public Atom(Symbol symbol, Vector2 position, GameContent gameContent, World world)
{
this.gameContent = gameContent;
this.world = world;
if (symbol == Symbol.Ra) eye = EyeState.Angry;
this.symbol = symbol;
this.symbolStr = symbol.ToString();
symbolCenter = gameContent.symbolFont.MeasureString(this.symbolStr);
symbolCenter.X *= 0.5f;
symbolCenter.Y *= 0.92f;
bondsLeft = (int)symbol;
BodyDef bd = new BodyDef();
bd.type = BodyType.Dynamic;
bd.position = this.position = position / gameContent.b2Scale;
bd.bullet = true;
body = world.CreateBody(bd);
body.SetUserData(this);
CircleShape cs = new CircleShape();
cs._radius = gameContent.atomRadius / gameContent.b2Scale;
FixtureDef fd = new FixtureDef();
fd.shape = cs;
fd.restitution = 0.2f;
fd.friction = 0.5f;
fixture = body.CreateFixture(fd);
electroShockAnimation = new Animation(gameContent.electroShock, 3, 0.1f, true, new Vector2(0.5f, 0.5f));
radiationSmoke = new RadiationSmoke(gameContent, this);
// Collide only with Ground but not with itself and bonded Filter
mouseFilter = new Filter();
mouseFilter.categoryBits = 0x0002; mouseFilter.maskBits = 0x0001; mouseFilter.groupIndex = -2;
// Collide with every thing
atomFilter = new Filter();
atomFilter.categoryBits = 0x0001; atomFilter.maskBits = 0x0001; atomFilter.groupIndex = 1;
fixture.SetFilterData(ref atomFilter);
SetMode(false, false);
}