# include <GL/glut.h> # include <stdlib.h> /* 初始化材料屬性、光源屬性、光照模型,打開深度緩衝區 */ void init ( void ) { GLfloat mat_specular [ ] = { 1.0, 1.0, 1.0, 1.0 }; GLfloat mat_shininess [ ] = { 50.0 }; GLfloat light_position [ ] = { 1.0, 1.0, 1.0, 0.0 }; glClearColor ( 0.0, 0.0, 0.0, 0.0 ); glShadeModel ( GL_SMOOTH ); glMaterialfv ( GL_FRONT, GL_SPECULAR, mat_specular); glMaterialfv ( GL_FRONT, GL_SHININESS, mat_shininess); glLightfv ( GL_LIGHT0, GL_POSITION, light_position); glEnable (GL_LIGHTING); glEnable (GL_LIGHT0); glEnable (GL_DEPTH_TEST); } /*調用GLUT函數,繪製一個球*/ void display ( void ) { glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glutSolidSphere (1.0, 40, 50); glFlush (); } /* 定義GLUT的reshape函數,w、h分別是當前窗口的寬和高*/ void reshape (int w, int h) { glViewport (0, 0, (GLsizei) w, (GLsizei) h); glMatrixMode (GL_PROJECTION); glLoadIdentity ( ); if (w <= h) glOrtho (-1.5, 1.5, -1.5 * ( GLfloat ) h / ( GLfloat ) w, 1.5 * ( GLfloat ) h / ( GLfloat ) w, -10.0, 10.0 ); else glOrtho (-1.5 * ( GLfloat ) w / ( GLfloat ) h, 1.5 * ( GLfloat ) w / ( GLfloat ) h, -1.5, 1.5, -10.0, 10.0); glMatrixMode ( GL_MODELVIEW ); glLoadIdentity ( ) ; } /* 定義對鍵盤的響應函數 */ void keyboard ( unsigned char key, int x, int y) { /*按Esc鍵退出*/ switch (key) { case 27: exit ( 0 ); break; } } int main(int argc, char** argv) { /* GLUT環境初始化*/ glutInit (&argc, argv); /* 顯示模式初始化 */ glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH); /* 定義窗口大小 */ glutInitWindowSize (300, 300); /* 定義窗口位置 */ glutInitWindowPosition (100, 100); /* 顯示窗口,窗口標題爲執行函數名 */ glutCreateWindow ( argv [ 0 ] ); /* 調用OpenGL初始化函數 */ init ( ); /* 註冊OpenGL繪圖函數 */ glutDisplayFunc ( display ); /* 註冊窗口大小改變時的響應函數 */ glutReshapeFunc ( reshape ); /* 註冊鍵盤響應函數 */ glutKeyboardFunc ( keyboard ); /* 進入GLUT消息循環,開始執行程序 */ glutMainLoop( ); return 0; }
編譯函數
gcc samplegl.c -o samplegl -lGL -lGLU -lglutoop
運行:code
./sampleglit