02160040_周子伍, Week13

今天做的是會從近拉到遠的選轉茶壺，覺得很帥很酷 !!!

程式碼如下:

#include <GL/glut.h>

float eyeX=-100, eyeY=80, eyeZ=-200;

void display()

{

    GLfloat pos[] = {0, 0, 200, 0};

    glLightfv(GL_LIGHT0, GL_POSITION, pos);

    glEnable(GL_LIGHT0);

    glEnable(GL_NORMALIZE);

    glEnable(GL_LIGHTING);

    glEnable(GL_DEPTH_TEST);

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

    gluLookAt(eyeX,eyeY,eyeZ, 0,0,0, 0,1,0);

    glPushMatrix();

    glutSolidTeapot(100);

    glPopMatrix();

    glPopMatrix();

    glFlush();

}

void motion(int x,int y)

{

    eyeX=x-400; eyeY=300-y;

    glutPostRedisplay();

}

void reshape(int w,int h)

{

    glViewport(0,0, w,h);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    gluPerspective(90, w/h, 0.001, 10000);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

}

void timer(int t)

{

    glutTimerFunc(20, timer, t+1);

    eyeX+=2;

    if(eyeX>300) eyeY+=4;

    glutPostRedisplay();

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutInitWindowSize(800,600);

    glutCreateWindow("3D");

    glutDisplayFunc(display);

    glutReshapeFunc(reshape);

    glutMotionFunc(motion);

    glutTimerFunc(0, timer, 0);

    glutMainLoop();

}