Smoothing

Smoothing

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c++ - 使用具有设置延迟的mouse_event进行平滑的鼠标移动C++

我正在编码一个鼠标宏。它需要在屏幕上的每个点之间以设置的延迟满足某些点。例如，它必须在132毫秒内移动（x 14，y 30）。我遇到的问题是mouse_event跳到那个确切的位置，因此我需要包括某种平滑方法，以便它可以平滑地移动到每个点。 （移动越流畅，宏越好）。目前，我正在使用这种平滑每个运动的方法。

效果很好，但是有其局限性，例如，如果需要向左移动10个像素，并且将平滑设置为20，它将继续跳跃。

有谁知道一种更精确的平滑鼠标移动的方法？ （要求准确，流畅）

void Smoothing(int smoothing, int delay, int x, int y) {
    for (int i = 0; i < smoothing; i++) {
        mouse_event(1, x / smoothing, y / smoothing, 0, 0);
        AccurateSleep(delay / smoothing);
    }
    mouse_event(1, x % smoothing, y % smoothing, 0, 0);
    Sleep(delay % smoothing);
}

最佳答案

Linear Interpolation是我阅读问题时（以及the other answer中提到的）的第一个想法。

插值的一般公式为：

x =（1-t）·x0 + t·x1

x ...内插值
x0 ...起始值
x1 ...目标值
t ...插值参数，范围为[0，1]

当我意识到可能构成约束的一些事实（不幸的是，OP并未明确提及）时，我甚至打算将此作为答案。


所有运算都是关于整数值。因此，进行整数算术可能是首选。
用增量值调用mouse_event()和AccurateSleep()。这可能是由OP使用的API决定的。


因此，我三思而后行，做了以下MCVE来类似于OP问题：

#include <iostream>

static int xMouse = 0, yMouse = 0, t = 0;

void mouse_event(int _1, int dx, int dy, int _4, int _5)
{
  xMouse += dx; yMouse += dy;
  std::cout << "mouse_event(" << _1 << ", " << dx << ", " << dy << ", " << _4 << ", " << _5 << "): "
    << xMouse << ", " << yMouse << '\n';
}

void AccurateSleep(int delay)
{
  t += delay;
  std::cout << "AccurateSleep(" << delay << "): " << t << '\n';

}

void Sleep(int delay)
{
  t += delay;
  std::cout << "Sleep(" << delay << "): " << t << '\n';
}

void Smoothing(int smoothing, int delay, int x, int y)
{
    for (int i = 0; i < smoothing; i++) {
        mouse_event(1, x / smoothing, y / smoothing, 0, 0);
        AccurateSleep(delay / smoothing);
    }
    mouse_event(1, x % smoothing, y % smoothing, 0, 0);
    Sleep(delay % smoothing);
}

#define PRINT_AND_DO(...) std::cout << #__VA_ARGS__ << ";\n"; __VA_ARGS__

int main()
{
  PRINT_AND_DO(xMouse = 0; yMouse = 0; t = 0);
  PRINT_AND_DO(Smoothing(10, 132, 14, 30));
  PRINT_AND_DO(xMouse = 0; yMouse = 0; t = 0);
  PRINT_AND_DO(Smoothing(20, 15, 10, 0));
}


输出：

xMouse = 0; yMouse = 0; t = 0;
Smoothing(10, 132, 14, 30);
mouse_event(1, 1, 3, 0, 0): 1, 3
AccurateSleep(13): 13
mouse_event(1, 1, 3, 0, 0): 2, 6
AccurateSleep(13): 26
mouse_event(1, 1, 3, 0, 0): 3, 9
AccurateSleep(13): 39
mouse_event(1, 1, 3, 0, 0): 4, 12
AccurateSleep(13): 52
mouse_event(1, 1, 3, 0, 0): 5, 15
AccurateSleep(13): 65
mouse_event(1, 1, 3, 0, 0): 6, 18
AccurateSleep(13): 78
mouse_event(1, 1, 3, 0, 0): 7, 21
AccurateSleep(13): 91
mouse_event(1, 1, 3, 0, 0): 8, 24
AccurateSleep(13): 104
mouse_event(1, 1, 3, 0, 0): 9, 27
AccurateSleep(13): 117
mouse_event(1, 1, 3, 0, 0): 10, 30
AccurateSleep(13): 130
mouse_event(1, 4, 0, 0, 0): 14, 30
Sleep(2): 132

xMouse = 0; yMouse = 0; t = 0;
Smoothing(20, 15, 10, 0);
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 10, 0, 0, 0): 10, 0
Sleep(15): 15


然后，我对Smoothing()进行了修改，以实现上述插值公式，并对特定情况进行了一些调整：


对于t，使用i / smoothing（i的范围为[1，平滑]）。
当循环为每个i进行插值时，先前迭代的值将保留并用于计算mouse_event()和AccurateSleep()函数调用的增量值。
当然，运算顺序很重要，因为这是整数运算。因此，xI = i * x / smoothing不等于xI = i / smoothing * x。 （即这些积分运算未提供可交换性。）


修改后的Smoothing()：

void Smoothing(int smoothing, int delay, int x, int y)
{
  int x_ = 0, y_ = 0, t_ = 0;
  for (int i = 1; i <= smoothing; ++i) {
    // i / smoothing provides the interpolation paramter in [0, 1]
    int xI = i * x / smoothing;
    int yI = i * y / smoothing;
    int tI = i * delay / smoothing;
    mouse_event(1, xI - x_, yI - y_, 0, 0);
    AccurateSleep(tI - t_);
    x_ = xI; y_ = yI; t_ = tI;
  }
}


输出：

xMouse = 0; yMouse = 0; t = 0;
Smoothing(10, 132, 14, 30);
mouse_event(1, 1, 3, 0, 0): 1, 3
AccurateSleep(13): 13
mouse_event(1, 1, 3, 0, 0): 2, 6
AccurateSleep(13): 26
mouse_event(1, 2, 3, 0, 0): 4, 9
AccurateSleep(13): 39
mouse_event(1, 1, 3, 0, 0): 5, 12
AccurateSleep(13): 52
mouse_event(1, 2, 3, 0, 0): 7, 15
AccurateSleep(14): 66
mouse_event(1, 1, 3, 0, 0): 8, 18
AccurateSleep(13): 79
mouse_event(1, 1, 3, 0, 0): 9, 21
AccurateSleep(13): 92
mouse_event(1, 2, 3, 0, 0): 11, 24
AccurateSleep(13): 105
mouse_event(1, 1, 3, 0, 0): 12, 27
AccurateSleep(13): 118
mouse_event(1, 2, 3, 0, 0): 14, 30
AccurateSleep(14): 132

xMouse = 0; yMouse = 0; t = 0;
Smoothing(20, 15, 10, 0);
mouse_event(1, 0, 0, 0, 0): 0, 0
AccurateSleep(0): 0
mouse_event(1, 1, 0, 0, 0): 1, 0
AccurateSleep(1): 1
mouse_event(1, 0, 0, 0, 0): 1, 0
AccurateSleep(1): 2
mouse_event(1, 1, 0, 0, 0): 2, 0
AccurateSleep(1): 3
mouse_event(1, 0, 0, 0, 0): 2, 0
AccurateSleep(0): 3
mouse_event(1, 1, 0, 0, 0): 3, 0
AccurateSleep(1): 4
mouse_event(1, 0, 0, 0, 0): 3, 0
AccurateSleep(1): 5
mouse_event(1, 1, 0, 0, 0): 4, 0
AccurateSleep(1): 6
mouse_event(1, 0, 0, 0, 0): 4, 0
AccurateSleep(0): 6
mouse_event(1, 1, 0, 0, 0): 5, 0
AccurateSleep(1): 7
mouse_event(1, 0, 0, 0, 0): 5, 0
AccurateSleep(1): 8
mouse_event(1, 1, 0, 0, 0): 6, 0
AccurateSleep(1): 9
mouse_event(1, 0, 0, 0, 0): 6, 0
AccurateSleep(0): 9
mouse_event(1, 1, 0, 0, 0): 7, 0
AccurateSleep(1): 10
mouse_event(1, 0, 0, 0, 0): 7, 0
AccurateSleep(1): 11
mouse_event(1, 1, 0, 0, 0): 8, 0
AccurateSleep(1): 12
mouse_event(1, 0, 0, 0, 0): 8, 0
AccurateSleep(0): 12
mouse_event(1, 1, 0, 0, 0): 9, 0
AccurateSleep(1): 13
mouse_event(1, 0, 0, 0, 0): 9, 0
AccurateSleep(1): 14
mouse_event(1, 1, 0, 0, 0): 10, 0
AccurateSleep(1): 15


Live Demo on coliru

注意：

最后的迭代是使用i == smoothing完成的，因此i / smoothing的结果为1。因此，最后的插值步骤会产生精确的值-像OP原始方法一样，无需进行后期校正。

10-05 21:53
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