02160305_邱俊澄_Week13

建立800*600的視窗

視窗縮放茶壺不會變形

透視投影

#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("3DDDD");
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMotionFunc(motion);
    glutTimerFunc(0,timer,0);

    glutMainLoop();
}