如果只有這些子彈强品，那看起來(lái)必然是很一般的，想想看屈糊，只有幾顆子彈的榛，孤零零的從下面跑到上面。逻锐。夫晌。。昧诱。
GameBarrage彈幕類晓淀，用于創(chuàng)建一些酷炫叼的彈幕其實(shí)核心也就是通過(guò)一些數(shù)學(xué)公式，然后批量AddBullet而已
先來(lái)看看類型的定義
public enum BarrageType
{
Line,
RotateAndShoot,
CrossLine,
Circle
}
初步就這四種盏档，其余的彈幕類型都可以通過(guò)這幾種組合出來(lái)
然后就是彈幕的具體實(shí)現(xiàn)
public class GameBarrage
{
private GameScene mScene;
public GameBarrage(GameScene scene)
{
this.mScene = scene;
}
/// <summary>
/// 圓形彈幕
/// </summary>
/// <param name="isOwn">是否為玩家子彈</param>
/// <param name="type">子彈類型</param>
/// <param name="color">子彈顏色</param>
/// <param name="position">中心點(diǎn)位置</param>
/// <param name="speed">子彈移動(dòng)速度</param>
/// <param name="accel">子彈移動(dòng)加速度</param>
/// <param name="interval">每顆子彈的角度間隔</param>
/// <param name="delay">延遲發(fā)射時(shí)間</param>
public void CreateCircle(bool isOwn, int type, int color, Vector2 position, float speed, float accel, int interval, float delay)
{
int angle = 0;
while (angle < 360)
{
mScene.AddBullet(new GameBullet(isOwn, position, Helper.GetSpeedWithAngle(angle, speed), Helper.GetSpeedWithAngle(angle, accel), type, color, delay));
angle += interval;
}
}
/// <summary>
/// 扇形彈幕
/// </summary>
/// <param name="isOwn">是否為玩家子彈</param>
/// <param name="type">子彈類型</param>
/// <param name="color">子彈顏色</param>
/// <param name="position">中心點(diǎn)的位置</param>
/// <param name="startAngle">扇形的起始角度（向右為0°）</param>
/// <param name="endAngle">扇形的結(jié)束角度（順時(shí)針）</param>
/// <param name="speed">子彈移動(dòng)速度</param>
/// <param name="accel">子彈移動(dòng)加速度</param>
/// <param name="interval">每顆子彈的角度間隔</param>
/// <param name="duration">發(fā)射持續(xù)時(shí)間（為0表示瞬間發(fā)射所有）</param>
/// <param name="delay">延遲發(fā)射時(shí)間</param>
public void CreateRotateAndShoot(bool isOwn, int type, int color, Vector2 position, int startAngle, int endAngle, float speed, float accel, int interval, float duration, float delay)
{
int count = startAngle;
int angle = Math.Abs(endAngle - startAngle);
float wait = duration / (float)angle;
if ( endAngle > startAngle )
{
while (count < endAngle)
{
mScene.AddBullet(new GameBullet(isOwn, position, Helper.GetSpeedWithAngle(count, speed), Helper.GetSpeedWithAngle(count, accel), type, color, (count - startAngle) * wait + delay ));
count += interval;
}
}
else
{
while (count > endAngle)
{
mScene.AddBullet(new GameBullet(isOwn, position, Helper.GetSpeedWithAngle(count, speed), Helper.GetSpeedWithAngle(count, accel), type, color, (startAngle - count) * wait + delay ));
count += interval;
}
}
}
/// <summary>
/// 直線交叉彈幕
/// </summary>
/// <param name="isOwn">是否為玩家子彈</param>
/// <param name="type">子彈類型</param>
/// <param name="color">子彈顏色</param>
/// <param name="spawnCount">子彈數(shù)量</param>
/// <param name="beginPos1">開始地點(diǎn)一</param>
/// <param name="beginPos2">開始地點(diǎn)二</param>
/// <param name="crossPos">交叉點(diǎn)</param>
/// <param name="speed">子彈移動(dòng)速度</param>
/// <param name="accel">子彈移動(dòng)加速度</param>
/// <param name="duration">發(fā)射持續(xù)時(shí)間（為0表示瞬間發(fā)射所有）</param>
/// <param name="delay">延遲發(fā)射時(shí)間</param>
public void CreateCrossLine(bool isOwn, int type, int color, int spawnCount, Vector2 beginPos1, Vector2 beginPos2, Vector2 crossPos, float speed, float accel, float duration, float delay)
{
int count = 0;
float wait = duration / (float)spawnCount;
while (count < spawnCount)
{
mScene.AddBullet(new GameBullet(isOwn, beginPos1,
Helper.GetSpeedWithPosition(beginPos1, crossPos, speed), Helper.GetSpeedWithPosition(beginPos1, crossPos, accel),
type, color,
wait * count + delay));
mScene.AddBullet(new GameBullet(isOwn, beginPos2,
Helper.GetSpeedWithPosition(beginPos2, crossPos, speed), Helper.GetSpeedWithPosition(beginPos2, crossPos, accel),
type, color,
wait * count + delay));
count++;
}
}
/// <summary>
/// 直線彈幕
/// </summary>
/// <param name="isOwn">是否為玩家子彈</param>
/// <param name="type">子彈類型</param>
/// <param name="color">子彈顏色</param>
/// <param name="spawnCount">子彈數(shù)量</param>
/// <param name="startPos">開始地點(diǎn)</param>
/// <param name="targetPos">目標(biāo)地點(diǎn)（用于確定方向而已）</param>
/// <param name="speed">子彈移動(dòng)速度</param>
/// <param name="accel">子彈移動(dòng)加速度</param>
/// <param name="duration">發(fā)射持續(xù)時(shí)間</param>
/// <param name="delay">延遲發(fā)射時(shí)間</param>
public void CreateLine(bool isOwn, int type, int color, int spawnCount, Vector2 startPos, Vector2 targetPos, float speed, float accel, float duration, float delay)
{
int count = 0;
float wait = duration / (float)spawnCount;
while (count < spawnCount)
{
mScene.AddBullet(new GameBullet(isOwn, startPos,
Helper.GetSpeedWithPosition(startPos, targetPos, speed), Helper.GetSpeedWithPosition(startPos, targetPos, accel),
type, color,
wait * count + delay));
count++;
}
}
/// <summary>
/// 隨機(jī)彈幕
/// </summary>
/// <param name="isOwn">是否為玩家子彈</param>
/// <param name="type">子彈類型</param>
/// <param name="color">子彈顏色</param>
/// <param name="spawnCount">子彈數(shù)量</param>
/// <param name="boundary">子彈范圍</param>
/// <param name="speed">子彈速度（包括方向）</param>
/// <param name="accel">子彈加速度（包括方向）</param>
/// <param name="duration">發(fā)射持續(xù)時(shí)間（為0表示瞬間發(fā)射所有）</param>
/// <param name="delay">延遲發(fā)射時(shí)間</param>
public void CreateRandom(bool isOwn, int type, int color, int spawnCount, RangeBox boundary, RangeVector speed, RangeVector accel, float duration, float delay)
{
int count = 0;
float wait = duration / (float)spawnCount;
while (count < spawnCount)
{
Vector2 sp = speed.Get();
Vector2 dir = sp;
dir.Normalize();
mScene.AddBullet(new GameBullet(isOwn, boundary.Get(), sp, dir * accel.Get(), type, color, count * wait + delay));
count++;
}
}
}
就來(lái)圓形彈幕來(lái)講解吧凶掰。
首先大家可以看看前面GameBullet，有個(gè)字段是用于延遲顯示的（就是說(shuō)子彈已經(jīng)添加了，只是必須要等到規(guī)定時(shí)間過(guò)去才能顯示出來(lái)）
解析來(lái)看具體的實(shí)現(xiàn)
public void CreateCircle(bool isOwn, int type, int color, Vector2 position, float speed, float accel, int interval, float delay)
{
int angle = 0;
while (angle < 360)
{
mScene.AddBullet(new GameBullet(isOwn, position, Helper.GetSpeedWithAngle(angle, speed), Helper.GetSpeedWithAngle(angle, accel), type, color, delay));
angle += interval;
}
}
核心思想就是通過(guò)“極坐標(biāo)公式”算出不同角度對(duì)應(yīng)的坐標(biāo)懦窘，然后生成子彈
具體的計(jì)算就是Helper.GetSpeedWithAngle前翎，這個(gè)忘記的可以看前面章節(jié)，有寫~
通過(guò)累加angle畅涂，循環(huán)360°港华，然后計(jì)算出不同角度的速度方向和延遲就能創(chuàng)建圓形彈幕了
再來(lái)一個(gè)用的最多的扇形彈幕
public void CreateRotateAndShoot(bool isOwn, int type, int color, Vector2 position, int startAngle, int endAngle, float speed, float accel, int interval, float duration, float delay)
{
int count = startAngle;
int angle = Math.Abs(endAngle - startAngle);
float wait = duration / (float)angle;
if ( endAngle > startAngle )
{
while (count < endAngle)
{
mScene.AddBullet(new GameBullet(isOwn, position, Helper.GetSpeedWithAngle(count, speed), Helper.GetSpeedWithAngle(count, accel), type, color, (count - startAngle) * wait + delay ));
count += interval;
}
}
else
{
while (count > endAngle)
{
mScene.AddBullet(new GameBullet(isOwn, position, Helper.GetSpeedWithAngle(count, speed), Helper.GetSpeedWithAngle(count, accel), type, color, (startAngle - count) * wait + delay ));
count += interval;
}
}
}
原理和上面類似，只是需要注意的是時(shí)間延遲傳遞的是 (startAngle-Count)*wait+delay
其實(shí)就是通過(guò)計(jì)算出需要產(chǎn)生的子彈數(shù)量已經(jīng)總的延遲午衰，然后算出每一個(gè)子彈的延遲時(shí)間立宜。
這樣的效果就是，瞬間產(chǎn)生了一堆子彈苇经，但是看到的是一個(gè)個(gè)顯示出來(lái)赘理，有一種旋轉(zhuǎn)著發(fā)射子彈的感覺宦言。扇单。。表達(dá)不好奠旺。蜘澜。
有了這個(gè)東西，就可以看看 BOSS彈幕的生成了响疚，其實(shí)就是用了這些函數(shù)而已
public static class BossBarrage
{
/// <summary>
/// 花瓣型彈幕
/// </summary>
/// <param name="barrage"></param>
/// <param name="position"></param>
/// <returns>彈幕持續(xù)8秒</returns>
public static int Petal(GameBarrage barrage, Vector2 position)
{
barrage.CreateRotateAndShoot(false, 0, 0, position, 0, 300, 300, -350, 5, 8, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 30, 330, 300, -350, 5, 8, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 60, 360, 300, -350, 5, 8, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 90, 390, 300, -350, 5, 8, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 120, 420, 300, -350, 5, 8, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 150, 450, 300, -350, 5, 8, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 180, 480, 300, -350, 5, 8, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 210, 510, 300, -350, 5, 8, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 240, 540, 300, -350, 5, 8, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 270, 570, 300, -350, 5, 8, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 300, 600, 300, -350, 5, 8, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 330, 630, 300, -350, 5, 8, 0);
return 8;
}
/// <summary>
/// 直線型彈幕
/// </summary>
/// <param name="barrage"></param>
/// <returns>彈幕持續(xù)5秒</returns>
public static int Line(GameBarrage barrage)
{
barrage.CreateLine(false, 0, 0, 50, new Vector2(25, 0), new Vector2(25, 400), 100, 0, 15, 0);
barrage.CreateLine(false, 0, 1, 50, new Vector2(75, 0), new Vector2(75, 400), 100, 0, 15, 0);
barrage.CreateLine(false, 0, 2, 50, new Vector2(125, 0), new Vector2(125, 400), 100, 0, 15, 0);
barrage.CreateLine(false, 0, 3, 50, new Vector2(175, 0), new Vector2(175, 400), 100, 0, 15, 0);
barrage.CreateLine(false, 0, 4, 50, new Vector2(225, 0), new Vector2(225, 400), 100, 0, 15, 0);
barrage.CreateLine(false, 0, 5, 50, new Vector2(275, 0), new Vector2(275, 400), 100, 0, 15, 0);
barrage.CreateLine(false, 0, 6, 50, new Vector2(325, 0), new Vector2(325, 400), 100, 0, 15, 0);
barrage.CreateLine(false, 0, 0, 50, new Vector2(375, 0), new Vector2(375, 400), 100, 0, 15, 0);
return 5;
}
/// <summary>
/// 連續(xù)兩撥錯(cuò)開的扇形彈幕
/// </summary>
/// <param name="barrage"></param>
/// <param name="position"></param>
/// <returns>彈幕持續(xù)時(shí)間2秒</returns>
public static int TwoFans(GameBarrage barrage, Vector2 position)
{
barrage.CreateRotateAndShoot(false, 0, 0, position, 45, 135, 300, 0, 5, 0, 0);
barrage.CreateRotateAndShoot(false, 0, 0, position, 43, 143, 300, 0, 5, 0, 0.1f);
return 2;
}
/// <summary>
/// 左右兩邊出現(xiàn)相反的漩渦型彈幕
/// </summary>
/// <param name="barrage"></param>
/// <param name="position"></param>
/// <returns>彈幕持續(xù)時(shí)間4秒</returns>
public static int TwoReverseRotate(GameBarrage barrage, Vector2 position)
{
barrage.CreateRotateAndShoot(false, 2, 0, new Vector2(50, position.Y), 0, 180, 350, -80, 8, 1, 0);
barrage.CreateRotateAndShoot(false, 2, 4, new Vector2(50, position.Y), 90, 270, 350, -80, 8, 1, 0);
barrage.CreateRotateAndShoot(false, 2, 0, new Vector2(50, position.Y), 180, 360, 350, -80, 8, 1, 0);
barrage.CreateRotateAndShoot(false, 2, 4, new Vector2(50, position.Y), 270, 450, 350, -80, 8, 1, 0);
barrage.CreateRotateAndShoot(false, 2, 0, new Vector2(350, position.Y), 180, 0, 350, -80, -8, 1, 0);
barrage.CreateRotateAndShoot(false, 2, 4, new Vector2(350, position.Y), 270, 90, 350, -80, -8, 1, 0);
barrage.CreateRotateAndShoot(false, 2, 0, new Vector2(350, position.Y), 360, 180, 350, -80, -8, 1, 0);
barrage.CreateRotateAndShoot(false, 2, 4, new Vector2(350, position.Y), 450, 270, 350, -80, -8, 1, 0);
return 4;
}
/// <summary>
/// 三個(gè)園型彈幕
/// </summary>
/// <param name="barrage"></param>
/// <param name="position"></param>
/// <returns>彈幕持續(xù)時(shí)間5秒</returns>
public static int ThreeCircle(GameBarrage barrage, Vector2 position)
{
barrage.CreateCircle(false, 0, 0, position, 250, 0, 10, 0);
barrage.CreateCircle(false, 0, 1, position + new Vector2(-100, 50), 250, 0, 10, 0);
barrage.CreateCircle(false, 0, 2, position + new Vector2(100, 50), 250, 0, 10, 0);
barrage.CreateCircle(false, 0, 3, position, 250, 0, 10, 0.5f);
barrage.CreateCircle(false, 0, 4, position + new Vector2(-100, 50), 250, 0, 10, 0.5f);
barrage.CreateCircle(false, 0, 5, position + new Vector2(100, 50), 250, 0, 10, 0.5f);
return 5;
}
}
代碼很多鄙信，只是通過(guò)一些數(shù)學(xué)計(jì)算，產(chǎn)生不同效果而已大家可以自由發(fā)揮
