public void Fire()
{
Random rnd = new Random();
if (!Start)
{
Start = true;
// 设置全局的阻力
PhysicsWorld.CreateGlobalZone(new ParticleDrag(0.5, 0.5));
// 初始化水
for (int i = 0; i < 20; i++)
{
var item = PhysicsWorld.CreateParticle
(
new Vector2D
(
rnd.Next((int)Bitmap.Width).ToSimUnits(),
rnd.Next((int)Bitmap.Height).ToSimUnits()
),
Vector2D.Zero,
1
);
item.BindShape(new Circle(2.ToSimUnits()));
_water.ObjList.Add(item);
}
}
// 抖动
_water.ObjList.ForEach(obj => obj.Velocity.Set(rnd.Next(5) - 2.5, rnd.Next(5) - 2.5));
}
public ContactDemo(Image image)
: base(image)
{
Settings.ContactIteration = 1;
const int num = 5;
for (int i = 0; i < num; i++)
{
var fB = PhysicsWorld.CreateFixedParticle((new Vector2D(160 + 40 * i, 0)).ToSimUnits());
var pB = PhysicsWorld.CreateParticle((new Vector2D(160 + 40 * i, 200)).ToSimUnits(), new Vector2D(0, 0), 2);
var ball = new Ball
{
FixedParticle = fB,
Particle = pB,
R = 20
};
// 为质体绑定形状
ball.Particle.BindShape(new Circle(ball.R.ToSimUnits()));
PhysicsWorld.CreateRope(200.ToSimUnits(), 0, fB, pB);
DrawQueue.Add(ball);
_ballList.Add(ball);
}
// 增加重力和空气阻力
PhysicsWorld.CreateGlobalZone(new ParticleGravity(new Vector2D(0, 40)));
PhysicsWorld.CreateParticle(Vector2D.Zero, new Vector2D(1, 0), 1);
Slot = 1 / 120.0;
Start = true;
}
public void Fire()
{
if (!Start)
{
// 全局增加一个小阻尼
PhysicsWorld.CreateGlobalZone(new ParticleDrag(0.01, 0.02));
Start = true;
}
var item = PhysicsWorld.CreateParticle
(
new Vector2D(200.ToSimUnits(), 200.ToSimUnits()),
new Vector2D(0, 5),
1
);
_objList.Add(item);
}
public ElasticDemo(Image image)
: base(image)
{
// 设置全局的阻力用以增加稳定性
PhysicsWorld.CreateGlobalZone(new ParticleDrag(0.8f, 0.6f));
}