Question

我想建立一个刺激射弹运动行为的程序。我检查了正确的坐标（x，y），但是编译器没有在正确的坐标处打印，导致倒置的抛射物运动（像运动一样摆动）文件“myconsole.h”工作正常我已单独检查。这是我的代码：

#include <iostream>
#include <cmath>
#include <windows.h>
#include "myconsole.h"
using namespace std;

int coordinate(int theta, float v, float g, float initialheight, float x)     //function to calculate y coordinate. it accepts x and produces y
{
    float  y = ((initialheight + (x * tan(theta))) - (( g * (x * x))/(2 * (powf((v * cos(theta)), 2)))));//formula
    return y;
}
int main()
{
    float initialheight = 0;
    int  y = 0;
    int x = 0;
    float v = 0;
    int theta =0;
    float g = 9.81;
    cout<<"Enter the following Information"<<endl;
    cout<<"Angle (theta) = ";
    cin>>theta;
    cout<<"Initial Velocity (V) = ";
    cin>>v;
    cout<<"Initial height = ";
    cin>>initialheight;

        float sq = 2*g*initialheight;//just for simplification
        float sqroot = powf(v * (sin(theta)), 2);//just for simplification
    float d = ((v * (cos(theta))/g)*((v * (sin(theta))+ sqrt(sqroot + sq))));
    /*equation to calculate total distance covered
    by the projectile. I started x from 0 and add 1 to it till it reaches d.for every value of x we get the 
    corisponding value of y from function coordinate.*/

    ClearScreen();
    while(x <= d)//loop to increment x

        {
            y = coordinate(theta, v, g, initialheight, x);

            PlaceCursor(x, y);   //using function from console.h and placing the cursor at (x, y) position
            cout<<"*";

            /*although the coordinates are stimulating the correct behavior of projectile but "* " are printing 
            an inverted projectile*/

            x++;
        }
        system("pause");
        return 0 ;
}

Answer 1

我相信控制台窗口的坐标系从左上角的0,0开始，y增加 down 窗口。你的代码是正确的，图表本身是反转的，因为这是协调的工作方式。

我改变了你的代码，以获得理想的结果：

CONSOLE_SCREEN_BUFFER_INFO csbiInfo; 
HANDLE hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
GetConsoleScreenBufferInfo (hStdout, &csbiInfo);
int winheight = csbiInfo.dwSize.Y ;

system("cls");
while(x <= d)//loop to increment x

    {
        y = coordinate(theta, v, g, initialheight, x);

        COORD pos;
        pos.X = x;
        pos.Y = winheight -y; 
        SetConsoleCursorPosition(hStdout, pos);

        cout<<"*";

Answer 2

如果没有编码，就应该修复它，将重力值更改为等式中的负值，因为它向你的射弹方向拉动。

虽然坐标是正确的，程序不是在正确的点打印

2 个答案: