@Override
public void load() {
// Add background and set up blend mode
FilledSprite background;
Group particleLayer = new Group();
if (nextBlendMode == BlendMode.Add()) {
background = new FilledSprite(prevBackgroundColor);
background.fillColor.animateTo(BLACK, 500);
particleLayer.setBlendMode(nextBlendMode);
prevBackgroundColor = BLACK;
nextBlendMode = BlendMode.Multiply();
} else {
background = new FilledSprite(prevBackgroundColor);
background.fillColor.animateTo(WHITE, 500);
particleLayer.setBlendMode(nextBlendMode);
prevBackgroundColor = WHITE;
nextBlendMode = BlendMode.Add();
}
add(background);
particleLayer.alpha.set(0);
addLayer(particleLayer);
// Add particles
for (int i = 0; i < particles; i++) {
int[] x = new int[moves];
int[] y = new int[moves];
for (int j = 0; j < moves; j++) {
x[j] = rand(border, Stage.getWidth() - border * 2);
y[j] = rand(border, Stage.getHeight() - border * 2);
}
Timeline moveTimeline = new Timeline();
Sprite sprite = makeParticle();
particleLayer.add(sprite);
int startTime = 0;
for (int j = 0; j < moves; j++) {
int lastX = x[j];
int lastY = y[j];
int newX = x[(j + 1) % moves];
int newY = y[(j + 1) % moves];
int dx = newX - lastX;
int dy = newY - lastY;
int moveDur = (int) (Math.sqrt(dx * dx + dy * dy) * 50);
moveTimeline
.at(startTime)
.move(sprite, lastX, lastY, newX, newY, moveDur, Easing.ELASTIC_IN_OUT);
startTime += moveDur;
}
moveTimeline.loopForever();
addTimeline(moveTimeline);
// Create 3 mirror objects
Sprite mirror = makeParticle();
mirror.x.bindTo(mirrorX(sprite));
mirror.y.bindTo(mirrorY(sprite));
particleLayer.add(mirror);
mirror = makeParticle();
mirror.x.bindTo(mirrorX(sprite));
mirror.y.bindTo(sprite.y);
particleLayer.add(mirror);
mirror = makeParticle();
mirror.x.bindTo(sprite.x);
mirror.y.bindTo(mirrorY(sprite));
particleLayer.add(mirror);
}
// Transition to the next blend mode
int changeTime = 30000;
Timeline timeline = new Timeline();
timeline.at(500).animate(particleLayer.alpha, 0, 255, 2000);
timeline.at(changeTime - 2500).animate(particleLayer.alpha, 255, 0, 2000);
timeline.add(
new TimelineEvent(changeTime) {
public void run() {
reload();
}
});
addTimeline(timeline);
}
public class Compositing extends Scene2D {
BlendMode nextBlendMode = BlendMode.Add();
int prevBackgroundColor = BLACK;
int border = 100;
int particles = 4;
int moves = 4;
@Override
public void load() {
// Add background and set up blend mode
FilledSprite background;
Group particleLayer = new Group();
if (nextBlendMode == BlendMode.Add()) {
background = new FilledSprite(prevBackgroundColor);
background.fillColor.animateTo(BLACK, 500);
particleLayer.setBlendMode(nextBlendMode);
prevBackgroundColor = BLACK;
nextBlendMode = BlendMode.Multiply();
} else {
background = new FilledSprite(prevBackgroundColor);
background.fillColor.animateTo(WHITE, 500);
particleLayer.setBlendMode(nextBlendMode);
prevBackgroundColor = WHITE;
nextBlendMode = BlendMode.Add();
}
add(background);
particleLayer.alpha.set(0);
addLayer(particleLayer);
// Add particles
for (int i = 0; i < particles; i++) {
int[] x = new int[moves];
int[] y = new int[moves];
for (int j = 0; j < moves; j++) {
x[j] = rand(border, Stage.getWidth() - border * 2);
y[j] = rand(border, Stage.getHeight() - border * 2);
}
Timeline moveTimeline = new Timeline();
Sprite sprite = makeParticle();
particleLayer.add(sprite);
int startTime = 0;
for (int j = 0; j < moves; j++) {
int lastX = x[j];
int lastY = y[j];
int newX = x[(j + 1) % moves];
int newY = y[(j + 1) % moves];
int dx = newX - lastX;
int dy = newY - lastY;
int moveDur = (int) (Math.sqrt(dx * dx + dy * dy) * 50);
moveTimeline
.at(startTime)
.move(sprite, lastX, lastY, newX, newY, moveDur, Easing.ELASTIC_IN_OUT);
startTime += moveDur;
}
moveTimeline.loopForever();
addTimeline(moveTimeline);
// Create 3 mirror objects
Sprite mirror = makeParticle();
mirror.x.bindTo(mirrorX(sprite));
mirror.y.bindTo(mirrorY(sprite));
particleLayer.add(mirror);
mirror = makeParticle();
mirror.x.bindTo(mirrorX(sprite));
mirror.y.bindTo(sprite.y);
particleLayer.add(mirror);
mirror = makeParticle();
mirror.x.bindTo(sprite.x);
mirror.y.bindTo(mirrorY(sprite));
particleLayer.add(mirror);
}
// Transition to the next blend mode
int changeTime = 30000;
Timeline timeline = new Timeline();
timeline.at(500).animate(particleLayer.alpha, 0, 255, 2000);
timeline.at(changeTime - 2500).animate(particleLayer.alpha, 255, 0, 2000);
timeline.add(
new TimelineEvent(changeTime) {
public void run() {
reload();
}
});
addTimeline(timeline);
}
Sprite makeParticle() {
CoreImage image = CoreImage.load("particle.png");
int color = hue(rand(0, 255));
final ImageSprite sprite = new ImageSprite(image.tint(color), 0, 0);
sprite.setAnchor(0.5, 0.5);
sprite.pixelSnapping.set(true);
Blur blur = new Blur(8);
blur.quality.set(1);
blur.radius.bindTo(
new BindFunction() {
public Number f() {
int w = Stage.getWidth() / 2;
double f = 1 - Math.abs(w - sprite.x.get()) / w;
if (f < 0.10) {
return 0;
} else {
return 16 * (f - 0.10);
}
}
});
sprite.setFilter(blur);
return sprite;
}
BindFunction mirrorX(final Sprite source) {
return new BindFunction() {
public Number f() {
return (Stage.getWidth() - source.x.get());
}
};
}
BindFunction mirrorY(final Sprite source) {
return new BindFunction() {
public Number f() {
return (Stage.getHeight() - source.y.get());
}
};
}
}
