flutter/examples/game/lib/explosions.dart
2015-09-01 15:34:43 -07:00

110 lines
3.4 KiB
Dart

part of game;
class Explosion extends Node {
Explosion() {
zPosition = 10.0;
}
}
class ExplosionBig extends Explosion {
ExplosionBig(SpriteSheet sheet) {
// Add particles
ParticleSystem particlesDebris = new ParticleSystem(
sheet["explosion_particle.png"],
rotateToMovement: true,
startRotation:90.0,
startRotationVar: 0.0,
endRotation: 90.0,
startSize: 0.3,
startSizeVar: 0.1,
endSize: 0.3,
endSizeVar: 0.1,
numParticlesToEmit: 25,
emissionRate:1000.0,
greenVar: 127,
redVar: 127,
life: 0.75,
lifeVar: 0.5
);
particlesDebris.zPosition = 1010.0;
addChild(particlesDebris);
ParticleSystem particlesFire = new ParticleSystem(
sheet["fire_particle.png"],
colorSequence: new ColorSequence([new Color(0xffffff33), new Color(0xffff3333), new Color(0x00ff3333)], [0.0, 0.5, 1.0]),
numParticlesToEmit: 25,
emissionRate: 1000.0,
startSize: 0.5,
startSizeVar: 0.1,
endSize: 0.5,
endSizeVar: 0.1,
posVar: new Point(10.0, 10.0),
speed: 10.0,
speedVar: 5.0,
life: 0.75,
lifeVar: 0.5
);
particlesFire.zPosition = 1011.0;
addChild(particlesFire);
// Add ring
Sprite sprtRing = new Sprite(sheet["explosion_ring.png"]);
sprtRing.transferMode = sky.TransferMode.plus;
addChild(sprtRing);
Action scale = new ActionTween( (a) => sprtRing.scale = a, 0.2, 1.0, 0.75);
Action scaleAndRemove = new ActionSequence([scale, new ActionRemoveNode(sprtRing)]);
Action fade = new ActionTween( (a) => sprtRing.opacity = a, 1.0, 0.0, 0.75);
actions.run(scaleAndRemove);
actions.run(fade);
// Add streaks
for (int i = 0; i < 5; i++) {
Sprite sprtFlare = new Sprite(sheet["explosion_flare.png"]);
sprtFlare.pivot = new Point(0.3, 1.0);
sprtFlare.scaleX = 0.3;
sprtFlare.transferMode = sky.TransferMode.plus;
sprtFlare.rotation = randomDouble() * 360.0;
addChild(sprtFlare);
double multiplier = randomDouble() * 0.3 + 1.0;
Action scale = new ActionTween( (a) => sprtFlare.scaleY = a, 0.3 * multiplier, 0.8, 0.75 * multiplier);
Action scaleAndRemove = new ActionSequence([scale, new ActionRemoveNode(sprtFlare)]);
Action fadeIn = new ActionTween( (a) => sprtFlare.opacity = a, 0.0, 1.0, 0.25 * multiplier);
Action fadeOut = new ActionTween( (a) => sprtFlare.opacity = a, 1.0, 0.0, 0.5 * multiplier);
Action fadeInOut = new ActionSequence([fadeIn, fadeOut]);
actions.run(scaleAndRemove);
actions.run(fadeInOut);
}
}
}
class ExplosionMini extends Explosion {
ExplosionMini(SpriteSheet sheet) {
for (int i = 0; i < 2; i++) {
Sprite star = new Sprite(sheet["star_0.png"]);
star.scale = 0.5;
star.colorOverlay = new Color(0xff95f4fb);
star.transferMode = sky.TransferMode.plus;
addChild(star);
double rotationStart = randomDouble() * 90.0;
double rotationEnd = 180.0 + randomDouble() * 90.0;
if (i == 0) {
rotationStart = -rotationStart;
rotationEnd = -rotationEnd;
}
ActionTween rotate = new ActionTween((a) => star.rotation = a, rotationStart, rotationEnd, 0.2);
actions.run(rotate);
ActionTween fade = new ActionTween((a) => star.opacity = a, 1.0, 0.0, 0.2);
actions.run(fade);
}
ActionSequence seq = new ActionSequence([new ActionDelay(0.2), new ActionRemoveNode(this)]);
actions.run(seq);
}
}