< 沒有人 又在轉了 沒有人>

#include <GL/glut.h>
const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_position[] = { 2.0f, 5.0f, -5.0f, 0.0f };
const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };
const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };
const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat high_shininess[] = { 100.0f };

int type=1;
float teapotX=0,teapotY=0;
float teapotRotY=0;
int oldx=0,oldy=0;
void mouse (int button,int state, int x,int y)
{
    oldx=x;
    oldy=y;
}
void motion(int x,int y)
{
    if(type==1)
    {
        teapotRotY+=x-oldx;
    }
    else if(type==2)
    {
        teapotX+=x-oldx;
        teapotY+=y-oldy;
    }
    oldx=x;
    oldy=y;
    glutPostRedisplay();
}
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glTranslatef(teapotX/150.0,-teapotY/150.0,0);
        glRotatef(teapotRotY,0,-1,0);
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
    teapotRotY+=3;
}
#include <stdio.h>
void keybroad(unsigned char key,int x, int y)
{
    if(key=='e' || key=='E') type=1;
    if(key=='w' || key=='W') type=2;
    printf("now: %c\n",key);
}
int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("GLUT Shapes");


    glutDisplayFunc(display);
    glutMouseFunc(mouse);
    glutMotionFunc(motion);
    glutKeyboardFunc(keybroad);
    glutIdleFunc(display);


    glEnable(GL_DEPTH_TEST);
    glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);
    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
    glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);
    glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
    glutMainLoop();
    return EXIT_SUCCESS;
}

讓茶壺可以自己轉

把teapotRotY去掉可以手控轉