coment::Entity EntityFactory::createExplosion(coment::World& world, float x, float y, float scale)
{
coment::Entity entity = world.createEntity();
world.addComponent(entity, Position(x, y));
Sprite sprite;
sprite.name = "explosion";
sprite.color = Color({ 1.0f, 0.84f, 0.0f, 0.5f });
sprite.scale = scale;
sprite.layer = Sprite::Layer::PARTICLES;
world.addComponent(entity, sprite);
world.addComponent(entity, Expires(0.5f));
ScaleAnimation scaleAnimation;
scaleAnimation.active = true;
scaleAnimation.max = scale;
scaleAnimation.min = scale / 100.f;
scaleAnimation.speed = -2.5f;
scaleAnimation.repeat = false;
world.addComponent(entity, scaleAnimation);
return entity;
}
str
MicroTime()
{
struct timeval tv;
if (gettimeofday(&tv,NULL)) return Expires();
return _("%i", (tv.tv_sec << 20) + tv.tv_usec);
}
coment::Entity EntityFactory::createPlayerBullet(coment::World& world, float x, float y)
{
coment::Entity entity = world.createEntity();
world.addComponent<Position>(entity, Position(x, y));
Sprite sprite;
sprite.name = "laser";
sprite.layer = Sprite::Layer::PARTICLES;
world.addComponent(entity, sprite);
world.addComponent(entity, Velocity(0.f, -800.f));
world.addComponent(entity, Expires(1.5f));
world.addComponent(entity, Bounds(5.f));
world.addGroup(entity, "PLAYER_BULLETS");
return entity;
}
coment::Entity EntityFactory::createParticle(coment::World& world, float x, float y)
{
coment::Entity entity = world.createEntity();
//return entity;
// First working solution with SFML
//sf::Vector2f velocity(0.f, (float)(std::rand() % 800 - 400));
//sf::Transform rotationTransform;
//rotationTransform.rotate((rand() % 36000) / 100.f);
//velocity = rotationTransform.transformPoint(velocity);
// Second working solution
// http://stackoverflow.com/a/5838055/1702695
float t = 2.f * 3.141592654f * MathUtils::randomFloat();
float u = MathUtils::randomFloat() + MathUtils::randomFloat();
float r = (u>1) ? 2.f-u : u;
Vector2f velocity(r * std::cos(t), r * std::sin(t));
velocity = velocity * (MathUtils::randomFloat() * 800.f - 400.f);
// I benchmark it and it's faster than the first solution
// Bench (in Release mode):
// solution 1: 192ms for 1'000'000 iterations
// solution 2: 50ms for 1'000'000 iterations
world.addComponent(entity, Position(x, y));
world.addComponent(entity, Velocity(velocity.x, velocity.y));
world.addComponent(entity, Expires(7.f));
Sprite sprite;
sprite.name = "particle";
sprite.color = Color({1.0f, 0.84f, 0.0f, 0.5f});
sprite.layer = Sprite::Layer::PARTICLES;
world.addComponent(entity, sprite);
ColorAnimation colorAnimation;
colorAnimation.animate[ColorAnimation::A] = true;
colorAnimation.speed[ColorAnimation::A] = -0.2f;
colorAnimation.min[ColorAnimation::A] = 0.f;
colorAnimation.max[ColorAnimation::A] = 1.f;
colorAnimation.repeat = false;
world.addComponent(entity, colorAnimation);
}