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风雨中的树—as效果的实际应用
风雨中的树——as效果的实际应用
数学公式是自然美的原型？：）
这个程序是以前做的，很不完善。分下面几块
1.造雨：
amount = _parent.strong*2;
j = amount/40;
//雨量控制
drop._visible = false;
do {
duplicatemovieclip("drop", "d"+i, i);
setproperty("d"+i, _x, random(800)-100);
setproperty("d"+i, _y, random(50));
setproperty("d"+i, _xscale, 30+random(70));
setproperty("d"+i, _yscale, 70+random(40));
setproperty("d"+i, _alpha, random(50)+35);
i1 = i-200;
removemovieclip("d"+i1);
i = i+1;
j = j-1;
} while (j>=0);
//制造随机的雨
2.造风
onclipevent (load) {
t0 = gettimer();
tt0 = gettimer();
tinterval = 10000;
interval = 1000;
wind = new sound("windsound");
rain = new sound("rainsound");
}
onclipevent (enterframe) {
t1 = gettimer();
t = t1-t0;
tt = t1-tt0;
if (tt>=tinterval) {
tt0 = gettimer();
}
if (t>=interval) {
strong = 20+random(9)*10;
rain.setvolume(strong);
direction = random(2);
if (direction == 1) {
pan = strong;
} else {
if (direction == 0) {
pan = -strong;
}
}
wind.setpan(pan);
volume = 0;
wind.setvolume(volume);
windsound.gotoandplay("start");
t0 = gettimer();
tt0 = gettimer();
interval = strong*100;
}
now = math.sin(((1-(t/interval)*2)*math.pi)/2);
//from 1~-1
if (direction == 1) {
pan = strong*now;
} else {
if (direction == 0) {
pan = -strong*now;
}
}
wind.setpan(pan);
if (t>=interval/2) {
volume = strong*(now+1);
} else {
if (t<=100) {
volume = 0;
} else {
if (t<=interval/2) {
volume = strong*(1-now);
}
}
}
if (volume<0) {
volume = 0;
windsound.gotoandstop("stop");
}
wind.setvolume(volume);
if (direction == 1) {
setproperty("rain.drop", _rotation, -volume/3);
} else {
if (direction == 0) {
setproperty("rain.drop", _rotation, volume/3);
}
}
}
3.树的摇摆
onclipevent (enterframe) {
nowt = (math.sin(((1-(tt/tinterval)*2)*math.pi*math.exp(t/interval))*2)*math.exp((-t/interval)*5);
//周期衰变大阻尼震荡
direction = _parent.direction;
if (direction == 1) {
_rotation = -nowt*40;
} else {
if (direction == 0) {
_rotation = nowt*40;
}
}
}
