[积累]2种跟踪算法（内附演示）
[ 2004-12-04 02:43:59 | 发布: N神 ]
让enemy跟踪player，speed为enemy速度。
//-----------------------第一种---------------------------------------
//利用坐标
function genzong(enemy, player, speed) {
dx = player._x-enemy._x;
dy = player._y-enemy._y;
if (Math.abs(dx)>=speed) {
if (dx>=0) {
enemy._x += speed;
}
if (dx<0) {
enemy._x -= speed;
}
}
if (Math.abs(dy)>=speed) {
if (dy>=0) {
enemy._y += speed;
}
if (dy<=0) {
enemy._y -= speed;
}
}
}
_root.onEnterFrame = function() {
genzong(mc2, mc1, 5);
};
mc1.onMouseMove = function() {
this._x = _root._xmouse;
this._y = _root._ymouse;
updateAfterEvent();
};
dx = player._x-enemy._x;
dy = player._y-enemy._y;
if (Math.abs(dx)>=speed) {
if (dx>=0) {
enemy._x += speed;
}
if (dx<0) {
enemy._x -= speed;
}
}
if (Math.abs(dy)>=speed) {
if (dy>=0) {
enemy._y += speed;
}
if (dy<=0) {
enemy._y -= speed;
}
}
}
_root.onEnterFrame = function() {
genzong(mc2, mc1, 5);
};
mc1.onMouseMove = function() {
this._x = _root._xmouse;
this._y = _root._ymouse;
updateAfterEvent();
};
点这里 显示/隐藏 媒体//----------------------------------------------------第2种--------------------------
//利用三角函数
function genzong2(enemy, player, speed) {
dx = player._x-enemy._x;
dy = player._y-enemy._y;
distance = Math.sqrt((dx*dx)+(dy*dy));
if (speed<=distance) {
xspeed = speed*(dx/distance);
yspeed = speed*(dy/distance);
enemy._x += xspeed;
enemy._y += yspeed;
}
}
_root.onEnterFrame = function() {
genzong2(mc2, mc1, 5);
};
mc1.onMouseMove = function() {
this._x = _root._xmouse;
this._y = _root._ymouse;
updateAfterEvent();
};
dx = player._x-enemy._x;
dy = player._y-enemy._y;
distance = Math.sqrt((dx*dx)+(dy*dy));
if (speed<=distance) {
xspeed = speed*(dx/distance);
yspeed = speed*(dy/distance);
enemy._x += xspeed;
enemy._y += yspeed;
}
}
_root.onEnterFrame = function() {
genzong2(mc2, mc1, 5);
};
mc1.onMouseMove = function() {
this._x = _root._xmouse;
this._y = _root._ymouse;
updateAfterEvent();
};
[最后编辑于 N神, at 2005-06-07 01:33:36]
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