Created
December 1, 2009 03:46
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| /** | |
| * Yet another DANMAKU #1 rev2 | |
| * =========================== | |
| * Bullets now reflect @ walls! | |
| * | |
| * This sample assigns bullet objects every time when new bullets are | |
| * needed. Creating a new bullet costs much, we'd better find an another | |
| * way to manage bullets. | |
| */ | |
| ArrayList bullets; | |
| float launchDegree = 90; | |
| float launchDegreeDelta = 3.6; | |
| float OUT_OF_BOUND_MERGIN = 50.0; | |
| /////////////////////////////////////////////////////////// | |
| void setup() { | |
| size(400, 400); | |
| smooth(); | |
| frameRate(30); | |
| bullets = new ArrayList(1024); | |
| } | |
| void draw() { | |
| background(238); | |
| { | |
| Bullet bullet = null; | |
| { | |
| bullet = new Bullet(width/2, 20); | |
| bullet.setSpeed(4.0, launchDegree); | |
| bullets.add(bullet); | |
| } | |
| { | |
| bullet = new Bullet(width/2, 20); | |
| bullet.setSpeed(3.6, launchDegree+3); | |
| bullets.add(bullet); | |
| } | |
| { | |
| bullet = new Bullet(width/2, 20); | |
| bullet.setSpeed(3.6, launchDegree-3); | |
| bullets.add(bullet); | |
| } | |
| if (launchDegree > 175 || launchDegree < 5) { | |
| launchDegreeDelta *= -1; | |
| } | |
| launchDegree += launchDegreeDelta; | |
| } | |
| for(Iterator it = bullets.iterator(); it.hasNext();) { | |
| Bullet bullet = (Bullet) it.next(); | |
| bullet.move(); | |
| if (bullet.isOutOfBound()) { | |
| it.remove(); | |
| } | |
| else { | |
| bullet.draw(); | |
| } | |
| } | |
| } | |
| /** | |
| * Bullet Class | |
| */ | |
| class Bullet { | |
| float x; | |
| float y; | |
| float vx; | |
| float vy; | |
| float size = 5; | |
| int reflectionCount = 1; | |
| public Bullet(float x, float y) { | |
| this.x = x; | |
| this.y = y; | |
| } | |
| void setSpeed(float v, float degree) { | |
| vx = v * cos(radians(degree)); | |
| vy = v * sin(radians(degree)); | |
| } | |
| void setSpeedWithRadian(float v, float radian) { | |
| vx = v * cos(radian); | |
| vy = v * sin(radian); | |
| } | |
| void draw() { | |
| if (this.reflectionCount > 0) { | |
| stroke(0); | |
| } else { | |
| stroke(0xFFb00000); | |
| } | |
| ellipseMode(CENTER); | |
| ellipse(x, y, size, size); | |
| } | |
| void move() { | |
| this.x += vx; | |
| this.y += vy; | |
| // Reflection at top, right, and left walls | |
| if (this.x < size || | |
| this.x > width - size || | |
| this.y < size) { | |
| if (this.reflectionCount > 0) { | |
| float targetRadian = atan2(mouseY - this.y, mouseX - this.x); | |
| this.setSpeedWithRadian(3.6, targetRadian); | |
| this.reflectionCount--; | |
| } | |
| } | |
| } | |
| boolean isOutOfBound() { | |
| return (this.x < - OUT_OF_BOUND_MERGIN || | |
| this.x > width + OUT_OF_BOUND_MERGIN || | |
| this.y < - OUT_OF_BOUND_MERGIN || | |
| this.y > height + OUT_OF_BOUND_MERGIN | |
| ); | |
| } | |
| } |
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