ios - 用滑动分割 SKTextureNode

我正在尝试使用滑动手势将 SKTextureNode 拆分为多个部分。我有进入和退出的坐标。

如何使用它来拆分节点？

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Best Answer-推荐答案

我建议使用 SKPhysicsJointFixed 连接两个 SKSpriteNode 以形成一个对象。当用户在对象上滑动时，您可以通过移除关节来拆分它，并施加插入力以将碎片朝相反的方向发送。这是连接两个节点的方法:

- (void) connectNode1SKSpriteNode *)node1 toNode2SKSpriteNode *)node2
{
    CGPoint midPoint = CGPointMake((node1.position.x + node2.position.x)/2,
                                   (node1.position.y + node2.position.y)/2);

    SKPhysicsJointFixed *joint = [SKPhysicsJointFixed jointWithBodyA:node1.physicsBody
                                                               bodyB:node2.physicsBody
                                                              anchor:midPoint];
    [self.physicsWorld addJoint:joint];
}

这里有一个例子，如果它被触摸，如何分割它。这应该替换为滑动处理程序。

- (void) touchesBeganNSSet *)touches withEventUIEvent *)event {
    /* Called when a touch begins */

    for (UITouch *touch in touches) {
        CGPoint location = [touch locationInNode:self];

        // Determine which node was touched
        SKNode *touchedObject = [self nodeAtPoint:location];

        if (touchedObject == self) continue;

        // Check if node is connected
        if ([touchedObject.physicsBody.joints count]) {
            SKPhysicsJointFixed *joint = [touchedObject.physicsBody.joints firstObject];
            SKSpriteNode *node2 = (SKSpriteNode *)(touchedObject.physicsBody == joint.bodyA ?
                            joint.bodyB.node : joint.bodyA.node);

            [self.physicsWorld removeJoint:joint];
            CGFloat dx = touchedObject.position.x - node2.position.x;
            CGFloat dy = touchedObject.position.y - node2.position.y;

            CGFloat magnitude = sqrtf(dx*dx+dy*dy);

            // unit vector
            dx /= magnitude;
            dy /= magnitude;

            // send nodes in opposite directions
            [touchedObject.physicsBody applyImpulse:CGVectorMake(dx*20, dy*20)];
            [node2.physicsBody applyImpulse:CGVectorMake(-dx*20, -dy*20)];
        }
    }
}

关于ios - 用滑动分割 SKTextureNode，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25179021/