -1 1 1 0 0 0 0 1
    xinput set-prop "$touch" "$TRANSFORM" 0 -1 1 1 0 0 0 0 1
    echo "left" >/etc/rotate
    echo "icon:$camino/icons/left.png" >>"$track"/ayp
}; export -f rotate_left

function rotate_right (){
    xrandr --output "$connected" --rotate right
    xinput set-prop "$touch" "Evdev Axis Inversion" 0, 1
    xinput set-prop "$touch" "Evdev Axes Swap" 1
    xinput set-prop "$pad" "$TRANSFORM" 0 1 0 -1 0 1 0 0 1
    xinput set-prop "$touch" "$TRANSFORM" 0 1 0 -1 0 1 0 0 1
    echo "right" >/etc/rotate
    echo "icon:$camino/icons/right.png" >>"$track"/ayp
}; export -f rotate_right

function rotate_inverted (){
    xrandr --output "$connected" --rotate inverted
    xinput set-prop "$touch" "Evdev Axis Inversion" 1, 1
    xinput set-prop "$touch" "Evdev Axes Swap" 0
    xinput set-prop "$pad" "$TRANSFORM" -1 0 1 0 -1 1 0 0 1
    xinput set-prop "$touch" "$TRANSFORM" -1 0 1 0 -1 1 0 0 1
    echo "inverted" >/etc/rotate
    echo "icon:$camino/icons/inverted.png" >>"$track"/ayp
}; export -f rotate_inverted

function rotate_normal (){
    xrandr --output "$connected" --rotate normal
    xinput set-prop "$touch" "Evdev Axis Inversion" 1, 1
    xinput set-prop "$touch" "Evdev Axes Swap" 1
    xinput set-prop "$pad" "$TRANSFORM" 1 0 0 0 1 0 0 0 1
    xinput set-prop "$touch" "$TRANSFORM" 1 0 0 0 1 0 0 0 1
    echo "normal" >/etc/rotate
    echo "icon:$camino/icons/normal.png" >>"$track"/ayp
}; export -f rotate_normal
function rotate_flipx {
    xrandr -x
    xinput set-prop "$touch" "Evdev Axis Inversion" 0,0
    xinput set-prop "$touch" "Evdev Axes Swap" 0
   xinput set-prop "$pad" "$TRANSFORM" 3 1 1 -1 1 1
    xinput set-prop "$touch" "$TRANSFORM" -1 0 1 0 -1 1 0 0 1
};export -f rotate_flipx
function rotate_flipy {
 xrandr -y
    xinput set-prop "$touch" "Evdev Axis Inversion" 0, 0
    xinput set-prop "$touch" "Evdev Axes Swap" 0
    xinput set-prop "$pad" "$TRANSFORM" 3 1 1 -1 1 1
    xinput set-prop "$touch" "$TRANSFORM" -1 0 1 0 -1 1 0 0 1
};export -f rotate_flipy
function rotate_flip_normal {
xrandr -o normal
    xinput set-prop "$touch" "Evdev Axis Inversion" 0, 0
    xinput set-prop "$touch" "Evdev Axes Swap" 0
    xinput set-prop "$pad" "$TRANSFORM" 1 0 0 0 1 0 0 0 1
    xinput set-prop "$touch" "$TRANSFORM" 1 0 0 0 1 0 0 0 1
};export rotate_flip_normal

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