1. Community Home
  2. Programming

Open gl- Random Pixel on full screen

  • nidhi#123
    Likes 0
    Problem Description

    the problem is that on open gl and on full screen i need to render random pixel.

    x and y – the size of screen

    r=rand()/RAND_MAX

    if(r>0.5)

    render pixel – white

    else render pixel black

    ……………………………………………………………

    i done this in normal c++ as follows but need to do same in opengl

     

    #include "graphics.h"
    #include <stdlib.h>
    #include <dos.h>
    #include <windows.h>
    #include <iostream>
    using namespace std;
    double r;
    void randpixel(DWORD *h, DWORD  *w, int *k)
    {
     
    int i, j;
    cout << endl << "FOR ITERATION NO " << *k + 1 << endl;
    for (i = 0; i < *w; i++)
    {
    for (j = 0; j < *h; j++)
    {
    r = (double)rand() / RAND_MAX;
    if (r > 0.5)
    {
     
    putpixel(i, j, BLACK);
    }
    else
    {
     
    putpixel(i, j, WHITE);
    }
    }
    }
    }
    int main()
    {
    int n, k = 0;
     
    DWORD w = GetSystemMetrics(SM_CXSCREEN);
    DWORD h = GetSystemMetrics(SM_CYSCREEN);
    cout << "Width: " << w << " Height: " << h << endl;
    cout << "How many times you want to iteration? ";
    cin >> n;
    initwindow(w, h, "" , -3,-3);
    do {
    randpixel(&h, &w, &k);
    k++;
    Sleep(5000);
    } while (k < n);
     
    getch();
    return 0;
    }
     

     

  • Sonar Systems admin
    Likes 0

    Can you show me

Login to reply