/// <summary>
///
/// </summary>
/// <returns></returns>
public override b2Shape CreatePhysicsShape()
{
var shape = new b2PolygonShape();
shape.SetAsBox(PhysicWidth / 2f, PhysicHeight / 2f);
GroundSprite.DrawRect(new CCRect(0, 0, Width, Height), CCColor4B.Black);
return shape;
}
/**
* Set this as a single edge.
*/
static public b2PolygonShape AsEdge(b2Vec2 v1, b2Vec2 v2)
{
b2PolygonShape polygonShape = new b2PolygonShape();
polygonShape.SetAsEdge(v1, v2);
return(polygonShape);
}
public override b2Shape Copy()
{
b2PolygonShape s = new b2PolygonShape();
s.Set(this);
return(s);
}
public static b2PolygonShape AsBox(float hx, float hy)
{
b2PolygonShape polygonShape = new b2PolygonShape();
polygonShape.SetAsBox(hx, hy);
return(polygonShape);
}
public static b2PolygonShape AsOrientedBox(float hx, float hy, b2Vec2 center = null, float angle = 0.0f)
{
b2PolygonShape polygonShape = new b2PolygonShape();
polygonShape.SetAsOrientedBox(hx, hy, center, angle);
return(polygonShape);
}
public static b2PolygonShape AsVector(List <b2Vec2> vertices, int vertexCount)
{
b2PolygonShape polygonShape = new b2PolygonShape();
polygonShape.SetAsVector(vertices, vertexCount);
return(polygonShape);
}
public JumpPad(b2Vec2 JumpImpuls, CCPoint Position, b2World gameWorld)
{
this.Texture = new CCTexture2D ("jumppad");
this.Scale = SpriteScale;
this.Position = Position;
this.IsAntialiased = false;
jumpImpuls = JumpImpuls;
totalJumps = 0;
//box2d
b2BodyDef jumpPadDef = new b2BodyDef ();
jumpPadDef.type = b2BodyType.b2_kinematicBody;
jumpPadDef.position = new b2Vec2 ((Position.X + this.ScaledContentSize.Width/2)/PhysicsHandler.pixelPerMeter, (Position.Y + this.ScaledContentSize.Height/4) / PhysicsHandler.pixelPerMeter);
JumpPadBody = gameWorld.CreateBody (jumpPadDef);
b2PolygonShape jumpPadShape = new b2PolygonShape ();
jumpPadShape.SetAsBox ((float)this.ScaledContentSize.Width / PhysicsHandler.pixelPerMeter / 2, (float)this.ScaledContentSize.Height / PhysicsHandler.pixelPerMeter / 4);// /4 weil die hitbox nur die hälfte der textur ist
b2FixtureDef jumpPadFixture = new b2FixtureDef ();
jumpPadFixture.shape = jumpPadShape;
jumpPadFixture.density = 0.0f; //Dichte
jumpPadFixture.restitution = 0f; //Rückprall
jumpPadFixture.friction = 0f;
jumpPadFixture.userData = WorldFixtureData.jumppad;
JumpPadBody.CreateFixture (jumpPadFixture);
//
}
public static b2PolygonShape AsArray(b2Vec2[] vertices, int vertexCount)
{
b2PolygonShape polygonShape = new b2PolygonShape();
polygonShape.SetAsArray(vertices, vertexCount);
return(polygonShape);
}
public b2PolygonShape(b2PolygonShape copy)
: base((b2Shape)copy)
{
Centroid = copy.Centroid;
Array.Copy(copy.Vertices, Vertices, copy.Vertices.Length);
Array.Copy(copy.Normals, Normals, copy.Normals.Length);
m_vertexCount = copy.m_vertexCount;
}
public b2PolygonShape(b2PolygonShape copy)
: base((b2Shape)copy)
{
Centroid = copy.Centroid;
Array.Copy(copy.Vertices, Vertices, copy.Vertices.Length);
Array.Copy(copy.Normals, Normals, copy.Normals.Length);
m_vertexCount = copy.m_vertexCount;
}
public ContinuousTest()
{
{
b2BodyDef bd = new b2BodyDef();
bd.position.Set(0.0f, 0.0f);
b2Body body = m_world.CreateBody(bd);
b2EdgeShape edge = new b2EdgeShape();
edge.Set(new b2Vec2(-10.0f, 0.0f), new b2Vec2(10.0f, 0.0f));
body.CreateFixture(edge, 0.0f);
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(0.2f, 1.0f, new b2Vec2(0.5f, 1.0f), 0.0f);
body.CreateFixture(shape, 0.0f);
}
#if true
{
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.position.Set(0.0f, 20.0f);
//bd.angle = 0.1f;
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(2.0f, 0.1f);
m_body = m_world.CreateBody(bd);
m_body.CreateFixture(shape, 1.0f);
m_angularVelocity = Rand.RandomFloat(-50.0f, 50.0f);
//m_angularVelocity = 46.661274f;
m_body.LinearVelocity = new b2Vec2(0.0f, -100.0f);
m_body.AngularVelocity = m_angularVelocity;
}
#else
{
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.position.Set(0.0f, 2.0f);
b2Body body = m_world.CreateBody(bd);
b2CircleShape shape = new b2CircleShape();
shape.Position = b2Vec2.Zero;
shape.Radius = 0.5f;
body.CreateFixture(shape, 1.0f);
bd.bullet = true;
bd.position.Set(0.0f, 10.0f);
body = m_world.CreateBody(bd);
body.CreateFixture(shape, 1.0f);
body.LinearVelocity = new b2Vec2(0.0f, -100.0f);
}
#endif
}
public Pulleys()
{
float y = 16.0f;
float L = 12.0f;
float a = 1.0f;
float b = 2.0f;
b2Body ground = null;
{
b2BodyDef bd = new b2BodyDef();
ground = m_world.CreateBody(bd);
b2EdgeShape edge = new b2EdgeShape();
edge.Set(new b2Vec2(-40.0f, 0.0f), new b2Vec2(40.0f, 0.0f));
//ground->CreateFixture(&shape, 0.0f);
b2CircleShape circle = new b2CircleShape();
circle.Radius = 2.0f;
circle.Position = new b2Vec2(-10.0f, y + b + L);
ground.CreateFixture(circle, 0.0f);
circle.Position = new b2Vec2(10.0f, y + b + L);
ground.CreateFixture(circle, 0.0f);
}
{
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(a, b);
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
//bd.fixedRotation = true;
bd.position.Set(-10.0f, y);
b2Body body1 = m_world.CreateBody(bd);
body1.CreateFixture(shape, 5.0f);
bd.position.Set(10.0f, y);
b2Body body2 = m_world.CreateBody(bd);
body2.CreateFixture(shape, 5.0f);
b2PulleyJointDef pulleyDef = new b2PulleyJointDef();
b2Vec2 anchor1 = new b2Vec2(-10.0f, y + b);
b2Vec2 anchor2 = new b2Vec2(10.0f, y + b);
b2Vec2 groundAnchor1 = new b2Vec2(-10.0f, y + b + L);
b2Vec2 groundAnchor2 = new b2Vec2(10.0f, y + b + L);
pulleyDef.Initialize(body1, body2, groundAnchor1, groundAnchor2, anchor1, anchor2, 1.5f);
m_joint1 = (b2PulleyJoint) m_world.CreateJoint(pulleyDef);
}
}
//public const int e_columnCount = 1;
//public const int e_rowCount = 1;
public VerticalStack()
{
{
b2BodyDef bd = new b2BodyDef();
b2Body ground = m_world.CreateBody(bd);
b2EdgeShape shape = new b2EdgeShape();
shape.Set(new b2Vec2(-40.0f, 0.0f), new b2Vec2(40.0f, 0.0f));
ground.CreateFixture(shape, 0.0f);
shape.Set(new b2Vec2(20.0f, 0.0f), new b2Vec2(20.0f, 20.0f));
ground.CreateFixture(shape, 0.0f);
}
float[] xs = {0.0f, -10.0f, -5.0f, 5.0f, 10.0f};
for (int j = 0; j < e_columnCount; ++j)
{
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(0.5f, 0.5f);
b2FixtureDef fd = new b2FixtureDef();
fd.shape = shape;
fd.density = 1.0f;
fd.friction = 0.3f;
for (int i = 0; i < e_rowCount; ++i)
{
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
int n = j * e_rowCount + i;
Debug.Assert(n < e_rowCount * e_columnCount);
m_indices[n] = n;
bd.userData = m_indices[n];
float x = 0.0f;
//float32 x = RandomFloat(-0.02f, 0.02f);
//float32 x = i % 2 == 0 ? -0.025f : 0.025f;
bd.position.Set(xs[j] + x, 0.752f + 1.54f * i);
b2Body body = m_world.CreateBody(bd);
m_bodies[n] = body;
body.CreateFixture(fd);
}
}
m_bullet = null;
}
void CreatePlatform() {
// Define the dynamic body.
var bodyDef = new b2BodyDef();
bodyDef.type = b2BodyType.b2_staticBody; //or you could use b2_staticBody
bodyDef.position.Set(initialLocation.X/Constants.PTM_RATIO, initialLocation.Y/Constants.PTM_RATIO);
var shape = new b2PolygonShape();
var num = 4;
b2Vec2[] vertices = {
new b2Vec2(-102.0f / Constants.PTM_RATIO, -49.5f / Constants.PTM_RATIO),
new b2Vec2(-113.0f / Constants.PTM_RATIO, -81.5f / Constants.PTM_RATIO),
new b2Vec2(113.0f / Constants.PTM_RATIO, -84.5f / Constants.PTM_RATIO),
new b2Vec2(106.0f / Constants.PTM_RATIO, -47.5f / Constants.PTM_RATIO)
};
shape.Set(vertices, num);
// Define the dynamic body fixture.
var fixtureDef = new b2FixtureDef();
fixtureDef.shape = shape;
fixtureDef.density = 1.0f;
fixtureDef.friction = 0.3f;
fixtureDef.restitution = 0.1f;
CreateBodyWithSpriteAndFixture(theWorld, bodyDef, fixtureDef, spriteImageName);
//CONTINUING TO ADD BODY SHAPE....
// THIS IS THE Sling base....
//row 1, col 1
var num2 = 4;
b2Vec2[] vertices2 = {
new b2Vec2(41.0f / Constants.PTM_RATIO, -6.5f / Constants.PTM_RATIO),
new b2Vec2(35.0f / Constants.PTM_RATIO, -57.5f / Constants.PTM_RATIO),
new b2Vec2(57.0f / Constants.PTM_RATIO, -65.5f / Constants.PTM_RATIO),
new b2Vec2(49.0f / Constants.PTM_RATIO, -7.5f / Constants.PTM_RATIO)
};
shape.Set(vertices2, num2);
fixtureDef.shape = shape;
body.CreateFixture(fixtureDef);
}
public override void Set(b2Shape other)
{
base.Set(other);
if (other is b2PolygonShape)
{
b2PolygonShape other2 = other as b2PolygonShape;
m_centroid.SetV(other2.m_centroid);
m_vertexCount = other2.m_vertexCount;
Reserve(m_vertexCount);
for (int i = 0; i < m_vertexCount; i++)
{
m_vertices[i].SetV(other2.m_vertices[i]);
m_normals[i].SetV(other2.m_normals[i]);
}
}
}
public override void Step(Settings settings)
{
base.Step(settings);
if (m_count < e_count)
{
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.position.Set(0.0f, 10.0f);
b2Body body = m_world.CreateBody(bd);
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(0.125f, 0.125f);
body.CreateFixture(shape, 1.0f);
++m_count;
}
}
private void CreateGround()
{
// Define the dynamic body.
var bodyDef = new b2BodyDef();
bodyDef.type = b2BodyType.b2_staticBody; //or you could use b2_staticBody
bodyDef.position.Set(initialLocation.X/Constants.PTM_RATIO, initialLocation.Y/Constants.PTM_RATIO);
b2PolygonShape shape = new b2PolygonShape();
int num = 4;
b2Vec2[] vertices = {
new b2Vec2(-1220.0f / Constants.PTM_RATIO, 54.0f / Constants.PTM_RATIO),
new b2Vec2(-1220.0f / Constants.PTM_RATIO, -52.0f / Constants.PTM_RATIO),
new b2Vec2(1019.0f / Constants.PTM_RATIO, -52.0f / Constants.PTM_RATIO),
new b2Vec2(1019.0f / Constants.PTM_RATIO, 54.0f / Constants.PTM_RATIO)
};
shape.Set(vertices, num);
// Define the dynamic body fixture.
var fixtureDef = new b2FixtureDef();
fixtureDef.shape = shape;
fixtureDef.density = 1.0f;
fixtureDef.friction = 1.0f;
fixtureDef.restitution = 0.1f;
CreateBodyWithSpriteAndFixture(theWorld, bodyDef, fixtureDef, spriteImageName);
if (!TheLevel.SharedLevel.IS_RETINA)
{
//non retina adjustment
sprite.ScaleX = 1.05f;
} else {
// retina adjustment
sprite.ScaleX = 2.05f;
sprite.ScaleY = 2.0f;
}
}
public Platform(List<CCPoint> platformWaypoints, int platformSpeed, Container gameContainer)
{
this.Texture = new CCTexture2D("platform");
this.Scale = SpriteScale;
this.IsAntialiased = false;
this.Position = platformWaypoints [0];
Waypoints = platformWaypoints;
speed = platformSpeed;
//umso geringer der speed umso schneller die platform
CurrentWaypoint = 0;
wayToMove = new CCSize (Waypoints [CurrentWaypoint + 1].X - Waypoints [CurrentWaypoint].X, Waypoints [CurrentWaypoint + 1].Y - Waypoints [CurrentWaypoint].Y);
//box2d
b2BodyDef platformDef = new b2BodyDef ();
platformDef.type = b2BodyType.b2_kinematicBody;
platformDef.position = new b2Vec2 (Waypoints[CurrentWaypoint].X / PhysicsHandler.pixelPerMeter, Waypoints[CurrentWaypoint].Y / PhysicsHandler.pixelPerMeter);
platformBody = gameContainer.physicsHandler.gameWorld.CreateBody (platformDef);
b2PolygonShape platformShape = new b2PolygonShape ();
platformShape.SetAsBox ((float)this.ScaledContentSize.Width / PhysicsHandler.pixelPerMeter / 2, (float)this.ScaledContentSize.Height / PhysicsHandler.pixelPerMeter / 2);
b2FixtureDef platformFixture = new b2FixtureDef ();
platformFixture.shape = platformShape;
platformFixture.density = 0.0f; //Dichte
platformFixture.restitution = 0f; //Rückprall
platformFixture.userData = WorldFixtureData.platform;
platformBody.CreateFixture (platformFixture);
//
this.Position = new CCPoint (platformBody.Position.x * PhysicsHandler.pixelPerMeter, platformBody.Position.y * PhysicsHandler.pixelPerMeter);
progressionX = wayToMove.Width/ (float)speed;
progressionY = wayToMove.Height/(float)speed ;
if (float.IsInfinity (progressionX))
progressionX = 0;
if (float.IsInfinity (progressionY))
progressionY = 0;
b2Vec2 Velocity = platformBody.LinearVelocity;
Velocity.y = progressionY;
Velocity.x = progressionX;
platformBody.LinearVelocity = Velocity;
}
public Prismatic()
{
b2Body ground = null;
{
b2BodyDef bd = new b2BodyDef();
ground = m_world.CreateBody(bd);
b2EdgeShape shape = new b2EdgeShape();
shape.Set(new b2Vec2(-40.0f, 0.0f), new b2Vec2(40.0f, 0.0f));
ground.CreateFixture(shape, 0.0f);
}
{
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(2.0f, 0.5f);
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.position.Set(-10.0f, 10.0f);
bd.angle = 0.5f * b2Settings.b2_pi;
bd.allowSleep = false;
b2Body body = m_world.CreateBody(bd);
body.CreateFixture(shape, 5.0f);
b2PrismaticJointDef pjd = new b2PrismaticJointDef();
// Bouncy limit
b2Vec2 axis = new b2Vec2(2.0f, 1.0f);
axis.Normalize();
pjd.Initialize(ground, body, new b2Vec2(0.0f, 0.0f), axis);
// Non-bouncy limit
//pjd.Initialize(ground, body, b2Vec2(-10.0f, 10.0f), b2Vec2(1.0f, 0.0f));
pjd.motorSpeed = 10.0f;
pjd.maxMotorForce = 10000.0f;
pjd.enableMotor = true;
pjd.lowerTranslation = 0.0f;
pjd.upperTranslation = 20.0f;
pjd.enableLimit = true;
m_joint = (b2PrismaticJoint) m_world.CreateJoint(pjd);
}
}
public AddPair()
{
m_world.Gravity = new b2Vec2(0.0f, 0.0f);
{
b2CircleShape shape = new b2CircleShape();
shape.Position = b2Vec2.Zero;
shape.Radius = 0.1f;
float minX = -6.0f;
float maxX = 0.0f;
float minY = 4.0f;
float maxY = 6.0f;
for (int i = 0; i < 400; ++i)
{
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.position = new b2Vec2(Rand.RandomFloat(minX, maxX), Rand.RandomFloat(minY, maxY));
b2Body body = m_world.CreateBody(bd);
body.CreateFixture(shape, 0.01f);
}
}
{
b2Shape shape = null;
if (_DoCircle)
{
shape = new b2CircleShape();
((b2CircleShape)shape).Radius = 1.5f;
}
else
{
shape = new b2PolygonShape();
((b2PolygonShape)shape).SetAsBox(1.6f, 1.6f);
}
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.position = new b2Vec2(-40.0f, 5.0f);
bd.bullet = true;
b2Body body = m_world.CreateBody(bd);
body.CreateFixture(shape, 1.0f);
body.LinearVelocity = new b2Vec2(150.0f, 0.0f);
}
}
public OneSidedPlatform()
{
// Ground
{
b2BodyDef bd = new b2BodyDef();
b2Body ground = m_world.CreateBody(bd);
b2EdgeShape shape = new b2EdgeShape();
shape.Set(new b2Vec2(-20.0f, 0.0f), new b2Vec2(20.0f, 0.0f));
ground.CreateFixture(shape, 0.0f);
}
// Platform
{
b2BodyDef bd = new b2BodyDef();
bd.position.Set(0.0f, 10.0f);
b2Body body = m_world.CreateBody(bd);
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(3.0f, 0.5f);
m_platform = body.CreateFixture(shape, 0.0f);
m_bottom = 10.0f - 0.5f;
m_top = 10.0f + 0.5f;
}
// Actor
{
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.position.Set(0.0f, 12.0f);
b2Body body = m_world.CreateBody(bd);
m_radius = 0.5f;
b2CircleShape shape = new b2CircleShape();
shape.Radius = m_radius;
m_character = body.CreateFixture(shape, 20.0f);
body.LinearVelocity = new b2Vec2(0.0f, -50.0f);
m_state = State.e_unknown;
}
}
public Chain()
{
b2Body ground = null;
{
b2BodyDef bd = new b2BodyDef();
ground = m_world.CreateBody(bd);
b2EdgeShape shape = new b2EdgeShape();
shape.Set(new b2Vec2(-40.0f, 0.0f), new b2Vec2(40.0f, 0.0f));
ground.CreateFixture(shape, 0.0f);
}
{
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(0.6f, 0.125f);
b2FixtureDef fd = new b2FixtureDef();
fd.shape = shape;
fd.density = 20.0f;
fd.friction = 0.2f;
b2RevoluteJointDef jd = new b2RevoluteJointDef();
jd.CollideConnected = false;
const float y = 25.0f;
b2Body prevBody = ground;
for (int i = 0; i < 30; ++i)
{
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.position.Set(0.5f + i, y);
b2Body body = m_world.CreateBody(bd);
body.CreateFixture(fd);
b2Vec2 anchor = new b2Vec2(i, y);
jd.Initialize(prevBody, body, anchor);
m_world.CreateJoint(jd);
prevBody = body;
}
}
}
public BulletTest()
{
{
b2BodyDef bd = new b2BodyDef();
bd.position.Set(0.0f, 0.0f);
b2Body body = m_world.CreateBody(bd);
b2EdgeShape edge = new b2EdgeShape();
edge.Set(new b2Vec2(-10.0f, 0.0f), new b2Vec2(10.0f, 0.0f));
body.CreateFixture(edge, 0.0f);
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(0.2f, 1.0f, new b2Vec2(0.5f, 1.0f), 0.0f);
body.CreateFixture(shape, 0.0f);
}
{
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.position.Set(0.0f, 4.0f);
b2PolygonShape box = new b2PolygonShape();
box.SetAsBox(2.0f, 0.1f);
m_body = m_world.CreateBody(bd);
m_body.CreateFixture(box, 1.0f);
box.SetAsBox(0.25f, 0.25f);
//m_x = RandomFloat(-1.0f, 1.0f);
m_x = 0.20352793f;
bd.position.Set(m_x, 10.0f);
bd.bullet = true;
m_bullet = m_world.CreateBody(bd);
m_bullet.CreateFixture(box, 100.0f);
m_bullet.LinearVelocity = new b2Vec2(0.0f, -50.0f);
}
}
public Pyramid()
{
{
b2BodyDef bd = new b2BodyDef();
b2Body ground = m_world.CreateBody(bd);
b2EdgeShape shape = new b2EdgeShape();
shape.Set(new b2Vec2(-40.0f, 0.0f), new b2Vec2(40.0f, 0.0f));
ground.CreateFixture(shape, 0.0f);
}
{
float a = 0.5f;
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(a, a);
b2Vec2 x = new b2Vec2(-7.0f, 0.75f);
b2Vec2 y;
b2Vec2 deltaX = new b2Vec2(0.5625f, 1.25f);
b2Vec2 deltaY = new b2Vec2(1.125f, 0.0f);
for (int i = 0; i < e_count; ++i)
{
y = x;
for (int j = i; j < e_count; ++j)
{
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.position = y;
b2Body body = m_world.CreateBody(bd);
body.CreateFixture(shape, 5.0f);
y += deltaY;
}
x += deltaX;
}
}
}
public Tumbler()
{
b2Body ground;
{
b2BodyDef bd = new b2BodyDef();
ground = m_world.CreateBody(bd);
}
{
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.allowSleep = false;
bd.position.Set(0.0f, 10.0f);
b2Body body = m_world.CreateBody(bd);
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(0.5f, 10.0f, new b2Vec2(10.0f, 0.0f), 0.0f);
body.CreateFixture(shape, 5.0f);
shape.SetAsBox(0.5f, 10.0f, new b2Vec2(-10.0f, 0.0f), 0.0f);
body.CreateFixture(shape, 5.0f);
shape.SetAsBox(10.0f, 0.5f, new b2Vec2(0.0f, 10.0f), 0.0f);
body.CreateFixture(shape, 5.0f);
shape.SetAsBox(10.0f, 0.5f, new b2Vec2(0.0f, -10.0f), 0.0f);
body.CreateFixture(shape, 5.0f);
b2RevoluteJointDef jd = new b2RevoluteJointDef();
jd.BodyA = ground;
jd.BodyB = body;
jd.localAnchorA.Set(0.0f, 10.0f);
jd.localAnchorB.Set(0.0f, 0.0f);
jd.referenceAngle = 0.0f;
jd.motorSpeed = 0.05f * b2Settings.b2_pi;
jd.maxMotorTorque = 1e8f;
jd.enableMotor = true;
m_joint = (b2RevoluteJoint) m_world.CreateJoint(jd);
}
m_count = 0;
}
public BoxProp(
b2World b2world,
double[] size,
double[] position
)
{
/*
static rectangle shaped prop
pars:
size - array [width, height]
position - array [x, y], in world meters, of center
*/
this.size = size;
//initialize body
var bdef = new b2BodyDef();
bdef.position = new b2Vec2(position[0], position[1]);
bdef.angle = 0;
bdef.fixedRotation = true;
this.body = b2world.CreateBody(bdef);
//initialize shape
var fixdef = new b2FixtureDef();
var shape = new b2PolygonShape();
fixdef.shape = shape;
shape.SetAsBox(this.size[0] / 2, this.size[1] / 2);
fixdef.restitution = 0.4; //positively bouncy!
this.body.CreateFixture(fixdef);
}
public ShapeEditing()
{
{
b2BodyDef bd1 = new b2BodyDef();
b2Body ground = m_world.CreateBody(bd1);
b2EdgeShape shape1 = new b2EdgeShape();
shape1.Set(new b2Vec2(-40.0f, 0.0f), new b2Vec2(40.0f, 0.0f));
ground.CreateFixture(shape1, 0.0f);
}
b2BodyDef bd = new b2BodyDef();
bd.type = b2BodyType.b2_dynamicBody;
bd.position.Set(0.0f, 10.0f);
m_body = m_world.CreateBody(bd);
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(4.0f, 4.0f, new b2Vec2(0.0f, 0.0f), 0.0f);
m_fixture1 = m_body.CreateFixture(shape, 10.0f);
m_fixture2 = null;
m_sensor = false;
}
public void addNewSpriteAtPosition(CCPoint p)
{
CCLog.Log("Add sprite #{2} : {0} x {1}", p.X, p.Y, _batch.ChildrenCount + 1);
//We have a 64x64 sprite sheet with 4 different 32x32 images. The following code is
//just randomly picking one of the images
int idx = (Random.Float_0_1() > .5 ? 0 : 1);
int idy = (Random.Float_0_1() > .5 ? 0 : 1);
var sprite = new CCPhysicsSprite(m_pSpriteTexture, new CCRect(32 * idx, 32 * idy, 32, 32));
_batch.AddChild(sprite, 0, kTagForPhysicsSprite);
sprite.Position = new CCPoint(p.X, p.Y);
// Define the dynamic body.
//Set up a 1m squared box in the physics world
b2BodyDef def = b2BodyDef.Create();
def.position = new b2Vec2(p.X / PTM_RATIO, p.Y / PTM_RATIO);
def.type = b2BodyType.b2_dynamicBody;
b2Body body = _world.CreateBody(def);
// Define another box shape for our dynamic body.
var dynamicBox = new b2PolygonShape();
dynamicBox.SetAsBox(.5f, .5f); //These are mid points for our 1m box
// Define the dynamic body fixture.
b2FixtureDef fd = b2FixtureDef.Create();
fd.shape = dynamicBox;
fd.density = 1f;
fd.friction = 0.3f;
b2Fixture fixture = body.CreateFixture(fd);
sprite.PhysicsBody = body;
//_world.SetContactListener(new Myb2Listener());
// _world.Dump();
}
/// Compute the collision manifold between two polygons.
// Find edge normal of max separation on A - return if separating axis is found
// Find edge normal of max separation on B - return if separation axis is found
// Choose reference edge as min(minA, minB)
// Find incident edge
// Clip
// The normal points from 1 to 2
public static void b2CollidePolygons(ref b2Manifold manifold,
b2PolygonShape polyA, ref b2Transform xfA,
b2PolygonShape polyB, ref b2Transform xfB)
{
manifold.pointCount = 0;
float totalRadius = polyA.Radius + polyB.Radius;
int edgeA = 0;
float separationA = b2FindMaxSeparation(out edgeA, polyA, ref xfA, polyB, ref xfB);
if (separationA > totalRadius)
return;
int edgeB = 0;
float separationB = b2FindMaxSeparation(out edgeB, polyB, ref xfB, polyA, ref xfA);
if (separationB > totalRadius)
return;
b2PolygonShape poly1; // reference polygon
b2PolygonShape poly2; // incident polygon
b2Transform xf1, xf2;
int edge1; // reference edge
byte flip;
const float k_relativeTol = 0.98f;
const float k_absoluteTol = 0.001f;
if (separationB > k_relativeTol * separationA + k_absoluteTol)
{
poly1 = polyB;
poly2 = polyA;
xf1 = xfB;
xf2 = xfA;
edge1 = edgeB;
manifold.type = b2ManifoldType.e_faceB;
flip = 1;
}
else
{
poly1 = polyA;
poly2 = polyB;
xf1 = xfA;
xf2 = xfB;
edge1 = edgeA;
manifold.type = b2ManifoldType.e_faceA;
flip = 0;
}
b2ClipVertex[] incidentEdge = new b2ClipVertex[2];
b2FindIncidentEdge(incidentEdge, poly1, xf1, edge1, poly2, xf2);
int count1 = poly1.VertexCount;
b2Vec2[] vertices1 = poly1.Vertices;
int iv1 = edge1;
int iv2 = edge1 + 1 < count1 ? edge1 + 1 : 0;
b2Vec2 v11 = vertices1[iv1];
b2Vec2 v12 = vertices1[iv2];
b2Vec2 localTangent = v12 - v11;
localTangent.Normalize();
b2Vec2 localNormal = localTangent.UnitCross(); // b2Math.b2Cross(localTangent, 1.0f);
b2Vec2 planePoint = 0.5f * (v11 + v12);
b2Vec2 tangent = b2Math.b2Mul(xf1.q, localTangent);
b2Vec2 normal = tangent.UnitCross(); // b2Math.b2Cross(tangent, 1.0f);
v11 = b2Math.b2Mul(xf1, v11);
v12 = b2Math.b2Mul(xf1, v12);
// Face offset.
float frontOffset = b2Math.b2Dot(ref normal, ref v11);
// Side offsets, extended by polytope skin thickness.
float sideOffset1 = -b2Math.b2Dot(ref tangent, ref v11) + totalRadius;
float sideOffset2 = b2Math.b2Dot(ref tangent, ref v12) + totalRadius;
// Clip incident edge against extruded edge1 side edges.
b2ClipVertex[] clipPoints1 = new b2ClipVertex[2];
b2ClipVertex[] clipPoints2 = new b2ClipVertex[2];
int np;
// Clip to box side 1
np = b2ClipSegmentToLine(clipPoints1, incidentEdge, -tangent, sideOffset1, (byte)iv1);
if (np < 2)
return;
// Clip to negative box side 1
np = b2ClipSegmentToLine(clipPoints2, clipPoints1, tangent, sideOffset2, (byte)iv2);
if (np < 2)
{
return;
}
// Now clipPoints2 contains the clipped points.
manifold.localNormal = localNormal;
manifold.localPoint = planePoint;
int pointCount = 0;
for (int i = 0; i < b2Settings.b2_maxManifoldPoints; ++i)
{
float separation = b2Math.b2Dot(ref normal, ref clipPoints2[i].v) - frontOffset;
if (separation <= totalRadius)
{
b2ManifoldPoint cp = manifold.points[pointCount];
cp.localPoint = b2Math.b2MulT(xf2, clipPoints2[i].v);
cp.id = clipPoints2[i].id;
if (flip != 0)
{
// Swap features
b2ContactFeature cf = cp.id;
cp.id.indexA = cf.indexB;
cp.id.indexB = cf.indexA;
cp.id.typeA = cf.typeB;
cp.id.typeB = cf.typeA;
}
manifold.points[pointCount] = cp;
++pointCount;
}
}
manifold.pointCount = pointCount;
}
public override b2Shape Clone()
{
b2PolygonShape clone = new b2PolygonShape(this);
return(clone);
}
public PhysicalBarrel(StarlingGameSpriteWithBunkerTextures textures, StarlingGameSpriteWithPhysics Context)
{
this.CurrentInput = new KeySample();
// hide in a barrel?
//this.driverseat = new DriverSeat();
this.textures = textures;
this.Context = Context;
//for (int i = 0; i < 7; i++)
//{
// this.KarmaInput0.Enqueue(
// new KeySample()
// );
//}
visualshadow = new Image(
textures.barrel1_shadow()
).AttachTo(Context.Content_layer2_shadows);
visual = new Image(
textures.barrel1()
).AttachTo(Context.Content_layer3_buildings);
{
//initialize body
var bdef = new b2BodyDef();
bdef.type = Box2D.Dynamics.b2Body.b2_dynamicBody;
bdef.linearDamping = 8.0;
bdef.angularDamping = 8;
bdef.angle = 0;
this.body = Context.ground_b2world.CreateBody(bdef);
//initialize shape
var fixdef = new b2FixtureDef();
fixdef.density = 1;
fixdef.friction = 0.01;
//fixdef.restitution = 0.4; //positively bouncy!
var shape = new b2PolygonShape();
fixdef.shape = shape;
shape.SetAsBox(1.6, 1);
var fix = this.body.CreateFixture(fixdef);
var fix_data = new Action<double>(
jeep_forceA =>
{
if (jeep_forceA < 1)
return;
if (oncollision != null)
oncollision(this, jeep_forceA);
}
);
fix.SetUserData(fix_data);
}
{
//initialize body
var bdef = new b2BodyDef();
bdef.type = Box2D.Dynamics.b2Body.b2_dynamicBody;
bdef.linearDamping = 8.0;
bdef.angularDamping = 8;
bdef.angle = 0;
this.karmabody = Context.groundkarma_b2world.CreateBody(bdef);
//initialize shape
var fixdef = new b2FixtureDef();
fixdef.density = 1;
fixdef.friction = 0.01;
//fixdef.restitution = 0.4; //positively bouncy!
var shape = new b2PolygonShape();
fixdef.shape = shape;
shape.SetAsBox(1.6, 1);
this.karmabody.CreateFixture(fixdef);
}
Context.internalunits.Add(this);
}
public EdgeShapes()
{
// Ground body
{
b2BodyDef bd = new b2BodyDef();
b2Body ground = m_world.CreateBody(bd);
float x1 = -20.0f;
float y1 = 2.0f * (float) Math.Cos(x1 / 10.0f * b2Settings.b2_pi);
for (int i = 0; i < 80; ++i)
{
float x2 = x1 + 0.5f;
float y2 = 2.0f * (float) Math.Cos(x2 / 10.0f * b2Settings.b2_pi);
b2EdgeShape shape = new b2EdgeShape();
shape.Set(new b2Vec2(x1, y1), new b2Vec2(x2, y2));
ground.CreateFixture(shape, 0.0f);
x1 = x2;
y1 = y2;
}
}
{
b2Vec2[] vertices = new b2Vec2[3];
vertices[0].Set(-0.5f, 0.0f);
vertices[1].Set(0.5f, 0.0f);
vertices[2].Set(0.0f, 1.5f);
m_polygons[0] = new b2PolygonShape();
m_polygons[0].Set(vertices, 3);
}
{
b2Vec2[] vertices = new b2Vec2[3];
vertices[0].Set(-0.1f, 0.0f);
vertices[1].Set(0.1f, 0.0f);
vertices[2].Set(0.0f, 1.5f);
m_polygons[1] = new b2PolygonShape();
m_polygons[1].Set(vertices, 3);
}
{
float w = 1.0f;
float b = w / (2.0f + b2Math.b2Sqrt(2.0f));
float s = b2Math.b2Sqrt(2.0f) * b;
b2Vec2[] vertices = new b2Vec2[8];
vertices[0].Set(0.5f * s, 0.0f);
vertices[1].Set(0.5f * w, b);
vertices[2].Set(0.5f * w, b + s);
vertices[3].Set(0.5f * s, w);
vertices[4].Set(-0.5f * s, w);
vertices[5].Set(-0.5f * w, b + s);
vertices[6].Set(-0.5f * w, b);
vertices[7].Set(-0.5f * s, 0.0f);
m_polygons[2] = new b2PolygonShape();
m_polygons[2].Set(vertices, 8);
}
{
m_polygons[3] = new b2PolygonShape();
m_polygons[3].SetAsBox(0.5f, 0.5f);
}
{
m_circle.Radius = 0.5f;
}
m_bodyIndex = 0;
m_angle = 0.0f;
}
public virtual b2Shape Clone()
{
b2PolygonShape clone = new b2PolygonShape(this);
return(clone);
}
// Find the max separation between poly1 and poly2 using edge normals from poly1.
public static float b2FindMaxSeparation(out int edgeIndex,
b2PolygonShape poly1, ref b2Transform xf1,
b2PolygonShape poly2, ref b2Transform xf2)
{
int count1 = poly1.VertexCount;
b2Vec2[] normals1 = poly1.Normals;
// Vector pointing from the centroid of poly1 to the centroid of poly2.
b2Vec2 d = b2Math.b2Mul(xf2, poly2.Centroid) - b2Math.b2Mul(xf1, poly1.Centroid);
b2Vec2 dLocal1 = b2Math.b2MulT(xf1.q, d);
// Find edge normal on poly1 that has the largest projection onto d.
int edge = 0;
float maxDot = -b2Settings.b2_maxFloat;
for (int i = 0; i < count1; ++i)
{
float dot = b2Math.b2Dot(normals1[i], dLocal1);
if (dot > maxDot)
{
maxDot = dot;
edge = i;
}
}
// Get the separation for the edge normal.
float s = b2EdgeSeparation(poly1, xf1, edge, poly2, xf2);
// Check the separation for the previous edge normal.
int prevEdge = edge - 1 >= 0 ? edge - 1 : count1 - 1;
float sPrev = b2EdgeSeparation(poly1, xf1, prevEdge, poly2, xf2);
// Check the separation for the next edge normal.
int nextEdge = edge + 1 < count1 ? edge + 1 : 0;
float sNext = b2EdgeSeparation(poly1, xf1, nextEdge, poly2, xf2);
// Find the best edge and the search direction.
int bestEdge;
float bestSeparation;
int increment;
if (sPrev > s && sPrev > sNext)
{
increment = -1;
bestEdge = prevEdge;
bestSeparation = sPrev;
}
else if (sNext > s)
{
increment = 1;
bestEdge = nextEdge;
bestSeparation = sNext;
}
else
{
edgeIndex = edge;
return s;
}
// Perform a local search for the best edge normal.
for (; ; )
{
if (increment == -1)
edge = bestEdge - 1 >= 0 ? bestEdge - 1 : count1 - 1;
else
edge = bestEdge + 1 < count1 ? bestEdge + 1 : 0;
s = b2EdgeSeparation(poly1, xf1, edge, poly2, xf2);
if (s > bestSeparation)
{
bestEdge = edge;
bestSeparation = s;
}
else
{
break;
}
}
edgeIndex = bestEdge;
return bestSeparation;
}
public static void b2FindIncidentEdge(b2ClipVertex[] c,
b2PolygonShape poly1, b2Transform xf1, int edge1,
b2PolygonShape poly2, b2Transform xf2)
{
b2Vec2[] normals1 = poly1.Normals;
int count2 = poly2.VertexCount;
b2Vec2[] vertices2 = poly2.Vertices;
b2Vec2[] normals2 = poly2.Normals;
// Get the normal of the reference edge in poly2's frame.
b2Vec2 normal1 = b2Math.b2MulT(xf2.q, b2Math.b2Mul(xf1.q, normals1[edge1]));
// Find the incident edge on poly2.
int index = 0;
float minDot = b2Settings.b2_maxFloat;
for (int i = 0; i < count2; ++i)
{
float dot = b2Math.b2Dot(normal1, normals2[i]);
if (dot < minDot)
{
minDot = dot;
index = i;
}
}
// Build the clip vertices for the incident edge.
int i1 = index;
int i2 = i1 + 1 < count2 ? i1 + 1 : 0;
c[0].v = b2Math.b2Mul(xf2, vertices2[i1]);
c[0].id.indexA = (byte)edge1;
c[0].id.indexB = (byte)i1;
c[0].id.typeA = b2ContactFeatureType.e_face;
c[0].id.typeB = b2ContactFeatureType.e_vertex;
c[1].v = b2Math.b2Mul(xf2, vertices2[i2]);
c[1].id.indexA = (byte)edge1;
c[1].id.indexB = (byte)i2;
c[1].id.typeA = b2ContactFeatureType.e_face;
c[1].id.typeB = b2ContactFeatureType.e_vertex;
}
/// Compute the collision manifold between an edge and a circle.
public static void b2CollideEdgeAndPolygon(ref b2Manifold manifold,
b2EdgeShape edgeA, ref b2Transform xfA,
b2PolygonShape polygonB, ref b2Transform xfB)
{
b2EPCollider b = new b2EPCollider();
b.Collide(ref manifold, edgeA, ref xfA, polygonB, ref xfB);
}
public static float b2EdgeSeparation(b2PolygonShape poly1, b2Transform xf1, int edge1,
b2PolygonShape poly2, b2Transform xf2)
{
b2Vec2[] vertices1 = poly1.Vertices;
b2Vec2[] normals1 = poly1.Normals;
int count2 = poly2.VertexCount;
b2Vec2[] vertices2 = poly2.Vertices;
// Convert normal from poly1's frame into poly2's frame.
b2Vec2 normal1World = b2Math.b2Mul(xf1.q, normals1[edge1]);
b2Vec2 normal1 = b2Math.b2MulT(xf2.q, normal1World);
// Find support vertex on poly2 for -normal.
int index = 0;
float minDot = b2Settings.b2_maxFloat;
for (int i = 0; i < count2; ++i)
{
float dot = b2Math.b2Dot(ref vertices2[i], ref normal1);
if (dot < minDot)
{
minDot = dot;
index = i;
}
}
b2Vec2 v1 = b2Math.b2Mul(xf1, vertices1[edge1]);
b2Vec2 v2 = b2Math.b2Mul(xf2, vertices2[index]);
float separation = b2Math.b2Dot(v2 - v1, normal1World);
return separation;
}
/// <summary>
/// ��һ���ڳ��������һ����̬��bird����
/// �ڶ�����bird�����ж���
/// ����������box-2d����������bird�������������
/// </summary>
private void AddBird()
{
CCSprite bird = CCSprite.spriteWithFile("imgs/bird/bird_01");
bird.rotation = -15;
// bird���ж���֡����
List<CCSpriteFrame> frames = new List<CCSpriteFrame>();
for (int i = 1; i < 3; i++)
{
// ֡��ͼ
CCTexture2D texture = CCTextureCache.sharedTextureCache().addImage("imgs/bird/bird_0" + i);
// �������һ�������bug����������õĻ����ͻᲥ�Ų���������
texture.Name = (uint)i;
var frame = CCSpriteFrame.frameWithTexture(texture, new CCRect(0, 0, texture.ContentSizeInPixels.width, texture.ContentSizeInPixels.height));
frames.Add(frame);
}
// �����
CCAnimation marmotShowanimation = CCAnimation.animationWithFrames(frames, 0.1f);
CCAnimate flyAction = CCAnimate.actionWithAnimation(marmotShowanimation, false);
flyRepeatAction = CCRepeat.actionWithAction(flyAction, 2);
flyRepeatAction.tag = 0;
bird.runAction(flyRepeatAction);
// �����������ж���һ��body��������λ�ã�����bird��֮��Ӧ
b2BodyDef ballBodyDef = new b2BodyDef();
ballBodyDef.type = b2BodyType.b2_dynamicBody;
ballBodyDef.position = new b2Vec2(AppDelegate.screenSize.width / PTM_RATIO / 2, (float)(AppDelegate.screenSize.height / PTM_RATIO));
ballBodyDef.userData = bird;
birdBody = world.CreateBody(ballBodyDef);
// Ϊbody������״��������һЩ��������
b2PolygonShape shape = new b2PolygonShape();
shape.SetAsBox(bird.contentSize.width / 2 / PTM_RATIO, bird.contentSize.height / 2 / PTM_RATIO);
b2FixtureDef fixtureDef = new b2FixtureDef();
fixtureDef.shape = shape;
fixtureDef.density = 500.0f;
fixtureDef.friction = 0.5f;
birdBody.CreateFixture(fixtureDef);
this.addChild(bird);
}
/// Compute the collision manifold between a polygon and a circle.
public static void b2CollidePolygonAndCircle(ref b2Manifold manifold,
b2PolygonShape polygonA, ref b2Transform xfA,
b2CircleShape circleB, ref b2Transform xfB)
{
manifold.pointCount = 0;
// Compute circle position in the frame of the polygon.
b2Vec2 c = b2Math.b2Mul(xfB, circleB.Position);
b2Vec2 cLocal = b2Math.b2MulT(xfA, c);
// Find the min separating edge.
int normalIndex = 0;
float separation = -b2Settings.b2_maxFloat;
float radius = polygonA.Radius + circleB.Radius;
int vertexCount = polygonA.VertexCount;
b2Vec2[] vertices = polygonA.Vertices;
b2Vec2[] normals = polygonA.Normals;
for (int i = 0; i < vertexCount; ++i)
{
float s = b2Math.b2Dot(normals[i], cLocal - vertices[i]);
if (s > radius)
{
// Early out.
return;
}
if (s > separation)
{
separation = s;
normalIndex = i;
}
}
// Vertices that subtend the incident face.
int vertIndex1 = normalIndex;
int vertIndex2 = vertIndex1 + 1 < vertexCount ? vertIndex1 + 1 : 0;
b2Vec2 v1 = vertices[vertIndex1];
b2Vec2 v2 = vertices[vertIndex2];
// If the center is inside the polygon ...
if (separation < b2Settings.b2_epsilon)
{
manifold.pointCount = 1;
manifold.type = b2ManifoldType.e_faceA;
manifold.localNormal = normals[normalIndex];
manifold.localPoint = 0.5f * (v1 + v2);
manifold.points[0].localPoint = circleB.Position;
manifold.points[0].id = b2ContactFeature.Zero;
return;
}
// Compute barycentric coordinates
float u1 = b2Math.b2Dot(cLocal - v1, v2 - v1);
float u2 = b2Math.b2Dot(cLocal - v2, v1 - v2);
if (u1 <= 0.0f)
{
if (b2Math.b2DistanceSquared(cLocal, v1) > radius * radius)
{
return;
}
manifold.pointCount = 1;
manifold.type = b2ManifoldType.e_faceA;
manifold.localNormal = cLocal - v1;
manifold.localNormal.Normalize();
manifold.localPoint = v1;
manifold.points[0].localPoint = circleB.Position;
manifold.points[0].id = b2ContactFeature.Zero;
}
else if (u2 <= 0.0f)
{
if (b2Math.b2DistanceSquared(cLocal, v2) > radius * radius)
{
return;
}
manifold.pointCount = 1;
manifold.type = b2ManifoldType.e_faceA;
manifold.localNormal = cLocal - v2;
manifold.localNormal.Normalize();
manifold.localPoint = v2;
manifold.points[0].localPoint = circleB.Position;
manifold.points[0].id = b2ContactFeature.Zero;
}
else
{
b2Vec2 faceCenter = 0.5f * (v1 + v2);
separation = b2Math.b2Dot(cLocal - faceCenter, normals[vertIndex1]);
if (separation > radius)
{
return;
}
manifold.pointCount = 1;
manifold.type = b2ManifoldType.e_faceA;
manifold.localNormal = normals[vertIndex1];
manifold.localPoint = faceCenter;
manifold.points[0].localPoint = circleB.Position;
manifold.points[0].id = b2ContactFeature.Zero;
}
}
/// <summary>
/// ��һ����ӵ���
/// �ڶ�������box-2d�������潫������Ϊ��̬������ӵ�����������
/// </summary>
private void AddGround()
{
ground = CCSprite.spriteWithFile("imgs/ground/ground");
ground.position = new CCPoint(ground.contentSize.width / 2, ground.contentSize.height / 2);
b2BodyDef groundBodyDef = new b2BodyDef();
groundBodyDef.position = new b2Vec2(ground.contentSize.width / PTM_RATIO / 2, ground.contentSize.height / PTM_RATIO / 2);
groundBodyDef.userData = ground;
// ��������Ӱ�죬�����˶�
groundBodyDef.type = b2BodyType.b2_staticBody;
// ����ground���˶���ʹ���ٶ���bird�ķ����ٶ�һ��
var action1 = CCMoveTo.actionWithDuration(ground.contentSize.width / (4 * PTM_RATIO * flySpeed),
new CCPoint(ground.contentSize.width / 4, ground.position.y));
var action2 = CCMoveTo.actionWithDuration(0, new CCPoint(ground.contentSize.width / 2, ground.position.y));
var action = CCSequence.actionOneTwo(action1, action2);
var repeatAction = CCRepeatForever.actionWithAction(action);
repeatAction.tag = 0;
ground.runAction(repeatAction);
b2Body groundBody = world.CreateBody(groundBodyDef);
b2PolygonShape groundBox = new b2PolygonShape();
b2FixtureDef boxShapeDef = new b2FixtureDef();
boxShapeDef.shape = groundBox;
groundBox.SetAsBox(ground.contentSize.width / PTM_RATIO / 2, ground.contentSize.height / PTM_RATIO / 2);
groundBody.CreateFixture(boxShapeDef);
this.addChild(ground);
}