week16: (2)用按鍵控制鏡頭,有點動畫的感覺了!

float eyeX=0.3, eyeY=0.2, eyeZ=0.4, objX=0, objY=0, objZ=0, upX=0,upY=1,upZ=0;
// 注意!! 宣告一定要在 "使用" 之前, 不然程式會不認識, debug會出錯

if(key==' '){
 eyeX-=0.02; eyeY-=0.02;
}

gluLookAt(eyeX, eyeY, eyeZ, objX, objY, objZ, upX, upY, upZ);