Box2DWeb，PolygonShape.SetAsVector未检测到碰撞

Question

这是问题

如果我用SetAsBox定义棒球棒没问题。

当我使用SetAsVector

定义它时会发生这种奇怪现象

this.view = new createjs.Bitmap("hammer.png");
this.view.regX = 0;
this.view.regY = 0;

var fixDef = new box2d.b2FixtureDef();
fixDef.density = 5.0;
fixDef.friction = 0.5;
fixDef.restitution = 0.8;
var bodyDef = new box2d.b2BodyDef();
bodyDef.type = box2d.b2Body.b2_kinematicBody;
fixDef.shape = new box2d.b2PolygonShape();
var vertices = []
vertices.push(new box2d.b2Vec2(30/SCALE, 0/SCALE));
vertices.push(new box2d.b2Vec2(14/SCALE, 0/SCALE));
vertices.push(new box2d.b2Vec2(17/SCALE, 10/SCALE));
vertices.push(new box2d.b2Vec2(17/SCALE, 100/SCALE));
vertices.push(new box2d.b2Vec2(0/SCALE, 290/SCALE));
vertices.push(new box2d.b2Vec2(12/SCALE, 300/SCALE));
vertices.push(new box2d.b2Vec2(32/SCALE, 300/SCALE));
vertices.push(new box2d.b2Vec2(44/SCALE, 290/SCALE));
vertices.push(new box2d.b2Vec2(27/SCALE, 100/SCALE));
vertices.push(new box2d.b2Vec2(27/SCALE, 10/SCALE));
fixDef.shape.SetAsVector(vertices, 10);
bodyDef.position.x = 600 / SCALE;
bodyDef.position.y = 300 / SCALE;
this.view.body =  world.CreateBody(bodyDef);
this.view.body.CreateFixture(fixDef);

有人知道吗？感谢。

Answer 1

SetAsVector方法需要凸多边形。但我认为你在这里设置的是凹陷的。

较新版本的Box2D支持从凹面中生成凸多边形，但我不认为Box2DWeb支持这一点。

您可以通过将凹多边形分成两个凸多边形并创建两个夹具而不是一个来解决此问题。

Wikipedia article about convex and concave polygons