Week 16 03160233 黃孟盉

#include <stdio.h>
#include <GL/glut.h>

void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glutSolidTeapot(1);
    glPopMatrix();

    glutSwapBuffers();
}
void motion(int x,int y)
{
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(x/80.0,y/200.0,5,
              0,0,0,
              0,1,0);
    glutPostRedisplay();
}
void resize(int w,int h)
{
    glViewport(0,0,(GLsizei) w,(GLsizei) h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(65.0, (GLdouble) w/ h,1.0 ,1000.0);
    glMatrixMode (GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(0.0,0.0,5.0,
             0.0,0.0,0.0,
             0.0,1.0,0.0);
}
int main(int argc,char**argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("camera");
    glutDisplayFunc(display);
    glutMotionFunc(motion);
    glutReshapeFunc(resize);
    glutMainLoop();
}