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Easing transtions for particles

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This commit is contained in:
Felipe Alfonso 2017-09-21 14:08:27 -03:00
parent 56e026e31b
commit 43dd0a6adc
2 changed files with 46 additions and 9 deletions
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13
v3/src/gameobjects/emitter/Particle.js
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@ -11,7 +11,6 @@ var Particle = new Class({
this.y = y;
this.velocityX = 0.0;
this.velocityY = 0.0;
this.angularVelocity = 0.0;
this.rotation = 0.0;
this.scaleX = 1.0;
this.scaleY = 1.0;
@ -23,13 +22,15 @@ var Particle = new Class({
this.start = {
tint: 0xFFFFFF,
alpha: 1.0,
scale: 1.0
scale: 1.0,
angle: 0.0
};
this.end = {
tint: 0xFFFFFF,
alpha: 1.0,
scale: 1.0
scale: 1.0,
angle: 0.0
};
},
@ -51,13 +52,15 @@ var Particle = new Class({
this.start = {
tint: 0xFFFFFF,
alpha: 1.0,
scale: 1.0
scale: 1.0,
angle: 0.0
};
this.end = {
tint: 0xFFFFFF,
alpha: 1.0,
scale: 1.0
scale: 1.0,
angle: 0.0
};
return this;
},

42
v3/src/gameobjects/emitter/ParticleEmitter.js
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@ -6,6 +6,8 @@ var Render = require('./ParticleEmitterRender');
var Particle = require('./Particle');
var Between = require('../../math/Between');
var StableSort = require('../../utils/array/StableSort');
var Easing = require('../../math/easing');
var GetEaseFunction = require('../../tween/builder/GetEaseFunction');
var ParticleEmitter = new Class({
@ -45,10 +47,37 @@ var ParticleEmitter = new Class({
this.gravityY = 0;
this.life = 1.0;
this.deathCallback = null;
this.easingFunctionAlpha = Easing.Linear;
this.easingFunctionScale = Easing.Linear;
this.easingFunctionRotation = Easing.Linear;
this.setTexture(texture, frame);
this.setPosition(x, y);
},
setEase: function (easeName, easeParam)
{
var ease = GetEaseFunction(easeName, easeParam);
this.easingFunctionAlpha = ease;
this.easingFunctionScale = ease;
this.easingFunctionRotation = ease;
},
setAlphaEase: function (easeName, easeParam)
{
this.easingFunctionAlpha = GetEaseFunction(easeName, easeParam);
},
setScaleEase: function (easeName, easeParam)
{
this.easingFunctionScale = GetEaseFunction(easeName, easeParam);
},
setRotationEase: function (easeName, easeParam)
{
this.easingFunctionRotation = GetEaseFunction(easeName, easeParam);
},
setSpeed: function (min, max)
{
this.minSpeed = min;
@ -165,7 +194,6 @@ var ParticleEmitter = new Class({
particle = new Particle(this.x, this.y);
}
particle.rotation = Between(this.minPartAngle, this.maxPartAngle) * Math.PI / 180;
particle.velocityX = vx;
particle.velocityY = vy;
particle.life = Math.max(this.life, Number.MIN_VALUE);
@ -176,6 +204,8 @@ var ParticleEmitter = new Class({
particle.scaleY = this.minScale;
particle.start.alpha = this.minAlpha;
particle.end.alpha = this.maxAlpha;
particle.start.rotation = this.minPartAngle * Math.PI / 180;
particle.end.rotation = this.maxPartAngle * Math.PI / 180;
particle.color = (particle.color & 0x00FFFFFF) | (((this.minAlpha * 0xFF)|0) << 24);
particle.index = this.alive.length;
@ -203,15 +233,19 @@ var ParticleEmitter = new Class({
particle.velocityY += gravityY;
particle.x += particle.velocityX * emitterStep;
particle.y += particle.velocityY * emitterStep;
particle.rotation += particle.angularVelocity * emitterStep;
particle.normLifeStep = particle.lifeStep / particle.life;
var norm = 1.0 - particle.normLifeStep;
var alphaf = (particle.end.alpha - particle.start.alpha) * norm + particle.start.alpha;
var scale = (particle.end.scale - particle.start.scale) * norm + particle.start.scale;
var alphaEase = this.easingFunctionAlpha(norm);
var scaleEase = this.easingFunctionScale(norm);
var rotationEase = this.easingFunctionRotation(norm);
var alphaf = (particle.end.alpha - particle.start.alpha) * alphaEase + particle.start.alpha;
var scale = (particle.end.scale - particle.start.scale) * scaleEase + particle.start.scale;
var rotation = (particle.end.rotation - particle.start.rotation) * rotationEase + particle.start.rotation;
particle.scaleX = particle.scaleY = scale;
particle.color = (particle.color & 0x00FFFFFF) | (((alphaf * 0xFF)|0) << 24);
particle.rotation = rotation;
if (particle.lifeStep <= 0)
{