主题：实验1——OpenGL初识（计算机图形学（OpenGL版））
代码1：
1 #include <GL/glut.h> 2 3 void myDisplay(void){ 4 5 glClearColor(0.0,0.0,0.0,0.0); 6 glClear(GL_COLOR_BUFFER_BIT); 7 8 glColor3f(1.0f,1.0f,1.0f); 9 glRectf(-0.5f,-0.5f,0.5f,0.5f); 10 11 glBegin (GL_TRIANGLES); 12 glColor3f(1.0f,0.0f,0.0f);glVertex2f(0.0f,1.0f); 13 glColor3f(0.0f,1.0f,0.0f);glVertex2f(0.8f,-0.5f); 14 glColor3f(0.0f,0.0f,1.0f);glVertex2f(-0.8f,-0.5f); 15 glEnd(); 16 17 glPointSize(3); 18 19 glBegin(GL_POINTS); 20 21 glColor3f(1.0f,0.0f,0.0f);glVertex2f(-0.4f,-0.4f); 22 glColor3f(0.0f,1.0f,0.0f);glVertex2f(0.0f,0.0f); 23 glColor3f(0.0f,0.0f,1.0f);glVertex2f(0.4f,0.4f); 24 25 glEnd(); 26 27 28 glFlush(); 29 30 31 } 32 33 int main(int argc,char *argv[]){ 34 glutInit(&argc,argv); 35 glutInitDisplayMode(GLUT_RGB|GLUT_SINGLE); 36 glutInitWindowPosition(100,100); 37 glutInitWindowSize(400,400); 38 glutCreateWindow("Hello World!"); 39 glutDisplayFunc(&myDisplay); 40 glutMainLoop(); 41 return 0; 42 43 }
运行结果：
代码2：
1 #include <GL/glut.h> 2 3 void myDisplay(void){ 4 5 glClearColor(0.0,0.0,0.0,0.0); 6 glClear(GL_COLOR_BUFFER_BIT); 7 8 glColor3f(1.0f,1.0f,1.0f); 9 glRectf(-0.5f,-0.5f,0.5f,0.5f); 10 11 glBegin (GL_TRIANGLES); 12 glColor3f(1.0f,0.0f,0.0f);glVertex2f(0.0f,1.0f); 13 glColor3f(0.0f,1.0f,0.0f);glVertex2f(0.8f,-0.5f); 14 glColor3f(0.0f,0.0f,1.0f);glVertex2f(-0.8f,-0.5f); 15 glEnd(); 16 17 glPointSize(3); 18 19 glBegin(GL_POINTS); 20 21 glColor3f(1.0f,0.0f,0.0f);glVertex2f(-0.4f,-0.4f); 22 glColor3f(0.0f,1.0f,0.0f);glVertex2f(0.0f,0.0f); 23 glColor3f(0.0f,0.0f,1.0f);glVertex2f(0.4f,0.4f); 24 25 glEnd(); 26 27 28 glBegin(GL_LINE_LOOP); 29 30 glColor3f(1.0f,1.0f,1.0f);glVertex2f(0.4f,0.25f); 31 glColor3f(1.0f,1.0f,1.0f);glVertex2f(0.0f,-0.5f); 32 glColor3f(1.0f,1.0f,1.0f);glVertex2f(-0.4f,0.25f); 33 34 glEnd(); 35 36 glFlush(); 37 38 39 } 40 41 int main(int argc,char *argv[]){ 42 glutInit(&argc,argv); 43 glutInitDisplayMode(GLUT_RGB|GLUT_SINGLE); 44 glutInitWindowPosition(100,100); 45 glutInitWindowSize(400,400); 46 glutCreateWindow("Hello World!"); 47 glutDisplayFunc(&myDisplay); 48 glutMainLoop(); 49 return 0; 50 51 }
运行结果：
