I am simulating physics to an egg shape SKSprite node. However, there is assertion failed error occur:
Assertion failed: (edge.LengthSquared() > 1.19209290e-7F * 1.19209290e-7F), function Set, file /SourceCache/PhysicsKit_Sim/PhysicsKit-6.5.4/PhysicsKit/Box2D/Collision/Shapes/b2PolygonShape.cpp, line 180.
the following is the code:
self.egg = [SKSpriteNode spriteNodeWithImageNamed:IMAGE_NAME_EGG];
[self.egg setScale:0.2];
self.egg.position = CGPointMake(self.size.width/2,self.size.height - self.egg.size.height/2);
self.egg.name = IMAGE_NAME_EGG;
CGPoint startPoint = CGPointMake(0, self.egg.size.height*0.4);
CGPoint endPoint = CGPointMake(self.egg.size.width, startPoint.y);
CGPoint controlPointLeft = CGPointMake(startPoint.x, self.egg.size.height);
CGPoint controlPointRight = CGPointMake(endPoint.x, controlPointLeft.y);
CGMutablePathRef pathRef = CGPathCreateMutable();
CGPathMoveToPoint(pathRef, NULL, startPoint.x, startPoint.y);
CGPathAddQuadCurveToPoint(pathRef, NULL, controlPointLeft.x, controlPointLeft.y, self.egg.size.width/2, controlPointLeft.y);
CGPathAddQuadCurveToPoint(pathRef, NULL, controlPointRight.x, controlPointRight.y, endPoint.x,endPoint.y);
CGPathAddArc(pathRef, NULL, self.egg.size.width/2, startPoint.y, self.egg.size.width/2, 0, M_PI, NO);
self.egg.physicsBody = [SKPhysicsBody bodyWithPolygonFromPath:pathRef];
self.egg.physicsBody.dynamic = YES;
self.egg.physicsBody.categoryBitMask = eggCategory;
self.egg.physicsBody.contactTestBitMask = rabbitCategory;
self.egg.physicsBody.collisionBitMask = rabbitCategory;
self.egg.physicsBody.allowsRotation = YES;
[self addChild:self.egg];
What's wrong? can anyone help me to fix? thank you very much!
According to the assertion, one of the edges is shorter than the minimum size expected by sprite kit.
Assertion failed: (edge.LengthSquared() > 1.19209290e-7F * 1.19209290e-7F)
Check your path coordinates and ensure it's not too small.