Question

我仍然是spritekit中的超级菜鸟，并试图在这里和那里得到一些教程..

我试图像这样的火柴人形象 stickman 跳到高层建筑物并在撞击地面节点时反弹

当节点是圆形物理体球时，它工作正常

但是当尝试矩形的物理体时......它永远不会反弹..我甚至尝试过这段代码

SKSpriteNode * victim = [SKSpriteNode spriteNodeWithImageNamed:@"victim_base"];
    victim.position = CGPointMake(5, 500);
    victim.zPosition = 2;
    victim.name = @"victim";
    victim.xScale=0.7;
    victim.yScale=0.7;
    [self addChild:victim];

    CGFloat offsetX = victim.frame.size.width * victim.anchorPoint.x;
    CGFloat offsetY = victim.frame.size.height * victim.anchorPoint.y;

    CGMutablePathRef path = CGPathCreateMutable();

    CGPathMoveToPoint(path, NULL, 13 - offsetX, 59 - offsetY);
    CGPathAddLineToPoint(path, NULL, 43 - offsetX, 58 - offsetY);
    CGPathAddLineToPoint(path, NULL, 38 - offsetX, 3 - offsetY);
    CGPathAddLineToPoint(path, NULL, 7 - offsetX, 3 - offsetY);

    CGPathCloseSubpath(path);
    victim.physicsBody = [SKPhysicsBody bodyWithPolygonFromPath:path];
    victim.physicsBody.friction = 0.0f;
    // 4
    victim.physicsBody.restitution = 1.0f;
    // 5
    victim.physicsBody.linearDamping = 0.0f;
    // 6
    victim.physicsBody.allowsRotation = NO;

    [victim.physicsBody applyImpulse:CGVectorMake(10.0f, -10.0f)];

重力世界的设置是

self.physicsWorld.gravity = CGVectorMake(0.0f, 0.0f);
// 1 Create an physics body that borders the screen
SKPhysicsBody* borderBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:self.frame];
// 2 Set physicsBody of scene to borderBody
self.physicsBody = borderBody;
// 3 Set the friction of that physicsBody to 0
self.physicsBody.friction = 0.0f;

但是他正在跳跃，只是保持不动，没有弹跳

我真的无法弄清楚这里有什么不对。非常感谢。

Answer 1

查看此示例

#import "milkhuntMyScene.h"

@implementation milkhuntMyScene

-(id)initWithSize:(CGSize)size {    
    if (self = [super initWithSize:size]) {
        /* Setup your scene here */

        self.backgroundColor = [SKColor colorWithRed:0.15 green:0.15 blue:0.3 alpha:1.0];

        SKLabelNode *myLabel = [SKLabelNode labelNodeWithFontNamed:@"Chalkduster"];

        myLabel.text = @"";
        myLabel.fontSize = 30;
        myLabel.position = CGPointMake(CGRectGetMidX(self.frame),
                                       CGRectGetMidY(self.frame));

        [self addChild:myLabel];
        self.physicsBody=[SKPhysicsBody bodyWithEdgeLoopFromRect:self.frame];
        self.physicsWorld.gravity=CGVectorMake(0.0, -9.8);

        SKSpriteNode *node=[SKSpriteNode spriteNodeWithImageNamed:@"dummy"];
        node.physicsBody=[SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(node.size.width, node.size.height)];
        node.position=CGPointMake(200, 50);
        node.physicsBody.affectedByGravity=FALSE;
        node.physicsBody.dynamic=TRUE;
        node.physicsBody.restitution=1;
        node.physicsBody.allowsRotation=FALSE;
        node.physicsBody.mass=9999999;

        [self addChild:node];

    }
    return self;
}
//




//
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    /* Called when a touch begins */

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

        SKSpriteNode *sprite = [SKSpriteNode spriteNodeWithImageNamed:@"Spaceship"];
        sprite.xScale=sprite.yScale=0.5;
        sprite.position = location;
        sprite.physicsBody.allowsRotation=FALSE;
        sprite.physicsBody.restitution=1.0;
          sprite.physicsBody.angularDamping=0.0;
        sprite.physicsBody.linearDamping=0.0;
      //  SKAction *action = [SKAction rotateByAngle:M_PI duration:1];

        //[sprite runAction:[SKAction repeatActionForever:action]];
        sprite.physicsBody=[SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(sprite.size.width, sprite.size.height)];
        [self addChild:sprite];
    }
}

-(void)update:(CFTimeInterval)currentTime {
    /* Called before each frame is rendered */
}

@end

SpriteKit：让火柴人反弹

1 个答案: