Learning Modern OpenGL with C++ (in Computer Graphics)-Part 2

In Previous Part we Introduce Computer Graphics, OpenGL, GLEW and GLFW
rajkumarpatil.hashnode.dev/learning-modern-..

In this part we are going to Setup and do Basic code(OpenGL) in C++

Setting Up GLEW and GLFW for Windows System

• First download Visual studio Community visualstudio.microsoft.com/downloads
• Install Visual Studio (Desktop Development with c++) docs.microsoft.com/en-us/visualstudio/insta..
• Download GLEW glew.sourceforge.net
• Download GLFW glfw.org/download

Two Ways to Setup

First Way

• Follow the YouTube Link youtu.be/gCkcP0GcCe0

Second Way

1. Extract both GLEW and GLFW zip file to new folder Name GLEW and GLFW respectively.
2. Find Install folder of Microsoft Visual Studio (By default it is C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\VS )
3. Go to Community\VC\Auxiliary\VS\include
4. Copy folder GL (GLEW-extracted) from GLEW\include to Community\VC\Auxiliary\VS\include
5. Copy all libraries from Extracted GLEW(GLEW\lib\Release\Win32) and GLFW(GLFW\lib-vc2019(select according to version of VS)) to Community\VC\Auxiliary\VS\lib
6. Open Visual Studio Create a blank c++ project.(I had name Morden_World_OpenGL )
7. Paste GLEW\bin\Release\Win32*glew32.dll* to Project Folder.

Basic Code in C++

#include<iostream>
#include<conio.h>
using namespace std;
#include<GL/glew.h>
#include<GLFW/glfw3.h>
const GLint WIDTH = 800, HEIGHT= 600 ;
int main() {
    //Initialization of GLFW
    if (!glfwInit()) {
        cout << "Error in Initialization of glfwInit()";
        glfwTerminate();     // Terminate if error one created
        return 1;
    }
    // Setup GLFW Windows Properties -- openGL version
    glfwInitHint(GLFW_CONTEXT_VERSION_MAJOR, 3);    // We are using version 3.3 3(Major).3(Minor)
    glfwInitHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    // Core Profile No backward compatiblity
    glfwInitHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
    // Allow forward compatiblity
    glfwInitHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);

    GLFWwindow* mainWindow = glfwCreateWindow(WIDTH, HEIGHT, "Mordern World openGL Window", NULL, NULL);
    if (!mainWindow) {
        cout << "GLFW Window is not Created There is some Error";
        glfwTerminate();
        return 1;
    }
    //Get Buffer Size Information
    int bWidth, bHeight;
    glfwGetFramebufferSize(mainWindow, &bWidth, &bHeight);
    //Seting Contex for GLEW to use
    glfwMakeContextCurrent(mainWindow);
    // Add or Allow Mordern Extension
    glewExperimental = GL_TRUE;

    //Initialization of GLEW
    if (glewInit() != GLEW_OK) { //glewInit() Function retrun GLEW_OK in success 
        cout << "Error in GLEW Initialization ";
        glfwDestroyWindow(mainWindow);
        glfwTerminate();
        return 1;
    }
    //Setup Viewport
    glViewport(0, 0, bWidth, bHeight);
    //loop for window until we close
    while (!glfwWindowShouldClose(mainWindow)) {

        // Handle user input event
        glfwPollEvents();
        //clear Window
        glClearColor(0.0f, 1.0f, 0.0f, 1.0f); // Green Color Window will display (R=0, G=1, B=0)  
        glClear(GL_COLOR_BUFFER_BIT);
        glfwSwapBuffers(mainWindow);
    }
    return 0;
}

Output