我有一棵由一系列关节构成的树。锚点是树的基础/树桩。我的英雄目前无法穿过锚。设置 collisionBitMask = 0 不适用于锚点,但该方法确实适用于各个关节段。
所以,基本上我只是想避免这种碰撞。这是代码:
//锚点代码
let chunkHolder = SKSpriteNode(imageNamed: ImageName.ChunkHolder)
chunkHolder.position = anchorPoint
chunkHolder.physicsBody = SKPhysicsBody(circleOfRadius: chunkHolder.size.width / 2)
chunkHolder.physicsBody?.isDynamic = false
chunkHolder.physicsBody?.categoryBitMask = PhysicsCategory.chunkAnchor.rawValue
chunkHolder.physicsBody?.collisionBitMask = 0
addChild(chunkHolder)
// hero 正确通过的各个树段:
for i in 0..<length {
let treeSegment = SKSpriteNode(imageNamed: ImageName.ChunkTexture)
let offset = treeSegment.size.height * CGFloat(i + 1)
treeSegment.position = CGPoint(x: anchorPoint.x, y: anchorPoint.y - offset)
treeSegment.name = "tree" + String(i)
treeSegments.append(treeSegment)
addChild(treeSegment)
treeSegment.physicsBody = SKPhysicsBody(rectangleOf: treeSegment.size)
treeSegment.physicsBody?.collisionBitMask = 0
}
//关节
for i in 1..<length {
let nodeA = treeSegments[i - 1]
let nodeB = treeSegments[i]
let joint = SKPhysicsJointPin.joint(withBodyA: nodeA.physicsBody!, bodyB: nodeB.physicsBody!, anchor: CGPoint(x: nodeA.frame.midX, y: nodeA.frame.minY))
scene.physicsWorld.add(joint)
}
//这里参考的是Hero的物理体:
self.physicsBody?.categoryBitMask = PhysicsCategory.hero.rawValue
self.physicsBody?.contactTestBitMask = PhysicsCategory.ground.rawValue
此外,将 hero 的 collisionBitMask 设置为 0 目前也无济于事,因为此时 hero 也会从地面/地板上掉下来。