tilongzs

// 例如将200*100的图像数据逆时针旋转90°为100*200的图像数据
auto CounterClockwiseRotationData90 = [](ushort* data, int colCount, int rowCount, ushort* rotateData)
	{
        // 逆时针旋转90度
        // 如果原数组中的元素在(row, col)位置，那么在新数组中，该元素应该在(rowCount - 1 - col, row)位置
		for (int row = 0; row < rowCount; ++row) 
        {
			for (int col = 0; col < colCount; ++col) 
            {
                rotateData[(colCount - 1 - col) * rowCount + row] = data[row * colCount + col];

tilongzs

#include <opencv2/opencv.hpp>

/*
这个函数首先将QVector<ushort>转换为cv::Mat，然后计算缩放比例，并使用cv::resize函数进行缩放。然后，它创建一个新的输出矩阵，并将缩放后的图像复制到输出矩阵的中心。最后，它将结果转换回QVector<ushort>。
*/

void resizeImage(QVector<ushort>& input, QVector<ushort>& output, int inputWidth, int inputHeight, int outputWidth, int outputHeight, bool isKeepAspectRatio)
{
    // 将输入转换为OpenCV矩阵
    cv::Mat inputMat(inputHeight, inputWidth, CV_16U, input.data());

tilongzs

// QImage 转 Mat
// Qt读入彩色图后一般为Format_RGB32格式（4通道），而OpenCV一般用3通道的，因此进行了转换。
cv::Mat QImage2Mat(const QImage& image)
{
    cv::Mat mat;
    switch (image.format())
    {
    case QImage::Format_RGB32:  //一般Qt读入彩色图后为此格式
        mat = cv::Mat(image.height(), image.width(), CV_8UC4, (void*)image.constBits(), image.bytesPerLine());
        cv::cvtColor(mat,mat,cv::COLOR_BGRA2BGR);   //转3通道

tilongzs

#include "Components/SceneCaptureComponent2D.h"
#include "Engine/TextureRenderTarget2D.h"

void ProjectSceneCaptureToWorld(const class USceneCaptureComponent2D* sceneCaptureCompone2D, const FVector2D& sceneCapturePosition, FVector& worldPosition, FVector& worldDirection)
{
	// 计算视口矩阵
	const FTransform& transform = sceneCaptureCompone2D->GetComponentToWorld();
	FMatrix viewMatrix = transform.ToInverseMatrixWithScale();
	viewMatrix = viewMatrix * FMatrix(FPlane(0, 0, 1, 0), FPlane(1, 0, 0, 0), FPlane(0, 1, 0, 0), FPlane(0, 0, 0, 1));

tilongzs

static int setbit(int value, int position)
{
	return value | (1 << position);
}

static int clrbit(int value, int position)
{
	return value & ~(1 << position);
}

tilongzs

BOOL IsBigEndian()
{
　　union NUM
　　{
　　　　int a;
　　　　char b;
　　}num;
　　num.a = 0x1234;
　　if( num.b == 0x12 )
　　{

tilongzs

import 'package:flutter/material.dart';
/*
* 向上滑动时 导航栏能够滑出屏幕，当用户向下滑动时，导航栏能迅速回到屏幕
* 参考：https://book.flutterchina.club/chapter6/nestedscrollview.html#_6-12-3-sliverappbar
* */
void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {

tilongzs

#include <netcon.h>
// Enable/Disable Wireless connection programvatically
// https://forums.codeguru.com/showthread.php?404103-RESOLVED-Enable-Disable-Wireless-connection-programvatically

HRESULT DisableEnableConnections(BOOL bEnable)
{
    HRESULT hr = E_FAIL;

    CoInitialize(NULL);

tilongzs

#include <iostream>
#include <math.h>
using namespace std;

int main()
{
	int r = 20;
	for (int z = 0; z <= 2 * r; z += 2) {

		int x = (int)round(r - sqrt(r * r - (r - z) * (r - z)));