Ubuntu 16.04에서 OpenGL( freeGLUT ) 프로그래밍

설치

$ sudo apt-get install freeglut3-dev

예제 코드 컴파일

$ gcc test.c -lglut -lGL -lGLU

실행결과

visual studio code에서 컴파일 및 실행하기

visual studio code 설치는 다음 글을 참고하세요..

[리눅스/개발환경] - Ubuntu Linux에 Visual Studio Code 설치해서 C/C++컴파일 해보기

설치 완료 후, tasks.json파일에서 아래 빨간색으로 된 부분만 수정하시면 됩니다.

{
   "version": "0.1.0",
   "command": "bash",
   "isShellCommand": true,
   "args": ["-c"],
   "tasks": [
       {
           "taskName": "saveNcompile",
           "suppressTaskName": true,
           "isBuildCommand": true,
           "args": ["gcc main.c -lglut -lGL -lGLU -o main"]
       }, {
           "taskName": "execute",
           "suppressTaskName": true,
           "isTestCommand": true,
           "args": ["gnome-terminal -e \"bash -ic  ./main;bash \""]
       }
   ]
}

예제코드

출처 - http://www.lighthouse3d.com/tutorials/glut-tutorial/animation/

#include "GL/freeglut.h"
 
 
void changeSize(int w, int h) {
 
    // Prevent a divide by zero, when window is too short
    // (you cant make a window of zero width).
    if (h == 0)
        h = 1;
 
    float ratio = w * 1.0 / h;
 
    // Use the Projection Matrix
    glMatrixMode(GL_PROJECTION);
 
    // Reset Matrix
    glLoadIdentity();
 
    // Set the viewport to be the entire window
    glViewport(0, 0, w, h);
 
    // Set the correct perspective.
    gluPerspective(45.0f, ratio, 0.1f, 100.0f);
 
    // Get Back to the Modelview
    glMatrixMode(GL_MODELVIEW);
}
 
float angle = 0.0f;
 
void renderScene(void) {
 
    // Clear Color and Depth Buffers
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
    // Reset transformations
    glLoadIdentity();
    // Set the camera
    gluLookAt(0.0f, 0.0f, 10.0f,
        0.0f, 0.0f, 0.0f,
        0.0f, 1.0f, 0.0f);
 
    glRotatef(angle, 0.0f, 1.0f, 0.0f);
 
    glBegin(GL_TRIANGLES);
    glVertex3f(-2.0f, -2.0f, 0.0f);
    glVertex3f(2.0f, 0.0f, 0.0);
    glVertex3f(0.0f, 2.0f, 0.0);
    glEnd();
 
    angle += 0.1f;
 
    glutSwapBuffers();
}
 
int main(int argc, char **argv) {
 
    // init GLUT and create window
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(320, 320);
    glutCreateWindow("Lighthouse3D- GLUT Tutorial");
 
    // register callbacks
    glutDisplayFunc(renderScene);
    glutReshapeFunc(changeSize);
    glutIdleFunc(renderScene);
 
    // enter GLUT event processing cycle
    glutMainLoop();
 
    return 1;
}