[筆記]OpenGL

/**************************

 * Includes
 *
 **************************/

#include "windows.h"
#include "gl/gl.h"
#include "gl/glut.h"
#include "gl/glu.h"
void init(void)
{
     glClearColor(1.0,1.0,1.0,0.0); //背景顏色:白
     glMatrixMode(GL_PROJECTION); //投影模式
     gluOrtho2D(0.0,100.0,0.0,150.0); //宣告視窗大小
}

void lineSegement(void)
{
     glClear(GL_COLOR_BUFFER_BIT);//清除顯示視窗
        glColor3f(0.1,0.0,0.3);
     glBegin(GL_LINES);
        glVertex2i(180,15);
        glVertex2i(10,145);
     glEnd();

     glFlush();
}

int main(int argc,char**argv)
{
 glutInit(&argc,argv);//初始GLUT
 glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);//設定顯示模式
 glutInitWindowPosition(50,100);
 glutInitWindowSize(400,300);
 glutCreateWindow("CJ OpenGL program 01");

 init();
 glutDisplayFunc(lineSegement);
 glutMainLoop();       
    }