game-physics

问题 in SpriteKit we detect the in the didBeginContact method. but this looks a bit stupid to do something like that: func didBeginContact(contact: SKPhysicsContact) { if let contactA = contact.bodyA.node?.name { if let contactB = contact.bodyB.node?.name { //now that we have safely unwrapped these nodes, we can operate on them if contactA == "ball" { collisionBetweenBall(contact.bodyA.node!, object: contact.bodyB.node!) } else if contactB == "ball" { collisionBetweenBall(contact.bodyB.node!,

问题 in SpriteKit we detect the in the didBeginContact method. but this looks a bit stupid to do something like that: func didBeginContact(contact: SKPhysicsContact) { if let contactA = contact.bodyA.node?.name { if let contactB = contact.bodyB.node?.name { //now that we have safely unwrapped these nodes, we can operate on them if contactA == "ball" { collisionBetweenBall(contact.bodyA.node!, object: contact.bodyB.node!) } else if contactB == "ball" { collisionBetweenBall(contact.bodyB.node!,

问题 in SpriteKit we detect the in the didBeginContact method. but this looks a bit stupid to do something like that: func didBeginContact(contact: SKPhysicsContact) { if let contactA = contact.bodyA.node?.name { if let contactB = contact.bodyB.node?.name { //now that we have safely unwrapped these nodes, we can operate on them if contactA == "ball" { collisionBetweenBall(contact.bodyA.node!, object: contact.bodyB.node!) } else if contactB == "ball" { collisionBetweenBall(contact.bodyB.node!,

问题 in SpriteKit we detect the in the didBeginContact method. but this looks a bit stupid to do something like that: func didBeginContact(contact: SKPhysicsContact) { if let contactA = contact.bodyA.node?.name { if let contactB = contact.bodyB.node?.name { //now that we have safely unwrapped these nodes, we can operate on them if contactA == "ball" { collisionBetweenBall(contact.bodyA.node!, object: contact.bodyB.node!) } else if contactB == "ball" { collisionBetweenBall(contact.bodyB.node!,

问题 I am building a game using Spritekit and am trying to build a raycast that will connect the player with the point where the player tapped. It will be like a rope that connects the player to the point where he or she tapped. For example if a player taps at the point x: 0, y: 0 then it will become a rope that connects both things with each other. With the time the rope will become shorter and the player will be dragged against it. The player does have a physicsbody. When the player releases the

问题 simple question, but couldn't find an answer: Can static bodies apply collision impulses to dynamic bodies? here's a little recording of what my code does As you can see, the two dynamic triangles collide with each other, and are stopped by the static line. however, the behavior is not what I want. If I had only one triangle, it would be skidding down the ledge on just one vertex --> the static body does not inflict any sort of torque or counter forces (I'm no physicist) on the triangles.

问题 simple question, but couldn't find an answer: Can static bodies apply collision impulses to dynamic bodies? here's a little recording of what my code does As you can see, the two dynamic triangles collide with each other, and are stopped by the static line. however, the behavior is not what I want. If I had only one triangle, it would be skidding down the ledge on just one vertex --> the static body does not inflict any sort of torque or counter forces (I'm no physicist) on the triangles.

问题 I'm trying to build a simple side scroller with an airplane being the player. As such, I want to build simple flight controls with simple but realistic-feeling physics. I'm making use of cocos2D and Box2D. I have a basic system working, but just can't get the physics feeling correct. I am applying force to the plane (which is a b2CircleShape ) based on the user's input. So, basically, if the user pushes up, body_->ApplyForce(b2Vec2(10,30), body_->GetPosition()) is called. Similarly, for down

问题 Hi i am currently working on a mini game for class (first time doing something like this) and i dont really know how to start with collision detection at all. Okay the game i'm creating is a top down sumo fighting game on a icy circular arena where you move around gaining momentum and velocity and try to knock each other off to gain points. So far i have the movement acceleration/friction pretty much down and I also have a system to detect when a collision occurs, i just don't know how to

问题 Hi i am currently working on a mini game for class (first time doing something like this) and i dont really know how to start with collision detection at all. Okay the game i'm creating is a top down sumo fighting game on a icy circular arena where you move around gaining momentum and velocity and try to knock each other off to gain points. So far i have the movement acceleration/friction pretty much down and I also have a system to detect when a collision occurs, i just don't know how to