/**
* @param x1 #start
* @param y1 #start
* @param x2 #end
* @param y2 #end
* @param numParticles #density
*/
public void MakeFrontFire(int x1, int y1, int x2, int y2, int numParticles) {
final Timeline fronttimeline = new Timeline();
y2 = (int) (y2 - ((y2 - y1) * .8));
for (int i = 0; i < numParticles; i++) {
int size = CoreMath.rand(15, 20);
int duration = (100 - size) * 10;
int moveDistance = CoreMath.rand(1, 4 * size);
double moveDirection = 180; // CoreMath.rand(0,5);
int startX = x1 + i * (x2 - x1) / numParticles;
int startY = y1 + i * (y2 - y1) / numParticles;
int goalX = startX + (int) (moveDistance * Math.cos(moveDirection));
int goalY = startY + (int) (moveDistance * Math.sin(moveDirection));
CoreImage image = flame[CoreMath.rand(flame.length - 1)];
Sprite sprite = new ImageSprite(image, startX, startY);
sprite.setAnchor(.5, .5);
sprite.setSize(size * 6, size * 2);
sprite.alpha.set(50);
scene.add(sprite);
fronttimeline.animate(
sprite.height, sprite.height.get(), sprite.width.get(), duration, Easing.REGULAR_OUT);
fronttimeline.animateTo(sprite.x, goalX, duration, Easing.REGULAR_OUT);
fronttimeline.animateTo(sprite.y, goalY, duration, Easing.REGULAR_OUT);
fronttimeline.at(100).animateTo(sprite.alpha, 0, duration - 100, Easing.REGULAR_OUT);
fronttimeline.add(new RemoveSpriteEvent(scene.getMainLayer(), sprite, duration));
}
scene.addTimeline(fronttimeline);
}
